CN109300949A - A kind of organic light emitting display panel and organic light-emitting display device - Google Patents
A kind of organic light emitting display panel and organic light-emitting display device Download PDFInfo
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- CN109300949A CN109300949A CN201811150163.2A CN201811150163A CN109300949A CN 109300949 A CN109300949 A CN 109300949A CN 201811150163 A CN201811150163 A CN 201811150163A CN 109300949 A CN109300949 A CN 109300949A
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
Abstract
The invention discloses a kind of organic light emitting display panel and organic light-emitting display devices, organic light emitting display panel includes blue pixel area, the material for constituting light emitting functional layer in blue pixel area includes setpoint color light material of main part and up-conversion, and the wavelength of setpoint color light is greater than blue light wavelength；Up-conversion is used to absorb the energy of setpoint color light material of main part release and emits blue light.According to the technical solution of the present invention, by the advantage of setpoint color light material of main part level-density parameter the composite denseness of carrier in light emitting functional layer is improved, the low problem of the blue light luminous efficiency of blue pixel area caused by Blue-light emitting host material is improved, the blue light luminous efficiency of organic light emitting display panel blue pixel area is improved.In addition, improving the problem of carrier caused by Blue-light emitting host material accumulates in the interface of light emitting functional layer, damages light-emitting function bed boundary and then influence the organic light emitting display panel service life using setpoint color light material of main part.
Description
Technical field
The present embodiments relate 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
OLED, i.e. Organic Light Emitting Diode (Organic Light-Emitting Diode), also known as organic electroluminescence hair
Optical device, OLED have gradually been occupied in small size display field due to the advantages that frivolous, bent, high contrast, wide colour gamut
One seat.Its basic structure includes anode, cathode and the light emitting functional layer of corresponding each pixel region, when voltage is applied to
When on anode and cathode, hole and electronics are moved to light emitting functional layer, and the two is compound in light emitting functional layer, in light emitting functional layer
Exciton ground state moved to by excitation state shine.
AMOLED (Active-matrix Organic Light-Emitting Diode, active matrix organic light-emitting two
Pole pipe) blue pixel area Blue-light emitting host material greater band gap, cause the blue light luminous efficiency of blue pixel area compared with
It is low, influence the service life of organic light emitting display panel.
Summary of the invention
The present invention provides a kind of organic light emitting display panel and organic light-emitting display device, by setpoint color light main body material
The advantage of material level-density parameter improves the composite denseness of carrier in light emitting functional layer, improves caused by Blue-light emitting host material
The low problem of the blue light luminous efficiency of blue pixel area improves the blue light hair of organic light emitting display panel blue pixel area
Light efficiency.In addition, improving carrier caused by Blue-light emitting host material in light emitting functional layer using setpoint color light material of main part
Interface accumulation, damage light-emitting function bed boundary so that influence the organic light emitting display panel service life the problem of.
In a first aspect, the embodiment of the invention provides a kind of organic light emitting display panels, comprising:
Blue pixel area, the material for constituting light emitting functional layer in the blue pixel area includes setpoint color light main body
The wavelength of material and up-conversion, setpoint color light is greater than blue light wavelength；
The up-conversion is used to absorb the energy of the setpoint color light material of main part release and emits blue light.
Further, the setpoint color light material of main part is feux rouges material of main part or green light material of main part.
Further, the setpoint color light material of main part and the up-conversion form doped structure.
Further, the amount of the substance of setpoint color light material of main part described in the doped structure and the upper conversion material
The ratio between amount of substance of material is more than or equal to 1:1, is less than or equal to 1:0.01.
Further, the absorption spectrum of the emission spectrum and the up-conversion of the setpoint color light material of main part is deposited
Overlapping.
Further, the absorption spectrum of the emission spectrum and up-conversion of the setpoint color light material of main part
The corresponding wavelength of overlapping part is more than or equal to 500nm, is less than or equal to 1000nm.
