CN105322095B - White organic light emitting device - Google Patents

White organic light emitting device Download PDF

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Publication number
CN105322095B
CN105322095B CN201510272176.7A CN201510272176A CN105322095B CN 105322095 B CN105322095 B CN 105322095B CN 201510272176 A CN201510272176 A CN 201510272176A CN 105322095 B CN105322095 B CN 105322095B
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emitting layer
light emitting
illumination region
red
layer
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CN105322095A (en
Inventor
安昭姸
韩敞旭
崔晎硕
郑承龙
朴正洙
李慜揆
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LG Display Co Ltd
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LG Display Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/12—Passive devices, e.g. 2 terminal devices
    • H01L2924/1204—Optical Diode
    • H01L2924/12044—OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2101/00—Properties of the organic materials covered by group H10K85/00
    • H10K2101/10—Triplet emission

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

Disclose a kind of white organic light emitting device.The white organic light emitting device includes：The first illumination region between first electrode and second electrode；The second illumination region on first illumination region；With the third illumination region on second illumination region.At least one of first illumination region, the second illumination region and third illumination region include at least two luminescent layers for having red light emitting layer, and set the position of the red light emitting layer at least one of raising color reproduction rate and red efficiency, green efficiency and blue efficiency.

Description

White organic light emitting device
This application claims the South Korea patent application No.10-2014-0063238 submitted on May 26th, 2014, in Augusts, 2014 The South Korea patent application No.10-2014-0099121 and the South Korea patent application submitted on April 23rd, 2015 submitted for 1 The priority of No.10-2015-0057516 here cites these patent applications as reference, as fully expounded one herein Sample.
Technical field
The present invention relates to a kind of organic light emitting apparatus more particularly to it is a kind of for improve the excitation purity of device, luminous intensity, The white organic light emitting device of brightness and color reproduction rate.
Background technology
Recently, as social development is information guiding society, the field of display devices of telecommunications information signal is visually presented It is fast-developing.FPD (FPD) equipment with outstanding performance is developed in terms of thin type, lightweight and low-power consumption.
The example of FPD equipment includes that LCD device, plasma display panel (PDP) equipment, field emission display (FED) are set Standby, oganic light-emitting display device etc..
In particular, oganic light-emitting display device is selfluminous device.Compared with other FPD equipment, organic light emitting display is set It is standby that there is fast response time, high-luminous-efficiency, high brightness and wide viewing angle.
Organic light emitting apparatus includes the organic luminous layer to be formed between two electrodes.Electrons and holes are noted from two electrodes Enter into organic luminous layer, exciton is generated with hole by combining electronics.Organic light emitting apparatus is using when the exciton generated The device of the principle to shine when dropping to ground state from excitation state.
In the organic light emitting apparatus of the prior art, due to the light emitting structure and material of organic luminous layer, the characteristics of luminescence and Service life is restricted.Therefore, it is proposed to the various methods of the efficiency for improving the luminescent layer in white organic light emitting device.
In one approach, it is possible to provide a kind of to emit white light by the way that two luminescent layers with complementary colors relationship are laminated Structure.However, in this configuration, when white light passes through colour filter, in the peak wavelength range and colour filter of each luminescent layer Regional transmission between generate difference.Due to this, the color gamut that can be presented narrows, thus is difficult to realize desired color Recall factor.
For example, when blue light-emitting layer and Yellow luminous layer is laminated, peak wavelength is set to blue wavelength region and yellow In wave-length coverage, thus emit white light.When white light passes through red, green and blue colour filter, with red or green wavelength model It encloses and compares, the decrease in transmission of blue wavelength region, due to this, luminous efficiency and color reproduction rate reduce.
Moreover, the luminous efficiency of yellow phosphorescence luminescent layer is relatively higher than the luminous efficiency of blue luminescence layer, thus, by Efficiency variance between phosphorescence luminescent layer and fluorescent light-emitting layer, panel efficiency and color reproduction rate reduce.
In addition, when adjusting colour filter to improve color reproduction rate, decrease in transmission, due to this, panel efficiency It reduces.
Invention content
Therefore, present inventors have recognized that the above problem, to improving the luminous efficiency of luminescent layer and the color reproduction rate of device Various methods are tested.By various experiments, the present inventor invented it is a kind of have for improve excitation purity, brightness and The white organic light emitting device of the new construction of color reproduction rate.
Therefore, the present invention is intended to provide one kind substantially overcomes one caused by limitations and shortcomings of the prior art The white organic light emitting device of a or multiple problems.
One aspect of the present invention is intended to provide a kind of by the way that three illumination region application tools, there are three the knots of luminescence peak Structure improves the white organic light emitting device of excitation purity and color reproduction rate.
Another aspect of the present invention is intended to provide a kind of for improving luminous intensity, the white of brightness and color reproduction rate Organic light emitting apparatus.
The purpose of the present invention is not limited to as previously mentioned, but one of ordinary skill in the art will clearly from following description Understand the other purposes not described herein.
The attendant advantages and feature of the present invention, a part for these advantages and features will be partly listed in the following description One of ordinary skill in the art will become obvious according to following explanation or can be through the invention implementation understand. Object of the present invention and its can be realized and obtain by the structure specifically noted in specification, claims and attached drawing His advantage.
In order to achieve these and other advantages and intention according to the present invention is carried as embodied and be broadly described herein A kind of white organic light emitting device has been supplied, including：The first illumination region between first electrode and second electrode；Positioned at described The second illumination region on first illumination region；With the third illumination region on second illumination region, wherein described first shine At least one of portion, the second illumination region and third illumination region include at least two luminescent layers for having red light emitting layer, and described The position of red light emitting layer be arranged to improve color reproduction rate and red efficiency, green efficiency and blue efficiency at least it One.
At least two luminescent layer may include blue light-emitting layer and the red light emitting layer.
When first illumination region includes at least two luminescent layer, the blue light-emitting layer is than the red hair Photosphere is closer to the first electrode.
With the red light emitting layer than the blue light-emitting layer closer to the first electrode situation compared with, in the indigo plant Than the red light emitting layer closer in the situation of the first electrode, color visual angle can be improved color luminescent layer.
When the third illumination region includes at least two luminescent layer, the blue light-emitting layer is than the red hair Photosphere is closer to the second electrode.
With the red light emitting layer than the blue light-emitting layer closer to the second electrode situation compared with, in the indigo plant Than the red light emitting layer closer in the situation of the second electrode, color visual angle can be improved color luminescent layer.
First illumination region or the third illumination region can have there are two luminescence peak, and described two luminescence peaks can divide It Wei Yu not be in the range of 440nm to 480nm and in the range of 600nm to 650nm.
The blue light-emitting layer may include at least one of blue light-emitting layer, navy blue luminescent layer and sky blue luminescent layer.
Matrix in the red light emitting layer may include the matrix with the wave-length coverage shorter than red wavelength range, to carry The luminous efficiency of each of the high blue light-emitting layer and the red light emitting layer simultaneously reduces driving voltage.
The energy gap between matrix and dopant in the red light emitting layer can be more than the matrix in the blue light-emitting layer Energy gap between dopant, to improve the luminous efficiency of each and drop of the blue light-emitting layer and the red light emitting layer Low driving voltage.
The energy gap of matrix in the blue light-emitting layer can be 2.8eV to 3.2eV, and the doping in the blue light-emitting layer The energy gap of agent can be 2.6eV to 3.0eV.
The energy gap of matrix in the red light emitting layer can be 2.6eV to 3.0eV, and the doping in the red light emitting layer The energy gap of agent can be 1.8eV to 2.2eV.
The energy gap between matrix and dopant in the blue light-emitting layer is smaller than equal to 0.4eV, and the red hair The energy gap between matrix and dopant in photosphere can be more than 0.4eV and be less than or equal to 1.2eV.
Second illumination region may include at least one of green light emitting layer and yellow green luminescent layer.
The luminescence peak of the green light emitting layer can be located in the range of 510nm to 570nm, and the yellow green luminescent layer Luminescence peak can be located at 540nm to 580nm in the range of.
The wavelength of the green light emitting layer can be shorter than the wavelength of the yellow green luminescent layer, to improve green efficiency.
First illumination region can have the luminescence peak being located in 440nm to 480nm ranges, and second illumination region There can be the luminescence peak being located in 510nm to 580nm ranges.
First illumination region can have the luminescence peak being located in 510nm to 580nm ranges, and second illumination region There can be the luminescence peak being located in 440nm to 480nm ranges.
Second illumination region can have the luminescence peak being located in 510nm to 580nm ranges, and the third illumination region There can be the luminescence peak being located in 440nm to 480nm ranges.
Second illumination region can have the luminescence peak being located in 440nm to 480nm ranges, and the third illumination region There can be the luminescence peak being located in 510nm to 580nm ranges.
In another aspect of this invention, a kind of white organic light emitting device is provided, including：Positioned at first electrode and the second electricity The first illumination region between pole；The second illumination region on first illumination region；With on second illumination region Third illumination region, wherein at least one of first illumination region, the second illumination region and third illumination region include having red hair The luminescent layer of photosphere, to improve luminous efficiency and color reproduction rate or color visual angle, and first illumination region, the second illumination region Include-three luminescence peak of three light-emitting zones with three or more luminescence peaks at least one of third illumination region (TER-TEP) structure.
First illumination region may include blue light-emitting layer and the red light emitting layer.
With the red light emitting layer than the blue light-emitting layer closer to the first electrode situation compared with, in the indigo plant Than the red light emitting layer closer in the situation of the first electrode, color visual angle can be improved color luminescent layer.
Matrix in the red light emitting layer may include the matrix with the wave-length coverage shorter than red wavelength range, to carry The luminous efficiency of each of the high blue light-emitting layer and the red light emitting layer simultaneously reduces driving voltage.
The energy gap between matrix and dopant in the red light emitting layer can be more than the matrix in the blue light-emitting layer Energy gap between dopant, to improve the luminous efficiency of each and drop of the blue light-emitting layer and the red light emitting layer Low driving voltage.
The energy gap of matrix in the blue light-emitting layer can be 2.8eV to 3.2eV, and the doping in the blue light-emitting layer The energy gap of agent can be 2.6eV to 3.0eV.
The energy gap of matrix in the red light emitting layer can be 2.6eV to 3.0eV, and the doping in the red light emitting layer The energy gap of agent can be 1.8eV to 2.2eV.
The energy gap between matrix and dopant in the blue light-emitting layer is smaller than equal to 0.4eV, and the red hair The energy gap between matrix and dopant in photosphere can be more than 0.4eV and be less than or equal to 1.2eV.
First illumination region can have there are two luminescence peak, and described two luminescence peaks can be located separately 440nm and arrive In the range of 480nm and in the range of 600nm to 650nm.
Second illumination region can have the luminescence peak being located in 510nm to 580nm ranges, and the third illumination region There can be the luminescence peak being located in 440nm to 480nm ranges.
Second illumination region can have the luminescence peak being located in 440nm to 480nm ranges, and the third illumination region There can be the luminescence peak being located in 510nm to 580nm ranges.
The third illumination region may include blue light-emitting layer and the red light emitting layer.
With the red light emitting layer than the blue light-emitting layer closer to the second electrode situation compared with, in the indigo plant For color luminescent layer than the red light emitting layer closer in the situation of the second electrode, color visual angle, which obtains, can arrive improvement.
The third illumination region can have there are two luminescence peak, and described two luminescence peaks can be located separately 440nm and arrive In the range of 480nm and in the range of 600nm to 650nm.
First illumination region can have the luminescence peak being located in 440nm to 480nm ranges, and second illumination region There can be the luminescence peak being located in 510nm to 580nm ranges.
First illumination region can have the luminescence peak being located in 510nm to 580nm ranges, and second illumination region There can be the luminescence peak being located in 440nm to 480nm ranges.
In still another aspect of the invention, a kind of white organic light emitting device is provided, including：Positioned at first electrode and the second electricity The first illumination region between pole；With the second illumination region on first illumination region, wherein first illumination region and At least one of two illumination regions include at least two luminescent layers for having red light emitting layer, and the position quilt of the red light emitting layer It is set as improving at least one of color reproduction rate and red efficiency, green efficiency and blue efficiency.
First illumination region may include that at least two luminescent layer, at least two luminescent layer may include blue hair Photosphere and the red light emitting layer.
With the red light emitting layer than the blue light-emitting layer closer to the first electrode situation compared with, in the indigo plant Than the red light emitting layer closer in the situation of the first electrode, color visual angle can be improved color luminescent layer.
First illumination region can have there are two luminescence peak, and described two luminescence peaks can be located separately 440nm and arrive In the range of 480nm and in the range of 600nm to 650nm.
Matrix in the red light emitting layer may include the matrix with the wave-length coverage shorter than red wavelength range, to carry The luminous efficiency of each of the high blue light-emitting layer and the red light emitting layer simultaneously reduces driving voltage.
The energy gap between matrix and dopant in the red light emitting layer can be more than the matrix in the blue light-emitting layer Energy gap between dopant, to improve the luminous efficiency of each and drop of the blue light-emitting layer and the red light emitting layer Low driving voltage.
The energy gap of matrix in the blue light-emitting layer can be 2.8eV to 3.2eV, and the doping in the blue light-emitting layer The energy gap of agent can be 2.6eV to 3.0eV.
The energy gap of matrix in the red light emitting layer can be 2.6eV to 3.0eV, and the doping in the red light emitting layer The energy gap of agent can be 1.8eV to 2.2eV.
The energy gap between matrix and dopant in the blue light-emitting layer is smaller than equal to 0.4eV, and the red hair The energy gap between matrix and dopant in photosphere can be more than 0.4eV and be less than or equal to 1.2eV.
The luminescence peak of second illumination region can be located in the range of 510nm to 580nm.
In still another aspect of the invention, a kind of white organic light emitting device is provided, including：Positioned at first electrode and the second electricity The first illumination region between pole；With the second illumination region on first illumination region, wherein first illumination region and At least one of two illumination regions include the luminescent layer for having red light emitting layer, and the position of the red light emitting layer is arranged to carry At least one of high color reproduction rate and red efficiency, green efficiency and blue efficiency, first illumination region and second shines Portion includes-three luminescence peak of three light-emitting zones (TER-TEP) structure with three or more luminescence peaks.
First illumination region may include that the luminescent layer, the luminescent layer may include blue light-emitting layer and the red hair Photosphere.
With the red light emitting layer than the blue light-emitting layer closer to the first electrode situation compared with, in the indigo plant Than the red light emitting layer closer in the situation of the first electrode, color visual angle can be improved color luminescent layer.
First illumination region can have there are two luminescence peak, and described two luminescence peaks can be located separately 440nm and arrive In the range of 480nm and in the range of 600nm to 650nm.
Matrix in the red light emitting layer may include the matrix with the wave-length coverage shorter than red wavelength range, to carry The luminous efficiency of each of the high blue light-emitting layer and the red light emitting layer simultaneously reduces driving voltage.
The energy gap between matrix and dopant in the red light emitting layer can be more than the matrix in the blue light-emitting layer Energy gap between dopant, to improve the luminous efficiency of each and drop of the blue light-emitting layer and the red light emitting layer Low driving voltage.
The energy gap of matrix in the blue light-emitting layer can be 2.8eV to 3.2eV, and the doping in the blue light-emitting layer The energy gap of agent can be 2.6eV to 3.0eV.
The energy gap of matrix in the red light emitting layer can be 2.6eV to 3.0eV, and the doping in the red light emitting layer The energy gap of agent can be 1.8eV to 2.2eV.
The energy gap between matrix and dopant in the blue light-emitting layer is smaller than equal to 0.4eV, and the red hair The energy gap between matrix and dopant in photosphere can be more than 0.4eV and be less than or equal to 1.2eV.
The luminescence peak of second illumination region can be located in the range of 510nm to 580nm.
The details of embodiment is contained in detailed description and attached drawing.
It should be appreciated that the substantially property description of present invention front and following detailed description are all illustrative and explanatory , it is intended that provide further explanation to claimed invention.
Description of the drawings
It is further understood to present invention offer and the attached drawing for being incorporated herein composition the application part illustrates this hair Bright embodiment, and be used to explain the principle of the present invention together with specification.In the accompanying drawings：
Fig. 1 is the diagram for illustrating the white organic light emitting device according to first embodiment of the invention；
Fig. 2 is the diagram for the luminous position for illustrating the luminescent layer according to second embodiment of the invention；
Fig. 3 is the luminous intensity and hair being illustrated at the luminous position according to the luminescent layer of second embodiment of the invention The diagram of light curve；
Fig. 4 is to illustrate the change based on the visual angle at the luminous position of the luminescent layer according to second embodiment of the invention Change, the diagram at color visual angle；
Fig. 5 is the diagram for the luminous position for illustrating the luminescent layer according to third embodiment of the present invention；
Fig. 6 is the luminous intensity and hair being illustrated at the luminous position according to the luminescent layer of third embodiment of the present invention The diagram of light curve；
Fig. 7 is to illustrate the change based on the visual angle at the luminous position of the luminescent layer according to third embodiment of the present invention Change, the diagram at color visual angle；
Fig. 8 is the diagram for illustrating the white organic light emitting device according to the 4th embodiment of the invention；
Fig. 9 is the diagram for the luminous position for illustrating the luminescent layer according to the 4th embodiment of the invention；
Figure 10 is to illustrate shining according to the white organic light emitting device of the 4th embodiment of the invention and comparative example The diagram of intensity；
Figure 11 is the diagram for illustrating the white organic light emitting device according to the 5th embodiment of the invention；
Figure 12 is the diagram for the luminous position for illustrating the luminescent layer according to the 5th embodiment of the invention；
Figure 13 is to illustrate shining according to the white organic light emitting device of the 5th embodiment of the invention and comparative example The diagram of intensity；
Figure 14 A- Figure 14 B are to illustrate to advocate tissue rule according to the digital movie of the 4th embodiment of the invention and comparative example The diagram of model (DCI)；
Figure 15 A- Figure 15 B are the diagrams for illustrating the DCI according to the 5th embodiment of the invention and comparative example；
Figure 16 is the diagram for illustrating the white organic light emitting device according to the 6th embodiment of the invention；
Figure 17 is to illustrate shining according to the white organic light emitting device of the 6th embodiment of the invention and comparative example The diagram of intensity；
Figure 18 A- Figure 18 B are the diagrams for illustrating the DCI according to the 6th embodiment of the invention and comparative example；
Figure 19 is the schematic cross sectional view for illustrating the white organic light emitting device according to the 7th embodiment of the invention；
Figure 20 is the diagram for the luminous intensity for illustrating the luminescent layer according to the 7th embodiment of the invention；
Figure 21 is the energy band diagram for illustrating the luminescent layer according to the 7th embodiment of the invention；
Figure 22 is the diagram for the luminous intensity for illustrating the red light emitting layer according to the 8th embodiment of the invention；
Figure 23 is illustrated according to the 9th blue light-emitting layer of embodiment of the invention and the luminous intensity of red light emitting layer Diagram；
Figure 24 is the energy band diagram for illustrating the luminescent layer according to the 9th embodiment of the invention；
Figure 25 is the schematic cross sectional view for illustrating the white organic light emitting device according to the tenth embodiment of the invention；
Figure 26 is the schematic cross sectional view for illustrating the white organic light emitting device according to the 11st embodiment of the invention；
Figure 27 is illustrated according to the tenth embodiment of the invention, the 11st embodiment and comparative example of the invention The diagram of the luminous intensity of white organic light emitting device；And
Figure 28 is the diagram for illustrating the oganic light-emitting display device according to embodiment of the present invention.
Specific implementation mode
Exemplary embodiments of the present invention are will be described in now, illustrate these embodiments some in the accompanying drawings Example.Make that same or similar part is designated by like reference numerals throughout throughout the drawings as much as possible.
The following embodiments described by referring to accompanying drawing are illustrated into advantages and features of the invention and its implementation. However, the present invention can be implemented in different forms, embodiment listed here should not be construed as limited by.And it is to provide this A little embodiments are and the scope of the present invention fully to be passed to fields technology to keep this specification full and complete Personnel.In addition, the present invention is only limited by the range of claims.
In order to describe embodiments of the present invention and disclosed shape, size, ratio, angle and quantity is only in the accompanying drawings It is example, thus the present invention is not limited to the details of diagram.Similar reference marker indicates similar element in the whole text.It is retouched in following In stating, it can unnecessarily make the emphasis of the present invention smudgy the detailed description of relevant known function or construction when determining When, the detailed description will be omitted.In the case of using " comprising ", " having " and "comprising" in the present specification, other can be added Component, unless having used " only ".The term of singulative may include plural form, unless the contrary indication.
When explaining an element, although not being expressly recited, which is interpreted to include error range.
When describing position relationship, for example, the position relationship between two components be described as " ... on ", " in ... top ", " in ... lower section " and " with ... it is adjacent " when, can be arranged between these two parts it is one or more its His component, unless having used " just " or " direct ".
When describing time relationship, for example, when time sequencing is described as " ... after ", " subsequent ", " following " and " ... before " when, it may include discontinuous situation, unless having used " just " or " direct ".
It will be understood that although term " first ", " second " etc. herein can be used to describe various elements, these elements It should not be limited by these terms.These terms are intended merely to the element that is distinguished from each other.For example, not departing from the scope of the present invention In the case of, first element may be known as second element, and similarly, second element may be known as first element.
