CN107331782B - Organic light emitting display panel and organic light-emitting display device - Google Patents
Organic light emitting display panel and organic light-emitting display device Download PDFInfo
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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
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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
- H10K50/115—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising active inorganic nanostructures, e.g. luminescent quantum dots
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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
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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
- H10K50/13—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 comprising stacked EL layers within one EL unit
- H10K50/131—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 comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers
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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
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- Crystallography & Structural Chemistry (AREA)
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- Nanotechnology (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
This application discloses a kind of organic light emitting display panel and organic light-emitting display device, which includes：Underlay substrate；First electrode, the first transport layer, organic luminous layer, the second transport layer and the second electrode being set in turn on underlay substrate, wherein, organic luminous layer includes blue light-emitting layer and sky blue luminescent layer, wherein the wave-length coverage of blue light that blue light-emitting layer issues is：460nm-490nm, the wave-length coverage of sky blue coloured light that sky blue luminescent layer issues are：425nm-455nm；Coloration regulating course, wherein coloration regulating course is set to side of the second electrode far from underlay substrate, and coloration regulating course is used to adjust the light being emitted from second electrode.The application can be improved the light emission rate of organic light emitting display panel and the service life of organic luminous layer, improve the display effect of organic light emitting display panel by setting blue light-emitting layer and sky blue luminescent layer.
Description
Technical field
The present invention relates generally to field of display technology more particularly to a kind of organic light emitting display panel and organic light emission are aobvious
Showing device.
Background technique
In existing organic light emitting display panel technology, in order to obtain the white light being emitted from organic light emitting display panel, lead to
Often blue light-emitting layer, red light emitting layer and green light emitting layer is respectively set in the organic luminous layer in organic light emitting display panel
Three layers, while charge generating layers are set between every two-layer luminescent layer, by changing the luminous efficiency of three-colour light-emitting layer and bright
It spends ratio and forms white light.This adds increased the manufacturing process of organic light emitting display panel, and it is aobvious to reduce manufacture white-light organic light-emitting
Show the yields of panel.
Meanwhile blue light-emitting layer in the prior art causes blue light brightness to be remarkably decreased with the extension of use time,
In order to improve the stability of blue light brightness, it will usually increase the current density of blue pixel, so, can further decrease
The service life of machine light emitting display panel.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of organic light emitting display panel and organic light emission
Display device, to solve the technical problems existing in the prior art.
In a first aspect, the embodiment of the present application provides a kind of organic light emitting display panel, the organic light emitting display panel packet
It includes：Underlay substrate；Be set in turn in first electrode on underlay substrate, the first transport layer, organic luminous layer, the second transport layer with
And second electrode, wherein organic luminous layer includes blue light-emitting layer and sky blue luminescent layer, wherein what blue light-emitting layer issued
The wave-length coverage of blue light is：460nm-490nm, the wave-length coverage of sky blue coloured light that sky blue luminescent layer issues are：425nm-
455nm；Coloration regulating course, wherein coloration regulating course is set to side of the second electrode far from underlay substrate, and coloration regulating course is used
In the coloration for adjusting the light being emitted from second electrode.
In some embodiments, charge generating layers are additionally provided between sky blue luminescent layer and blue light-emitting layer.
In some embodiments, sky blue luminescent layer includes at least two materials, wherein forms the material of sky blue luminescent layer
Material is the combination of different types of fluorescent material or the combination of fluorescent material and phosphor material.
In some embodiments, blue light-emitting layer includes at least two materials, wherein the material for forming blue light-emitting layer is
The combination of different types of fluorescent material or the combination of fluorescent material and phosphor material.
In some embodiments, coloration regulating course includes yellow fluorescent material or gold-tinted quantum dot material, wherein yellow is glimmering
Luminescent material includes at least one：Organic yellow fluorescence material, inorganic yellow light fluorescent material.
In some embodiments, coloration regulating course includes at least two yellow fluorescent materials.
In some embodiments, coloration regulating course includes two kinds of yellow light fluorescent materials；One of yellow light fluorescent material is used
In absorption blue light；Wherein another yellow light fluorescent material is for absorbing sky blue coloured light.