Further, the corresponding wavelength of wave crest of the emission spectrum of the setpoint color light material of main part is equal to described upper turn
The corresponding wavelength of the wave crest of the absorption spectrum of conversion materials.
Further, the up-conversion includes metal organic chelate.
Further, the organic light emitting display panel includes substrate, and the blue pixel area includes along far from described
First electrode, the first auxiliary light emission layer, light emitting functional layer, the second auxiliary light emission layer and the second electrode of orientation substrate setting,
Micro-cavity structure is formed between the first electrode and the second electrode；
The direction of plane where perpendicular to the substrate, the distance between the first electrode and the second electrode are
The chamber of the micro-cavity structure is long, and the chamber of the micro-cavity structure is long to be more than or equal to 170nm, is less than or equal to 230nm.
Second aspect, the embodiment of the invention also provides a kind of organic light-emitting display devices, including described in first aspect
Organic light emitting display panel.
The embodiment of the invention provides a kind of organic light emitting display panel and organic light-emitting display device, organic light emitting displays
Panel includes blue pixel area, and the material for constituting light emitting functional layer in blue pixel area includes setpoint color light material of main part
And up-conversion, the wavelength of setpoint color light are greater than blue light wavelength, up-conversion can absorb setpoint color light main body
The energy of material release simultaneously emits blue light, and the blue light luminous efficiency for improving blue pixel area caused by Blue-light emitting host material is low
The problem of, the blue light luminous efficiency of organic light emitting display panel blue pixel area is improved, Blue-light emitting host material is improved and leads
The light emitting functional layer interface damage of cause influences the problem of organic light emitting display panel service life in turn.
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 is a kind of structural schematic diagram of organic light emitting display panel provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of organic light-emitting display device provided in an embodiment of the present invention.
Specific embodiment
The present invention 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 the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.It is same or similar in this specification
Drawing reference numeral represent the same or similar structure, element or process.It should be noted that in the absence of conflict, this Shen
Please in embodiment and embodiment in feature can be combined with each other.
The embodiment of the invention provides a kind of organic light emitting display panel, organic light emitting display panel includes blue pixel area
Domain, the material for constituting light emitting functional layer in blue pixel area includes setpoint color light material of main part and up-conversion, if
The wavelength for determining color of light is greater than blue light wavelength, and the energy that up-conversion is used to absorb the release of setpoint color light material of main part is concurrent
Penetrate blue light.
The greater band gap of the Blue-light emitting host material of the blue pixel area of AMOLED causes the blue light of blue pixel area to be sent out
Light efficiency is lower, influences the service life of organic light emitting display panel.
Organic light emitting display panel provided in an embodiment of the present invention includes blue pixel area, is constituted in blue pixel area
The material of light emitting functional layer includes setpoint color light material of main part and up-conversion, and the wavelength of setpoint color light is greater than blue light
Wavelength, up-conversion can absorb the energy of setpoint color light material of main part release and emit blue light.Due to setpoint color light
Wavelength be greater than blue light wavelength, by the advantage of setpoint color light material of main part level-density parameter make carrier relative to setting face
The injection barrier of coloured light material of main part is less than injection barrier of the carrier relative to Blue-light emitting host material, setpoint color light main body material
The setting of material improves blue pixel caused by Blue-light emitting host material so that the composite denseness of carrier improves in light emitting functional layer
The low problem of the blue light luminous efficiency in region, improves the blue light luminous efficiency of organic light emitting display panel blue pixel area.
In addition, improving carrier caused by the Blue-light emitting host material of broad-band gap in light emitting functional layer using setpoint color light material of main part
Interface accumulation, damage light-emitting function bed boundary so that influence the organic light emitting display panel service life the problem of.
It is core of the invention thought above, following will be combined with the drawings in the embodiments of the present invention, to the embodiment of the present invention
In technical solution be clearly and completely described.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Under the premise of making creative work, every other embodiment obtained be shall fall within the protection scope of the present invention.