One of ordinary skill in the art can fully understand that the feature of each embodiment of the present invention can each other partially or entirely In conjunction with or combination, and can technically carry out various interoperability and driving each other.Embodiments of the present invention can be real independently of one another It applies, or with complementary relationship common implementing.
Hereafter, embodiments of the present invention be will be described in detail with reference to the accompanying drawings.
Fig. 1 is the diagram for illustrating the white organic light emitting device 100 according to first embodiment of the invention.
White organic light emitting device 100 shown in Fig. 1 include substrate 101, the first and second electrodes 102 and 104 and The first illumination region 110, the second illumination region 120 between the first and second electrodes 102 and 104 and third illumination region 130.
First electrode 102 is to provide the anode in hole, and can be by as the saturating of such as transparent conductive oxide (TCO) etc Tin indium oxide (ITO) or indium zinc oxide (IZO) formation of bright conductive material.However, present embodiment is without being limited thereto.
Second electrode 104 is to provide the cathode of electronics, and can by as metal material gold (Au), silver-colored (Ag), aluminium (Al), Molybdenum (Mo) or magnesium (Mg) formation, or can be formed by their alloy.However, present embodiment is without being limited thereto.
Each of first electrode 102 and second electrode 104 can be described as anode or cathode.
First illumination region 110 may include that the first hole transmission layer (HTL) 112, first being located in first electrode 102 shines Layer (EML) 114 and the first electron transfer layer (ETL) 116.
First EML 114 may be configured with blue light-emitting layer.
Second illumination region 120 may include the 2nd HTL 122, the first EML 124 and the 2nd ETL126.
First EML 124 of the second illumination region 120 may be configured with yellow green luminescent layer.
The first charge generating layers (CGL) 140 can be further formed between the first illumination region 110 and the second illumination region 120. The adjustable charge balances between first illumination region 110 and the second illumination region 120 of first CGL 140.First CGL 140 may include N-type CGL and p-type CGL.
Third illumination region 130 may include being arranged the 3rd ETL 136, the first EML 134 and below second electrode 104 Three HTL 132.
First EML 134 of third illumination region 130 may be configured with blue light-emitting layer.
It can be further formed the 2nd CGL 150 between the second illumination region 120 and third illumination region 130.2nd CGL 150 Adjustable charge balance between second illumination region 120 and third illumination region 130.2nd CGL 150 may include N-type CGL and p-type CGL。
In this configuration, in the yellow green luminescent layer as the first EML 124 of the second illumination region 120, red color area Domain and green area should all shine, and due to this, the luminous efficiency of each of red area and green area reduces. Particularly because the luminous intensity of the red area as long wavelength region is relatively low, so red efficiency further decreases.
In addition, wherein the transmissivity of color layer (color layer) is the glow peak of maximum wavelength and yellowish green luminescent layer Value mismatches, and due to this, red efficiency and green efficiency reduce.
Moreover, in realizing red, green and blue white organic light emitting devices by using color layer, red color Purity reduces.This is because the luminous intensity for reducing the short wavelength range of excitation purity is more than the luminous intensity of long wavelength range, by In this reason, red excitation purity reduces.
Moreover, when in the structure of fig. 1 further setting include red light emitting layer illumination region to improve red efficiency when, Device thickness increases, and driving voltage is caused to increase.
Therefore, the present inventor has invented a kind of white with new construction (one of illumination region includes two luminescent layers) Organic light emitting apparatus is reduced with improving red efficiency and green efficiency and improving since red and green excitation purity reduces Color reproduction rate (or colour gamut).
Therefore, the present inventor has invented a kind of because setting has two hairs of different luminescence peaks in an illumination region Photosphere and with maximum luminous efficiency structure.
According to the present embodiment, in the organic light emitting apparatus including three illumination regions, at least one illumination region is configurable There are two luminescent layers including red light emitting layer, the two luminescent layers to may include blue light-emitting layer and red light emitting layer.In addition, three An illumination region in a illumination region may be configured with green light emitting layer.Selectively, in the organic light emission for including two illumination regions In device, at least one illumination region may be configured with two luminescent layers including red light emitting layer, the two luminescent layers may include indigo plant Color luminescent layer and red light emitting layer.In addition, by various experiments, inventor recognizes includes when at least one illumination region is configured with When two luminescent layers of red light emitting layer, the luminous intensity or color visual angle change rate (color viewing angle of luminescent layer Change rate) it is influenced by the position of red light emitting layer.Therefore, in the present embodiment, the position of red light emitting layer can be set It is set to, improves at least one of color visual angle change rate and red efficiency, green efficiency and blue efficiency.This will be with reference to Fig. 2 To 7 detailed descriptions.
Fig. 2 is the diagram for the luminous position for illustrating the luminescent layer according to second embodiment of the invention.
In fig. 2, horizontal axis indicates that the wave-length coverage (nm) of light, the longitudinal axis indicate to constitute the thickness of the organic layer of illumination region (nm).The thickness is not limit the scope of the invention.In addition, Fig. 2 can be described as contour map (contour map).
Fig. 2 is illustrated when it includes two luminescent layers of red light emitting layer that the first illumination region, which is configured with, red light emitting layer Position.
In fig. 2, the position for constituting the blue light-emitting layer of the first illumination region is indicated by B.The light-emitting zone of blue light-emitting layer Luminescence peak can be located at 440nm to 480nm in the range of, which is indicated by B wavelength.In addition, red light emitting layer shines The luminescence peak in region can be located in the range of 600nm to 650nm, which is indicated by R wavelength.
The position for constituting the red light emitting layer of the first illumination region can be the position for meeting B wave-length coverages and R wave-length coverages. Therefore, the position of red light emitting layer can be 1. position below the position B of blue light-emitting layer or can be blue light-emitting layer Position B above 2. position.
Moreover, the present inventor has checked when an illumination region includes blue light-emitting layer and red light emitting layer, relative to red The position of color luminescent layer and the luminous intensity and luminosity curve shown.This display is in figure 3.
In figure 3, horizontal axis indicates that the wave-length coverage (nm) of light, left side longitudinal axis indicate that luminous intensity, right side longitudinal axis indicate hair Light curve.Fig. 3 illustrates electroluminescent (EL) spectrum and luminosity curve.Luminous intensity can be represented as relative to EL spectrum The numerical value of the relative value of maximum value.
Fig. 3 is illustrated when the first illumination region is configured with red light emitting layer and blue light-emitting layer, below blue light-emitting layer 1. position and blue light-emitting layer above 2. position at, luminous intensity and luminosity curve of the red light emitting layer relative to wavelength Diagram.
As shown in Figure 3, it can be seen that arrived in the 600nm of the light emission peak range of the light-emitting zone as red light emitting layer In the range of 650nm, luminous intensity is compared at 2. position and is further increased at 1. position.
Indicate the luminosity curve at 1. position,Indicate the luminosity curve at 2. position.As shown, in the song that shines LineIn, it can be seen that luminous intensity is at 600nm to the 650nm of the luminescence peak of the light-emitting zone as red light emitting layer Increase.On the other hand, it can be seen that with luminosity curveIt compares, luminosity curveLuminous intensity at 600nm to 650nm It reduces.
Therefore, as corresponding to luminous intensity EL spectrum and luminosity curve as a result, it is possible to find out in the first illumination region In, the 2. position above blue light-emitting layer is more suitable for the position of red light emitting layer for apparatus structure.
It learns moreover, the present inventor checks, when an illumination region is configured with blue light-emitting layer and red light emitting layer, is based on The color visual angle change rate at visual angle is influenced by the position of red light emitting layer.This display is in Fig. 4.
In Fig. 4, horizontal axis indicates that visual angle, the longitudinal axis indicate color visual angle change rate " Δ u'v' ".As shown in Figure 4, from Color visual angle change rate is measured while the viewing apparatus of front at 0 degree, 15 degree, 30 degree, 45 degree and 60 degree.
Fig. 4 illustrates the configuration of the first illumination region, and there are two the situations of luminescent layer.As shown in Figure 4, it can be seen that based on regarding The color visual angle change rate " Δ u'v' " at angle is low at the 2. positions position Chu Bi①, thus the variation of white is smaller.For example, when regarding When angle is 60 degree, color visual angle change rate " Δ u'v' " is 0.0207 at 1. position, and color visual angle change rate " Δ u'v' " exists 2. being 0.0162 at position.That is, it can be seen that color visual angle change rate " Δ u'v' " is low at the 2. positions position Chu Bi①.
Therefore, as the color visual angle change rate " Δ u'v' " based on visual angle as a result, it is possible to find out in the first illumination region In 110, when red light emitting layer is set on blue light-emitting layer, color visual angle change rate " Δ u'v' " is low.Furthermore it is possible to see Go out, because the color visual angle change rate " Δ u'v' " based on visual angle is low, the color change of white is smaller.Furthermore it is possible to see Go out, because the color visual angle change rate " Δ u'v' " based on visual angle is low, prevents gamut, color visual angle change rate " Δ u' Influence very littles of the v' " to display quality.
Above with reference to as described in Fig. 2 to 4, the feelings for two luminescent layers for including red light emitting layer are configured in the first illumination region In shape, when blue light-emitting layer is arranged to than red light emitting layer closer to first electrode, color visual angle change rate and red effect At least one of rate, green efficiency and blue efficiency are improved.
Fig. 5 is illustrated according to third embodiment of the present invention, includes red light emitting layer when third illumination region is configured with When two luminescent layers, the position of red light emitting layer.
In Figure 5, horizontal axis indicates that the wave-length coverage (nm) of light, the longitudinal axis indicate to constitute the thickness of the organic layer of illumination region (nm).The thickness is not limit the scope of the invention.In addition, Fig. 5 can be described as contour map.
In Figure 5, the position of blue light-emitting layer is indicated by B.The luminescence peak of the light-emitting zone of blue light-emitting layer can be located at In the range of 440nm to 480nm, which is indicated by B wavelength.In addition, the luminescence peak of the light-emitting zone of red light emitting layer can In the range of 600nm to 650nm, which is indicated by R wavelength.
The position for constituting the red light emitting layer of third illumination region can be the position for meeting B wave-length coverages and R wave-length coverages. Therefore, the position of red light emitting layer can be 3. position below the position B of blue light-emitting layer or can be blue light-emitting layer Position B above 4. position.
Moreover, the present inventor has checked when an illumination region includes blue light-emitting layer and red light emitting layer, for red The position of luminescent layer and the luminous intensity and luminosity curve shown.This display is in figure 6.
In figure 6, horizontal axis indicates that the wave-length coverage (nm) of light, left side longitudinal axis indicate that luminous intensity, right side longitudinal axis indicate hair Light curve.Fig. 6 illustrates EL spectrum and luminosity curve.Luminous intensity can be the phase being represented as relative to EL spectral maximums To the numerical value of value.
Fig. 6 is illustrated when third illumination region is configured with red light emitting layer and blue light-emitting layer, below blue light-emitting layer 3. position and blue light-emitting layer above 4. position at, luminous intensity and luminosity curve of the red light emitting layer relative to wavelength Diagram.
As shown in Figure 6, it can be seen that arrived in the 600nm of the light emission peak range of the light-emitting zone as red light emitting layer In the range of 650nm, luminous intensity is compared at 4. position at 3. position and is further increased.
Indicate the luminosity curve at 3. position,Indicate the luminosity curve at 4. position.As shown, in the song that shines LineIn, it can be seen that luminous intensity is at 600nm to the 650nm of the luminescence peak of the light-emitting zone as red light emitting layer Increase.On the other hand, it can be seen that with luminosity curveIt compares, luminosity curveLuminous intensity at 600nm to 650nm It reduces.
Therefore, as luminous intensity and luminosity curve as a result, it is possible to find out in third illumination region, under blue light-emitting layer The 3. position of side is more suitable for the position of red light emitting layer for apparatus structure.
It learns when an illumination region is configured with blue light-emitting layer and red light emitting layer, is based on moreover, the present inventor checks The color visual angle change rate at visual angle is influenced by the position of red light emitting layer.This display is in the figure 7.
In the figure 7, horizontal axis indicates that visual angle, the longitudinal axis indicate color visual angle change rate " Δ u'v' ".As shown in Figure 7, from Color visual angle change rate is measured while the viewing apparatus of front at 0 degree, 15 degree, 30 degree, 45 degree and 60 degree.
Fig. 7 illustrates the configuration of third illumination region, and there are two the situations of luminescent layer.As shown in Figure 7, it can be seen that based on regarding The color visual angle change rate " Δ u'v' " at angle is low at the 3. positions position Chu Bi④, thus the variation of white is smaller.For example, when regarding When angle is 60 degree, color visual angle change rate " Δ u'v' " is 0.0167 at 3. position, and color visual angle change rate " Δ u'v' " exists 4. being 0.0224 at position.That is, it can be seen that color visual angle change rate " Δ u'v' " is low at the 3. positions position Chu Bi④.
Therefore, as the color visual angle change rate " Δ u'v' " based on visual angle as a result, it is possible to find out in third illumination region In 130, when red light emitting layer is set to below blue light-emitting layer, color visual angle change rate " Δ u'v' " is low.Furthermore it is possible to see Go out, because the color visual angle change rate " Δ u'v' " based on visual angle is low, the color change of white is smaller.Furthermore it is possible to see Go out, because the color visual angle change rate " Δ u'v' " based on visual angle is low, prevents gamut, color visual angle change rate " Δ u' Influence very littles of the v' " to display quality.
Above with reference to as described in Fig. 5 to 7, the feelings for two luminescent layers for including red light emitting layer are configured in third illumination region In shape, when blue light-emitting layer is arranged to than red light emitting layer closer to second electrode, luminous intensity increases, thus color visual angle At least one of change rate and red efficiency, green efficiency and blue efficiency are improved.
Above with reference to as described in Fig. 2 to 7, when there are two luminescent layers (for example, blue light-emitting layer and red for an illumination region configuration Color luminescent layer) when, the position of the first illumination region of inspected or blue light-emitting layer and red light emitting layer in third illumination region or Sequentially.When there are two when luminescent layer for an illumination region configuration, it can be seen that it is contemplated that the light-emitting zone of luminescent layer shines The position of two luminescent layers is arranged in curve, the luminous intensity of luminescent layer and color visual angle change rate based on visual angle.
In addition, the white that one of illumination region includes two luminescent layers is described in detail hereinafter with reference to following embodiments Organic light emitting apparatus.
Fig. 8 is the diagram for illustrating the white organic light emitting device 200 according to the 4th embodiment of the invention.
White organic light emitting device 200 shown in fig. 8 include substrate 201, the first and second electrodes 202 and 204 and The first illumination region 210, the second illumination region 220 between the first and second electrodes 202 and 204 and third illumination region 230.
Substrate 201 can be formed by insulating materials or with material flexible.Substrate 201 can be by glass, metal or plastics shape At but it is not limited to this.When oganic light-emitting display device is flexible oganic light-emitting display device, substrate 201 can be by such as moulding The flexible material of material etc is formed.
First electrode 202 is to provide the anode in hole, and can be by as the saturating of such as transparent conductive oxide (TCO) etc Tin indium oxide (ITO) or indium zinc oxide (IZO) formation of bright conductive material.However, present embodiment is without being limited thereto.
Second electrode 204 is to provide the cathode of electronics, and can by as metal material gold (Au), silver-colored (Ag), aluminium (Al), Molybdenum (Mo) or magnesium (Mg) formation, or can be formed by their alloy.However, present embodiment is without being limited thereto.
Each of first electrode 202 and second electrode 204 can be described as anode or cathode.
First illumination region 210 may include the first HTL 212, the first EML 214 and first that are located in first electrode 202 ETL 216。
Although being not shown, HIL can be further formed in first electrode 202.What HIL made to provide from first electrode 202 Hole can smoothly be injected.The hole provided from HIL can be supplied to the first EML 214 by the first HTL 212.First ETL 216 The electronics provided from the first CGL 240 can be supplied to the first EML 214.
HIL can be by 4,4', 4 "-three (3- toluene phenylamino) triphenylamines (MTDATA), CuPc (CuPc), poly- (3,4- second Alkene dioxy thiophene, poly styrene sulfonate (PEDOT/PSS) formation, but it is not limited to this.
It can be recombinated in the first EML214 via the holes provided HIL and via the first ETL 216 electronics provided, to It shines.
First HTL 212 can be formed by two or more layers or two or more materials.First HTL 212 can be by NPD (bis- (the phenyl) -2,2'- dimethylbenzidines of bis- (naphthalene -1- the bases)-N, N'- of N, N'-), TPD (N, N'- be bis--(3- methylbenzenes Base)-N, N'- is bis--(phenyl)-benzidine) and spiral shell (Spiro)-TAD (2,2', 7,7'- tetra- (N, N- diphenylamino) -9,9'- Spiro fluorene) at least one of formed, but it is not limited to this.
First ETL 216 can be formed by two or more layers or two or more materials.First ETL 216 can be by PBD (2- (4- xenyls) -5- (4- tert-butyls phenyl) -1,3,4- oxadiazoles), TAZ (3- (4- xenyls) -4- phenyl -5- Tert-butyl phenyl -1,2,4- triazoles), BALq (bis- (2- methyl -8-hydroxyquinoline) -4- (phenylphenol) aluminium), Liq (8- hydroxyls Quinoline-lithium) and TPBi (formation of at least one of 1,3,5- tri- (1- phenyl -1-H- benzimidazolyl-2 radicals-yl) benzene, but not It is limited to this.
Hole blocking layer (HBL) can be further formed on the first EML 214.HBL prevents from being injected into the first EML 214 Hole transport thus improve first to the first ETL 216 so as to improve combination of the electrons and holes in the first EML 214 The luminous efficiency of EML 214.First ETL 216 and HBL can be used as one layer or single layer provides.
Electronic barrier layer (EBL) can be further formed below the first EML 214.EBL prevents from being injected into the first EML 214 In electron-transport thus improve to the first HTL 212 so as to improve combination of the electrons and holes in the first EML 214 The luminous efficiency of one EML 214.First HTL212 and EBL can be used as one layer or single layer provides.
Second illumination region 220 may include the 2nd HTL 222, the first EML 224 and the 2nd ETL226.
Although being not shown, EIL can be further formed on the 2nd ETL 226.In addition, HIL can be further formed.
2nd HTL 222 can be formed by material identical with the first HTL 212, and but it is not limited to this.
2nd HTL 222 can be formed by two or more layers or two or more materials.
2nd ETL 226 can be formed by material identical with the first ETL 216, and but it is not limited to this.
2nd ETL 226 can be formed by two or more layers or two or more materials.
It can be further formed HBL on the first EML 224.HBL prevents the hole transport being injected into the first EML 224 from arriving Thus 2nd ETL 226 improves shining for the first EML 224 so as to improve combination of the electrons and holes in the first EML 224 Efficiency.2nd ETL 226 and HBL can be used as one layer or single layer provides.
It can be further formed EBL below the first EML 224.EBL prevents the electron-transport being injected into the first EML224 To the 2nd HTL 222, so as to improve combination of the electrons and holes in the first EML 224, the hair of the first EML 224 is thus improved Light efficiency.2nd HTL 222 and EBL can be used as one layer or single layer provides.
It can be further formed the first CGL 240 between the first illumination region 210 and the second illumination region 220.First CGL 240 Adjustable charge balance between first illumination region 210 and the second illumination region 220.First CGL 240 may include N-type CGL and p-type CGL。
N-type CGL can be by alkali metal wherein doped with such as lithium (Li), sodium (Na), potassium (K) or caesium (Cs) etc or all If the organic layer of the alkaline-earth metal of magnesium (Mg), strontium (Sr), barium (Ba) or radium (Ra) etc is formed, but it is not limited to this.
P-type CGL can be formed by the organic layer comprising P-type dopant, and but it is not limited to this.
First CGL 240 can be formed by single layer.
Third illumination region 230 may include being arranged the 3rd ETL 236, the first EML 234 and below second electrode 204 Three HTL 232.
Although being not shown, EIL can be further formed on the 3rd ETL 236.In addition, HIL can be further formed.
3rd HTL 232 can be by TPD (N, N'- be bis--(3- aminomethyl phenyls)-N, N'- be bis--(phenyl)-benzidine) or NPB (bis- (the phenyl)-benzidine of bis- (naphthalene -1- the bases)-N, N'- of N, N'-) are formed, and but it is not limited to this.
3rd HTL 232 can be formed by two or more layers or two or more materials.
3rd ETL 236 can be formed by oxadiazoles, phenanthroline, benzoxazoles or benzothiazole, and but it is not limited to this.
3rd ETL 236 can be formed by two or more layers or two or more materials.
It can be further formed HBL on the first EML 234.HBL prevents the hole transport being injected into the first EML 234 from arriving Thus 3rd ETL 236 improves shining for the first EML 234 so as to improve combination of the electrons and holes in the first EML 234 Efficiency.3rd ETL 236 and HBL can be used as one layer or single layer provides.
It can be further formed EBL below the first EML 234.EBL prevents the electron-transport being injected into the first EML234 To the 3rd HTL 232, so as to improve combination of the electrons and holes in the first EML 234, the hair of the first EML 234 is thus improved Light efficiency.3rd HTL 232 and EBL can be used as one layer or single layer provides.
It can be further formed the 2nd CGL 250 between the second illumination region 220 and third illumination region 230.2nd CGL 250 Adjustable charge balance between second illumination region 220 and third illumination region 230.2nd CGL 250 may include N-type CGL and p-type CGL。
N-type CGL can inject electronics into the second illumination region 220, and p-type CGL can inject hole into third illumination region 230.