In some embodiments, gold-tinted quantum dot material includes the different yellow light amount of size of at least two particle diameters
Son point material.
In some embodiments, coloration regulating course includes the different gold-tinted quantum dot material of size of two kinds of particle diameters
Material；One of gold-tinted quantum dot material is for absorbing blue light；Wherein another gold-tinted quantum dot material is sky blue for absorbing
Coloured light.
In some embodiments, coloration regulating course includes red fluorescence material and green fluorescent material.
In some embodiments, organic light emitting display panel further includes at least one layer of light-extraction layer, and wherein light-extraction layer is logical
The refractive index of light is overregulated, light extraction efficiency is improved.
In some embodiments, organic light emitting display panel includes one layer of light-extraction layer, and coloration regulating course is entrained in light and mentions
It takes in layer, wherein doping ratio of the coloration regulating course in light-extraction layer be：0.2%~20%.
In some embodiments, institute's organic light emitting display panel includes two layers of light-extraction layer, its in two layers of light-extraction layer
In one layer be set between coloration regulating course and second electrode, be in addition set on coloration regulating course far from underlay substrate for one layer
Side.
In some embodiments, first electrode is total reflection electrode, and second electrode is half reflection electrode, organic light emitting display
Panel is top emitting display panel；Wherein, first electrode includes transparent conductor material and the metal material with reflection characteristic；Shape
Material at second electrode is the metal material of conductive energy.
Second aspect, the embodiment of the present application provide a kind of organic light-emitting display device, which includes institute as above
The organic light emitting display panel stated.
According to scheme provided by the embodiments of the present application, blue is arranged by the organic luminous layer in organic light emitting display panel
Luminescent layer and sky blue luminescent layer, reduce process complexity while, can be improved organic luminous layer service life and
The conversion quantum efficiency of organic luminous layer, to improve the display precision of organic light emitting display panel.
Furthermore in some embodiments, by the way that coloration regulating course and light-extraction layer is arranged in organic light emitting display panel,
And coloration regulating course is entrained in light-extraction layer, so, the adjustable light being emitted from second electrode improves organic hair
The light emission rate of light display panel, while also reducing the thickness of organic light emitting display panel.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon：
Fig. 1 shows the structural schematic diagram of an organic light emitting display panel provided by the present application；
Fig. 2 shows the structural schematic diagrams of another organic light emitting display panel provided by the present application；
Fig. 3 a shows the schematic diagram of yellow photoluminescence spectrum provided by the present application；
Fig. 3 b shows the schematic diagram of sky blue electroluminescent spectrum provided by the present application；
Fig. 3 c shows the schematic diagram of blue coloured electroluminous spectrum provided by the present application；
Fig. 4 shows the structural schematic diagram of another organic light emitting display panel provided by the present application；
Fig. 5 shows the structural schematic diagram of another organic light emitting display panel provided by the present application；
Fig. 6 shows the structural schematic diagram of an organic light-emitting display device provided by the present application.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related application, rather than the restriction to this application.It also should be noted that in order to
Convenient for description, part relevant to the application is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to FIG. 1, it illustrates the structural schematic diagrams of an organic light emitting display panel provided by the present application.
Organic light emitting display panel 100 as shown in Figure 1 includes underlay substrate 11, and wherein underlay substrate 11 can be glass
Glass substrate, or other substrates, such as plastic base, quartz base plate etc. with the production of transmitance material, as long as reaching
To technique and requirement.
Organic light emitting display panel 100 further includes that the first electrode 12, first being set in turn on underlay substrate 11 is transmitted
Layer 13, organic luminous layer 14, the second transport layer 15 and second electrode 16.In the present embodiment, above-mentioned organic luminous layer 14 includes
Blue light-emitting layer 141 and sky blue luminescent layer 142, wherein the wave-length coverage of blue light that blue light-emitting layer issues is：
460nm-490nm, the wave-length coverage of sky blue coloured light that sky blue luminescent layer issues are：425nm-455nm.
In the present embodiment, above-mentioned first electrode 12 can be anode, or cathode.When above-mentioned first electrode 12 is
When anode, above-mentioned second electrode 16 is cathode.When above-mentioned first electrode 12 is cathode, above-mentioned second electrode 16 is anode.