Fig. 1 is a kind of structural schematic diagram of organic light emitting display panel provided in an embodiment of the present invention.As shown in Figure 1, having
Machine light emitting display panel includes blue pixel area B, and the material for constituting light emitting functional layer 1 in blue pixel area B includes setting
Color of light material of main part 11 and up-conversion 12, the wavelength of setpoint color light are greater than blue light wavelength, and up-conversion 12 is used
In the energy for absorbing the release of setpoint color light material of main part 11 and emit blue light.
As shown in Figure 1, organic light emitting display panel includes substrate 20, blue pixel area B includes along far from 20 side of substrate
To the first electrode 21 of setting, the first auxiliary light emission layer 22, light emitting functional layer 1, the second auxiliary light emission layer 23 and second electrode
24, illustratively, it can be set that first electrode 21 is anode, second electrode 24 is cathode, the first auxiliary light emission layer 22 is hole
The auxiliary light emission functional layer 1 of type, can have multilayered structure, such as may include hole injection layer 221, hole transmission layer 222
And electronic barrier layer 223.Second auxiliary light emission layer 23 is the auxiliary light emission functional layer 1 of electron type, also can have multilayer knot
Structure may include electron injecting layer 231, electron transfer layer 232 and hole blocking layer 233.
Illustratively, first electrode film layer and second electrode film layer can be formed by the method for sputtering or being deposited, it is right
First electrode film layer is patterned the first electrode 21 that technique forms different pixels region, is patterned work to second electrode film layer
Skill forms the second electrode 24 in different pixels region, can be formed by chemical vapor deposition the first auxiliary light emission layer 22, second
Auxiliary light emission layer 23 and light emitting functional layer 1.
Specifically, hole passes through the first auxiliary light emission when voltage is applied to first electrode 21 and second electrode 24
Layer 22 is moved to light emitting functional layer 1, and electronics is moved to light emitting functional layer 1 by the second auxiliary light emission layer 23, and the two is in luminous function
Compound in ergosphere 1, the exciton in 1 material of light emitting functional layer moves to ground state by excitation state and shines.
Illustratively, setpoint color light can be feux rouges or green light, i.e. setpoint color light material of main part 11 can be feux rouges
Material of main part or green light material of main part.The band gap of feux rouges material of main part and the band gap of green light material of main part are respectively less than blue light main body
The band gap of material so that carrier relative to feux rouges material of main part injection barrier and carrier relative to green light material of main part
Injection barrier be respectively less than injection barrier of the carrier relative to Blue-light emitting host material, the setting of setpoint color light material of main part 11
So that the composite denseness of carrier improves in light emitting functional layer 1, setpoint color light material of main part 11 is improved by Carrier recombination
The energy of generation.
It should be noted that here only to set the color of light as feux rouges or green light, i.e. setpoint color light material of main part 11
To be illustrated for red light material or green light material, not to the restriction of setpoint color light, can select to set according to specific requirements
Determine color of light material of main part 11, it is ensured that the wavelength of setpoint color light, which is greater than blue light wavelength, can be improved current-carrying in light emitting functional layer 1
The composite denseness of son.
Optionally, setpoint color light material of main part 11 can be set and up-conversion 12 forms doped structure.Specifically,
Setpoint color light material of main part 11 can form doped structure using evaporation process is blended with up-conversion 12, that is, form hair
When light functional layer 1, while setpoint color light material of main part 11 and up-conversion 12 is deposited, setpoint color light material of main part 11 with
Up-conversion 12 forms doped structure and is conducive to energy transfer of the setpoint color light material of main part 11 to up-conversion 12, schemes
Setting energy transfer direction of the light color luminescent material 11 to up-conversion 12 is schematically shown with arrow in 1.