N-type CGL can be by alkali metal wherein doped with such as lithium (Li), sodium (Na), potassium (K) or caesium (Cs) etc or all If the organic layer of the alkaline-earth metal of magnesium (Mg), strontium (Sr), barium (Ba) or radium (Ra) etc is formed, but it is not limited to this.
P-type CGL can be formed by the organic layer comprising P-type dopant, and but it is not limited to this.First CGL 240 can be by with The identical material of N-type CGL and p-type CGL of two CGL 250 is formed, and but it is not limited to this.2nd CGL 250 can be by single layer shape At.
First EML 214 of the first illumination region 210 is formed as blue light-emitting layer, and the 2nd EML 215 is formed as red Luminescent layer.Above with reference to as described in Fig. 2 to 7, it is contemplated that luminous intensity or luminosity curve and color visual angle change rate, further Red light emitting layer 215 included in the first illumination region 210 may be provided on blue light-emitting layer 214.Therefore, as the first EML 214 blue light-emitting layer can be set to than the red light emitting layer as the second EML 215 closer to first electrode 202, to change At least one of kind color visual angle change rate and red efficiency, green efficiency and blue efficiency.
In addition to blue light-emitting layer, the first EML 214 of the first illumination region 210 may also be formed as navy blue luminescent layer or day Blue light-emitting layer.
The luminescence peak of the light-emitting zone of blue light-emitting layer as the first EML 214 can be located at the model of 440nm to 480nm In enclosing.In addition, the luminescence peak of the light-emitting zone of red light emitting layer as the 2nd EML 215 can be positioned at 600nm to 650nm's In range.Therefore, the luminescence peak of the light-emitting zone of the first illumination region 210 can be located in the range of 440nm to 650nm.
First EML 224 of the second illumination region 220 is formed as green light emitting layer.The light-emitting zone of first EML 224 Luminescence peak can be located in the range of 510nm to 570nm.
When using green light emitting layer when, it is different from yellow green luminescent layer, it can be achieved that have short wavelength green color wavelength range, Thus prevent leads to color mixing due to overlapping between red wavelength range and yellow green wave-length coverage, it is therefore prevented that red The excitation purity of each is reduced due to color mixing with green.
Selectively, the first EML 224 of the second illumination region 220 is formed as blue light-emitting layer.Except blue light-emitting layer it Outside, the first EML 224 may also be formed as navy blue luminescent layer or sky blue luminescent layer.
First EML 234 of third illumination region 230 is formed as blue light-emitting layer.In addition to blue light-emitting layer, the first EML 234 may also be formed as navy blue luminescent layer or sky blue luminescent layer.The luminescence peak of the light-emitting zone of first EML234 can be located at In the range of 440nm to 480nm.Selectively, the first EML 234 of third illumination region 230 is formed as green light emitting layer.
When the first EML 234 of third illumination region 230 is formed as blue light-emitting layer, the first EML of the second illumination region 220 224 are formed as green light emitting layer.In this case, the second illumination region 220 can have and be located in 510nm to 570nm ranges Luminescence peak, third illumination region 230 can have be located at 440nm to 480nm ranges in luminescence peak.
Selectively, when the first EML 234 of third illumination region 230 is formed as green light emitting layer, the second illumination region 220 The first EML 224 be formed as blue light-emitting layer.In this case, the second illumination region 220 can have and be arrived positioned at 440nm Luminescence peak within the scope of 480nm, third illumination region 230 can have the luminescence peak being located in 510nm to 570nm ranges.
Therefore, had according to the white organic light emitting device of the 4th embodiment of the invention and show three luminescence peaks Structure, wherein the first illumination region may be configured with red light emitting layer and blue light-emitting layer, to improve the efficiency of red light emitting layer； Second illumination region may be configured with green light emitting layer, to improve the efficiency of green light emitting layer；Third illumination region may be configured with blue Luminescent layer.That is there is white organic light emitting device-three luminescence peak of three light-emitting zones (TER-TEP) structure, this structure to be Has the structure there are three luminescence peak based on three illumination regions.Therefore, according to the present embodiment, tied by application TER-TEP Structure improves luminous efficiency, excitation purity and color reproduction rate or color visual angle.In addition, oganic light-emitting display device is most of bright Degree from green obtain, thus when the 2nd EML configuration there are one luminescent layer (i.e. green light emitting layer) when, further improved The brightness of machine light-emitting display apparatus.
Here, because the first illumination region is configured with blue light-emitting layer and red light emitting layer, blue light-emitting layer shines The luminescence peak in region is located in the range of 440nm to 480nm, and the luminescence peak of the light-emitting zone of red light emitting layer is located at In the range of 600nm to 650nm.In addition, because the second illumination region is configured with green light emitting layer, green light emitting layer shines The luminescence peak in region is located in the range of 510nm to 570nm.In addition, because third illumination region is configured with blue light-emitting layer, institute It is located in the range of 440nm to 480nm with the luminescence peak of the light-emitting zone of blue light-emitting layer.Therefore, because first and third Each of illumination region is configured with blue light-emitting layer, so the luminescence peak of blue light-emitting layer is rendered as at 440nm to 480nm One luminescence peak, thus, since first arrives third illumination region, realizing tool, there are three the TER-TEP structures of illumination region.
Selectively, because the first illumination region is configured with blue light-emitting layer and red light emitting layer, blue light-emitting layer The luminescence peak of light-emitting zone is located in the range of 440nm to 480nm, and the luminescence peak position of the light-emitting zone of red light emitting layer In the range of 600nm to 650nm.In addition, because the second illumination region is configured with green light emitting layer, the hair of green light emitting layer The luminescence peak in light region is located in the range of 510nm to 570nm.In addition, because third illumination region is configured with blue light-emitting layer, So the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because first and Each of three illumination regions is configured with blue light-emitting layer, so the luminescence peak of blue light-emitting layer is presented at 440nm to 480nm Two different glow peaks are rendered as at 440nm to 480nm for the luminescence peak of two luminescence peaks or blue light-emitting layer Value.Therefore, because first arrives third illumination region, four luminescence peaks are provided.That is due to three illumination regions, TER-TEP Structure includes that there are four the structures of luminescence peak for tool.
Bottom emission type is can be applied to according to the white organic light emitting device of the 4th embodiment of the invention, but and unlimited In this.Top emission type or dual-side emissive are can be applied to according to the white organic light emitting device of the 4th embodiment of the invention Type.In top emission type or dual-side emissive type, the position of luminescent layer can be changed according to the characteristic or structure of device.Institute as above It states, when setting includes two luminescent layers of red light emitting layer, the luminous intensity or color visual angle change rate of luminescent layer are by red The position of luminescent layer influences.Therefore, in the white organic light emitting device of the present invention, luminous intensity or face that can be based on luminescent layer The position of red light emitting layer is arranged in color visual angle change rate, so as to improve color visual angle change rate and red efficiency, green efficiency At least one of with blue efficiency.
In including the oganic light-emitting display device according to the white organic light emitting device of 4th embodiment of the invention, Can be arranged on substrate 201 by it is intersected with each other come limit respectively multiple pixel regions a plurality of grid line and multiple data lines, And a plurality of power cord extended in parallel with grid line or data line, it can be arranged in each of multiple pixel regions and corresponding Grid line and the corresponding data line switching thin-film transistor (TFT) connected and the driving TFT being connect with switch TFT.Drive TFT It can be connect with first electrode 202.
Fig. 9 is the diagram for the luminous position for illustrating the luminescent layer according to the 4th embodiment of the invention.
In fig.9, horizontal axis indicates that the wave-length coverage (nm) of light, the longitudinal axis indicate to constitute the thickness of the organic layer of illumination region (nm).The thickness is not limit the scope of the invention.In addition, Fig. 9 can be described as contour map.
Fig. 9 illustrates the red hair being set to when the first illumination region 210 is configured with red light emitting layer on blue light-emitting layer Photosphere.In fig.9, blue light-emitting layer is indicated by B, and red light emitting layer is indicated by R.In addition to blue light-emitting layer, the first illumination region 210 may be configured with navy blue luminescent layer or sky blue luminescent layer.
As shown in Figure 9, when with 440nm to 480nm (B wavelength), the i.e. luminescence peak of the light-emitting zone of blue light-emitting layer With with 600nm to 650nm (R wavelength), i.e., the luminescence peak transmitting light of the light-emitting zone of red light emitting layer when, in contour map Maximal efficiency is obtained in white area.Accordingly, it can be seen that when red light emitting layer is set on blue light-emitting layer, with B wavelength With R wavelength, that is, it is expected that the luminescence peak of light-emitting zone emits light.
Figure 10 is to illustrate shining according to the white organic light emitting device of the 4th embodiment of the invention and comparative example The diagram of intensity.
In Fig. 10, horizontal axis indicates that the wave-length coverage (nm) of light, the longitudinal axis indicate luminous intensity.Luminous intensity can be by table It is shown as the numerical value of the relative value relative to EL spectral maximums.
In Fig. 10, in a comparative example, the first EML of the first illumination region may be configured with blue light-emitting layer, the second illumination region The first EML may be configured with yellow green luminescent layer, the first EML of third illumination region may be configured with blue light-emitting layer.
In embodiment 4, as shown in Figure 8, the first EML 214 of the first illumination region 210 may be configured with blue-light-emitting Layer, and the red light emitting layer of the 2nd EML 215 can be provided as on blue light-emitting layer.First illumination region 210 may include first EML 214, other than blue light-emitting layer, the first EML 214 may be configured with navy blue luminescent layer or sky blue luminescent layer.
Moreover, the first EML 224 of the second illumination region 220 may be configured with green light emitting layer, the first of third illumination region 230 EML 234 may be configured with blue light-emitting layer.Third illumination region 230 may include the first EML 234, other than blue light-emitting layer, First EML 234 may be configured with navy blue luminescent layer or sky blue luminescent layer.When the first EML 234 is configured with navy blue luminescent layer When, compared with blue light-emitting layer or sky blue luminescent layer, the excitation purity of the first EML 234 further increases.
In Fig. 10, comparative example is illustrated by fine line, embodiment 4 is illustrated by heavy line.In addition, by green colored The curve that layer (CL) illustrates shows that the transmissivity of wherein green color layer is maximum wavelength, by red color chromatograph (CL) figure The curve shown shows that the transmissivity of wherein red color chromatograph is maximum wavelength.
As shown in Figure 10, in a comparative example, it can be seen that in 440nm to 480nm, the i.e. light-emitting zone of blue light-emitting layer Luminescence peak at show luminous intensity；And in 540nm to 580nm, i.e., the light-emitting zone of yellow green luminescent layer is luminous Luminous intensity is shown at peak value.
In a comparative example, wherein the transmissivity of green color layer is the light-emitting zone of maximum wavelength and yellow green luminescent layer Luminescence peak wavelength mismatch.Therefore, red efficiency and green efficiency reduce.Further, it can be seen that with 4 phase of embodiment Than luminous intensity reduces in indicating the wave-length coverage of transmissivity of green color layer.
Therefore, in a comparative example, because yellow green wave-length coverage is overlapping with red wavelength range, color mixing, because And desired green difficult to realize and red.Due to this, it is difficult to realize desired white organic light emitting device.In addition, In comparative example, it can be seen that the luminous intensity of red light emitting layer is relatively low, thus red light emitting layer is less efficient.
Moreover, in a comparative example, the yellow green and indigo plant corresponding to two luminescence peaks are only shown in three illumination regions Color, and yellow green should realize red and green, and the red and green excitation purity of each is caused to reduce.Due to this, very Hardly possible realizes desired white organic light emitting device.
In embodiment 4, it can be seen that in 440nm to 480nm, the i.e. luminescence peak of the light-emitting zone of blue light-emitting layer Place shows luminous intensity；In 510nm to 570nm, i.e., shown at the luminescence peak of the light-emitting zone of green light emitting layer Luminous intensity；And in 600nm to 650nm, i.e., show luminous intensity at the luminescence peak of the light-emitting zone of red light emitting layer. That is, it can be seen that present three luminescence peaks.In addition, because further setting red light emitting layer, red are sent out The luminous intensity of photosphere increases, thus improves red efficiency and red excitation purity.Here, due to first and third illumination region The luminescence peak of the blue light-emitting layer for including in each, blue light-emitting layer is rendered as two glow peaks at 440nm to 480nm The luminescence peak of value or blue light-emitting layer is shown as two different luminescence peaks at 440nm to 480nm.Therefore, it presents Go out four luminescence peaks.
In addition, because in 510nm to 570nm, i.e., shown at the luminescence peak of the light-emitting zone of green light emitting layer luminous Intensity so only realizing the green with short wavelength range, thus further improves excitation purity compared with yellow green.Compared with Example is compared, and in the curve illustrated by green color layer, the transmissivity of embodiment 4 close to wherein green color layer is most Big wave-length coverage, thus show not with other colour-mixed greens.Therefore, the luminous efficiency of green light emitting layer is wherein The transmissivity of green color layer is higher at maximum wave-length coverage, thus green efficiency improves.
Moreover, the excitation purity raising of each of red and green, thus DCI coverage rates (coverage) increase.Therefore, it carries It has supplied for showing apparent and photorealism large size TV (TV).Here, DCI coverage rates can be described as DCI color spaces Satisfaction.
Moreover, in embodiment 4, it can be seen that the luminous intensity of red light emitting layer increases.By red color chromatograph figure In the curve shown, it can be seen that compared with comparative example, the luminous intensity of embodiment 4 is in the region of red color chromatograph into one Step increases.
Therefore, in embodiment 4, it can be seen that the luminous intensity increase of each of red and green, thus red effect Rate and green efficiency increase.
Moreover, in embodiment 4, the red corresponding to three luminescence peaks, green are shown in three illumination regions At least one of and blue wavelength, thus improve red efficiency, green efficiency and blue efficiency, and improve excitation purity and color Recall factor or color visual angle.Here, due to first and the third illumination region blue light-emitting layer that includes in each, blue light-emitting layer Luminescence peak the luminescence peak of two luminescence peaks or blue light-emitting layer is rendered as at 440nm to 480nm in 440nm Two different luminescence peaks are rendered as at 480nm.Therefore, four luminescence peaks are showed.
Figure 11 is the diagram for illustrating the white organic light emitting device 300 according to the 5th embodiment of the invention.It is describing When present embodiment, the description of pair identical as the element according to aforementioned embodiments or corresponding element is not repeated.
White organic light emitting device 300 shown in Figure 11 include substrate 301, the first and second electrodes 302 and 304, with And first between the first and second electrodes 302 and 304 arrives third illumination region 310,320 and 330.
First EML 314 of the first illumination region 310 is formed as blue light-emitting layer.In addition to blue light-emitting layer, the first EML 314 are formed as navy blue luminescent layer or sky blue luminescent layer.The luminescence peak of the light-emitting zone of first EML314 can be located at In the range of 440nm to 480nm.Selectively, the first EML 314 is formed as green light emitting layer.In this case, first The luminescence peak of the light-emitting zone of EML 314 can be located in the range of 510nm to 570nm.
First EML 324 of the second illumination region 320 is formed as green light emitting layer.The light-emitting zone of first EML 324 Luminescence peak can be located in the range of 510nm to 570nm.
When using green light emitting layer when, it is different from yellow green luminescent layer, it can be achieved that have short wavelength green color wavelength range, Thus prevent leads to color mixing due to overlapping between red wavelength range and yellow green wave-length coverage, it is therefore prevented that red The excitation purity of each is reduced due to color mixing with green.
Selectively, the first EML 324 is formed as blue light-emitting layer.In addition to blue light-emitting layer, the first EML 324 can Be formed as navy blue luminescent layer or sky blue luminescent layer.In this case, the luminescence peak of the light-emitting zone of the first EML 324 It can be located in the range of 440nm to 480nm.
When the first EML 314 of the first illumination region 310 is formed as blue light-emitting layer, the first EML of the second illumination region 320 324 are formed as green light emitting layer.In this case, the first illumination region 310 can have and be located in 440nm to 480nm ranges Luminescence peak, the second illumination region 320 can have be located at 510nm to 570nm ranges in luminescence peak.
First EML 334 of third illumination region 330 is formed as red light emitting layer, and the 2nd EML 335 is formed as blue Luminescent layer.The red light emitting layer above with reference to as described in Fig. 2 to 7, being further contained in third illumination region 330 may be provided at indigo plant Below color luminescent layer.Therefore, the blue light-emitting layer as the 2nd EML 335 can be set to than the red as the first EML 334 Luminescent layer is closer to second electrode 304, so as to improve color visual angle change rate and red efficiency, green efficiency and blue effect At least one of rate.
In addition to blue light-emitting layer, the 2nd EML 335 of third illumination region 330 is formed as navy blue luminescent layer or sky blue Color luminescent layer.
The luminescence peak of the light-emitting zone of red light emitting layer as the first EML 334 can be located at the model of 600nm to 650nm In enclosing.In addition, the luminescence peak of the light-emitting zone of blue light-emitting layer as the 2nd EML 335 can be positioned at 440nm to 480nm's In range.Therefore, the luminescence peak of the light-emitting zone of third illumination region 330 can be located in the range of 440nm to 650nm.
Therefore, had according to the white organic light emitting device of the 5th embodiment of the invention and show three luminescence peaks Structure, wherein the first illumination region may be configured with blue light-emitting layer, the second illumination region may be configured with green light emitting layer to improve The efficiency of green light emitting layer, third illumination region may be configured with red light emitting layer to improve the efficiency of red light emitting layer.That is It is to have the knot there are three luminescence peak based on three illumination regions that white organic light emitting device, which has TER-TEP structures, this structure, Structure.Therefore, according to the present embodiment, pass through application TER-TEP structural improvements luminous efficiency, excitation purity and color reproduction rate or face Color visual angle.In addition, most of brightness of oganic light-emitting display device is obtained from green, thus when the 2nd EML is configured with When one luminescent layer (i.e. green light emitting layer), the brightness of oganic light-emitting display device is further improved.
Here, because the first illumination region is configured with blue light-emitting layer, the glow peak of the light-emitting zone of blue light-emitting layer Value is located in the range of 440nm to 480nm.In addition, because the second illumination region is configured with green light emitting layer, green light emitting layer The luminescence peak of light-emitting zone be located in the range of 510nm to 570nm.In addition, because third illumination region is sent out configured with red Photosphere and blue light-emitting layer, so the luminescence peak of the light-emitting zone of red light emitting layer is located in the range of 600nm to 650nm, And the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because first and third Each of illumination region is configured with blue light-emitting layer, so the luminescence peak of blue light-emitting layer is rendered as at 440nm to 480nm One luminescence peak, thus, since first arrives third illumination region, realizing tool, there are three the TER-TEP structures of luminescence peak.
Selectively, because the first illumination region is configured with green light emitting layer, the hair of the light-emitting zone of green light emitting layer Photopeak value is located in the range of 510nm to 570nm.In addition, because the second illumination region is configured with blue light-emitting layer, blue hair The luminescence peak of the light-emitting zone of photosphere is located in the range of 440nm to 480nm.In addition, because third illumination region is configured with red Color luminescent layer and blue light-emitting layer, so the luminescence peak of the light-emitting zone of red light emitting layer is located at the range of 600nm to 650nm It is interior, and the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because second and Each of three illumination regions is configured with blue light-emitting layer, so the luminescence peak of blue light-emitting layer is presented at 440nm to 480nm For a luminescence peak, thus since first arrives third illumination region, realizing tool, there are three the TER-TEP structures of luminescence peak.
Selectively, because the first illumination region is configured with blue light-emitting layer, the hair of the light-emitting zone of blue light-emitting layer Photopeak value is located in the range of 440nm to 480nm.In addition, because the second illumination region is configured with green light emitting layer, green hair The luminescence peak of the light-emitting zone of photosphere is located in the range of 510nm to 570nm.In addition, because third illumination region is configured with red Color luminescent layer and blue light-emitting layer, so the luminescence peak of the light-emitting zone of red light emitting layer is located at the range of 600nm to 650nm It is interior, and the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because first and Each of three illumination regions is configured with blue light-emitting layer, so the luminescence peak of blue light-emitting layer is presented at 440nm to 480nm Two different glow peaks are rendered as at 440nm to 480nm for the luminescence peak of two luminescence peaks or blue light-emitting layer Value.Therefore, because first arrives third illumination region, four luminescence peaks are provided.That is due to three illumination regions, TER-TEP Structure includes that there are four the structures of luminescence peak for tool.
Selectively, because the first illumination region is configured with green light emitting layer, the hair of the light-emitting zone of green light emitting layer Photopeak value is located in the range of 510nm to 570nm.In addition, because the second illumination region is configured with blue light-emitting layer, blue hair The luminescence peak of the light-emitting zone of photosphere is located in the range of 440nm to 480nm.In addition, because third illumination region is configured with red Color luminescent layer and blue light-emitting layer, so the luminescence peak of the light-emitting zone of red light emitting layer is located at the range of 600nm to 650nm It is interior, and the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because second and Each of three illumination regions is configured with blue light-emitting layer, so the luminescence peak of blue light-emitting layer is presented at 440nm to 480nm Two different glow peaks are rendered as at 440nm to 480nm for the luminescence peak of two luminescence peaks or blue light-emitting layer Value.Therefore, because first arrives third illumination region, four luminescence peaks are provided.That is due to three illumination regions, TER-TEP Structure includes that there are four the structures of luminescence peak for tool.
