CN105336874B - Organic light emitting diode and its driving method, organic light emitting display - Google Patents
Organic light emitting diode and its driving method, organic light emitting display Download PDFInfo
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- CN105336874B CN105336874B CN201510902268.9A CN201510902268A CN105336874B CN 105336874 B CN105336874 B CN 105336874B CN 201510902268 A CN201510902268 A CN 201510902268A CN 105336874 B CN105336874 B CN 105336874B
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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
- H10K50/80—Constructional details
- H10K50/805—Electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
A kind of Organic Light Emitting Diode, including the 3rd electrode of the side of sandwich construction is arranged at, can be by applying voltage (tertiary voltage) in the 3rd electrode, to cause at least one in first electrode and second electrode to form electric field with the 3rd electrode.By the control to the electric field, electronics and hole can be controlled to merge in required luminescent layer, encourage the luminescent layer to light so as to produce exciton.Above-mentioned Organic Light Emitting Diode includes at least two layers of luminescent layer, and every layer of luminescent layer launches a kind of light of color.By the control to the electric field, electronics and hole can be controlled to merge in any luminescent layer, it is multicolor luminous so as to drive Organic Light Emitting Diode to realize.The driving method and organic light emitting display of a kind of Organic Light Emitting Diode are also disclosed.
Description
Technical field
The present invention relates to organic light emitting display field, more particularly to a kind of Organic Light Emitting Diode and its driving method,
Organic light emitting display.
Background technology
Organic light emitting display is that one kind applies display screen of the Organic Light Emitting Diode (OLED) as luminescent device, is compared
Present main flow flat panel display Thin Film Transistor-LCD (TFT-LCD), organic light emitting display have high contrast
The advantages that degree, wide viewing angle, low-power consumption, thinner volume, it is expected to turn into the flat panel display of future generation after LCD, is current
Attract attention one of most technology in flat panel display.
Traditional OLED is commonly made to laminated construction, and the OLED of this laminated construction can save mask plate, and can carry
High yield.But the OLED of conventional stacked architectures, usually white light OLED, can not realize the display of polychrome.OLED structure
Direction of an electric field be generally all vertical direction in negative electrode and anode, such vertical stratification be present, such as easily
There is electronics or unwanted film layer is gone to up so as to cause luminous exception in hole.
The content of the invention
Based on this, it is necessary to provide Organic Light Emitting Diode and its driving of a kind of laminated construction that can realize multicolor displaying
Method.In addition, also provide a kind of organic light emitting display.
A kind of Organic Light Emitting Diode, it includes first electrode, sandwich construction and the second electrode of stacked on top setting, institute
State sandwich construction and comprise at least two-layer luminescent layer, every layer of luminescent layer launches a kind of light of color, and the sandwich construction can
Launch the light of at least two colors, wherein the Organic Light Emitting Diode also includes the 3rd electrode, the 3rd electrode is positioned at the
The side of one electrode and second electrode.In one of the embodiments, the 3rd electrode is more than in the length on stacked direction
Or the half equal to first electrode, sandwich construction and second electrode superposition thickness.
In one of the embodiments, the sandwich construction includes the first color luminescent layer of the first coloured light of transmitting, transmitting the
Second color luminescent layer of dichroscope and the three-colour light-emitting layer of transmitting three coloured light.
In one of the embodiments, first color, the second color and the 3rd color are red, green and blue any group
Close.
In one of the embodiments, high triplet energy level material layer is additionally provided between the luminescent layer.
In one of the embodiments, the high triplet energy level material layer comprise at least UGH-2, m-CP, CDBP,
TCTEB, CBF one of which material.
A kind of driving method of Organic Light Emitting Diode, applied to above-mentioned Organic Light Emitting Diode, to the described first electricity
Pole applies first voltage, applies second voltage to the second electrode, applies tertiary voltage to the 3rd electrode, to cause
State first electrode and the second electrode and form electric field, at least one in the first electrode and the second electrode and institute
State the 3rd electrode and form electric field.
In one of the embodiments, one of them in the first electrode and the second electrode and the 3rd electrode
Form electric field.
In one of the embodiments, the magnitude of voltage of the tertiary voltage is changing value at least in setting duration.