In organic light emitting display panel there is level-density parameter in the light emitting functional layer of blue pixel area, i.e., due to blue
The greater band gap of Blue-light emitting host material in pixel region light emitting functional layer leads to the LUMO of blue pixel area light emitting functional layer
Energy level is more much lower than the lumo energy of electron transfer layer, and HOMO energy level is more much higher than the HOMO energy level of hole transmission layer, increases
Injection barrier of the carrier relative to Blue-light emitting host material, it is close that organic light emitting display panel can not obtain higher Carrier recombination
Degree, causes the blue light luminous efficiency of blue pixel area low.In addition, the broad-band gap of Blue-light emitting host material make carrier relative to
The injection barrier of Blue-light emitting host material increases, and also increases the difficulty that carrier enters Blue-light emitting host material, leads to carrier
It is accumulated in the interface of light emitting functional layer, damage is generated to the interface of light emitting functional layer in organic light emitting display panel, influences to have
The service life of machine light emitting display panel.
Experiments verify that the corresponding blue light luminous efficiency of fluorescence one-component luminescence system generallyd use at present is 5Cd/A,
The corresponding blue light luminous efficiency of fluorescence Subjective and Objective luminescence system is 8Cd/A, and setting of the embodiment of the present invention constitutes the blue pixel
The material of light emitting functional layer includes setpoint color light material of main part and up-conversion in region, and the wavelength of setpoint color light is big
In blue light wavelength, up-conversion can absorb the energy of setpoint color light material of main part release and emit blue light, so that blue
The blue light luminous efficiency of pixel region can reach 10Cd/A or more, improve the indigo plant of blue pixel area compared with the existing technology
Light luminous efficiency, and experiments verify that, setpoint color light material of main part and up-conversion used by the embodiment of the present invention
The light emitting functional layer of composition make blue light brightness decay to 95% corresponding blue light service life by original 200h promoted to
400h reduces the rate of decay of blue light brightness.
Illustratively, it includes metal organic chelate that up-conversion 12, which can be set,.Specifically, metal organic chelate
The up-conversion 12 of composition can absorb setpoint color light material of main part 11, such as feux rouges material of main part or green light material of main part
The energy of release simultaneously emits blue light.In this way, the luminescent layer in the blue pixel area for ensuring organic light emitting display panel can be sent out
Out while blue light, since the wavelength of setpoint color light is greater than blue light wavelength, the band gap of setpoint color light material of main part is less than indigo plant
The band gap of light material of main part reduces the lumo energy of blue pixel area light emitting functional layer and the lumo energy of electron transfer layer
Between difference and blue pixel area light emitting functional layer HOMO energy level and hole transmission layer HOMO energy level between difference
Value, i.e., make carrier relative to setpoint color light material of main part using the advantage of setpoint color light material of main part level-density parameter
Injection barrier is less than injection barrier of the carrier relative to Blue-light emitting host material, improves the compound of carrier in light emitting functional layer
Density improves, and improves the low problem of the blue light luminous efficiency of blue pixel area caused by Blue-light emitting host material, has improved
The blue light luminous efficiency of machine light emitting display panel blue pixel area.In addition, making current-carrying using setpoint color light material of main part
Son is less than injection barrier of the carrier relative to Blue-light emitting host material, drop relative to the injection barrier of setpoint color light material of main part
Low carrier enters the difficulty of Blue-light emitting host material, improves carrier caused by Blue-light emitting host material in light emitting functional layer
The problem of interface accumulation, damage light-emitting function bed boundary and then influence organic light emitting display panel service life.