Bottom emission type is can be applied to according to the white organic light emitting device of the 5th embodiment of the invention, but and unlimited In this.Top emission type or dual-side emissive are can be applied to according to the white organic light emitting device of the 5th embodiment of the invention Type.In top emission type or dual-side emissive type, the position of luminescent layer can be changed according to the characteristic or structure of device.Institute as above It states, when setting includes two luminescent layers of red light emitting layer, the luminous intensity or color visual angle change rate of luminescent layer are by red The position of luminescent layer influences.Therefore, in the white organic light emitting device of the present invention, luminous intensity or face that can be based on luminescent layer The position of red light emitting layer is arranged in color visual angle change rate, so as to improve color visual angle change rate and red efficiency, green efficiency At least one of with blue efficiency.
In including the oganic light-emitting display device according to the white organic light emitting device of 5th embodiment of the invention, Can be arranged on substrate 301 by it is intersected with each other come limit respectively multiple pixel regions a plurality of grid line and multiple data lines, And a plurality of power cord extended in parallel with grid line or data line, it can be arranged in each of multiple pixel regions and corresponding Grid line and the corresponding data line switching thin-film transistor (TFT) connected and the driving TFT being connect with switch TFT.Drive TFT It can be connect with first electrode 302.
Figure 12 is the diagram for the luminous position for illustrating the luminescent layer according to the 5th embodiment of the invention.
In fig. 12, horizontal axis indicates that the wave-length coverage (nm) of light, the longitudinal axis indicate to constitute the thickness of the organic layer of illumination region (nm).The thickness is not limit the scope of the invention.In addition, Figure 12 can be described as contour map.
Figure 12 illustrates the red being set to when third illumination region 330 is configured with red light emitting layer below blue light-emitting layer Luminescent layer.In fig. 12, blue light-emitting layer is indicated by B, and red light emitting layer is indicated by R.In addition to blue light-emitting layer, third shines Portion 330 may be configured with navy blue luminescent layer or sky blue luminescent layer.
As shown in Figure 12, when with 440nm to 480nm (B wavelength), the i.e. luminescence peak of the light-emitting zone of blue light-emitting layer With with 600nm to 650nm (R wavelength), i.e., the luminescence peak transmitting light of the light-emitting zone of red light emitting layer when, in contour map Maximal efficiency is obtained in white area.Accordingly, it can be seen that when red light emitting layer is arranged below blue light-emitting layer, with B waves Long and R wavelength it is expected that the luminescence peak of light-emitting zone emits light.
Figure 13 is to illustrate shining according to the white organic light emitting device of the 5th embodiment of the invention and comparative example The diagram of intensity.
In fig. 13, horizontal axis indicates that the wave-length coverage (nm) of light, the longitudinal axis indicate luminous intensity.Luminous intensity can be by table It is shown as the numerical value of the relative value relative to EL spectral maximums.
In fig. 13, comparative example is illustrated by fine line, embodiment 5 is illustrated by heavy line.In addition, by green colored The curve that layer (CL) illustrates shows that the transmissivity of wherein green color layer is maximum wavelength, by red color chromatograph (CL) figure The curve shown shows that the transmissivity of wherein red color chromatograph is maximum wavelength.
In fig. 13, in a comparative example, the first EML of the first illumination region may be configured with blue light-emitting layer, the second illumination region The first EML may be configured with yellow green luminescent layer, the first EML of third illumination region may be configured with blue light-emitting layer.
In embodiment 5, as shown in Figure 11, the first EML 314 of the first illumination region 310 may be configured with blue-light-emitting Layer, the first EML 324 of the second illumination region 320 may be configured with green light emitting layer.First illumination region 310 may include the first EML 314, other than blue light-emitting layer, the first EML 314 may be configured with navy blue luminescent layer or sky blue luminescent layer.
It can be provided as the red light emitting layer of the first EML 334 of third illumination region 330 and the indigo plant as the 2nd EML 335 Color luminescent layer, and blue light-emitting layer may be disposed on red light emitting layer.Other than blue light-emitting layer, the 2nd EML 335 can shape As navy blue luminescent layer or sky blue luminescent layer.
As shown in Figure 13, in a comparative example, it can be seen that in 440nm to 480nm, the i.e. light-emitting zone of blue light-emitting layer Luminescence peak at show luminous intensity, and in 540nm to 580nm, i.e. the light-emitting zone of yellow green luminescent layer shines Luminous intensity is shown at peak value.In a comparative example, wherein the transmissivity of green color layer is maximum wavelength and yellow green The wavelength of the luminescence peak of the light-emitting zone of luminescent layer mismatches.Therefore, red efficiency and green efficiency reduce.Furthermore it is possible to Find out compared with embodiment 5, luminous intensity reduces in indicating the wave-length coverage of transmissivity of green color layer.
Therefore, in a comparative example, because yellow green wave-length coverage is overlapping with red wavelength range, color mixing, because And desired green difficult to realize and red.Due to this, it is difficult to realize desired white organic light emitting device.In addition, In comparative example, it can be seen that the luminous intensity of red light emitting layer is relatively low, thus red light emitting layer is less efficient.
Moreover, in a comparative example, the yellow green and indigo plant corresponding to two luminescence peaks are only shown in three illumination regions Color, and yellow green should realize red and green, and the red and green excitation purity of each is caused to reduce.Due to this, very Hardly possible realizes desired white organic light emitting device.
In embodiment 5, it can be seen that in 440nm to 480nm, the i.e. luminescence peak of the light-emitting zone of blue light-emitting layer Place shows luminous intensity；In 510nm to 570nm, i.e., shown at the luminescence peak of the light-emitting zone of green light emitting layer Luminous intensity；And in 600nm to 650nm, i.e., show luminous intensity at the luminescence peak of the light-emitting zone of red light emitting layer. That is, it can be seen that present three luminescence peaks.In addition, because further setting red light emitting layer, red are sent out The luminous intensity of photosphere increases, thus improves red efficiency and red excitation purity.Here, due to first and third illumination region The luminescence peak of the blue light-emitting layer for including in each, blue light-emitting layer is rendered as two glow peaks at 440nm to 480nm The luminescence peak of value or blue light-emitting layer is rendered as two different luminescence peaks at 440nm to 480nm.Therefore, it presents Go out four luminescence peaks.
In addition, because in 510nm to 570nm, i.e., shown at the luminescence peak of the light-emitting zone of green light emitting layer luminous Intensity so only realizing the green with short wavelength range, thus further improves excitation purity compared with yellow green.Compared with Example is compared, and in the curve illustrated by green color layer, the transmissivity of embodiment 5 close to wherein green color layer is most Big wave-length coverage, thus show not with other colour-mixed greens.Therefore, the luminous efficiency of green light emitting layer is wherein The transmissivity of green color layer is higher at maximum wave-length coverage, thus green efficiency improves.
Moreover, the excitation purity increase of each of red and green, thus DCI coverage rates increase.It thus provides for showing Show apparent and photorealism large size TV (TV).Here, DCI coverage rates can be described as DCI color space satisfactions.
Moreover, in embodiment 5, it can be seen that the luminous intensity of red light emitting layer increases.By red color chromatograph figure In the curve shown, it can be seen that compared with comparative example, the luminous intensity of embodiment 5 is in the region of red color chromatograph into one Step increases.Therefore, in embodiment 5, it can be seen that the luminous intensity increase of each of red and green, thus red efficiency Increase with green efficiency.
Moreover, in embodiment 5, the red corresponding to three luminescence peaks, green are shown in three illumination regions At least one of and blue wavelength, thus improve red efficiency, green efficiency and blue efficiency, and improve excitation purity and color Recall factor or color visual angle.Here, due to first and the third illumination region blue light-emitting layer that includes in each, blue light-emitting layer Luminescence peak the luminescence peak of two luminescence peaks or blue light-emitting layer is rendered as at 440nm to 480nm in 440nm Two different luminescence peaks are rendered as at 480nm.Therefore, because first arrives third illumination region, four glow peaks are showed Value.
Below with reference to table 1 and 2 and Figure 14 A-14B and the above-mentioned red efficiency of Figure 15 A-15B detailed descriptions, green effect Rate, chromaticity coordinates and DCI coverage rates.
Here, DCI coverage rates can be described as DCI color space satisfactions.The TV developed at present is required to meet DCI P3 colour gamuts, It extends about 130% than existing sRGB, to show apparent and true to nature image.DCI P3 can be rgb color space, And it can be described as representing the color reproduction rate of the color space than sRGB wide.However, DCI P3 are without being limited thereto.Color reproduction rate can be described as color Color space, color region, color reproduction region, color reproduction range or colour gamut.In addition, according to the development of the requirement of consumer and product, Color reproduction rate may change in range, and various terms can be used.In addition, coverage rate can be described as DCI and display equipment The overlapping range of color space.
Table 1 below shows comparative example, the efficiency of embodiment 4 and embodiment 5, chromaticity coordinates and DCI color spaces Satisfaction (DCI coverage rates).
In a comparative example, the first EML of the first illumination region may be configured with blue light-emitting layer, the first EML of the second illumination region Yellow green luminescent layer is may be configured with, the first EML of third illumination region may be configured with blue light-emitting layer.
Table 1
As shown in table 1, it can be seen that when the green efficiency of comparative example is 100%, embodiment 4 and embodiment 5 Green efficiency increase about 11% to about 13%.
Moreover, in a comparative example, the chromaticity coordinates for measuring green is (0.310,0.639)；In embodiment 4, measure green The chromaticity coordinates of color is (0.277,0.682).In addition, in embodiment 5, the chromaticity coordinates for measuring green is (0.281,0.681). Accordingly, it can be seen that compared with comparative example, the chromaticity coordinates of the green of embodiment 4 and embodiment 5 further expands.
Further, it can be seen that when the red efficiency of comparative example is 100%, the red effect of embodiment 4 and embodiment 5 Rate increases about 24% to about 27%.Thereby, it is possible to find out because emitting red light is further arranged in an illumination region Layer, so red efficiency increases.
Moreover, in a comparative example, it is (0.660,0.335) to measure red chromaticity coordinates；In embodiment 4, measure red The chromaticity coordinates of color is (0.669,0.327).In addition, in embodiment 5, it is (0.668,0.328) to measure red chromaticity coordinates. Accordingly, it can be seen that compared with comparative example, the red chromaticity coordinates of embodiment 4 and embodiment 5 further expands.
Moreover, when DCI color spaces satisfaction (or DCI coverage rates) is 100%, most clearly image matter is provided Amount.As shown in table 1, it can be seen that the DCI color space satisfactions of comparative example are 87.6%, and the DCI colors of embodiment 4 are empty Between satisfaction be 95.7%, the DCI color space satisfactions of embodiment 5 are 94.9%.It can be seen that compared with comparative example, it is real The DCI color space satisfactions for applying mode 4 and embodiment 5 further expand.This is because with red coloration and green each Excitation purity increase, DCI color space satisfactions increase.Accordingly, it can be seen that by application according to embodiment of the present invention Structure, DCI color space satisfactions are about 94.9% to about 95.7%.That is, it can be seen that it provides with frequently Compared with the oganic light-emitting display device of the clearer picture quality of example.
Following table 2 shows that when changing color layer, comparative example, the efficiency of embodiment 4 and embodiment 5, color are sat Mark and DCI color spaces satisfaction (DCI coverage rates).
Table 2
As shown in table 2, it can be seen that when the green efficiency of comparative example is 100%, embodiment 4 and embodiment 5 Green efficiency increase about 18% to about 20%.
Moreover, in a comparative example, the chromaticity coordinates for measuring green is (0.268,0.661)；In embodiment 4, measure green The chromaticity coordinates of color is (0.240,0.707).In addition, in embodiment 5, the chromaticity coordinates for measuring green is (0.243,0.707). Accordingly, it can be seen that compared with comparative example, the chromaticity coordinates of the green of embodiment 4 and embodiment 5 further expands.
Further, it can be seen that when the red efficiency of comparative example is 100%, the red effect of embodiment 4 and embodiment 5 Rate increases about 32% to about 34%.Thereby, it is possible to find out because emitting red light is further arranged in an illumination region Layer, so red efficiency increases.
Moreover, in a comparative example, it is (0.670,0.325) to measure red chromaticity coordinates；In embodiment 4, measure red The chromaticity coordinates of color is (0.677,0.320).In addition, in embodiment 5, it is (0.676,0.321) to measure red chromaticity coordinates. Accordingly, it can be seen that compared with comparative example, the red chromaticity coordinates of embodiment 4 and embodiment 5 further expands.
As shown in table 2, it can be seen that the DCI color space satisfactions of comparative example are 96.7%, the DCI of embodiment 4 Color space satisfaction is 99.3%, and the DCI color space satisfactions of embodiment 5 are 99.3%.It can be seen that and comparative example It compares, the DCI color space satisfactions of embodiment 4 and embodiment 5 further expand.This is because with red coloration and green The excitation purity of each increases, and DCI color space satisfactions increase.Accordingly, it can be seen that being implemented according to the present invention by application The structure of mode, DCI color space satisfactions are about 99.3%.
Figure 14 A-14B are the diagram for illustrating the DCI according to the 4th embodiment of the invention and comparative example, Figure 15 A-15B It is the diagram for illustrating the DCI according to the 5th embodiment of the invention and comparative example.Here, illustrating DCI colors by CIE 1976 Color space satisfaction.
Figure 14 A illustrate comparative example and DCI color space satisfactions, and Figure 14 B illustrate the 4th embodiment party of the present invention Formula and DCI color space satisfactions.As shown in fig. 14 a, comparative example is illustrated by solid line, DCI is illustrated by dotted line.With DCI It compares, it can be seen that in a comparative example, green DCI color space satisfactions are similar with DCI, but red DCI color spaces Satisfaction reduces.
In addition, as shown in Figure 14 B, illustrating embodiment 4 by solid line, DCI being illustrated by dotted line.Compared with DCI, energy Enough find out in embodiment 4, green DCI color space satisfactions increase, and red DCI color space satisfactions also increase Add.This is because increasing with red coloration and the green excitation purity of each, DCI color space satisfactions increase.Therefore, it is possible to see Go out the structure according to embodiment of the present invention by application, DCI color space satisfactions are about 99%.That is can see Go out and provides the oganic light-emitting display device with picture quality more clearer than comparative example.
Figure 15 A illustrate comparative example and DCI color space satisfactions, and Figure 15 B illustrate the 5th embodiment party of the present invention Formula and DCI color space satisfactions.As shown in figure 15 a, comparative example is illustrated by solid line, DCI is illustrated by dotted line.With DCI It compares, it can be seen that in a comparative example, green DCI color space satisfactions are similar with DCI, but red DCI color spaces Satisfaction reduces.
In addition, as shown in Figure 15 B, illustrating embodiment 5 by solid line, DCI being illustrated by dotted line.Compared with DCI, energy Enough find out in embodiment 5, green DCI color space satisfactions increase, and red DCI color space satisfactions also increase Add.This is because increasing with red coloration and the green excitation purity of each, DCI color space satisfactions increase.Therefore, it is possible to see Go out the structure according to embodiment of the present invention by application, DCI color space satisfactions are about 99%.That is can see Go out and provides the oganic light-emitting display device with picture quality more clearer than comparative example.
Figure 16 is the diagram for illustrating the white organic light emitting device 400 according to the 6th embodiment of the invention.It is describing When present embodiment, the description of pair identical as the element according to aforementioned embodiments or corresponding element is not repeated.
White organic light emitting device 400 shown in Figure 16 include substrate 401, the first and second electrodes 402 and 404, with And first between the first and second electrodes 402 and 404 arrives third illumination region 410,420 and 430.
First EML 414 of the first illumination region 410 is formed as blue light-emitting layer.In addition to blue light-emitting layer, the first EML 414 are formed as navy blue luminescent layer or sky blue luminescent layer.The luminescence peak of the light-emitting zone of first EML414 can be located at In the range of 440nm to 480nm.
First EML 414 of the first illumination region 410 is formed as yellow green luminescent layer or green light emitting layer.In this situation In, the luminescence peak of the light-emitting zone of the first EML 414 can be located in the range of 510nm to 580nm.When the first illumination region 410 The first EML 414 when being formed as yellow green luminescent layer or green light emitting layer, the first EML 424 of the second illumination region 420 can shape As blue light-emitting layer.In this case, the first illumination region 410 can have the glow peak being located in 510nm to 580nm ranges Value, the second illumination region 420 can have the luminescence peak being located in 440nm to 480nm ranges.
First EML 424 of the second illumination region 420 is formed as yellow green luminescent layer.The light-emitting zone of first EML424 Luminescence peak can be located in the range of 540nm to 580nm.
First EML 424 of the second illumination region 420 is formed as blue light-emitting layer.In addition to blue light-emitting layer, the first EML 424 are formed as navy blue luminescent layer or sky blue luminescent layer.The luminescence peak of the light-emitting zone of first EML424 can be located at In the range of 440nm to 480nm.When the first EML 414 of the first illumination region 410 is formed as blue light-emitting layer, second shines First EML424 in portion 420 is formed as yellow green luminescent layer or green light emitting layer.In this case, the first illumination region 410 There can be the luminescence peak being located in 440nm to 480nm ranges, the second illumination region 420, which can have, is located at 510nm to 580nm models Enclose interior luminescence peak.
First EML 434 of third illumination region 430 is formed as red light emitting layer, and the 2nd EML 435 is formed as blue Luminescent layer.The red light emitting layer above with reference to as described in Fig. 2 to 7, being further contained in third illumination region 430 may be provided at indigo plant Below color luminescent layer.In addition, the blue light-emitting layer as the 2nd EML 435 can be set to than the red as the first EML 434 Luminescent layer improves color visual angle change rate and red efficiency, green efficiency and blue effect closer to second electrode 404 At least one of rate.
In addition to blue light-emitting layer, the 2nd EML 435 of third illumination region 430 is formed as navy blue luminescent layer or sky blue Color luminescent layer.
The luminescence peak of the light-emitting zone of red light emitting layer as the first EML 434 can be located at the model of 600nm to 650nm In enclosing.In addition, the luminescence peak of the light-emitting zone of blue light-emitting layer as the 2nd EML 435 can be positioned at 440nm to 480nm's In range.Therefore, the luminescence peak of the light-emitting zone of third illumination region 430 can be located in the range of 440nm to 650nm.
Therefore, had according to the white organic light emitting device of the 6th embodiment of the invention and show three luminescence peaks Structure, wherein the first illumination region may be configured with blue light-emitting layer, the second illumination region may be configured with yellow green luminescent layer to carry The efficiency of high green light emitting layer, third illumination region may be configured with red light emitting layer to improve the efficiency of red light emitting layer.It is exactly It says, the present invention can apply the structure having based on three illumination regions there are three luminescence peak.Therefore, according to the present embodiment, lead to It crosses using TER-TEP structural improvements luminous efficiency, excitation purity and color reproduction rate or color visual angle.In addition, with green hair is used The situation of photosphere is compared, and the service life of oganic light-emitting display device is increased more in the situation using yellow green luminescent layer.
Here, because the first illumination region is configured with blue light-emitting layer, the glow peak of the light-emitting zone of blue light-emitting layer Value is located in the range of 440nm to 480nm.In addition, because the second illumination region is configured with yellow green luminescent layer, yellow green hair The luminescence peak of the light-emitting zone of photosphere is located in the range of 540nm to 580nm.In addition, because third illumination region is configured with red Color luminescent layer and blue light-emitting layer, so the luminescence peak of the light-emitting zone of red light emitting layer is located at the range of 600nm to 650nm It is interior, and the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because first and Each of three illumination regions is configured with blue light-emitting layer, so the luminescence peak of blue light-emitting layer is presented at 440nm to 480nm For a luminescence peak, thus, since first arrives third illumination region, realizing tool, there are three the TER-TEP structures of luminescence peak.
Selectively, because the first illumination region is configured with yellow green luminescent layer, the light-emitting zone of yellow green luminescent layer Luminescence peak be located in the range of 540nm to 580nm.In addition, because the second illumination region is configured with blue light-emitting layer, it is blue The luminescence peak of the light-emitting zone of color luminescent layer is located in the range of 440nm to 480nm.In addition, because third illumination region configures There are red light emitting layer and blue light-emitting layer, so the luminescence peak of the light-emitting zone of red light emitting layer is located at 600nm to 650nm's In range, and the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because second It is configured with blue light-emitting layer with each of third illumination region, so the luminescence peak of blue light-emitting layer is at 440nm to 480nm It is rendered as a luminescence peak, thus since first arrives third illumination region, realizing tool, there are three the TER-TEP of luminescence peak to tie Structure.
Selectively, because the first illumination region is configured with blue light-emitting layer, the hair of the light-emitting zone of blue light-emitting layer Photopeak value is located in the range of 440nm to 480nm.In addition, because the second illumination region is configured with yellow green luminescent layer, it is yellowish green The luminescence peak of the light-emitting zone of color luminescent layer is located in the range of 540nm to 580nm.In addition, because third illumination region configures There are red light emitting layer and blue light-emitting layer, so the luminescence peak of the light-emitting zone of red light emitting layer is located at 600nm to 650nm's In range, and the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because first It is configured with blue light-emitting layer with each of third illumination region, so the luminescence peak of blue light-emitting layer is at 440nm to 480nm The luminescence peak for being rendered as two luminescence peaks or blue light-emitting layer is rendered as two different hairs at 440nm to 480nm Photopeak value.Therefore, because first arrives third illumination region, four luminescence peaks are provided.That is due to three illumination regions, TER-TEP structures include that there are four the structures of luminescence peak for tool.