Due to most of lowest unoccupied molecular orbital (Lowest Unoccupied for being used for electroluminescent organic material
Molecular Orbital, LUMO) energy level be 2.5eV~3.5eV, highest occupied molecular orbital (Highest Occupied
Molecular Orbital, HOMO) energy level be 5eV~6eV, therefore, in order to reduce the injection barrier of electrons and holes, cathode
(second electrode) needs the metal material using low work function, and anode (first electrode) then needs the material using high work function
Material.
The transparent conductive oxide that material as first electrode 12 may include and the metal material with reflectivity, one
As use transparent conductive oxide, for example, ITO (Indium Tin Oxide, tin indium oxide), IZO (Indium-doped
Zinc oxide, indium zinc oxide).In emission structure at top, since first electrode is as reflecting electrode, may also comprise tool
There is reflexive metal material, for example, silver-colored.It is led that is, first electrode can be by transparent conductive material and the first metal
The double-layer structure (for example, ITO/Ag) or multilayered structure (for example, ITO/Ag/ITO) of electric material composition.
Material as second electrode may include alkali metal, alkaline-earth metal or lanthanide series metal, for example, Ni, Au, Ag, Pt or
Cu.In addition, the high chemical activity (be easily oxidized or remove) in order to overcome the problems, such as part metals, can be used stable chemical performance
Metal alloy is (for example, Mg：Ag or Li：Al second electrode) is formed.
The addition of silver also improves second electrode in organic luminescence function other than improving the chemical stability of second electrode
Adhesion strength on layer.
In the present embodiment, above-mentioned first transport layer 13 can be hole transmission layer, or electron transfer layer.When upper
State first electrode 12 be anode when, above-mentioned first transport layer 13 be hole transmission layer, above-mentioned second transport layer 15 be electron-transport
Layer.When the first transport layer 13 is hole transmission layer, hole transporting properties can be used to compare electron transport property for the first transport layer 13
High material is, it is preferable to use hole mobility is greater than 1x 10-6cm2The material of/Vs.First transport layer 13 can be by a kind of or more
Kind organic material composition, the organic material for forming hole transmission layer can be aromatic diamines compound, aromatic triamine class
One or more of compound, carbazole compound, the stupid class compound furfuran compound of star three.
In the present embodiment, above-mentioned second transport layer 15 can be electron transfer layer, and electronics can be used to pass for the second transport layer 15
The defeated characteristic material higher than hole transporting properties is, it is preferable to use electron mobility is greater than 1x 10-6cm2The material of/Vs.The electronics
Organic material can be used in transport layer, the organic material can for metallic compound, nitrogen-containing heterocycle compound, organosilicon material or
Organic boron material etc..
In the present embodiment, organic light emitting display panel 100 further includes coloration regulating course 17, which is set to
Side of the second electrode 16 far from underlay substrate 11, the coloration regulating course can be used for adjusting the light being emitted from second electrode 16.Example
Such as, which can receive the light issued from organic luminous layer 14, be converted into the light of other colors and from coloration tune
It is projected in ganglionic layer 17, to adjust the coloration for the light being emitted from second electrode.
In the present embodiment, due to service life of the service life relative to blue light-emitting layer 141 of sky blue luminescent layer 142
It is longer, and the luminous efficiency of blue light-emitting layer 141 is higher relative to the luminous efficiency of sky blue luminescent layer 142.Therefore, this implementation
Example by the way that blue light-emitting layer 141 and sky blue luminescent layer 142 is arranged in organic luminous layer 14, using blue light-emitting layer 141 with
The mode that sky blue luminescent layer 142 combines generates blue light, can be improved organic light emitting display panel service life and
Luminous efficiency.In the organic light emitting display panel of some light for needing to issue other colors in addition to blue light, organic
Coloration regulating course is arranged in light emitting display panel 100, and blue light can be converted to light, such as white light, yellow light of other colors etc.,
To improve the display efficiency of organic light emitting display panel.
According to light direction, organic light emitting display panel can be divided into top emission type and bottom emitting type.In bottom emitting structure
Light is emitted from underlay substrate direction, and light is emitted from top device direction in emission structure at top.