Illustratively, metal organic chelate can be metalloporphyrin chelate, and metalloporphyrin chelate for example can be
Octaethylporphyrin Pt (II), structural formula is as follows:
Metalloporphyrin chelate for example can be octaethylporphyrin Pd (II), and structural formula is as follows:
Optionally, the emission spectrum of setpoint color light material of main part 11 and the absorption spectrum of up-conversion 12 can be set
In the presence of overlapping.Specifically, the luminescent spectrum of setpoint color light material of main part 11 is carrier in setpoint color light material of main part 11
In it is compound, exciton in setpoint color light material of main part 11 moves to the luminous corresponding spectrum of process of ground state by excitation state, on
The corresponding spectrum of the light that the absorption spectrum of transition material 12 can absorb.The emission spectrum pair of setpoint color light material of main part 11
The wave-length coverage for the light for answering setpoint color light material of main part 11 that can emit, the absorption spectrum of up-conversion 12, which corresponds to, to be turned
The emission spectrum and upper conversion material of setpoint color light material of main part 11 is arranged in the wave-length coverage for the light that conversion materials 12 can absorb
The absorption spectrum of material 12, which exists, to be overlapped, i.e., the corresponding wave-length coverage of both settings exists overlapping, such as setpoint color can be set
The corresponding wavelength of the overlapping part of absorption spectrum of emission spectrum and up-conversion of light material of main part is more than or equal to 500nm,
Less than or equal to 1000nm, can be avoided converting material in this way can not absorb the energy of setpoint color light material of main part release, really
The energy of the release of setpoint color light material of main part 11 can effectively be absorbed and emit blue light by protecting up-conversion 12, by setting
The advantage of color of light material of main part level-density parameter improves the blue light luminous efficiency of organic light emitting display panel blue pixel area, changes
Carrier caused by kind Blue-light emitting host material is accumulated in the interface of light emitting functional layer, damage light-emitting function bed boundary and then influence
The problem of organic light emitting display panel service life.
Optionally, the corresponding wavelength of wave crest that the emission spectrum of setpoint color light material of main part can be set is equal to upper conversion
The emission spectrum and up-conversion of setpoint color light material of main part is arranged in the corresponding wavelength of the wave crest of the absorption spectrum of material
Absorption spectrum reach wave crest at Same Wavelength, at the wavelength, setpoint color light material of main part release energy reach most
Big value, the energy that up-conversion can absorb equally reach maximum value, up-conversion are absorbed to the full extent
The energy of setpoint color light material of main part release issues blue light, further increases blue pixel area in organic light emitting display panel
Luminous efficiency.
It should be noted that the corresponding wavelength of wave crest etc. of the emission spectrum of setpoint color light material of main part mentioned here
In the emission spectrum of the corresponding wavelength of the wave crest of the absorption spectrum of up-conversion and non-limiting setpoint color light material of main part
The corresponding wavelength of wave crest will be exactly equal to the corresponding wavelength of wave crest of the absorption spectrum of up-conversion, it can be understood as material is permitted
Perhaps in the case of, the corresponding wavelength of wave crest of the emission spectrum of setpoint color light material of main part is approximately equal to the absorption of up-conversion
The corresponding wavelength of the wave crest of spectrum.
Optionally, the amount of the substance of setpoint color light material of main part 11 and up-conversion 12 in doped structure can be set
The ratio between the amount of substance be more than or equal to 1:1, be less than or equal to 1:0.01, the unit of the amount of substance is mole here.Specifically, if setting
Determine the substance of the setpoint color light material of main part 11 in the doped structure that color of light material of main part 11 and up-conversion 12 are formed
Amount it is excessive, the light of setpoint color that will lead to the sending of setpoint color light material of main part 11 can not be turned completely by up-conversion 12
It is changed to blue light, influences the display color of blue pixel area B, such as setpoint color light material of main part 11 is red light material or green light
The content of material, feux rouges material of main part or green light material of main part excessively can all make the light emitting functional layer 1 of blue pixel area B
Pure blue light emitting peak can not be obtained.If in the doped structure that setpoint color light material of main part 11 and up-conversion 12 are formed
Setpoint color light material of main part 11 content it is very few, will be greatly reduced setpoint color light material of main part 11 to blue pixel area
The improvement of the blue light luminous efficiency of B.