Selectively, because the first illumination region is configured with yellow green luminescent layer, the light-emitting zone of yellow green luminescent layer Luminescence peak be located in the range of 540nm to 580nm.In addition, because the second illumination region is configured with blue light-emitting layer, it is blue The luminescence peak of the light-emitting zone of color luminescent layer is located in the range of 440nm to 480nm.In addition, because third illumination region configures There are red light emitting layer and blue light-emitting layer, so the luminescence peak of the light-emitting zone of red light emitting layer is located at 600nm to 650nm's In range, and the luminescence peak of the light-emitting zone of blue light-emitting layer is located in the range of 440nm to 480nm.Therefore, because second It is configured with blue light-emitting layer with each of third illumination region, so the luminescence peak of blue light-emitting layer is at 440nm to 480nm The luminescence peak for being rendered as two luminescence peaks or blue light-emitting layer is rendered as two different hairs at 440nm to 480nm Photopeak value.Therefore, because first arrives third illumination region, four luminescence peaks are provided.That is due to three illumination regions, TER-TEP structures include that there are four the structures of luminescence peak for tool.
It will be described as being configured with emitting red light according to the white organic light emitting device of the 6th embodiment of the invention above The third illumination region of layer and blue light-emitting layer, but as described above with reference to Figure 8, the first illumination region may include red light emitting layer and indigo plant Color luminescent layer.In this case, the second illumination region may be configured with yellow green luminescent layer, and third illumination region may be configured with blue hair Photosphere.Therefore, the first illumination region can have two be located in 440nm to 480nm ranges and in 600nm to 650nm ranges A luminescence peak, the second illumination region can have the luminescence peak being located in 510nm to 580nm ranges, third illumination region that can have Luminescence peak in 440nm to 480nm ranges.That is due to above three illumination region, it can be achieved that TER-TEP structures.
Selectively, the first illumination region may be configured with red light emitting layer and blue light-emitting layer, and the second illumination region may be configured with Blue light-emitting layer, third illumination region may be configured with yellow green luminescent layer.Therefore, the first illumination region, which can have, is located at 440nm Two luminescence peaks within the scope of to 480nm and in 600nm to 650nm ranges, the second illumination region can have to be arrived positioned at 440nm Luminescence peak within the scope of 480nm, third illumination region can have the luminescence peak being located in 510nm to 580nm ranges.It is exactly It says, due to above three illumination region, it can be achieved that TER-TEP structures.Selectively, the third illumination region can have and be located at Two luminescence peaks in the range of 440nm to 480nm and in the range of 600nm to 650nm.
Bottom emission type is can be applied to according to the white organic light emitting device of the 6th embodiment of the invention, but and unlimited In this.Top emission type or dual-side emissive are can be applied to according to the white organic light emitting device of the 6th embodiment of the invention Type.In top emission type or dual-side emissive type, the position of luminescent layer can be changed according to the characteristic or structure of device.Institute as above It states, when setting includes two luminescent layers of red light emitting layer, the luminous intensity or color visual angle change rate of luminescent layer are by red The position of luminescent layer influences.Therefore, in the white organic light emitting device of the present invention, luminous intensity or face that can be based on luminescent layer The position of red light emitting layer is arranged in color visual angle change rate, so as to improve color visual angle change rate and red efficiency, green efficiency At least one of with blue efficiency.
In including the oganic light-emitting display device according to the white organic light emitting device of 6th embodiment of the invention, Can be arranged on substrate 401 by it is intersected with each other come limit respectively multiple pixel regions a plurality of grid line and multiple data lines, And a plurality of power cord extended in parallel with grid line or data line, it can be arranged in each of multiple pixel regions and corresponding Grid line and the corresponding data line switching thin-film transistor (TFT) connected and the driving TFT being connect with switch TFT.Drive TFT It can be connect with first electrode 402.
Figure 17 is to illustrate shining according to the white organic light emitting device of the 6th embodiment of the invention and comparative example The diagram of intensity.
In fig. 17, horizontal axis indicates that the wave-length coverage (nm) of light, the longitudinal axis indicate luminous intensity.Luminous intensity can be by table It is shown as the numerical value of the relative value relative to EL spectral maximums.
In fig. 17, comparative example is illustrated by dotted line, embodiment 6 is illustrated by solid line.
In fig. 17, in a comparative example, the first EML of the first illumination region may be configured with blue light-emitting layer, the second illumination region The first EML may be configured with yellow green luminescent layer, the first EML of third illumination region may be configured with blue light-emitting layer.
In embodiment 6, as shown in Figure 16, the first EML 414 of the first illumination region 410 may be configured with blue-light-emitting Layer, the first EML 424 of the second illumination region 420 may be configured with yellow green luminescent layer.First illumination region 410 may include the first EML 414, other than blue light-emitting layer, the first EML 414 may be configured with navy blue luminescent layer or sky blue luminescent layer.
It can be provided as the red light emitting layer of the first EML 434 of third illumination region 430 and the indigo plant as the 2nd EML 435 Color luminescent layer, and blue light-emitting layer may be disposed on red light emitting layer.Other than blue light-emitting layer, the 2nd EML 435 can shape As navy blue luminescent layer or sky blue luminescent layer.
As shown in Figure 17, in a comparative example, it can be seen that in 440nm to 480nm, the i.e. light-emitting zone of blue light-emitting layer Luminescence peak at show luminous intensity；And in 540nm to 580nm, i.e., the light-emitting zone of yellow green luminescent layer is luminous Luminous intensity is shown at peak value.
Therefore, in a comparative example, because yellow green wave-length coverage is overlapping with red wavelength range, color mixing, because And desired green difficult to realize and red.Due to this, it is difficult to realize desired white organic light emitting device.In addition, In comparative example, it can be seen that the luminous intensity of red light emitting layer is relatively low, thus red light emitting layer is less efficient.
Moreover, in a comparative example, the yellow green and indigo plant corresponding to two luminescence peaks are only shown in three illumination regions Color, and yellow green should realize red and green, and the red and green excitation purity of each is caused to reduce.Due to this, very Hardly possible realizes desired white organic light emitting device.
In embodiment 6, it can be seen that in 440nm to 480nm, the i.e. luminescence peak of the light-emitting zone of blue light-emitting layer Place shows luminous intensity；In 540nm to 580nm, i.e., shown at the luminescence peak of the light-emitting zone of yellow green luminescent layer Luminous intensity；And in 600nm to 650nm, i.e., shows and shone by force at the luminescence peak of the light-emitting zone of red light emitting layer Degree.That is, it can be seen that present three luminescence peaks.In addition, because red light emitting layer is further arranged, it is red The luminous intensity of luminescent layer increases, thus improves red efficiency and red excitation purity.Here, since first and third shine The blue light-emitting layer that portion includes in each, the luminescence peak of blue light-emitting layer are rendered as two at 440nm to 480nm and shine The luminescence peak of peak value or blue light-emitting layer is rendered as two different luminescence peaks at 440nm to 480nm.Therefore, it is in Reveal four luminescence peaks.
Moreover, the excitation purity increase of each of red and green, thus DCI coverage rates increase.It thus provides for showing Show apparent and photorealism large scale TV.Here, DCI coverage rates can be described as DCI color space satisfactions.
Moreover, in embodiment 6, the red corresponding to three luminescence peaks, green are shown in three illumination regions At least one of and blue wavelength, thus improve red efficiency, green efficiency and blue efficiency, and improve excitation purity and color Recall factor or color visual angle.Here, due to first and the third illumination region blue light-emitting layer that includes in each, blue light-emitting layer Luminescence peak the luminescence peak of two luminescence peaks or blue light-emitting layer is rendered as at 440nm to 480nm in 440nm Two different luminescence peaks are rendered as at 480nm.Therefore, because first arrives third illumination region, four glow peaks are showed Value.
Below with reference to table 3 and the above-mentioned red efficiency of Figure 18 A-18B detailed descriptions, green efficiency, chromaticity coordinates and DCI coverings Rate.
Here, DCI coverage rates can be described as DCI color space satisfactions.The TV developed at present is required to meet DCI P3 colour gamuts, It extends about 130% than existing sRGB, to show apparent and true to nature image.DCI P3 can be rgb color space, And it can be described as representing the color reproduction rate of the color space than sRGB wide.However, DCI P3 are without being limited thereto.Color reproduction rate can be described as color Color space, color region, color reproduction region, color reproduction range or colour gamut.In addition, according to the development of the requirement of consumer and product, Color reproduction rate may change in range, and various terms can be used.In addition, coverage rate can be described as DCI and display equipment The overlapping range of color space.
Table 3 below shows the efficiency of comparative example and embodiment 6, chromaticity coordinates and DCI coverage rates.Can by application with The identical color layer of color layer of table 2 simultaneously measures to obtain following table 3.
In a comparative example, the first EML of the first illumination region may be configured with blue light-emitting layer, the first EML of the second illumination region Yellow green luminescent layer is may be configured with, the first EML of third illumination region may be configured with blue light-emitting layer.
Table 3
As shown in table 3, it can be seen that when the green efficiency of comparative example is 100%, the green efficiency drop of embodiment 6 Low about 2%.Further, it can be seen that when the red efficiency of comparative example is 100%, the red efficiency of embodiment 6 increases About 48%.Thereby, it is possible to find out that, because red light emitting layer is further arranged in an illumination region, red efficiency increases Add.
Moreover, in a comparative example, the chromaticity coordinates for measuring green is (0.268,0.661)；In embodiment 6, measure green The chromaticity coordinates of color is (0.274,0.659).In addition, in a comparative example, it is (0.670,0.325) to measure red chromaticity coordinates； In embodiment 6, it is (0.681,0.317) to measure red chromaticity coordinates.Accordingly, it can be seen that compared with comparative example, embodiment party The red chromaticity coordinates of formula 6 further expands.
Moreover, when DCI color spaces satisfaction (or DCI coverage rates) is 100%, most clearly image matter is provided Amount.As shown in table 3, it can be seen that the DCI color space satisfactions of comparative example are 96.7%, and the DCI colors of embodiment 6 are empty Between satisfaction be 98.0%.It can be seen that compared with comparative example, the DCI color space satisfactions of embodiment 6 further expand. This is because increasing with red coloration and the green excitation purity of each, DCI color space satisfactions increase.Accordingly, it can be seen that By application according to the structure of embodiment of the present invention, DCI color space satisfactions are about 98.0%.That is can see Go out and provides the oganic light-emitting display device with picture quality more clearer than comparative example.
Figure 18 A-18B are the diagrams for illustrating the DCI according to the 6th embodiment of the invention and comparative example.Here, by CIE 1976 illustrate DCI color space satisfactions.
Figure 18 A illustrate comparative example and DCI color space satisfactions, and Figure 18 B illustrate the 6th embodiment party of the present invention Formula and DCI color space satisfactions.As shown in figure 18, comparative example is illustrated by solid line, DCI is illustrated by dotted line.With DCI It compares, it can be seen that in a comparative example, green DCI color space satisfactions are similar with DCI, but red DCI color spaces Satisfaction reduces.
In addition, as shown in Figure 18 B, illustrating embodiment 6 by solid line, DCI being illustrated by dotted line.Compared with DCI, energy Enough find out in embodiment 6, green DCI color space satisfactions are almost similar with DCI, and red DCI color spaces Satisfaction also increases.This is because increasing with red coloration and the green excitation purity of each, DCI color space satisfactions increase. Accordingly, it can be seen that by application according to the structure of embodiment of the present invention, DCI color space satisfactions are about 98.0%. That is, it can be seen that provide the oganic light-emitting display device with picture quality more clearer than comparative example.
As described above, according to the embodiment of the present invention, it includes emitting red light that at least one of three illumination regions, which are configured with, Two luminescent layers of layer, and the position of red light emitting layer is set, thus improve color visual angle change rate and red efficiency, green At least one of efficiency and blue efficiency.
Moreover, according to the embodiment of the present invention, red light emitting layer, thus red light emitting layer are added into an illumination region Luminous intensity increase, which thereby enhance the luminous efficiency of red light emitting layer.
Moreover, according to the embodiment of the present invention, there are two luminescent layers (for example, blue light-emitting layer for an illumination region configuration And red light emitting layer), and blue light-emitting layer is arranged to than red light emitting layer, closer to first electrode, thus improve the hair of luminescent layer Luminous intensity and color reproduction rate or color visual angle.
Moreover, according to the embodiment of the present invention, there are two luminescent layers (for example, blue light-emitting layer for an illumination region configuration And red light emitting layer), and blue light-emitting layer is arranged to than red light emitting layer, closer to second electrode, thus improve the hair of luminescent layer Luminous intensity and color reproduction rate or color visual angle.
Moreover, according to the embodiment of the present invention, red light emitting layer is added into an illumination region, and pass through application green The excitation purity of luminescent layer, red excitation purity and green increases, and DCI coverage rates expand.Therefore, the electricity with large scale screen Clearer image is provided depending on (TV).
Moreover, according to the embodiment of the present invention, by the way that three illumination region application tools, there are three the TER- of luminescence peak TEP structures improve luminous efficiency, excitation purity and color reproduction rate or color visual angle.
In addition, present inventors have recognized that when setting include two luminescent layers of red light emitting layer when, driving voltage increase and The problem of quantum efficiency significantly reduces.To solve the problems, such as this, the present inventor to when illumination region configured with red light emitting layer and It is tested when other luminescent layers for improving brightness and color reproduction rate and reducing the various methods of driving voltage.
Figure 19 is the schematic cross section for illustrating the white organic light emitting device 500 according to the 7th embodiment of the invention Figure.
In the white organic light emitting device 500 shown in Figure 19, illumination region is configurable, and there are two luminescent layers, for improving dress The color reproduction rate set.
White organic light emitting device 500 is including substrate 501, the first and second electrodes 502 and 504 and is located at the first and Illumination region between second electrode 502 and 504.Here, illumination region may include the first EML 514 and the 2nd EML 515.
First electrode 502 is to provide the anode in hole, and can be by as the saturating of such as transparent conductive oxide (TCO) etc Tin indium oxide (ITO) or indium zinc oxide (IZO) formation of bright conductive material.However, present embodiment is without being limited thereto.
Second electrode 504 is to provide the cathode of electronics, and can by as metal material gold (Au), silver-colored (Ag), aluminium (Al), Molybdenum (Mo) or magnesium (Mg) formation, or can be formed by their alloy.However, present embodiment is without being limited thereto.
Each of first electrode 502 and second electrode 504 can be described as anode or cathode.In addition, first electrode 502 can Referred to as half transmitting electrode, second electrode 504 can be described as reflecting electrode.
Here, bottom emission type will be described.
Illumination region may include the first HTL 512, the first EML514,515 and of the 2nd EML being arranged in first electrode 502 First ETL 516.
First EML 514 of illumination region is formed as blue light-emitting layer, and the 2nd EML 515 is formed as red light emitting layer. 2nd EML 515 can be set to improve color reproduction rate.This will be described with reference to Fig. 2 to 7.However, when an illumination region is configured with packet When including two luminescent layers of blue light-emitting layer and red light emitting layer, since device thickness increases, luminous intensity reduces, driving voltage Increase, and quantum efficiency reduces.
This will be described in detail with reference to Figure 20.Figure 20 is shown when each of blue light-emitting layer and red light emitting layer have list The luminous intensity measured when a color.
In fig. 20, horizontal axis indicates that the wave-length coverage (nm) of light, the longitudinal axis indicate luminous intensity.Luminous intensity can be by table It is shown as the numerical value of the relative value relative to EL spectral maximums.
As shown in Figure 20, when illumination region is configured with blue light-emitting layer (in fig. 20 by 1. indicating), it can be seen that hair Luminous intensity increases in 440nm to 480nm that is, at the luminescence peak of the light-emitting zone of blue light-emitting layer.In addition, when illumination region configures When having red light emitting layer (in fig. 20 by 2. indicating), it can be seen that luminous intensity is in 600nm to 650nm, i.e. red light emitting layer Light-emitting zone luminescence peak at increase.
On the other hand, when illumination region be configured with include blue light-emitting layer and red light emitting layer two luminescent layers (in Figure 20 In by 3. indicating) when, it can be seen that luminous intensity is in 440nm to 480nm, the i.e. luminescence peak of the light-emitting zone of blue light-emitting layer Place and in 600nm to 650nm significantly reduces that is, at the luminescence peak of the light-emitting zone of red light emitting layer.Therefore, when a hair There are two when luminescent layer for the configuration of light portion, it can be seen that luminous intensity reduces.
The result by measuring driving voltage and quantum efficiency acquisition is shown in following table 4.
Table 4
As shown in table 4, it can be seen that illumination region is configured with driving voltage when blue light-emitting layer (by 1. indicating) (Volt) it is 3.7V, driving voltage when illumination region is configured with red light emitting layer (by 2. indicating) is 3.1V.Further, it can be seen that Driving voltage when illumination region is configured with blue light-emitting layer and red light emitting layer (by 3. indicating) is 4.3V.Accordingly, it can be seen that Compared with illumination region is configured with the situation of blue light-emitting layer (by 1. indicating) or red light emitting layer (by 2. indicating), match in illumination region It is equipped in the situation of blue light-emitting layer and red light emitting layer (by 3. indicating), driving voltage increases more.
In table 4, EQE is external quantum efficiency, luminous efficiency when indicating outside optical transport to organic light emitting apparatus.It is blue The quantum efficiency (EQE) of color luminescent layer (by 1. indicating) can be 8.9%, the quantum efficiency of red light emitting layer (by 2. indicating) (EQE) can be 9.9%.In addition, when illumination region is configured with blue light-emitting layer and red light emitting layer (by 3. indicating), quantum effect Rate (EQE) is predicted to be about 9.0%, i.e. median, but it can be seen that it is 3.6% that quantum efficiency (EQE), which significantly reduces, is As median 9.0% about 40%.That is, it can be seen that with illumination region configured with single layer (for example, blue-light-emitting Layer or red light emitting layer) situation compare, in situation of the illumination region configured with blue light-emitting layer and red light emitting layer, quantum effect Rate (EQE) reduces too many.
Therefore, when an illumination region is configured with blue light-emitting layer and red light emitting layer, driving voltage increases, and quantum is imitated Rate reduces.This will be described in detail with reference to Figure 21 caused by the characteristic by luminescent layer.
Figure 21 illustrates the energy band diagram of the luminescent layer according to the 7th embodiment of the invention.
In figure 21, each of blue light-emitting layer 514 and red light emitting layer 515 may include matrix and dopant.Blue The matrix 514H of luminescent layer 514 may include anthracene derivant, for example, can be used TBSA (it is 9,10- bis- [(2 ", 7 "-di-t-butyl) -9', 9 "-spiro-bisfluorene base] anthracene) or 1-ADN (9,10- bis- (2- naphthalenes) anthracene).However, present embodiment is not limited to this.In addition, blue The dopant 514D of luminescent layer 514 may include anthracene derivant, perylene derivative or pyrene derivatives, and but it is not limited to this.Separately On the one hand, dopant 514D can be by with spiral-DPVBi, spiral -6P, distyryl biphenyl (DSB), distyrene (DSA), the fluorescent material of at least one of PFO based polyalcohols and PPV based polyalcohols is formed, and but it is not limited to this.
The matrix 515H of red light emitting layer 515 may include anthracene derivant, such as MADN (2- methyl -9,10- bis- can be used (2- naphthalenes) anthracene).The dopant 515D of red light emitting layer 515 can be by including pyran derivate, such as DCJTB (4- (dicyan methylenes Base) -2- tert-butyls -6- (the long Luo Nidingji -4- vinyl of 1,1,7,7- tetramethyls) -4H- pyrans), boron derivative or dinaphthyl it is embedding The fluorescent material of benzene derivative is formed, and but it is not limited to this.
The electron transport property of the matrix 514H of blue light-emitting layer 514 is stronger, the hole trap characteristic of dopant 514D compared with By force.In addition, the electron transport property of the matrix 515H of red light emitting layer 515 is weaker, the hole trap characteristic of dopant 515D compared with By force.
Therefore, the electron mobility of blue light-emitting layer 515 is very fast, and the hole mobility of red light emitting layer 515 is very fast.Cause And the carrier that HTL 512 or ETL 516 is received is difficult from 514 internal transmission of blue light-emitting layer to subsequent red light emitting layer 515, due to this, driving voltage increases.Alternatively, the carrier that HTL512 or ETL 516 is received is difficult from red light emitting layer 515 internal transmissions are to subsequent blue light-emitting layer 514, and due to this, driving voltage increases.Therefore, hole and electronics can be Recombination in blue light-emitting layer 514 or red light emitting layer 515, due to this, exciton quantity is reduced.
That is as shown in Figure 21, the recombination region RZ1 of blue light-emitting layer 514 may be provided at blue light-emitting layer 514 with Between HTL 512, the recombination region RZ2 of red light emitting layer 515 may be provided between red light emitting layer 515 and ETL 516.Cause This, the recombination region RZ1 of blue light-emitting layer 514 and the recombination region RZ2 of red light emitting layer 515 are smaller, due to this, blue Luminescent layer 514 and red light emitting layer 515 luminous efficiency of each reduce.
Moreover, the exciton combined in blue light-emitting layer 514 can emit from the relatively low red light emitting layer 515 of energy Light, due to this, blue light-emitting layer 514 is more difficult to shine.
Therefore, inventor recognizes that an illumination region is configured with blue light-emitting layer and red light emitting layer wherein, to carry In the brightness of high white organic light emitting device and the situation of color reproduction rate, blue light-emitting layer and the red light emitting layer hair of each Light efficiency reduces, and due to this, this situation is not suitable for equipment energy characteristic.