In some optional implementations of the present embodiment, above-mentioned first electrode 12 can be to be totally reflected electrode, second
Electrode 16 can be half reflection electrode.By setting total reflection electrode for first electrode 12, half is set by second electrode 16
Reflecting electrode, can make the organic light emitting display panel 100 is top emitting organic light emitting display panel, the organic hair of top emission type
The TFT (Thin Film Transistor, thin film transistor (TFT)) for driving Organic Light Emitting Diode is made in organic hair by optical device
Below optical diode, divide light-emitting surface and TFT and open, and is not influenced by whether underlay substrate is transparent, so, Ke Yiti
The aperture opening ratio of high Organic Light Emitting Diode improves the display effect of organic light emitting display panel.
In some optional implementations of the present embodiment, above-mentioned blue light-emitting layer 141 may include at least two materials.
In these optional implementations, the material for forming blue light-emitting layer 141 can be for example different types of fluorescent material
Combination.
In organic light emitting display panel, when driving voltage is applied on cathode and anode, electrons and holes respectively from
Cathode and anode are injected into organic luminous layer and compound generation exciton, exciton transit to ground state from excitation state and shine.According to
Spin statistics are theoretical, and the singlet exciton of generation and the ratio of triplet excitons are 1：3.
For fluorescent material, 75% triplet excitons cannot shine because of radiationless transition, shine mainly by
25% singlet exciton transition luminescence is equivalent to 75% energy and is not used to shine.
For the disadvantage for overcoming fluorescent material luminous efficiency lower, the energy of triplet state is made full use of, is had been developed for
Singlet exciton and triplet excitons are involved in luminous phosphor material.Although however, the luminous efficiency of phosphor material relative to
The luminous efficiency of fluorescent material is higher, but its service life is shorter relative to the service life of fluorescent material.
As a result, in these optional implementations, the material of blue light-emitting layer 141 may be fluorescent material and phosphorescence
The combination of material.By the way that phosphor material to be doped in fluorescent material, the same of the luminous efficiency of blue light-emitting layer can improved
When, extend the service life of blue light-emitting layer.
Similarly, in some optional implementations of the present embodiment, above-mentioned sky blue luminescent layer 142 may include at least
Two kinds of materials, the material for forming sky blue luminescent layer 142 can be the combination of different types of fluorescent material.It is sky blue in order to enhance
The service life of color luminescent layer 142, the material of sky blue luminescent layer 142 may be the combination of fluorescent material and phosphor material.
With continued reference to FIG. 2, it illustrates the structural representations of another organic light emitting display panel 200 provided by the present application
Figure.
Organic light emitting display panel 200 as shown in Figure 2 includes underlay substrate 21, is set in turn on underlay substrate 21
First electrode 22, the first transport layer 23, organic luminous layer 24, the second transport layer 25, second electrode 26 and coloration regulating course 27.
Unlike organic light emitting display panel 200 shown in FIG. 1, in the present embodiment, above-mentioned organic luminous layer 24 is wrapped
Include blue light-emitting layer 241, sky blue luminescent layer 242 and between blue light-emitting layer 241 and sky blue luminescent layer 242
Charge generating layers 243.The charge generating layers 243 can for to hole transport ability material be added with as electron acceptor by
The structure of body substance, or there is the knot that the donor substance as electron donor is added with to electron transporting material
Above two structure can also be laminated in structure.When charge generating layers 243 include the composite material of organic compound and Receptor substance
When, as the composite material in use, can be used for the first transport layer 23 shown in Fig. 2, the first transport layer 23 is hole at this time
Implanted layer.As organic compound, it is (oligomeric that aromatic amine compound, carbazole compound, aromatic hydrocarbons, high-molecular compound can be used
Object, dendritic, polymer etc.) etc. various compounds.Charge generating layers 243 are also possible to combination and include organic compound
With the laminated construction of the layer and the layer being made of other materials of the composite material of Receptor substance.