Optionally, as shown in Figure 1, forming micro-cavity structure between first electrode 21 and second electrode 24, along perpendicular to substrate
The direction of 20 place planes, the distance between first electrode 21 and second electrode 24 are the long d of chamber of micro-cavity structure, be can be set micro-
The long d of the chamber of cavity configuration is more than or equal to 170nm, is less than or equal to 230nm.Specifically, micro-cavity structure can use light refractive index not
Light, is limited in the wavelength region of a very little by the effects such as reflection, total reflection, interference, diffraction or scattering on continuous interface
It is interior, can by the long setting of chamber and and micro-cavity structure in each thicknesses of layers setting, make in the shining of light emitting functional layer 1
The heart is located near the enhancing peak of micro-cavity structure standing internal wave field, to improve the coupling efficiency of device Radiating dipole and intracavitary electric field,
To improve the luminous efficiency of device.
Optionally, organic light emitting display panel can be top emitting device.Specifically, top emitting device is relative to bottom emitting
Its luminous efficiency of device is higher, and setting organic light emitting display panel is top emitting device, can be by setpoint color light main body
The advantage of 11 level-density parameter of material improves the blue light luminous efficiency of blue pixel area B, extends the organic light emitting display panel service life
While, further increase the blue light luminous efficiency of blue pixel area B.
In the long d of the chamber of the micro-cavity structure of the different luminescent color pixel regions of adjusting, need to combine actual process requirement, no
With between luminescent color pixel region luminescent layer characteristic and the hole and electronics of each pixel region transmission balance etc. factors it is comprehensive
Conjunction accounts for, can be long come the chamber for adjusting corresponding micro-cavity structure by adjusting the thickness of film layer each in micro-cavity structure as long as guaranteeing
D, while meeting organic light emitting display panel items spectrophotometric data, so that the compound generation of carrier is in light emitting functional layer
In 1, makes the centre of luminescence of light emitting functional layer 1 as close as possible to the enhancing peak position of microcavity standing wave, enhance interference effect to have improved
The light output efficiency of machine light emitting display panel.The long luminous face corresponding with pixel region of the chamber of the corresponding micro-cavity structure of pixel region
Color wavelength is positively correlated, since the wavelength of different colours light is different, the corresponding microcavity knot of the pixel region of different luminescent colors
The chamber of structure is long different.The chamber that the corresponding micro-cavity structure of green pixel area can be set is long corresponding micro- less than red pixel area
The chamber of cavity configuration is long, and the chamber for being greater than the corresponding micro-cavity structure of blue pixel area is long.
Optionally, the transmitance that second electrode 24 can be set is more than or equal to 40%, is less than or equal to 60%, is preferably provided with the
The transmitance of two electrodes 24 is equal to 50%.The too low luminous efficiency for influencing blue pixel area B of the transmitance of second electrode 24, the
The transmitance of two electrodes 24 is excessively high to be will affect the refraction of light in the micro-cavity structure that organic light emitting display panel is formed and reflected
Journey.Second electrode 24 can be using the material with high work function, such as can be indium tin oxide (ITO) or indium-zinc oxide
(IZO), 21 reflecting electrodes of first electrode, reflecting electrode for example can be by reflecting materials such as silver (Ag), magnesium (Mg) or magnesium silver alloy
Material is constituted.
It should be noted that the embodiment of the present invention shows that attached drawing is only exemplary the size for indicating each film layer, light emitting molecule
The size and distribution density of structure do not represent the actual size of each film layer in organic light emitting display panel, light emitting molecule knot
The actual size and actual distribution density of structure.
Organic light emitting display panel provided in an embodiment of the present invention includes blue pixel area, is constituted in blue pixel area
The material of light emitting functional layer includes setpoint color light material of main part and up-conversion, and the wavelength of setpoint color light is greater than blue light
Wavelength, up-conversion can absorb the energy of setpoint color light material of main part release and emit blue light.Due to setpoint color light
Wavelength be greater than blue light wavelength, by the advantage of setpoint color light material of main part level-density parameter make carrier relative to setting face
The injection barrier of coloured light material of main part is less than injection barrier of the carrier relative to Blue-light emitting host material, setpoint color light main body material
The setting of material improves blue pixel caused by Blue-light emitting host material so that the composite denseness of carrier improves in light emitting functional layer
The low problem of the blue light luminous efficiency in region, improves the blue light luminous efficiency of organic light emitting display panel blue pixel area.