This to solve the problems, such as, the present inventor has invented a kind of white organic light emitting device with new construction, wherein when When one illumination region is configured with blue light-emitting layer and red light emitting layer, improve blue light-emitting layer and red light emitting layer each Luminous efficiency.
Therefore, the present inventor has invented a kind of white organic light emitting device with new construction, for solving when a hair The problem of configuration of light portion increases there are two driving voltage when luminescent layer or quantum efficiency reduces, and improve brightness and color reproduction Rate.
According to the embodiment of the present invention, in the organic light emitting apparatus including at least two illumination regions, at least two hairs An illumination region in light portion may include that blue light-emitting layer and red light emitting layer, blue light-emitting layer can be set to close to the first electricity Pole.Therefore, each of blue light-emitting layer and red light emitting layer can emit light at the luminescence peak of desired light-emitting zone, thus Improve blue light-emitting layer and the red light emitting layer luminous intensity and color reproduction rate of each.In addition, by adjusting emitting red light Energy gap between the dopant for including and matrix in layer improves blue light-emitting layer and the red light emitting layer luminous effect of each Rate.
Inventors have established that as the energy gap between the dopant and matrix for including in red light emitting layer increases, it is difficult to will Energy is transferred to dopant from matrix.This will be described in detail with reference to table 5.
Table 5
In table 5, embodiment 8-1 can be made of red matrix and Red dopants.Red matrix and Red dopants It can be formed by least one of material described above, but it is not limited to this.
Embodiment 8-2 can be made of green matrix and Red dopants.Green matrix may include anthracene derivant, such as can By including TBSA (bis- [(2 ", 7 "-di-t-butyl) -9', the 9 "-spiro-bisfluorene bases] anthracenes of 9,10-) or 1-ADN (9,10- bis- (2- naphthalenes) Anthracene) material formed, but it is not limited to this.In addition, Red dopants can be formed by least one of material described above, but It is not limited to this.
Embodiment 8-3 can be made of blue substrate and Red dopants.Blue substrate and Red dopants can be by above The formation of at least one of described material, but it is not limited to this.
As shown in table 5, it can be seen that energy gap " the Δ Eg between the dopant for including in red light emitting layer and matrix (H-D) " in, embodiment 8-1 is 0.4eV, and embodiment 8-2 is 0.8eV, and embodiment 8-3 is 1.0eV.Furthermore it is possible to see Go out in driving voltage " Volt ", embodiment 8-1 is 3.1V, and embodiment 8-2 is 3.3V, and embodiment 8-3 is 3.6V.This Outside, it can be seen that in quantum efficiency " EQE ", embodiment 8-1 is 9.9%, and embodiment 8-2 is 7.0%, embodiment 8- 3 be 5.3%.
Therefore, the larger implementation of energy gap " Δ Eg (H-D) " between the dopant for including in red light emitting layer and matrix In mode 8-2 or 8-3, it can be seen that driving voltage increases, and quantum efficiency " EQE " reduces.
Figure 22 is the diagram of the luminous intensity of red light emitting layer shown in graphic table 5.In fig. 22, it can be seen that with Energy gap between the dopant for including in red light emitting layer and matrix increases, and luminous intensity reduces.Accordingly, it can be seen that when implementing When the energy gap between dopant and matrix in mode 8-2 or 8-3 is more than 0.4eV, 600nm to 650nm, i.e. red light emitting layer Luminous intensity at luminescence peak is less than the smaller embodiment 8-1 of the energy gap wherein between dopant and matrix.
Moreover, being obtained from the light of host emission from dopant at the luminescence peak of 400nm to 500nm by measuring The transmitting of light whether due to the energy gap difference between matrix and dopant repressed result.That is in embodiment 8-1 In, it can be seen that matrix does not emit light at 400nm to 500nm, thus emits red light from matrix and dopant.Another party Face, in embodiment 8-2 or 8-3, it can be seen that because matrix emits light at 400nm to 500nm, remove red light it Also emit blue light outside, energy is not transferred to dopant from matrix.Accordingly, it can be seen that wherein between dopant and matrix The larger luminescent layer of energy gap be arranged in the situation of single layer because energy is difficult to be transferred to dopant from matrix, The luminous efficiency of luminescent layer reduces, and driving voltage increases, and luminous intensity reduces.
Based on the above results, the smaller implementation of the energy gap that is arranged together with blue light-emitting layer between wherein dopant and matrix The red light emitting layer of mode 8-1, the present inventor have carried out various experiments to equipment energy characteristic.However, together with blue light-emitting layer It is arranged in the situation of the red light emitting layer of embodiment 8-1, present inventors have recognized that the luminous intensity of red light emitting layer increases, it is blue The luminous intensity of color luminescent layer significantly reduces, and this situation is not suitable for equipment energy characteristic.
Moreover, the embodiment 8- larger in the energy gap being arranged together with blue light-emitting layer between wherein dopant and matrix In the situation of the red light emitting layer of 2 or 8-3, present inventors have recognized that the transmitting of the light from red light emitting layer is suppressed, blue Luminescent layer shines.That is present inventors have recognized that the luminous efficiency of red light emitting layer is kept, and blue light-emitting layer is luminous Efficiency improves.
This will be described in detail with reference to table 6 and Figure 23.
Following table 6 show when an illumination region be configured with blue light-emitting layer and red light emitting layer when, blue light-emitting layer With the red light emitting layer driving voltage and external quantum efficiency of each.
Table 6
In table 6, the structure of the embodiment 9-1,9-2 and 9-3 of red light emitting layer are identical as those of table 5, because without Its detailed description is provided again.
In table 6, the matrix of blue light-emitting layer may include anthracene derivant, for example, can by comprising TBSA (it is 9,10- bis- [(2 ", 7 "-di-t-butyl) -9', 9 "-spiro-bisfluorene base] anthracene) or the material of 1-ADN (9,10- bis- (2- naphthalenes) anthracene) formed, but it is and unlimited In this.In addition, the dopant of blue light-emitting layer may include anthracene derivant, perylene derivative or pyrene derivatives, but and it is unlimited In this.
As shown in table 6, it can be seen that in driving voltage " Volt ", embodiment 9-1 is 4.3V, embodiment 9-2 It is 3.7V for 3.6V, embodiment 9-3.Further, it can be seen that in external quantum efficiency " EQE ", embodiment 9-1 is 3.6%, Embodiment 9-2 is 6.9%, and embodiment 9-3 is 7.5%.
Therefore, the larger embodiment 9-2 of energy gap between the dopant for including in wherein red light emitting layer and matrix In 9-3, it can be seen that driving voltage is relatively low, and quantum efficiency " EQE " increases.This is because when using wherein dopant and base When the larger red light emitting layer of energy gap between matter, exciton is generated from the dopant of blue light-emitting layer instead of red light emitting layer, Thus the luminous efficiency of blue light-emitting layer increases.
Therefore, from the result of table 6 it can be seen that when the energy gap in red light emitting layer between the dopant for including and matrix is When 0.4eV, driving voltage is higher, and external quantum efficiency reduces.On the other hand, it can be seen that wherein between dopant and matrix Energy gap more than 0.4eV red light emitting layer in, driving voltage is relatively low, and external quantum efficiency increase.
In addition, below by by comparing come describe wherein illumination region be only configured with table 5 red light emitting layer situation and The situation of red light emitting layer and blue light-emitting layer of the illumination region configured with table 6.
It can be seen that the driving voltage of the embodiment 8-1 in table 5 is 3.1V；In table 6, the driving of embodiment 9-1 Voltage is 4.3V.In addition, the quantum efficiency " EQE " of the embodiment 8-1 in table 5 is 9.9%, the embodiment 9-1's in table 6 Quantum efficiency " EQE " is 3.6%.In embodiment 9-1 of the wherein illumination region configuration there are two luminescent layer, it can be seen that Quantum efficiency " EQE " significantly reduces.
Therefore, based on the embodiment in table 6,9-1's wherein mix as a result, it is possible to find out and be arranged together with blue light-emitting layer When the smaller red light emitting layer of the miscellaneous dose of energy gap between matrix, driving voltage increases, and quantum efficiency reduces.
On the other hand, it can be seen that the driving voltage of the embodiment 8-2 in table 5 is 3.3V；In table 6, embodiment The driving voltage of 9-2 is 3.6V.In addition, the quantum efficiency " EQE " of the embodiment 8-2 in table 5 is 7.0%, the implementation in table 6 The quantum efficiency " EQE " of mode 9-2 is 6.9%.Further, it can be seen that the driving voltage of the embodiment 8-3 in table 5 is 3.6V；In table 6, the driving voltage of embodiment 9-3 is 3.7V.In addition, the quantum efficiency of the embodiment 8-3 in table 5 " EQE " is 5.3%, and the quantum efficiency " EQE " of the embodiment 9-3 in table 6 is 7.5%.
Therefore, based on the embodiment 9-2 and 9-3's as a result, it is possible to find out when being arranged together with blue light-emitting layer in table 6 When the larger red light emitting layer of energy gap wherein between dopant and matrix, driving voltage reduces, and quantum efficiency increases or several It is kept.
Based on the above results, it can be seen that the energy gap between the dopant and matrix of red light emitting layer is 0.4eV wherein Or in the situation less than 0.4eV, driving voltage increases, and quantum efficiency significantly reduces, and thus this situation is not suitable for device Characteristic.That is, it can be seen that the energy gap between the dopant and matrix of red light emitting layer is more than the situation of 0.4eV wherein In, the characteristic of such as low driving voltage and quantum efficiency etc is excellent, thus this situation is suitable for equipment energy characteristic.Or Person, it can be seen that the energy gap between the dopant and matrix of red light emitting layer is more than 0.4eV and less than or equal to 1.2eV's wherein In situation, the characteristic of such as low driving voltage and quantum efficiency etc is excellent, thus this situation is suitable for equipment energy characteristic.
Therefore, the present inventor is experiments prove that include two of red light emitting layer luminous when an illumination region is configured with Layer when, wherein the larger red light emitting layer of the energy gap between dopant and matrix do not influence such as driving voltage or luminous efficiency it The equipment energy characteristic of class.
Figure 23 is illustrated according to the 9th blue light-emitting layer of embodiment of the invention and the luminous intensity of red light emitting layer Diagram.That is Figure 23 is shown when the energy gap between the matrix and dopant of the red light emitting layer in table 6 is different from blue Luminous intensity when energy gap between the matrix and dopant of luminescent layer.
As shown in Figure 23, the larger embodiment 9- of energy gap wherein between the dopant and matrix of red light emitting layer In 3, it can be seen that luminous intensity increases in 440nm to 480nm that is, at the luminescence peak of the light-emitting zone of blue light-emitting layer.This Outside, it can be seen that in 600nm to 650nm, i.e., show luminous intensity at the luminescence peak of the light-emitting zone of red light emitting layer.Cause This, it can be seen that is when an illumination region is configured with larger red of blue light-emitting layer and energy gap wherein between dopant and matrix When color luminescent layer, the luminous intensity of red light emitting layer slightly reduces, and the luminous intensity of blue light-emitting layer greatly increases.
Therefore, in the present embodiment, because of the energy gap between the dopant and matrix of red light emitting layer and blue hair Energy gap between the dopant and matrix of photosphere is arranged to different, so improving blue light-emitting layer and red light emitting layer is each A luminous efficiency reduces driving voltage, and the luminous intensity of blue light-emitting layer dramatically increases.In addition, in present embodiment In, because the energy gap between the dopant and matrix of red light emitting layer is set to larger than the dopant and matrix of blue light-emitting layer Between energy gap reduce driving voltage so improving blue light-emitting layer and the red light emitting layer luminous efficiency of each, and The luminous intensity of blue light-emitting layer dramatically increases.In addition, having than red wave because the matrix for including in red light emitting layer uses The green or blue substrate of the wavelength of length so inhibiting the transmitting due to red light caused by exciton, and lure blue light into Transmitting, the luminous intensity for thus reducing driving voltage and blue light-emitting layer dramatically increases.
Figure 24 illustrates the energy band diagram of the luminescent layer according to the 9th embodiment of the invention.
As shown in Figure 24, because energy gap and blue light-emitting layer between the dopant and matrix of red light emitting layer is mixed The miscellaneous dose of energy gap between matrix can be arranged to different, so passing through the recombination region for combining electronics with generating exciton by hole RZ may be provided between blue light-emitting layer 614 and red light emitting layer 615.Therefore, recombination region RZ can be set to the weight than Figure 21 Group region is wide, thus blue light-emitting layer is easy to emit light, and blue light-emitting layer and the red light emitting layer luminous efficiency of each increase.
As described above, the characteristic electron of the matrix 615H of red light emitting layer 615 is weaker than hole characteristic, thus in order to make electronics It is preferably transferred to ETL 616, electron mobility should be more than hole mobility.Therefore, the electron mobility of matrix 615H can It is set as 10-5cm2The hole mobility of/Vs, matrix 615H can be set as 10-10-10-11cm2/Vs.Therefore, recombination region RZ becomes setting It is set to the recombination zone field width than Figure 21, blue light-emitting layer and red light emitting layer smoothly emit light.
Moreover, the energy gap of the matrix 615H of red light emitting layer 615 can be set as 2.6eV to 3.0eV, the energy gap of dopant 615D It can be set as 1.8eV to 2.2eV.Therefore, the energy gap between the matrix 615H and dopant 615D of red light emitting layer 615 can be set as big In 0.4eV.Selectively, the energy gap between the matrix 615H and dopant 615D of red light emitting layer 615 can be set as being more than 0.4eV And it is less than or equal to 1.2eV.
Moreover, the energy gap between the matrix 614H and dopant 614D of blue light-emitting layer 614 should be less than red light emitting layer Energy gap between 615 matrix 615H and dopant 615D.The energy gap of the matrix 614H of blue light-emitting layer 614 can be set as 2.8eV Energy gap to 3.2eV, and matrix 614H can be set as 2.6eV to 3.0eV.Therefore, for ease of by energy from blue light-emitting layer 614 Matrix 614H be transferred to dopant 614D, the energy gap between the matrix 614H and dopant 614D of blue light-emitting layer 614 can be set For 0.4eV or smaller.
That is because the energy gap between the matrix 615H for including in red light emitting layer 615 and dopant 615D is set as big Energy gap between the matrix 614H for including in blue light-emitting layer 614 and dopant 614D, so the group in red light emitting layer 615 The exciton of conjunction emits light in the dopant 614D of blue light-emitting layer 614, thus prevents the luminous efficiency of blue light-emitting layer 614 from dropping It is low.In addition, because the energy gap in red light emitting layer 615 between the matrix 615H for including and dopant 615D is set as being more than blue hair Energy gap between the matrix 614H for including in photosphere 614 and dopant 614D, so inhibiting the light from red light emitting layer Transmitting, and the transmitting of the light from blue light-emitting layer increases, and thereby increases the luminous efficiency of blue light-emitting layer.
Moreover, the matrix of the blue or green by application with the wavelength more relatively wide than red wavelength or with short wavelength Material, it is suppressed that the transmitting of the light from red light emitting layer, and improve from the blue light-emitting layer adjacent with red light emitting layer Light transmitting.
The thickness of blue light-emitting layer 614 can be set asIn addition, the hole characteristic of blue light-emitting layer 614 It is weaker than characteristic electron, thus HTL material can be mixed with 0% to 50% ratio in blue light-emitting layer 614.In addition, blue hair The doping concentration for the dopant 614D for including in photosphere 614 can be set as 2.0% to 8.0%.
The thickness of red light emitting layer 615 can be set asIn addition, the characteristic electron ratio of red light emitting layer 615 Hole characteristic is weak, thus can mix ETL materials in red light emitting layer 615 with 0% to 50% ratio.In addition, emitting red light The doping concentration for the dopant 615D for including in layer 615 can be set as 0.5% to 2.0%.
Figure 25 is the schematic cross section for illustrating the white organic light emitting device 700 according to the tenth embodiment of the invention Figure.When describing present embodiment, pair identical as the element according to aforementioned embodiments or corresponding element retouch is not repeated It states.
White organic light emitting device 700 shown in Figure 25 include substrate 701, the first and second electrodes 702 and 704, with And the first and second illumination regions 710 and 720 between the first and second electrodes 702 and 704.
As the example of the 4th embodiment of the invention, illumination region and first there are three being provided with is described above Illumination region is configured with the situation for two luminescent layers for including red light emitting layer.Match above with reference to the first illumination regions described of Fig. 2 to 7 The situation for being equipped with two including red light emitting layer luminescent layers can be applied to be provided with the situation there are two illumination region.It is exactly It says, the position of red light emitting layer can be set to, improve color visual angle change rate and red efficiency, green efficiency and blue effect At least one of rate.Therefore, in the present embodiment, it is possible to provide first be set between first electrode and second electrode shines Portion and the second illumination region being set on the first illumination region, at least one of first and second illumination regions may be configured with including red At least two luminescent layers of color luminescent layer, and the position of red light emitting layer can be set to improve color reproduction rate and red effect At least one of rate, green efficiency and blue efficiency.In addition, according to the present embodiment, having by being applied to two illumination regions The TER-TEP structures of three peak values improve luminous efficiency, excitation purity and color reproduction rate or color visual angle.
Substrate 701 can be formed by insulating materials or with material flexible.Substrate 701 can be by glass, metal or plastics shape At but it is not limited to this.When oganic light-emitting display device is flexible oganic light-emitting display device, substrate 701 can be by such as moulding The flexible material of material etc is formed.
First electrode 702 is to provide the anode in hole, and can be by as the saturating of such as transparent conductive oxide (TCO) etc Tin indium oxide (ITO) or indium zinc oxide (IZO) formation of bright conductive material.However, present embodiment is without being limited thereto.
Second electrode 704 is to provide the cathode of electronics, and can by as metal material gold (Au), silver-colored (Ag), aluminium (Al), Molybdenum (Mo) or magnesium (Mg) formation, or can be formed by their alloy.However, present embodiment is without being limited thereto.
Each of first electrode 702 and second electrode 704 can be described as anode or cathode.
First illumination region 710 may include the first HTL 712 being located in first electrode 702, the first EML 714, the 2nd EML 715 and the first ETL 716.
Although being not shown, HIL can be further formed in first electrode 702.
And it can be in the first and second EML via the electronics of the first ETL 716 offers via the holes provided the first HIL 712 It is recombinated in 714 and 715, to shine.
First HTL 712 can be formed by two or more layers or two or more materials.
First ETL 716 can be formed by two or more layers or two or more materials.
It can be further formed HBL on the 2nd EML 715.First ETL 716 and HBL can be used as one layer or single layer carries For.
It can be further formed EBL below the first EML 714.First HTL 712 and EBL can be used as one layer or single layer carries For.
Second illumination region 720 may include the 2nd HTL 722, the first EML 724 and the 2nd ETL726.
Although being not shown, in the second illumination region 720, EIL can be further formed on the 2nd ETL 726.In addition, the Two illumination regions 720 can further comprise HIL.
2nd HTL 722 can be formed by material identical with the first HTL 712, and but it is not limited to this.
2nd HTL 722 can be formed by two or more layers or two or more materials.
2nd ETL 726 can be formed by material identical with the first ETL 716, and but it is not limited to this.
2nd ETL 726 can be formed by two or more layers or two or more materials.
It can be further formed HBL on the first EML 724.2nd ETL 726 and HBL can be used as one layer or single layer carries For.
It can be further formed EBL below the first EML 724.2nd HTL 722 and EBL can be used as one layer or single layer carries For.
It can be further formed CGL 740 between the first illumination region 710 and the second illumination region 720.CGL740 adjustable the Charge balance between one illumination region 710 and the second illumination region 720.CGL 740 may include N-type CGL and p-type CGL.
N-type CGL can be by alkali metal wherein doped with such as lithium (Li), sodium (Na), potassium (K) or caesium (Cs) etc or all If the organic layer of the alkaline-earth metal of magnesium (Mg), strontium (Sr), barium (Ba) or radium (Ra) etc is formed, but it is not limited to this.
P-type CGL can be formed by the organic layer comprising P-type dopant, and but it is not limited to this.
CGL 740 can be formed by single layer.
First EML 714 of the first illumination region 710 is formed as blue light-emitting layer, and the 2nd EML 715 is formed as red Luminescent layer.Therefore, the blue light-emitting layer as the first EML 714 can be set to than the red light emitting layer as the second EML 715 Closer to first electrode 702, at least so as to improve color visual angle change rate and red efficiency, green efficiency and blue efficiency One of.When with 440nm to 480nm, i.e. the luminescence peak of the light-emitting zone of blue light-emitting layer and with 600nm to 650nm is that is, red When the luminescence peak transmitting light of the light-emitting zone of luminescent layer, maximal efficiency is obtained in the white area of contour map.Work as blue When luminescent layer is arranged to than red light emitting layer closer to first electrode 702, it is expected that the luminescence peak of light-emitting zone emits light.By In this structure, blue light-emitting layer and red light emitting layer each luminous intensity and color reproduction rate increase.
In addition, in addition to blue light-emitting layer, the first EML 714 of the first illumination region 710 is formed as navy blue luminescent layer Or sky blue luminescent layer.2nd EML 715 of the first illumination region 710 is formed as red light emitting layer.Therefore, the first illumination region The luminescence peak of 710 light-emitting zone can be located in the range of 440nm to 650nm.