In one of the embodiments, at least one in the first electrode and the second electrode and the described 3rd
Electrode forms electric field, to encourage default one layer of luminescent layer in the sandwich construction to light.
Above-mentioned Organic Light Emitting Diode, including the 3rd electrode of the side of sandwich construction is arranged at, can be by the 3rd electricity
Pole applies voltage (tertiary voltage), to cause at least one in first electrode and second electrode to form electricity with the 3rd electrode
.By the control to the electric field, electronics and hole can be controlled to merge in required luminescent layer, should so as to produce exciton excitation
Luminescent layer lights.Above-mentioned Organic Light Emitting Diode includes at least two layers of luminescent layer, and every layer of luminescent layer launches a kind of light of color.
By the control to the electric field, electronics and hole can be controlled to merge in any luminescent layer, so as to drive Organic Light Emitting Diode
Realize multicolor luminous.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
The accompanying drawing of other embodiment is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of Organic Light Emitting Diode of the present invention；
Fig. 2 is the structural representation of sandwich construction in Fig. 1.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give presently preferred embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more thorough
Comprehensively.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that the limitation present invention.Term as used herein "and/or" includes one or more related
Listed Items arbitrary and all combination.
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described in detail.
Fig. 1 is the structural representation of Organic Light Emitting Diode, and Fig. 2 is the structural representation of sandwich construction in Fig. 1, please in the lump
Refering to Fig. 1 and Fig. 2.
A kind of Organic Light Emitting Diode, including：It is formed at the first electrode 100 on substrate 10, is formed at first electrode
Sandwich construction 400 on 100, the second electrode 200 being formed on sandwich construction 400 and it is formed at sandwich construction 400
Side the 3rd electrode 300.
" being formed at " in above-mentioned, can be directly formed or indirectly form.Generally use indirectly forms, i.e.,
Also include other dielectric layers therebetween.For example, first electrode 100 is formed on substrate 10, first electrode 100 and substrate
Matcoveredn, such as water oxygen barrier layer can also be included between 10.In another example second electrode 200 be formed at sandwich construction 400 it
On, matcoveredn, such as water oxygen barrier layer can also be included between second electrode 200 and sandwich construction 400.Water oxygen barrier layer can
Think the structure of multilayer, such as including mutually overlapping organic layer and inorganic layer, or the inorganic layer of multilayer.Inorganic layer can be
Metal oxide, such as titanium oxide, magnesia, aluminum oxide, zirconium oxide, tin oxide, can also be the nitride or silicon of silicon
Oxide.Inorganic layer thickness is 50~100nm, and organic layer thickness is 100~200nm.Water oxygen barrier layer can apply atomic layer
Depositing operation (ALD, Atomic layer deposition) formation.
The first electrode 100 is anode, and its material can be indium tin oxide (ITO), and thickness is in 100nm or so.It is described
Second electrode 200 is negative electrode, and its material can be conducting metal (such as silver, magnesium or its alloy), and thickness is in 100nm or so.
In other embodiment, first electrode 100 can also be conducting metal (such as silver), and second electrode 200 can be tin indium oxide
(ITO)。
Sandwich construction 400 is arranged between first electrode 100 and second electrode 200.Sandwich construction 400 includes at least two layers
Luminescent layer, every layer of luminescent layer launch a kind of light of color, and sandwich construction 400 can launch the light of at least two colors.At this
In embodiment, sandwich construction 400 includes three layers of luminescent layer, and every layer of luminescent layer launches a kind of light of color, the energy of sandwich construction 400
The enough light of at least three kinds colors of transmitting.For example, sandwich construction 400 successively include transmitting the first coloured light the first color luminescent layer 410,
Launch the second color luminescent layer 420 of the second coloured light and the three-colour light-emitting layer 430 of transmitting three coloured light.First color, the second color and
3rd color is red, green and any combination of blueness.Such as in the present embodiment, from first electrode 100 to second electrode
200, sandwich construction 400 includes the blue light-emitting layer of transmitting blue light, the green light emitting layer for launching green glow and transmitting feux rouges successively
Red light emitting layer.Certainly, the first color, the second color and the 3rd color can also be that other colors combine.The thickness of luminescent layer can be with
In 20nm~40nm or so, such as 30nm or so；The thickness of sandwich construction 400 can in 100nm~300nm or so, such as
200nm or so.