In the present embodiment, whiten in order to obtain the organic light emitting display panel of coloured light, above-mentioned coloration regulating course 27 can be with
Including yellow fluorescent material or gold-tinted quantum dot material.Wherein, above-mentioned yellow light fluorescent material comprises at least one of the following：Organic yellow
Fluorescence material, inorganic yellow light fluorescent material.
In the present embodiment, above-mentioned inorganic yellow light fluorescent material may include europium oxide, cadmium sulfide, yttrium-aluminium-garnet, oxidation
The mixing of barium and other metal oxides.Above-mentioned organic yellow fluorescence material may include that launch wavelength is 550nm~615nm
Luminescence generated by light yellow light organic material.
In some optional implementations of the present embodiment, above-mentioned coloration regulating course 27 may include a kind of yellow light phosphor
Material, the wave-length coverage of the absorption spectrum of the material cover the wavelength of the blue light that above-mentioned blue light-emitting layer 241 issues and sky blue
The wavelength for the sky blue coloured light that color luminescent layer 242 issues so absorbs blue light and sky blue according to yellow fluorescent material
The ratio of light, yellow fluorescent material will be absorbed into what the blue light that blue light-emitting layer 241 issues was issued with sky blue luminescent layer 242
Sky blue coloured light is converted to yellow light, the sodium yellow and in conjunction with blue light, sky blue coloured light, issues white light.
In some optional implementations of the present embodiment, above-mentioned coloration regulating course 27 may include that at least two yellow lights are glimmering
Luminescent material, it can be inorganic yellow light fluorescence that at least yellow light fluorescent material, which can be the combination of above-mentioned organic yellow fluorescence material, for this
The combination of material, or the combination of organic yellow fluorescence material and inorganic yellow light fluorescent material.
In some optional implementations of the present embodiment, above-mentioned coloration regulating course 27 may include that at least two yellow lights are glimmering
Luminescent material, two kinds of yellow light fluorescent materials can be inorganic yellow light fluorescent material, can be organic yellow fluorescence material,
Or the combination of inorganic yellow light fluorescent material and organic yellow fluorescence material.Wherein, on a kind of yellow light fluorescent material absorbs
The blue light of the sending of blue light-emitting layer 241 is stated, another yellow light fluorescent material absorbs the sky blue of the sending of sky blue luminescent layer 242
Light.In this way, yellow fluorescent material will be absorbed into what the blue light that blue light-emitting layer 241 issues was issued with sky blue luminescent layer 242
Sky blue coloured light is converted to yellow light.As shown in Figure 3a, it illustrates the schematic diagram of yellow photoluminescence spectrum, luminescence generated by light (PL),
Refer to substance under the excitation of light, electronics transits to conduction band from valence band, and electrons and holes reach respective by relaxation and are not occupied
Lowest excited state (being conduction band bottom and top of valence band, the HOMO lumo energy of organic matter in intrinsic semiconductor), becomes quasi-equilibrium
State；Electrons and holes under quasi-equilibrium state pass through recombination luminescence again, form the intensity of different wavelengths of light or the spectrum of Energy distribution
Figure.Yellow photoluminescence spectrum as shown in Figure 3a is the blue light that yellow fluorescent powder is issued by absorbing blue light-emitting layer 241
And the day blue light that sky blue luminescent layer 242 issues, to be converted into the spectrogram after yellow light.
The formation of above-mentioned blue light and sky blue coloured light is formed by electroluminescent.Fig. 3 b shows sky blue electroluminescent light
The schematic diagram of spectrum, Fig. 3 c show the schematic diagram of blue coloured electroluminous spectrum.Electroluminescent, the voltage by being added in two electrodes produce
Raw electric field, the electronics excited by electric field hit the centre of luminescence, and be led to electronics in transition between energy level, variation, compound cause to send out
A kind of physical phenomenon of light.