First EML 724 of the second illumination region 720 is formed as yellow green luminescent layer or green light emitting layer.First EML The luminescence peak of 724 light-emitting zone can be located in the range of 510nm to 580nm.
Therefore, had according to the white organic light emitting device of the tenth embodiment of the invention and show three luminescence peaks Structure, wherein the first illumination region may be configured with red light emitting layer and blue light-emitting layer to improve the efficiency of red light emitting layer, Second illumination region may be configured with green light emitting layer to improve the efficiency of green light emitting layer.It is based on that is the present invention can apply Two illumination regions and have the structure there are three luminescence peak.Therefore, according to the present embodiment, by changing using TER-TEP structures It has been apt to luminous efficiency, excitation purity and color reproduction rate or color visual angle.
Here, because the first illumination region is configured with blue light-emitting layer and red light emitting layer, blue light-emitting layer shines The luminescence peak in region is located in the range of 440nm to 480nm, and the luminescence peak of the light-emitting zone of red light emitting layer is located at In the range of 600nm to 650nm.In addition, because the second illumination region is configured with yellow green luminescent layer, yellow green luminescent layer The luminescence peak of light-emitting zone is located in the range of 540nm to 580nm.Therefore, TER-TEP structures can be based on first and the Two illumination regions and have the structure there are three luminescence peak.That is TER-TEP structures may include having based on two illumination regions The structure of three luminescence peaks.
Therefore, in the white organic light emitting device according to the tenth embodiment of the invention, the first illumination region is configurable There are blue light-emitting layer and red light emitting layer.In addition, the energy gap of red light emitting layer can be set as the energy gap more than blue light-emitting layer, to Blue light-emitting layer and the red light emitting layer luminous efficiency of each are improved, and reduces driving voltage.In addition, being wrapped in red light emitting layer The matrix with the wavelength shorter than red wavelength can be used in the matrix contained, each to improve blue light-emitting layer and red light emitting layer A luminous efficiency simultaneously reduces driving voltage.Short wavelength's matrix can be blue or green matrix.
Bottom emission type is can be applied to according to the white organic light emitting device of the tenth embodiment of the invention, but and unlimited In this.Top emission type or dual-side emissive are can be applied to according to the white organic light emitting device of the tenth embodiment of the invention Type.In top emission type or dual-side emissive type, the position of luminescent layer can be changed according to the characteristic or structure of device.Institute as above It states, when setting includes two luminescent layers of red light emitting layer, the luminous intensity or color visual angle change rate of luminescent layer are by red The position of luminescent layer influences.Therefore, in the white organic light emitting device of the present invention, luminous intensity or face that can be based on luminescent layer The position of red light emitting layer is arranged in color visual angle change rate, so as to improve color visual angle change rate and red efficiency, green efficiency At least one of with blue efficiency.In addition, can be by adjusting the energy gap in red light emitting layer between the matrix for including and dopant And the energy gap in blue light-emitting layer between the matrix for including and dopant realizes organic light emitting apparatus, to improve blue-light-emitting Layer and red light emitting layer each luminous efficiency and reduce driving voltage.
In including the oganic light-emitting display device according to the white organic light emitting device of tenth embodiment of the invention, Can be arranged on the substrate 701 by it is intersected with each other come limit respectively multiple pixel regions a plurality of grid line and multiple data lines, And a plurality of power cord extended in parallel with grid line or data line, it can be arranged in each of multiple pixel regions and corresponding Grid line and the corresponding data line switching thin-film transistor (TFT) connected and the driving TFT being connect with switch TFT.Drive TFT It can be connect with first electrode 702.
Figure 26 is the schematic cross section for illustrating the white organic light emitting device 800 according to the 11st embodiment of the invention Figure.When describing present embodiment, pair identical as the element according to aforementioned embodiments or corresponding element retouch is not repeated It states.
White organic light emitting device 800 shown in Figure 26 include substrate 801, the first and second electrodes 802 and 804, with And first between the first and second electrodes 802 and 804 arrives third illumination region 810,820 and 830.
Substrate 801 can be formed by insulating materials or with material flexible.Substrate 801 can be by glass, metal or plastics shape At but it is not limited to this.When oganic light-emitting display device is flexible oganic light-emitting display device, substrate 801 can be by such as moulding The flexible material of material etc is formed.
First electrode 802 is to provide the anode in hole, and second electrode 804 is to provide the cathode of electronics.802 He of first electrode Each of second electrode 804 can be described as anode or cathode.
First illumination region 810 may include the first HTL 812 being located in first electrode 802, the first EML 814, the 2nd EML 815 and the first ETL 816.
Although being not shown, HIL can be further formed in first electrode 802.
First HTL 812 can be formed by two or more layers or two or more materials.
First ETL 816 can be formed by two or more layers or two or more materials.
It can be further formed HBL on the 2nd EML 815.First ETL 816 and HBL can be used as one layer or single layer carries For.
It can be further formed EBL below the first EML 814.First HTL 812 and EBL can be used as one layer or single layer carries For.
First EML 814 of the first illumination region 810 is formed as blue light-emitting layer, and the 2nd EML 815 is formed as red Luminescent layer.Therefore, the blue light-emitting layer as the first EML 814 can be set to than the red light emitting layer as the second EML 815 Closer to first electrode 802, at least so as to improve color visual angle change rate and red efficiency, green efficiency and blue efficiency One of.When with 440nm to 480nm, i.e. the luminescence peak of the light-emitting zone of blue light-emitting layer 814 and with 600nm to 650nm, i.e., When the luminescence peak transmitting light of the light-emitting zone of red light emitting layer 815, maximal efficiency is obtained in the white area of contour map. When blue light-emitting layer 814 is arranged to than red light emitting layer 815 closer to first electrode 802, it is expected shining for light-emitting zone Peak emission light.Due to this structure, blue light-emitting layer and red light emitting layer each luminous intensity and color reproduction rate increase.
In addition, in addition to blue light-emitting layer, the first EML 814 of the first illumination region 810 is formed as navy blue luminescent layer Or sky blue luminescent layer.2nd EML 815 of the first illumination region 810 is formed as red light emitting layer.Therefore, the first illumination region The luminescence peak of 810 light-emitting zone can be located in the range of 440nm to 650nm.
Second illumination region 820 may include the 2nd HTL 822, the first EML 824 and the 2nd ETL826.
Although being not shown, in the second illumination region 820, EIL can be further formed on the 2nd ETL 826.In addition, the Two illumination regions 820 can further comprise HIL.
2nd HTL 822 can be formed by material identical with the first HTL 812, and but it is not limited to this.
2nd HTL 822 can be formed by two or more layers or two or more materials.
2nd ETL 826 can be formed by material identical with the first ETL 816, and but it is not limited to this.
2nd ETL 826 can be formed by two or more layers or two or more materials.
It can be further formed HBL on the first EML 824.2nd ETL 826 and HBL can be used as one layer or single layer carries For.
It can be further formed EBL below the first EML 824.2nd HTL 822 and EBL can be used as one layer or single layer carries For.
First EML 824 of the second illumination region 820 is formed as yellow green luminescent layer or green light emitting layer.First EML The luminescence peak of 824 light-emitting zone can be located in the range of 510nm to 580nm.
Moreover, the first EML 824 of the second illumination region 820 is formed as blue light-emitting layer.In addition to blue light-emitting layer, the One EML 824 is formed as navy blue luminescent layer or sky blue luminescent layer.The luminescence peak of the light-emitting zone of first EML 824 can In the range of 440nm to 480nm.
It can be further formed the first CGL 840 between the first illumination region 810 and the second illumination region 820.First CGL 840 Adjustable charge balance between first illumination region 810 and the second illumination region 820.First CGL 840 may include N-type CGL and p-type CGL。
N-type CGL can be by alkali metal wherein doped with such as lithium (Li), sodium (Na), potassium (K) or caesium (Cs) etc or all If the organic layer of the alkaline-earth metal of magnesium (Mg), strontium (Sr), barium (Ba) or radium (Ra) etc is formed, but it is not limited to this.
P-type CGL can be formed by the organic layer comprising P-type dopant, and but it is not limited to this.
First CGL 840 can be formed by single layer.
Third illumination region 830 may include being arranged the 3rd ETL 836, the first EML 834 and below second electrode 804 Three HTL 832.
Although being not shown, third illumination region can further comprise the EIL being arranged on the 3rd ETL 836.In addition, can be into One step forms HIL.
3rd HTL 832 can be by TPD (N, N'- be bis--(3- aminomethyl phenyls)-N, N'- be bis--(phenyl)-benzidine) or NPB (bis- (the phenyl)-benzidine of bis- (naphthalene -1- the bases)-N, N'- of N, N'-) are formed, and but it is not limited to this.
3rd HTL 832 can be formed by two or more layers or two or more materials.
3rd ETL 836 can be formed by oxadiazoles, phenanthroline, benzoxazoles or benzothiazole, and but it is not limited to this.
3rd ETL 836 can be formed by two or more layers or two or more materials.
It can be further formed the 2nd CGL 850 between the second illumination region 820 and third illumination region 830.2nd CGL 850 Adjustable charge balance between second illumination region 820 and third illumination region 830.2nd CGL 850 may include N-type CGL and p-type CGL。
N-type CGL can inject electronics into the second illumination region 820, and p-type CGL can inject hole into third illumination region 830.
N-type CGL can be by alkali metal wherein doped with such as lithium (Li), sodium (Na), potassium (K) or caesium (Cs) etc or all If the organic layer of the alkaline-earth metal of magnesium (Mg), strontium (Sr), barium (Ba) or radium (Ra) etc is formed, but it is not limited to this.
P-type CGL can be formed by the organic layer comprising P-type dopant, and but it is not limited to this.First CGL 840 can be by with The identical material of N-type CGL and p-type CGL of two CGL 850 is formed, and but it is not limited to this.2nd CGL 850 can be by single layer shape At.
First EML 834 of third illumination region 830 is formed as blue light-emitting layer.In addition to blue light-emitting layer, the first EML 834 are formed as navy blue luminescent layer or sky blue luminescent layer.The luminescence peak of the light-emitting zone of first EML834 can be located at In the range of 440nm to 480nm.When the first EML 834 of third illumination region 830 is formed as blue light-emitting layer, second shines First EML824 in portion 820 is formed as yellow green luminescent layer or green light emitting layer.In this case, the second illumination region 820 There can be the luminescence peak being located in 510nm to 580nm ranges, third illumination region 830, which can have, is located at 440nm to 480nm models Enclose interior luminescence peak.
In addition, the first EML 834 of third illumination region 830 is formed as yellow green luminescent layer or green light emitting layer.First The luminescence peak of the light-emitting zone of EML 834 can be located in the range of 510nm to 580nm.When the first of third illumination region 830 When EML 834 is formed as yellow green luminescent layer or green light emitting layer, the first EML 824 of the second illumination region 820 is formed as indigo plant Color luminescent layer.In this case, the second illumination region 820 can have the luminescence peak being located in 440nm to 480nm ranges, the Three illumination regions 830 can have the luminescence peak being located in 510nm to 580nm ranges.
Here, because the first illumination region is configured with red light emitting layer and blue light-emitting layer, red light emitting layer shines The luminescence peak in region is located in the range of 600nm to 650nm, and the luminescence peak of the light-emitting zone of blue light-emitting layer is located at In the range of 440nm to 480nm.In addition, because the second illumination region is configured with yellow green luminescent layer or green light emitting layer, it is yellow The luminescence peak of the light-emitting zone of green light emitting layer or green light emitting layer is located in the range of 510nm to 580nm.In addition, because Third illumination region is configured with blue light-emitting layer, so the luminescence peak of the light-emitting zone of blue light-emitting layer is located at 440nm to 480nm In the range of.Therefore, because first and third illumination region each be configured with blue light-emitting layer, so the hair of blue light-emitting layer Photopeak value is rendered as a luminescence peak at 440nm to 480nm, thus, since first arrives third illumination region, realizing has The TER-TEP structures of three illumination regions.
Selectively, because the first illumination region is configured with red light emitting layer and blue light-emitting layer, red light emitting layer The luminescence peak of light-emitting zone is located in the range of 600nm to 650nm, and the luminescence peak position of the light-emitting zone of blue light-emitting layer In the range of 440nm to 480nm.In addition, because the second illumination region is configured with blue light-emitting layer, the hair of blue light-emitting layer The luminescence peak in light region is located in the range of 440nm to 480nm.In addition, because third illumination region shines configured with yellow green Layer or green light emitting layer, so the luminescence peak of the light-emitting zone of yellow green luminescent layer or green light emitting layer is arrived positioned at 510nm In the range of 580nm.Therefore, because each of the first and second illumination regions is configured with blue light-emitting layer, so blue-light-emitting The luminescence peak of layer is rendered as a luminescence peak at 440nm to 480nm, thus since first arrives third illumination region, realizes There are three the TER-TEP structures of luminescence peak for tool.
Selectively, because the first illumination region is configured with red light emitting layer and blue light-emitting layer, red light emitting layer The luminescence peak of light-emitting zone is located in the range of 600nm to 650nm, and the luminescence peak position of the light-emitting zone of blue light-emitting layer In the range of 440nm to 480nm.In addition, because the second illumination region is configured with yellow green luminescent layer or green light emitting layer, The luminescence peak of the light-emitting zone of yellow green luminescent layer or green light emitting layer is located in the range of 510nm to 580nm.In addition, because It is configured with blue light-emitting layer for third illumination region, so the luminescence peak of the light-emitting zone of blue light-emitting layer is arrived positioned at 440nm In the range of 480nm.Therefore, because first and third illumination region each be configured with blue light-emitting layer, so blue-light-emitting Two luminescence peaks are rendered as at 440nm to 480nm for the luminescence peak of layer or the luminescence peak of blue light-emitting layer exists The places 440nm to 480nm are rendered as two different luminescence peaks.Therefore, because first arrives third illumination region, four hairs are provided Photopeak value.That is due to three illumination regions, TER-TEP structures include that there are four the structures of luminescence peak for tool.
Selectively, because the first illumination region is configured with red light emitting layer and blue light-emitting layer, red light emitting layer The luminescence peak of light-emitting zone is located in the range of 600nm to 650nm, and the luminescence peak position of the light-emitting zone of blue light-emitting layer In the range of 440nm to 480nm.In addition, because the second illumination region is configured with blue light-emitting layer, the hair of blue light-emitting layer The luminescence peak in light region is located in the range of 440nm to 480nm.In addition, because third illumination region shines configured with yellow green Layer or green light emitting layer, so the luminescence peak of the light-emitting zone of yellow green luminescent layer or green light emitting layer is arrived positioned at 510nm In the range of 580nm.Therefore, because each of the first and second illumination regions is configured with blue light-emitting layer, so blue-light-emitting Two luminescence peaks are rendered as at 440nm to 480nm for the luminescence peak of layer or the luminescence peak of blue light-emitting layer exists The places 440nm to 480nm are rendered as two different luminescence peaks.Therefore, because first arrives third illumination region, four hairs are provided Photopeak value.That is due to three illumination regions, TER-TEP structures include that there are four the structures of luminescence peak for tool.
Therefore, in the white organic light emitting device according to the 11st embodiment of the invention, the first illumination region can match It is equipped with blue light-emitting layer and red light emitting layer.In addition, the energy gap between the matrix for including in red light emitting layer and dopant can be set For more than the energy gap between the matrix and dopant for including in blue light-emitting layer, to improve blue light-emitting layer and red light emitting layer The luminous efficiency of each, and reduce driving voltage.Have than red wave in addition, the matrix for including in red light emitting layer can be used The matrix of the wavelength of length, to improve blue light-emitting layer and red light emitting layer each luminous efficiency and reduce driving electricity Pressure.Short wavelength's matrix can be blue or green matrix.
Bottom emission type is can be applied to according to the white organic light emitting device of the 11st embodiment of the invention, but not It is limited to this.Top emission type or bilateral hair are can be applied to according to the white organic light emitting device of the 11st embodiment of the invention Light type.In top emission type or dual-side emissive type, the position of luminescent layer can be changed according to the characteristic or structure of device.Institute as above It states, when setting includes two luminescent layers of red light emitting layer, the luminous intensity or color visual angle change rate of luminescent layer are by red The position of luminescent layer influences.Therefore, in the white organic light emitting device of the present invention, luminous intensity or face that can be based on luminescent layer The position of red light emitting layer is arranged in color visual angle change rate, so as to improve color visual angle change rate and red efficiency, green efficiency At least one of with blue efficiency.In addition, can be by adjusting the energy gap in red light emitting layer between the matrix for including and dopant And the energy gap in blue light-emitting layer between the matrix for including and dopant realizes organic light emitting apparatus, to improve blue-light-emitting Layer and red light emitting layer each luminous efficiency and reduce driving voltage.
It is including oganic light-emitting display device according to the white organic light emitting device of 11st embodiment of the invention In, it can be arranged on substrate 801 by intersected with each other come a plurality of grid line for limiting multiple pixel regions respectively and a plurality of data Line and a plurality of power cord extended in parallel with grid line or data line, can be arranged in each of multiple pixel regions with Respective gates line and the corresponding data line switching thin-film transistor (TFT) connected and the driving TFT being connect with switch TFT.It drives Dynamic TFT can be connect with first electrode 802.
The equipment energy characteristic that the white organic light emitting device of measurement Figure 26 will be passed through with reference to table 7 and 8 and Figure 27 detailed descriptions The result of acquisition.
When provided red light emitting layer and blue-light-emitting according to embodiment of the present invention above with reference to as described in table 6 and Figure 23 When layer, it can be seen that the luminous efficiency of red light emitting layer is kept, and the luminous efficiency of blue light-emitting layer improves.As this feelings Shape as a result, table 7 and 8 and Figure 27 show the white organic light emitting device for being suitable for equipment energy characteristic, because of emitting red light The luminous efficiency of layer does not have to reduce and the red light emitting layer and blue light-emitting layer luminous intensity increase of each.
Following table 7 shows red efficiency and red chromaticity coordinates.
Table 7
Structure Red efficiency Red chromaticity coordinates
Comparative example 100% 0.660,0.336
Embodiment 10 122% 0.668,0.329
Embodiment 11 116% 0.665,0.331
In the comparative example of table 7, the luminescent layer of the first illumination region is formed as blue light-emitting layer, the luminescent layer of the second illumination region Be formed as yellow green luminescent layer, and the luminescent layer of third illumination region is formed as blue light-emitting layer.
In embodiment 10, the first luminescent layer of the first illumination region is blue light-emitting layer, and the second of the first illumination region Luminescent layer is red light emitting layer, and red light emitting layer includes the embodiment 8-2 and embodiment party for respectively referring to the description of table 5 and 6 above The green matrix and Red dopants of formula 9-2.In addition, the luminescent layer of the second illumination region is formed as yellow green luminescent layer, and third The luminescent layer of illumination region is formed as blue light-emitting layer.
In embodiment 11, the first luminescent layer of the first illumination region is blue light-emitting layer, and the second of the first illumination region Luminescent layer is red light emitting layer, and red light emitting layer includes the embodiment 8-2 and embodiment party for respectively referring to the description of table 5 and 6 above The blue substrate and Red dopants of formula 9-2.In addition, the luminescent layer of the second illumination region is formed as yellow green luminescent layer, and third The luminescent layer of illumination region is formed as blue light-emitting layer.
As shown in table 7, when the red efficiency of comparative example is 100%, the red efficiency of embodiment 10 is 122%. It can be seen that compared with comparative example, the red efficiency of embodiment 10 increases about 22%.In addition, with reference to red chromaticity coordinates, It is (0.660,0.336) to measure comparative example, and it is (0.668,0.329) to measure embodiment 10.Accordingly, it can be seen that and comparative example It compares, the red chromaticity coordinates of embodiment 10 expands.
And, it can be seen that compared with comparative example, the red efficiency of embodiment 11 increases about 16%.In addition, ginseng Red chromaticity coordinates is examined, it is (0.660,0.336) to measure comparative example, and it is (0.665,0.331) to measure embodiment 11.Therefore, energy Enough find out compared with comparative example, the red chromaticity coordinates of embodiment 11 expands.
Therefore, when an illumination region for having red light emitting layer and blue light-emitting layer to white organic light emitting device application configuration When, present inventors have shown that the luminous efficiency of red light emitting layer and chromaticity coordinates are improved.
Figure 27 is the diagram for the luminous intensity for being displayed in white organic light emitting apparatus.In figure 27, horizontal axis indicates the wavelength of light Range (nm), the longitudinal axis indicate luminous intensity.Luminous intensity can be the relative value being represented as relative to EL spectral maximums Numerical value.
(a) in Figure 27 shows that comparative example and embodiment 10 luminous intensity of each, (b) in Figure 27 are shown Comparative example and embodiment 11 luminous intensity of each.In figure 27, comparative example, embodiment 10 and embodiment 11 are distinguished With structure identical with table 7, thus no longer provide its detailed description.
As shown in (a) and (b) in Figure 27, it can be seen that compared with comparative example, embodiment 10 and 11 it is luminous strong Degree is slightly reduced in 440nm to 480nm at the luminescence peak of the light-emitting zone of blue light-emitting layer.Further, it can be seen that 510nm to 580nm, i.e., at the luminescence peak of the light-emitting zone of yellow green luminescent layer, the luminous intensity of embodiment 10 and 11 is several It is similar with comparative example.Further, it can be seen that compared with comparative example, the luminous intensity of embodiment 10 and 11 is arrived in 600nm 650nm increases that is, at the luminescence peak of the light-emitting zone of red light emitting layer.