When electronics and hole are converged to form exciton in luminescent layer, exciton be likely to from activity in the luminescent layer to other
Film layer, such as activity arrive other luminescent layers.Glow color may thus be impacted, the abnormal feelings that light occur
Condition.In order to prevent exciton activity from arriving other film layers, high triplet energy level material layer can be provided between luminescent layer.Example
Such as, high triplet energy level material layer 440 can be provided between the first color luminescent layer 410 and the second color luminescent layer 420,
High triplet energy level material layer 440 is also equipped between two color luminescent layers 420 and three-colour light-emitting layer 430.High triplet energy level
Material layer 440 comprises at least UGH-2, m-CP, CDBP, TCTEB, CBF one of which material.
Usual sandwich construction 400 includes the structures such as electron transfer layer, luminescent layer, hole transmission layer, hole injection layer.Such as
Sandwich construction 400 can include the first lamination 401, the second lamination 402 and luminous layer structure 403, and the first lamination 401 is arranged on
Between one electrode 100 and luminous layer structure 403, the second lamination 402 is arranged between second electrode 200 and luminous layer structure 403.
Luminous layer structure 403 includes the first color luminescent layer 410, the second color luminescent layer 420 and three-colour light-emitting layer 430.Work as first electrode
When 100 be anode, second electrode 200 is negative electrode, the first lamination 401 generally includes hole transmission layer, hole injection layer, and second is folded
Layer 402 generally includes electron transfer layer.
3rd electrode 300 is formed on substrate 10, the side of sandwich construction 400.3rd electrode 300 is in the stacking direction
Length is more than or equal to the half of first electrode, sandwich construction and second electrode superposition thickness.For example, the 3rd electrode 300 exists
Height on stack direction can be equal to the half of first electrode, sandwich construction and second electrode superposition thickness.In order to reach pair
The control of luminescent layer, the 3rd electrode 300 will at least be arranged at the region of the thickness direction of luminous layer structure 403, such as include
The region of first color luminescent layer 410, the second color luminescent layer 420` and the thickness direction of three-colour light-emitting layer 430.First electrode 100,
Should mutual insulating between the electrode 300 of second electrode 200 and the 3rd.
3rd electrode 300 can be conducting metal (such as silver, magnesium or its alloy), can be electrified pressure, such as negative voltage.
So as to when first electrode 100 is anode, second electrode 200 is negative electrode, be formed between first electrode 100 and second electrode 200
Electric field, electric field is also form between first electrode 100 and the 3rd electrode 300, by the control to the electric field, can control electricity
Son and hole merge in required luminescent layer, encourage the luminescent layer to light so as to produce exciton.Above-mentioned Organic Light Emitting Diode bag
Containing at least two layers of luminescent layer, every layer of luminescent layer launches a kind of light of color.By the control to the electric field, electronics can be controlled
Any luminescent layer is merged in hole, it is multicolor luminous so as to drive Organic Light Emitting Diode to realize.
A kind of driving method of Organic Light Emitting Diode applied to above-mentioned Organic Light Emitting Diode of following discloses.
The driving method includes：First voltage V1 is applied to first electrode 100, second voltage is applied to second electrode 200
V2, tertiary voltage V3 is applied to the 3rd electrode 300, to cause first electrode 100 and second electrode 200 to form electric field, the first electricity
At least one in pole 100 and second electrode 200 forms electric field with the 3rd electrode 300.
As long as V1, V2 and V3 magnitude of voltage are different, electric field will be produced between three electrodes.When first electrode 100 is
When anode, second electrode 200 are negative electrode, negative voltage, shape between first electrode 100 and second electrode 200 are applied to the 3rd electrode
Into the first electric field, the second electric field is also form between the electrode 300 of first electrode 100 and the 3rd, is generally primarily upon the first electricity
Field and the second electric field.By the first electric field controls electronics and hole in the movement of laminated construction thickness direction, pass through the second electric field
Electronics and hole are controlled in the horizontal movement of laminated construction, so that the luminescent layer that electronics and hole are directed to needs converges.Example
(default) first luminescent layer 410 that electronics and hole are such as directed to needs converges, luminous so as to produce exciton excitation first
Layer 410 is luminous (such as blue light)；In another example electronics and hole are directed to the second luminescent layer 420 or the 3rd luminescent layer of needs
430 converge, and encourage the second luminescent layer 420 or the 3rd luminescent layer 430 to light (such as green glow or feux rouges) so as to produce exciton.Cause
This, it is multicolor luminous that above-mentioned driving method can drive above-mentioned Organic Light Emitting Diode to realize.