In the present embodiment, since above-mentioned yellow light fluorescent material is embedded photoluminescent material, material has specific absorbing wavelength
And launch wavelength.When the absorbing wavelength of above-mentioned yellow light material is not covered with the emission wavelength of blue light, yellow light fluorescent material is not
It can shine；When above-mentioned yellow light material absorbing wavelength cover above-mentioned blue light and/or sky blue coloured light emission wavelength range it is narrow,
When above-mentioned blue light and/or sky blue light not being completely covered, then the luminous efficiency of yellow fluorescent material is lower；It is only above-mentioned
The emission wavelength of above-mentioned blue light and/or sky blue coloured light, and yellow can be completely covered in the absorbing wavelength of yellow light fluorescent material
The glow peak of the luminous spectrum of the absorption peak and blue light and/or sky blue coloured light of the absorption spectra of fluorescent material is in Same Wavelength position
When, the sodium yellow that yellow fluorescent material issues is more efficient.By the way that two kinds of yellow fluorescent materials are arranged in coloration regulating course 27
The blue light that blue light-emitting layer 241 issues and the day blue light that sky blue luminescent layer 242 issues are absorbed respectively, so that yellow light is glimmering
Luminescent material is converted to sodium yellow, by adjusting yellow light fluorescent material to the assimilation ratio of blue light and/or sky blue coloured light, and should
Sodium yellow forms white light after being mixed with the blue light and/or sky blue coloured light not fully absorbed, can be improved to blue light
And the absorption efficiency of sky blue coloured light, so that being more clear from the white light that organic light emitting display panel 200 is launched.
In the present embodiment, above-mentioned coloration regulating course 27 can also be gold-tinted quantum dot material, the gold-tinted quantum dot material packet
Include the different gold-tinted quantum dot material of size of at least two particle diameters.The gold-tinted quantum dot material can be for example vulcanization
Cadmium quanta point material, wherein the particle diameter for absorbing the cadmiumsulfide quantum dot of blue light can be 1nm~1.5nm, absorb sky blue
The particle diameter of the cadmiumsulfide quantum dot of coloured light can be 1.5nm~2nm.
In some optional implementations of the present embodiment, above-mentioned gold-tinted quantum dot material may include two kinds of particle diameters
The different gold-tinted quantum dot material of size, one of gold-tinted quantum dot material absorbs the indigo plant that blue light-emitting layer 241 issues
Coloured light；Wherein another gold-tinted quantum dot material absorbs the sky blue coloured light that sky blue luminescent layer 241 issues.Due to quanta point material
Quantum size effect, i.e., by control quantum dot shape, structure and size, the energy gap width of adjustable quantum dot.With
Quantum dot partial size it is smaller, light absorpting ability is stronger, shows the strong absorption spectra of broadband.Due to blue light and sky blue coloured light
Luminous peak position can effectively be inhaled in different positions, therefore using the different gold-tinted quantum dot material of the size of particle diameter
Blue light and sky blue coloured light are received, to show yellow light.
In some optional implementations of the present embodiment, above-mentioned coloration regulating course 27 can also include red fluorescence material
Material and green fluorescent material, the red fluorescence material and green fluorescent material absorb the indigo plant that above-mentioned blue light-emitting layer 241 issues
The sky blue coloured light that coloured light and sky blue luminescent layer 242 issue, is presented red light and green light respectively, the red light and green light with
The blue light not fully absorbed and sky blue coloured light combine, to make the emergent light white light of organic light emitting display panel 200.
With continued reference to FIG. 4, it illustrates the structural schematic diagrams of another organic light emitting display panel provided by the present application.
As shown in figure 4, organic light emitting display panel 400 includes underlay substrate 41, is set in turn on underlay substrate 41
First electrode 42, the first transport layer 43, organic luminous layer 44, the second transport layer 45, second electrode 46.
Unlike Fig. 1, embodiment shown in Fig. 2, in the present embodiment, organic light emitting display panel 400 further includes light
Extract layer 47, the extraction efficiency which can improve light by adjusting the refractive index of light.Those skilled in the art
It is understood that the position of above-mentioned light-extraction layer 47 is set to side of the second electrode 46 far from underlay substrate.
When exciton transition shines, light is projected to all directions, in communication process, due to the effect of total reflection, shape
At external schema (light is projected from top device) and waveguide mode, (light is limited in organic film material, ito thin film and substrate
In substrate).In existing organic luminescent device, light respectively may be about 20% and 80% in the ratio of external schema and waveguide mode,
It is projected that is, the light that organic luminescent device issues only has about 20% from device, and most of light can not be penetrated from top device
Out, this luminous efficiency for greatly reducing organic luminescent device.After light-extraction layer 47 is set on second electrode 46, it can reduce
Total reflection loss.