In addition, improving carrier caused by the Blue-light emitting host material of broad-band gap in light emitting functional layer using setpoint color light material of main part
Interface accumulation, damage light-emitting function bed boundary so that influence the organic light emitting display panel service life the problem of.
A kind of organic light-emitting display device that the embodiment of the present invention also provides, Fig. 2 are one kind provided in an embodiment of the present invention
The structural schematic diagram of organic light-emitting display device.As shown in Fig. 2, organic light-emitting display device 91 includes having in above-described embodiment
Machine light emitting display panel 92, therefore organic light-emitting display device provided in an embodiment of the present invention 91 also has institute in above-described embodiment
The beneficial effect of description, details are not described herein again.Illustratively, organic light-emitting display device can be mobile phone, computer or wearable
The electronic equipments such as equipment, the embodiment of the present invention are not construed as limiting the concrete form of organic light-emitting display device.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments here, be able to carry out for a person skilled in the art it is various it is apparent variation, again
Adjustment and substitution are without departing from protection scope of the present invention.Therefore, although by above embodiments to the present invention carried out compared with
For detailed description, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, can be with
Including more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of organic light emitting display panel characterized by comprising
Blue pixel area, the material for constituting light emitting functional layer in the blue pixel area includes setpoint color light material of main part
And up-conversion, the wavelength of setpoint color light are greater than blue light wavelength；
The up-conversion is used to absorb the energy of the setpoint color light material of main part release and emits blue light.
2. organic light emitting display panel according to claim 1, which is characterized in that the setpoint color light material of main part is
Feux rouges material of main part or green light material of main part.
3. organic light emitting display panel according to claim 1, which is characterized in that the setpoint color light material of main part with
The up-conversion forms doped structure.
4. organic light emitting display panel according to claim 3, which is characterized in that set face described in the doped structure
The ratio between the amount of the substance of coloured light material of main part and the amount of substance of the up-conversion are more than or equal to 1:1, are less than or equal to 1:
0.01。
5. organic light emitting display panel according to claim 1, which is characterized in that the setpoint color light material of main part
The absorption spectrum of emission spectrum and the up-conversion exists overlapping.
6. organic light emitting display panel according to claim 5, which is characterized in that the setpoint color light material of main part
Emission spectrum wavelength corresponding with the overlapping part of the absorption spectrum of the up-conversion is more than or equal to 500nm, is less than or equal to
1000nm。
7. organic light emitting display panel according to claim 5, which is characterized in that the setpoint color light material of main part
The corresponding wavelength of the wave crest of emission spectrum is equal to the corresponding wavelength of wave crest of the absorption spectrum of the up-conversion.
8. organic light emitting display panel according to claim 1, which is characterized in that the up-conversion includes that metal has
Machine chelate.
9. organic light emitting display panel according to claim 1, which is characterized in that the organic light emitting display panel includes
Substrate, the blue pixel area include along the first electrode being arranged far from the orientation substrate, the first auxiliary light emission layer, shine
Functional layer, the second auxiliary light emission layer and second electrode, form micro-cavity structure between the first electrode and the second electrode；
The direction of plane where perpendicular to the substrate, the distance between the first electrode and the second electrode are described
The chamber of micro-cavity structure is long, and the chamber of the micro-cavity structure is long to be more than or equal to 170nm, is less than or equal to 230nm.
10. a kind of organic light-emitting display device, which is characterized in that aobvious including the described in any item organic light emissions of claim 1-9
Show panel.
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| WO2017159797A1 (en) * | 2016-03-18 | 2017-09-21 | シャープ株式会社 | El element and el element production method |
| CN108336119A (en) * | 2018-03-20 | 2018-07-27 | 京东方科技集团股份有限公司 | Pixel unit, dot structure and display panel |
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