Therefore, when to white organic light emitting device application blue light-emitting layer and red light emitting layer, it can be seen that blue hair The luminous intensity of photosphere and the luminous intensity of red light emitting layer increase.
Table 8 shows the quantum efficiency by the comparative example and embodiment that measure white organic light emitting device, DCI colors again The result that now rate (DCI color spaces satisfaction or DCI coverage rates) and brightness are obtained.
Here, DCI color reproduction rates can be described as DCI color space satisfactions.The TV developed at present is required to meet DCI P3 colors Domain extends about 130% than existing sRGB, to show apparent and true to nature image.DCI P3 can be rgb color sky Between, and can be described as representing the color reproduction rate of the color space than sRGB wide.However, DCI P3 are without being limited thereto.Color reproduction rate can claim For color space, color region, color reproduction region, color reproduction range or colour gamut.In addition, according to the hair of the requirement of consumer and product Exhibition, color reproduction rate may change in range, and various terms can be used.It is set with display in addition, coverage rate can be described as DCI The overlapping range of standby color space.
Table 8
Structure EQE (%) DCI color reproductions rate (%) Brightness (%)
Comparative example 34.7 88% 100%
Embodiment 10 34.6 92% 111%
Embodiment 11 34.5 91% 118%
As shown in table 8, it can be seen that in terms of the external quantum efficiency " EQE ", comparative example 34.7%, embodiment 10 is 34.6%, embodiment 11 is 34.5%.Accordingly, it can be seen that embodiment 10 and 11 external quantum efficiencys " EQE " of each It almost keeps identical as comparative example.Accordingly, it can be seen that even if when an illumination region configuration is there are two when luminescent layer, outer quantum is imitated Rate " EQE " will not reduce, it is thus achieved that the organic light emitting apparatus that quantum efficiency will not reduce.
Moreover, when DCI color reproductions rate (DCI color spaces satisfaction or DCI coverage rates) is 100%, provide most clear Clear picture quality.As shown in table 8, it can be seen that in terms of DCI color reproduction rates, comparative example 88%, embodiment 10 is 92%, embodiment 11 is 91%.It can be seen that compared with comparative example, the DCI color reproduction rates of embodiment 10 and 11 are further It improves.This is because increasing with red coloration and the green excitation purity of each, DCI color reproduction rates increase.Accordingly, it can be seen that i.e. Make when an illumination region configuration is there are two when luminescent layer, DCI color reproductions rate will not reduce, it is thus achieved that DCI color reproduction rates The organic light emitting apparatus of raising.Further, it can be seen that by application according to the structure of embodiment of the present invention, DCI color reproduction rates It is about 91% to about 92%.That is, it can be seen that it provides organic with picture quality more clearer than comparative example Light-emitting display apparatus.
As brightness result of the comparison, it can be seen that compared with comparative example, the brightness of embodiment 10 and 11 improves About 11% to about 18%.Accordingly, it can be seen that even if when there are two brightness when luminescent layer for an illumination region configuration It will not reduce, it is thus achieved that the organic light emitting apparatus that brightness improves.
As described above, according to the embodiment of the present invention, it includes emitting red light that at least one of two illumination regions, which are configured with, Two luminescent layers of layer, and set improving the position of red light emitting layer to color visual angle change rate and red efficiency, green At least one of colour efficiency and blue efficiency.
Moreover, according to the embodiment of the present invention, it includes red light emitting layer that at least one of three illumination regions, which are configured with, Two luminescent layers, and set the position of red light emitting layer to improvement color visual angle change rate and red efficiency, green effect At least one of rate and blue efficiency.
Moreover, according to the embodiment of the present invention, red light emitting layer, thus red light emitting layer are added in an illumination region Luminous intensity increase, which thereby enhance the luminous efficiency of red light emitting layer.
Moreover, according to the embodiment of the present invention, there are two luminescent layers (for example, blue light-emitting layer for an illumination region configuration And red light emitting layer), and blue light-emitting layer is arranged to than red light emitting layer, closer to first electrode, thus improve the hair of luminescent layer Luminous intensity and color reproduction rate or color visual angle.
Moreover, according to the embodiment of the present invention, it is red because being added to red light emitting layer in an illumination region Excitation purity increase, and DCI coverage rates expand.Therefore, the TV with large scale screen provides clearer image.
Moreover, including two luminescent layers in an illumination region according to the embodiment of the present invention, and adjust two hairs Thus energy gap between the matrix for including in photosphere and dopant improves the brightness and color reproduction rate of organic light emitting apparatus.
Moreover, including two luminescent layers in an illumination region according to the embodiment of the present invention, and adjust two hairs Energy gap between the matrix for including in photosphere and dopant.Therefore, it when an illumination region includes two luminescent layers, improves Blue light-emitting layer and the red light emitting layer luminous efficiency of each, and reduce driving voltage.
Moreover, according to the embodiment of the present invention, although providing luminescent layer there are two one illumination region configurations of one kind, The organic light emitting apparatus that driving voltage will not increase and quantum efficiency will not reduce.
Moreover, according to the embodiment of the present invention, by the way that three illumination region application tools, there are three the TER- of luminescence peak TEP structures improve luminous efficiency, excitation purity and color reproduction rate or color visual angle.
Figure 28 is the diagram for illustrating the oganic light-emitting display device 1000 according to embodiment of the present invention, and use is according to this Invent the above-mentioned organic light emitting apparatus of second to the 11st embodiment.
As shown in Figure 28, include substrate 10, film according to the oganic light-emitting display device of embodiment of the present invention 1000 Transistor TFT, coat 1150, first electrode 102, illumination region 1180 and second electrode 104.TFT include gate electrode 1115, Gate insulator 1120, semiconductor layer 1131, source electrode 1133 and drain electrode 1135.
In Figure 28, thin film transistor (TFT) TFT is shown with reverse stagger structure (inverted staggered Structure), but thin film transistor (TFT) TFT can be formed with coplanar structure.
Substrate 10 can be formed by insulating materials or with material flexible.Substrate 10 can be formed by glass, metal or plastics, But it is not limited to this.When oganic light-emitting display device is flexible oganic light-emitting display device, substrate 10 can by such as plastics it The flexible material of class is formed.
Gate electrode 1115 may be formed on substrate 10 and can be connect with grid line (not shown).Gate electrode 1115 can wrap Include by least one of molybdenum (Mo), aluminium (Al), chromium (Cr), golden (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu) or it Alloy formed multilayer.
Gate insulator 1120 may be formed on gate electrode 1115 and can be by Si oxide (SiOx), silicon nitride (SiNx) or their multilayer is formed, and but it is not limited to this.
Semiconductor layer 1131 may be formed on gate insulator 1120 and can be by non-crystalline silicon (a-Si), polysilicon (poly- Si), oxide semiconductor or organic semiconductor are formed.When semiconductor layer 1131 is formed by oxide semiconductor, semiconductor layer 1131 can be formed by tin indium oxide (ITO), indium zinc oxide (IZO) or indium tin zinc oxide (ITZO), and but it is not limited to this.In addition, Etch stopper (not shown) can be formed on semiconductor layer 1131, etch stopper can protect semiconductor layer 1131, but can root Etch stopper is omitted according to the construction of device.
Source electrode 1133 and drain electrode 1135 may be formed on semiconductor layer 1131.Source electrode 1133 and drain electrode electricity Pole 1135 can be formed by single layer or multilayer, and can be by molybdenum (Mo), aluminium (Al), chromium (Cr), golden (Au), titanium (Ti), nickel (Ni), neodymium (Nd) it is formed at least one of copper (Cu) or their alloy.
Passivation layer 1140 may be formed on source electrode 1133 and drain electrode 1135 and can by SiOx, SiNx or they Multilayer is formed.Selectively, passivation layer 1140 can be formed by acryl resin or polyimide resin, and but it is not limited to this.
Color layer 1145 may be formed on passivation layer 1140, although only showing a sub-pixel, color layer in figure 1145 may be formed in each of red sub-pixel, blue subpixels and green sub-pixels.Color layer 1145 may include being schemed Case and red (R) colour filter, green (G) colour filter and blue (B) colour filter of formation in each sub-pixel.Color layer 1145 only transmit from the light with determining wavelength among the white light that illumination region 1180 emits.
Coat 1150 may be formed on color layer 1145 and can be by acryl resin, polyimide resin, SiOx, SiNx Or their multilayer is formed, but it is not limited to this.
First electrode 102 may be formed on coat 1150.First electrode 102 can be by being formed in passivation layer 1140 and applying Contact hole CH in the determination region of coating 1150 is electrically connected with drain electrode 1135.In Figure 28, drain electrode 1135 is shown It is shown as being electrically connected with first electrode 102, but present embodiment is not limited to this.As another example, source electrode 1133 can It is electrically connected with first electrode 102 by the contact hole CH being formed in the determination region of passivation layer 1140 and coat 1150.
Dike layer 1170 may be formed in first electrode 102 and can limit pixel region.That is dike layer 1170 may be formed at In borderline region between multiple pixels, thus pixel region is limited by dike layer 1170.Dike layer 1170 can be by such as benzo ring The organic material of butylene (BCB) resin, acryl resin or polyimide resin etc is formed.Selectively, dike layer 1170 can It is formed by the light-sensitive material comprising black pigment, in this case, dike layer 1170 can be used as light-blocking member.
Illumination region 1180 may be formed on dike layer 1170.As shown in second to the 11st embodiment of the present invention, Illumination region 1180 may include the first illumination region being formed in first electrode 102, the second illumination region and third illumination region.It may be selected Ground, illumination region 1180 may include the first illumination region and the second illumination region.
Second electrode 104 may be formed on illumination region 1180.
Although being not shown in Figure 28, encapsulation part can be formed in second electrode 104.Encapsulation part prevent moisture infiltration to shine In portion 1180.Encapsulation part may include the multiple layers for being laminated with different inorganic material, or may include alternately laminated organic and/or inorganic materials With multiple layers of organic material.In addition, package substrate can be further formed in encapsulation part.Package substrate can be by glass, plastics Or metal is formed.Package substrate can attach to encapsulation part by binder.
As described above, according to the embodiment of the present invention, it includes emitting red light that at least one of three illumination regions, which are configured with, Two luminescent layers of layer, and set improving the position of red light emitting layer to color visual angle change rate and red efficiency, green At least one of colour efficiency and blue efficiency.
Moreover, according to the embodiment of the present invention, it includes red light emitting layer that at least one of two illumination regions, which are configured with, Two luminescent layers, and set the position of red light emitting layer to improvement color visual angle change rate and red efficiency, green effect At least one of rate and blue efficiency.
Moreover, according to the embodiment of the present invention, red light emitting layer, thus red light emitting layer are added in an illumination region Luminous intensity increase, which thereby enhance the luminous efficiency of red light emitting layer.
Moreover, according to the embodiment of the present invention, there are two luminescent layers (for example, blue light-emitting layer for an illumination region configuration And red light emitting layer), and blue light-emitting layer is arranged to than red light emitting layer, closer to first electrode, thus improve the hair of luminescent layer Luminous intensity and color reproduction rate or color visual angle.
Moreover, according to the embodiment of the present invention, there are two luminescent layers (for example, blue light-emitting layer for an illumination region configuration And red light emitting layer), and blue light-emitting layer is arranged to than red light emitting layer, closer to second electrode, thus improve the hair of luminescent layer Luminous intensity and color reproduction rate or color visual angle.
Moreover, according to the embodiment of the present invention, red light emitting layer is added in an illumination region, and pass through application green The excitation purity of luminescent layer, red excitation purity and green increases, and digital movie advocates the expansion of organizational norms (DCI) coverage rate. Therefore, the TV (TV) with large scale screen provides clearer image.
Moreover, including two luminescent layers in an illumination region according to the embodiment of the present invention, and adjust two hairs Thus energy gap between the matrix for including in photosphere and dopant improves the brightness and color reproduction rate of organic light emitting apparatus.
Moreover, including two luminescent layers in an illumination region according to the embodiment of the present invention, and adjust two hairs Energy gap between the matrix for including in photosphere and dopant.Therefore, it when an illumination region includes two luminescent layers, improves Blue light-emitting layer and the red light emitting layer luminous efficiency of each, and reduce driving voltage.
Moreover, according to the embodiment of the present invention, although providing luminescent layer there are two one illumination region configurations of one kind, The organic light emitting apparatus that driving voltage will not increase and quantum efficiency will not reduce.
Moreover, according to the embodiment of the present invention, by the way that three illumination region application tools, there are three three hairs of luminescence peak Light region-three luminescence peaks (TER-TEP) structure, improves luminous efficiency, excitation purity and color reproduction rate or color visual angle.
In the double-deck stack structure, each of the first and second illumination regions can have one or more illumination regions, thus whole Two or more luminescence peaks are provided on body.In addition, in three stepped constructions, each of first to third illumination region can have There are one or multiple illumination regions, thus provide three or more luminescence peaks on the whole.
The effect of the present invention is not limited to foregoing teachings, but one of ordinary skill in the art will be clear that as described above Ground understands other effects not described herein.
The details of the present invention described in technical problem, technical solution and advantageous effect is not to refer in particular to necessity of claim Feature, thus the details described in detailed description of the invention book does not limit the range of claims.
Without departing from the spirit or scope of the present invention, the present invention can carry out various modifications and change, this for It is obvious for one of ordinary skill in the art.Thus, the invention is intended to cover fall into scope and In its equivalency range to the present invention all modifications and variation.

Claims (28)

1. a kind of white organic light emitting device, including：
The first illumination region between first electrode and second electrode；
The second illumination region on first illumination region；With
Third illumination region on second illumination region,
At least one of wherein described first illumination region, the second illumination region and third illumination region include having red light emitting layer extremely Few two luminescent layers, and
The position of the red light emitting layer is arranged to improve color reproduction rate and red efficiency, green efficiency and blue efficiency At least one,
The wherein described red light emitting layer is included in one of first illumination region and the third illumination region, and does not wrap It includes in the other in which of first illumination region and the third illumination region, and first illumination region and the third Each of illumination region includes blue light-emitting layer, and includes first illumination region and third hair of the red light emitting layer One of light portion tool there are two luminescence peak, described two luminescence peaks be located in the range of 440nm to 480nm with And in the range of 600nm to 650nm,
Matrix in the wherein described red light emitting layer includes the matrix with the wave-length coverage shorter than red wavelength range, to improve The luminous efficiency of each of blue light-emitting layer and the red light emitting layer in the illumination region with the red light emitting layer is simultaneously Reduce driving voltage.
2. white organic light emitting device according to claim 1, wherein including described at least two in first illumination region When a luminescent layer, blue light-emitting layer in first illumination region than the red light emitting layer closer to the first electrode, Described in first electrode be anode.
3. white organic light emitting device according to claim 2, wherein shining than described first with the red light emitting layer The situation of blue light-emitting layer closer to the first electrode in portion is compared, the blue light-emitting layer ratio in first illumination region Closer in the situation of the first electrode, color visual angle is improved the red light emitting layer.
4. white organic light emitting device according to claim 1, wherein including described at least two in the third illumination region When a luminescent layer, blue light-emitting layer in the third illumination region than the red light emitting layer closer to the second electrode, Described in second electrode be cathode.
5. white organic light emitting device according to claim 4, wherein shining than the third with the red light emitting layer The situation of blue light-emitting layer closer to the second electrode in portion is compared, the blue light-emitting layer ratio in the third illumination region Closer in the situation of the second electrode, color visual angle is improved the red light emitting layer.
6. white organic light emitting device according to claim 1, wherein first illumination region and the third illumination region Each in blue light-emitting layer include at least one of navy blue luminescent layer and sky blue luminescent layer.
7. white organic light emitting device according to claim 2, wherein the matrix in the red light emitting layer and dopant Between energy gap be more than with the red light emitting layer illumination region in blue light-emitting layer in matrix and dopant between Energy gap has each of the blue light-emitting layer and the red light emitting layer in the illumination region of the red light emitting layer with raising Luminous efficiency simultaneously reduces driving voltage.
8. white organic light emitting device according to claim 7, wherein
The energy gap of the matrix in blue light-emitting layer in illumination region with the red light emitting layer is 2.8eV to 3.2eV, and
The energy gap of the dopant in blue light-emitting layer in illumination region with the red light emitting layer is 2.6eV to 3.0eV.
9. white organic light emitting device according to claim 7, wherein
The energy gap of matrix in the red light emitting layer is 2.6eV to 3.0eV, and
The energy gap of dopant in the red light emitting layer is 1.8eV to 2.2eV.
10. white organic light emitting device according to claim 7, wherein
The matrix in blue light-emitting layer in illumination region with the red light emitting layer and the energy gap between dopant are less than etc. In 0.4eV, and
The energy gap between matrix and dopant in the red light emitting layer is more than 0.4eV and is less than or equal to 1.2eV.
11. white organic light emitting device according to claim 1, wherein second illumination region include green light emitting layer and At least one of yellow green luminescent layer.
12. white organic light emitting device according to claim 11, wherein
The luminescence peak of the green light emitting layer is located in the range of 510nm to 570nm, and
The luminescence peak of the yellow green luminescent layer is located in the range of 540nm to 580nm.
13. white organic light emitting device according to claim 11, wherein the wavelength of the green light emitting layer is shorter than described The wavelength of yellow green luminescent layer, to improve green efficiency.
14. a kind of white organic light emitting device, including：
The first illumination region between first electrode and second electrode；
The second illumination region on first illumination region；With
Third illumination region on second illumination region,
Wherein
At least one of first illumination region, the second illumination region and third illumination region include having shining for red light emitting layer Layer, to improve luminous efficiency and color reproduction rate, and
First illumination region, the second illumination region and third illumination region include three with three or more luminescence peaks luminous Region-three luminescence peaks (TER-TEP) structure,
The wherein described red light emitting layer is included in one of first illumination region and the third illumination region, and does not wrap It includes in the other in which of first illumination region and the third illumination region, and first illumination region and the third Each of illumination region includes blue light-emitting layer,
Matrix in the wherein described red light emitting layer includes the matrix with the wave-length coverage shorter than red wavelength range, to improve The luminous efficiency of each of blue light-emitting layer and the red light emitting layer in the illumination region with the red light emitting layer is simultaneously Reduce driving voltage.
15. white organic light emitting device according to claim 14, wherein first illumination region includes the red hair Photosphere.
16. white organic light emitting device according to claim 15, wherein with the red light emitting layer than first hair The situation of blue light-emitting layer closer to the first electrode in light portion is compared, the blue light-emitting layer in first illumination region Than the red light emitting layer closer in the situation of the first electrode, color visual angle is improved, wherein the first electrode It is anode.
17. white organic light emitting device according to claim 14, wherein the matrix in the red light emitting layer and doping Energy gap between agent is more than the matrix in the blue light-emitting layer in the illumination region with the red light emitting layer and between dopant Energy gap, with improve with the red light emitting layer illumination region in blue light-emitting layer and the red light emitting layer each Luminous efficiency and reduce driving voltage.
18. white organic light emitting device according to claim 17, wherein
The energy gap of the matrix in blue light-emitting layer in illumination region with the red light emitting layer is 2.8eV to 3.2eV, and
The energy gap of the dopant in blue light-emitting layer in illumination region with the red light emitting layer is 2.6eV to 3.0eV.
19. white organic light emitting device according to claim 17, wherein
The energy gap of matrix in the red light emitting layer is 2.6eV to 3.0eV, and
The energy gap of dopant in the red light emitting layer is 1.8eV to 2.2eV.
20. white organic light emitting device according to claim 17, wherein
The matrix in blue light-emitting layer in illumination region with the red light emitting layer and the energy gap between dopant are less than etc. In 0.4eV, and
The energy gap between matrix and dopant in the red light emitting layer is more than 0.4eV and is less than or equal to 1.2eV.
21. white organic light emitting device according to claim 15, wherein there are two glow peaks for first illumination region tool Value, described two luminescence peaks are located in the range of 440nm to 480nm and in the range of 600nm to 650nm.
22. white organic light emitting device according to claim 21, wherein
Second illumination region has the luminescence peak being located in 510nm to 580nm ranges, and
The third illumination region has the luminescence peak being located in 440nm to 480nm ranges.
23. white organic light emitting device according to claim 21, wherein
Second illumination region has the luminescence peak being located in 440nm to 480nm ranges, and
The third illumination region has the luminescence peak being located in 510nm to 580nm ranges.
24. white organic light emitting device according to claim 14, wherein the third illumination region includes blue light-emitting layer With the red light emitting layer.
25. white organic light emitting device according to claim 24, wherein being sent out than the third with the red light emitting layer The situation of blue light-emitting layer closer to the second electrode in light portion is compared, the blue light-emitting layer in the third illumination region Than the red light emitting layer closer in the situation of the second electrode, color visual angle is improved, wherein the second electrode It is cathode.
26. white organic light emitting device according to claim 24, wherein there are two glow peaks for third illumination region tool Value, described two luminescence peaks are located in the range of 440nm to 480nm and in the range of 600nm to 650nm.
27. white organic light emitting device according to claim 24, wherein
First illumination region has the luminescence peak being located in 440nm to 480nm ranges, and
Second illumination region has the luminescence peak being located in 510nm to 580nm ranges.
28. white organic light emitting device according to claim 24, wherein
First illumination region has the luminescence peak being located in 510nm to 580nm ranges, and
Second illumination region has the luminescence peak being located in 440nm to 480nm ranges.
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