In order to reach the purpose accurately controlled electronics and hole, tertiary voltage V3 magnitude of voltage can be steady state value,
It can be variate.Such as it is changing value at least in setting duration that can set tertiary voltage V3 magnitude of voltage.Can be set
Three voltage V3 include multiple cycles, and tertiary voltage V3 magnitude of voltage is changed with identical rule in each cycle.
A kind of organic light emitting display using above-mentioned Organic Light Emitting Diode is also disclosed, the organic light emitting display bag
Multiple above-mentioned Organic Light Emitting Diodes are included, can apply to such as mobile phone, tablet personal computer, navigator, ATM etc. man-machine interaction
Among equipment.
It is appreciated that the diagram in Fig. 1~Fig. 2 is the simple examples to some primary structures of Organic Light Emitting Diode,
The entire infrastructure of Organic Light Emitting Diode is not represented.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of Organic Light Emitting Diode, it includes first electrode, sandwich construction and the second electrode of stacked on top setting, described
Sandwich construction comprises at least two-layer luminescent layer, and every layer of luminescent layer launches a kind of light of color, and the sandwich construction can be sent out
Penetrate the light of at least two colors, it is characterised in that：The Organic Light Emitting Diode also includes the 3rd electrode, the 3rd electrode position
In the side of first electrode and second electrode, the 3rd electrode in the length on stacked direction be more than or equal to first electrode,
The half of sandwich construction and second electrode superposition thickness, the 3rd electrode will at least be arranged at the light emitting layer thickness direction
Region；
The sandwich construction includes the first color luminescent layer of the first coloured light of transmitting, launches the second color luminescent layer and hair of the second coloured light
Penetrate the three-colour light-emitting layer of three coloured light；3rd electrode is at least provided with including the first color luminescent layer, described second
The region of color luminescent layer and the three-colour light-emitting layer thickness direction.
2. Organic Light Emitting Diode according to claim 1, it is characterised in that：
First color, the second color and the 3rd color are red, green and any combination of blueness.
3. Organic Light Emitting Diode according to claim 1, it is characterised in that：
High triplet energy level material layer is additionally provided between the luminescent layer.
4. Organic Light Emitting Diode according to claim 3, it is characterised in that：
The high triplet energy level material layer comprises at least UGH-2, m-CP, CDBP, TCTEB, CBF one of which material.
A kind of 5. driving method of Organic Light Emitting Diode, applied to the organic light emission according to any one of Claims 1 to 4
Diode, it is characterised in that：
First voltage is applied to the first electrode, second voltage is applied to the second electrode, the 3rd electrode is applied
Tertiary voltage, to cause the first electrode to form electric field, the first electrode and the second electrode with the second electrode
In at least one and the 3rd electrode form electric field；
The sandwich construction includes the first color luminescent layer of the first coloured light of transmitting, launches the second color luminescent layer and hair of the second coloured light
Penetrate the three-colour light-emitting layer of three coloured light；3rd electrode is at least provided with including the first color luminescent layer, described second
The region of color luminescent layer and the three-colour light-emitting layer thickness direction.
6. the driving method of Organic Light Emitting Diode according to claim 5, it is characterised in that：
One of them in the first electrode and the second electrode forms electric field with the 3rd electrode.
7. the driving method of Organic Light Emitting Diode according to claim 5, it is characterised in that：
The magnitude of voltage of the tertiary voltage is changing value at least in setting duration.
8. the driving method of Organic Light Emitting Diode according to claim 5, it is characterised in that：
At least one in the first electrode and the second electrode forms electric field with the 3rd electrode, with described in excitation
Default one layer of luminescent layer lights in sandwich construction.
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