Organic light emitting display panel 400 as shown in Figure 4 includes one layer of light-extraction layer 47, organic light emitting display panel 400
Coloration regulating course be entrained in light-extraction layer 47.The doping ratio of the coloration regulating course in light-extraction layer 47 can be
0.2%~20%.In general, light-extraction layer 47 can be greater than 1.5 material using refractive index n, which can be organic material,
The wavelength of the material is 480nm~800nm.Coloration regulating course can be by way of hot evaporation, silk-screen printing or inkjet printing
It is doped with light-extraction layer 47.
When the refractive index of light-extraction layer 47 is greater than 1.5, it is possible to reduce the Fresnel loss and total reflection loss of light, thus
Further improve light extraction efficiency, makes organic luminescent device luminous efficiency with higher.
With continued reference to FIG. 5, it illustrates the structural schematic diagrams of another organic light emitting display panel provided by the present application.
As shown in figure 5, organic light emitting display panel 500 includes underlay substrate 51, is set in turn on underlay substrate 51
First electrode 52, the first transport layer 53, organic luminous layer 54, the second transport layer 55, second electrode 56.
Unlike embodiment shown in Fig. 4, in the present embodiment, organic light emitting display panel 500 includes that two layers of light mentions
Layer is taken, i.e. from layer 57 and the second light-extraction layer 58, organic light emitting display panel 500 further includes being located at the first light for the first light extraction
Coloration regulating course 59 between extract layer 57 and the second light-extraction layer 58.
Wherein, the material for forming the first light-extraction layer 57 and the material for forming the second light-extraction layer 58 can be identical, can also
With difference, as long as refractive index n is greater than 1.5, wave-length coverage is between 380nm~800nm.
In the present embodiment, the thickness of above-mentioned first light-extraction layer 57 can be between 20nm~30nm, above-mentioned second light
The thickness of extract layer 58 can between 20nm~30nm, the thickness of above-mentioned coloration regulating course 59 can 0.5nm~15nm it
Between.
Herein it is noted that although Fig. 4, Fig. 5 respectively illustrate one layer of light-extraction layer and two layers of light-extraction layer
The case where, but the application can also include multilayer light-extraction layer, select according to application scenarios, not limit herein
It is fixed.
In addition, organic light emitting display panel 500 may also include electron injecting layer and hole injection layer.Electron injecting layer can be set
It sets between cathode and electron transfer layer, for reducing the electron injection barrier of cathode to electron transfer layer；Hole injection layer can
It is arranged between anode and hole transmission layer, for reducing the hole injection barrier of anode to hole transmission layer.
Electron injecting layer can doped p type material.Hole injection layer can adulterate n-type material.
The present embodiment proposes a kind of organic light-emitting display device, as shown in Figure 6.Organic light emission of the present embodiment is aobvious
Showing device 600 can be used for such as smart phone, tablet terminal, mobile telephone, the personal computer of notebook type, game
The various devices such as equipment.Specifically, the organic light-emitting display device 600 includes the display surface mentioned in aforementioned any embodiment
Plate.
It will be appreciated by those skilled in the art that technical proposal scope involved in the application, however it is not limited to above-mentioned technology
Technical solution made of the specific combination of feature, while should also cover in the case where not departing from technical solution design, by
Above-mentioned technical characteristic or its equivalent feature carry out any combination and other technical solutions for being formed.Such as features described above and the application
Disclosed in (but be not limited to) replaced mutually with the technical characteristic of similar functions and the technical solution that is formed.
Claims (12)
1. a kind of organic light emitting display panel, which is characterized in that the organic light emitting display panel includes：
Underlay substrate；
First electrode, the first transport layer, organic luminous layer, the second transport layer and being set in turn on the underlay substrate
Two electrodes, wherein the organic luminous layer includes blue light-emitting layer and sky blue luminescent layer, wherein the blue light-emitting layer hair
The wave-length coverage of blue light out is：460nm-490nm, the wave-length coverage for the sky blue coloured light that the sky blue luminescent layer issues
For：425nm-455nm；
Coloration regulating course, wherein the coloration regulating course is set to side of the second electrode far from the underlay substrate, institute
Coloration regulating course is stated for adjusting the coloration for the light being emitted from the second electrode；
At least one layer of light-extraction layer, wherein refractive index of the light-extraction layer by adjusting light, improves light extraction efficiency；
When the organic light emitting display panel includes one layer of light-extraction layer, the coloration regulating course is entrained in the light-extraction layer
In, wherein doping ratio of the coloration regulating course in the light-extraction layer be：0.2%~20%；
Or the organic light emitting display panel is when including two layers of light-extraction layer, wherein one layer of setting in two layers of light-extraction layer
Between the coloration regulating course and the second electrode, in addition it is set on the coloration regulating course far from the lining for one layer
The side of substrate.
2. organic light emitting display panel according to claim 1, which is characterized in that the sky blue luminescent layer and the indigo plant
Charge generating layers are additionally provided between color luminescent layer.
3. organic light emitting display panel according to claim 1, which is characterized in that the sky blue luminescent layer includes at least
Two kinds of materials, wherein the material for forming the sky blue luminescent layer is combination or the fluorescent material of different types of fluorescent material
With the combination of phosphor material.
4. organic light emitting display panel according to claim 1, which is characterized in that the blue light-emitting layer includes at least two
Kind material, wherein form the material of the blue light-emitting layer as the combination of different types of fluorescent material or fluorescent material and phosphorus
The combination of luminescent material.
5. organic light emitting display panel according to claim 1, which is characterized in that the coloration regulating course includes that yellow is glimmering
Luminescent material or gold-tinted quantum dot material, wherein the yellow fluorescent material includes that organic yellow fluorescent material and inorganic yellow are glimmering
At least one of luminescent material.
6. organic light emitting display panel according to claim 5, which is characterized in that the coloration regulating course includes at least two
Kind yellow fluorescent material.
7. organic light emitting display panel according to claim 6, which is characterized in that the coloration regulating course includes two kinds of Huangs
Fluorescence material；
One of yellow light fluorescent material is for absorbing the blue light；Wherein another yellow light fluorescent material is used for
Absorb the sky blue coloured light.
8. organic light emitting display panel according to claim 5, which is characterized in that the gold-tinted quantum dot material includes extremely
The different gold-tinted quantum dot material of size of few two kinds of particle diameters.
9. organic light emitting display panel according to claim 8, which is characterized in that the coloration regulating course includes two kinds of grains
The different gold-tinted quantum dot material of the size of sub- diameter；
One of gold-tinted quantum dot material is for absorbing the blue light；The wherein another gold-tinted quantum dot material
For absorbing the sky blue coloured light.
10. organic light emitting display panel according to claim 1, which is characterized in that the coloration regulating course includes red
Fluorescent material and green fluorescent material.
11. organic light emitting display panel according to claim 1, which is characterized in that the first electrode is the radio that is all-trans
Pole, the second electrode are half reflection electrode, and the organic light emitting display panel is top emitting display panel；Wherein, described
One electrode includes transparent conductor material and the metal material with reflection characteristic；
The material for forming the second electrode is the metal material of conductive energy.
12. a kind of organic light-emitting display device, which is characterized in that the organic light-emitting display device includes claim 1- right
It is required that organic light emitting display panel described in one of 11.
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| WO2020063571A1 (en) * | 2018-09-25 | 2020-04-02 | Tcl集团股份有限公司 | Quantum dot white light diode |
| CN110943172B (en) * | 2018-09-25 | 2021-05-18 | Tcl科技集团股份有限公司 | Quantum dot white light diode |
| CN112310186A (en) * | 2020-10-30 | 2021-02-02 | 京东方科技集团股份有限公司 | Light emitting device, display panel and display apparatus |
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Effective date of registration: 20211020 Address after: No.8, liufangyuanheng Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430074 Patentee after: WUHAN TIANMA MICROELECTRONICS Co.,Ltd. Address before: Room 509, building 1, No. 6111, Longdong Avenue, Pudong New Area, Shanghai, 201201 Patentee before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |