CN110148677A - A kind of organic electroluminescence device, display panel and display device - Google Patents
A kind of organic electroluminescence device, display panel and display device Download PDFInfo
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- CN110148677A CN110148677A CN201910485873.9A CN201910485873A CN110148677A CN 110148677 A CN110148677 A CN 110148677A CN 201910485873 A CN201910485873 A CN 201910485873A CN 110148677 A CN110148677 A CN 110148677A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- 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
- H10K50/125—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
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- H—ELECTRICITY
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Abstract
The invention discloses a kind of organic electroluminescence devices, display panel and display device, it is greater than cavity type material proportion by the electron type material proportion in the luminous composite construction by organic electroluminescence device close to cathode layer side, cavity type material proportion in luminous composite construction close to anode layer side is greater than electron type material proportion, when luminous, the electronics in cathode layer can be made to be readily transferred in luminous composite construction close to the side of cathode layer, it is readily transferred to the hole in anode layer in luminous composite construction close to the side of anode layer, to guarantee the recombination site control of electrons and holes in the composite construction that shines, electrons and holes are avoided to be diffused into quenching caused by other layers, electrons and holes recombination site can be reduced to be biased to stop the probability of bed boundary, it reduces in the wind for stopping bed boundary deterioration Danger, improves the balanced capacity of carrier in organic electroluminescence device, to reduce light emission luminance decaying and improve current efficiency.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of organic electroluminescence device, display panel and display dress
It sets.
Background technique
Organic electroluminescence device (Organic Light Emitting Diode, OLED) is due to the high, color with brightness
Coloured silk saturation, it is frivolous, flexible the advantages that and receive FPD and the great attention of lighting area.
In organic electroluminescence device structure, electrons and holes are injected from cathode and anode respectively, in shining for device
Recombination luminescence in layer.Therefore, the electrons and holes quantity being transmitted in luminescent layer has organic electroluminescence device performance
Important function.There are some technical problems for organic electroluminescence device structure at present, such as since electrons and holes are in luminescent layer
The difference of transmission characteristic will lead to the center that luminescent layer is deviateed in electrons and holes complex centre.When electrons and holes are compound
When center is close to electronic barrier layer or hole barrier bed boundary, it is easier interfacial aging occur in interface, causes organic electroluminescence
The brightness decay of luminescent device, the problems such as current efficiency is low.
Summary of the invention
The embodiment of the present invention provides a kind of organic electroluminescence device, display panel and display device, above-mentioned to solve
The problems of the prior art.
Therefore, the embodiment of the invention provides a kind of organic electroluminescence devices, comprising: the cathode layer and sun being oppositely arranged
Pole layer, and the luminous composite construction between the cathode layer and the anode layer；Mixing in the luminous composite construction
There are hole profile material, electron type material and luminescent dopant material；Wherein, close to the cathode layer one in the luminous composite construction
The electron type material proportion of side is greater than cavity type material proportion, the close anode layer in the luminous composite construction
The cavity type material proportion of side is greater than electron type material proportion.
Optionally, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, the hair
Photoreactivation structure only includes one layer of luminescent layer, and the direction of the anode layer, the electricity in the luminescent layer are directed toward along the cathode layer
Subtype material proportion gradually decreases, and the cavity type material proportion in the luminescent layer gradually increases.
Optionally, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, the hair
Photoreactivation structure includes at least two-layer luminescent layer, the electron type material institute accounting in the outermost luminescent layer of the cathode layer
Example is greater than cavity type material proportion, and the cavity type material proportion in the outermost luminescent layer of the anode layer is big
In electron type material proportion.
Optionally, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, the hair
Photoreactivation structure includes the first luminescent layer and the second luminescent layer, and first luminescent layer is close to the cathode layer, second hair
Photosphere is close to the anode layer.
Optionally, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, the hair
Photoreactivation structure further includes the third luminescent layer between first luminescent layer and second luminescent layer, the third hair
Electron type material proportion in photosphere is equal to cavity type material proportion.
Optionally, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, described
The thickness of one luminescent layer is identical with the thickness of second luminescent layer, and the thickness of the third luminescent layer is less than described first and shines
The thickness of layer.
Optionally, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, described
The thickness of one luminescent layer and second luminescent layer is 10nm-20nm, the third luminescent layer with a thickness of 10nm-15nm.
Optionally, in the specific implementation, each described in above-mentioned organic electroluminescence device provided in an embodiment of the present invention
Cavity type material in luminescent layer is identical or different, and the electron type material in each luminescent layer is identical or different.
Optionally, in the specific implementation, each described in above-mentioned organic electroluminescence device provided in an embodiment of the present invention
Luminescent dopant material in luminescent layer is identical.
Correspondingly, the embodiment of the invention also provides a kind of display panels, including above-mentioned provided in an embodiment of the present invention
One organic electroluminescence device.
Correspondingly, the embodiment of the invention also provides a kind of display device, including it is provided in an embodiment of the present invention above-mentioned aobvious
Show panel.
Beneficial effects of the present invention:
Organic electroluminescence device, display panel and display device provided in an embodiment of the present invention, by by organic electroluminescence
Electron type material proportion in the luminous composite construction of luminescent device close to cathode layer side is greater than shared by cavity type material
Ratio, shine composite construction in close to anode layer side cavity type material proportion be greater than electron type material proportion,
When luminous, the electronics in cathode layer can be made to be readily transferred to make anode close to the side of cathode layer in luminous composite construction
Hole in layer is readily transferred in luminous composite construction close to the side of anode layer, to guarantee the compound position of electrons and holes
Set control avoids electrons and holes from being diffused into quenching caused by other layers in the composite construction that shines, therefore multiple by that will shine
It closes electron type material and cavity type material in structure at different location to be designed by different proportion, electronics can be substantially reduced
It is biased to stop the probability of bed boundary with hole-recombination position, reduce in the risk for stopping bed boundary deterioration, improve organic electroluminescence hair
The balanced capacity of carrier in optical device, so as to reduce light emission luminance decaying and improve current efficiency.
Detailed description of the invention
Fig. 1 is one of the structural schematic diagram of organic electroluminescence device provided in an embodiment of the present invention；
Fig. 2 is the second structural representation of organic electroluminescence device provided in an embodiment of the present invention；
Fig. 3 is the third structural representation of organic electroluminescence device provided in an embodiment of the present invention；
Fig. 4 A and Fig. 4 B execute each step in the structure for preparing organic electroluminescence device to be provided in an embodiment of the present invention
Structural schematic diagram after rapid.
Specific embodiment
In order to make the purpose of the present invention, the technical scheme and advantages are more clear, with reference to the accompanying drawing, to the embodiment of the present invention
The specific embodiment of the organic electroluminescence device of offer, display panel and display device is described in detail.
Each layer film thickness and shape do not reflect the actual proportions of organic electroluminescence device in attached drawing, and purpose is only illustrated
Illustrate the content of present invention.
Organic electroluminescence device provided in an embodiment of the present invention, as shown in Figure 1 to Figure 3, comprising: the cathode being oppositely arranged
Layer 1 and anode layer 2, and the luminous composite construction 3 between cathode layer 1 and anode layer 2；The interior mixing of the composite construction 3 that shines
There are hole profile material, electron type material and luminescent dopant material；Wherein, close to the electricity of 1 side of cathode layer in luminous composite construction 3
Subtype material proportion is greater than cavity type material proportion, close to the cavity type of 2 side of anode layer in the composite construction 3 that shines
Material proportion is greater than electron type material proportion.
Organic electroluminescence device provided in an embodiment of the present invention, by by the luminous composite junction of organic electroluminescence device
Electron type material proportion in structure close to cathode layer side is greater than cavity type material proportion, leans in the composite construction that shines
The cavity type material proportion of nearly anode layer side, which is greater than electron type material proportion, can make cathode layer when luminous
In electronics be readily transferred to shine composite construction in close to cathode layer side, make the hole in anode layer be readily transferred to send out
Close to the side of anode layer in photoreactivation structure, to guarantee that the recombination site of electrons and holes is controlled in luminous composite construction
It is interior, avoid electrons and holes from being diffused into quenching caused by other layers, therefore by will be in luminous composite construction at different location
Electron type material and cavity type material are designed by different proportion, can be substantially reduced electrons and holes recombination site and are biased to resistance
The probability at barrier interface reduces in the risk for stopping bed boundary deterioration, improves the balance of carrier in organic electroluminescence device
Ability, so as to reduce light emission luminance decaying and improve current efficiency.
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, such as scheme
Shown in 1, the composite construction 3 that shines only includes one layer of luminescent layer 3 ', along the direction of the direction anode layer 2 of cathode layer 1, luminescent layer 3 '
Electron type material proportion gradually decreases, and the cavity type material proportion in luminescent layer gradually increases.It can make to send out in this way
Electron type material proportion in photosphere 3 ' close to 1 side of cathode layer is greater than cavity type material proportion, in luminescent layer 3 '
Cavity type material proportion close to 2 side of anode layer, which is greater than electron type material proportion, can make cathode when luminous
Electronics in layer 1 is readily transferred to the side in luminescent layer 3 ' close to cathode layer 1, is readily transferred to the hole in anode layer 2
Close to the side of anode layer 2 in luminescent layer 3 ', so that the recombination site control for guaranteeing electrons and holes avoids in luminescent layer 3 '
Electrons and holes are diffused into quenching caused by other layers, thus by by luminescent layer 3 ' at different location electron type material and
Cavity type material is designed by different proportion, can be substantially reduced electrons and holes recombination site and is biased to stop the several of bed boundary
Rate reduces in the risk for stopping bed boundary deterioration, improves the balanced capacity of carrier in organic electroluminescence device, so as to
It reduces light emission luminance decaying and improves current efficiency.
Further, in the specific implementation, it in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, shines
Composite construction includes that at least two-layer luminescent layer, the electron type material proportion in the outermost luminescent layer of cathode layer is greater than
Cavity type material proportion, the cavity type material proportion in the outermost luminescent layer of anode layer are greater than electronics profile
Expect proportion.As shown in Fig. 2, the composite construction 3 that shines includes two-layer luminescent layer, specifically, the composite construction 3 that shines includes first
Luminescent layer 31 and the second luminescent layer 32, the first luminescent layer 31 is close to cathode layer 1, and the second luminescent layer 32 is close to anode layer 2.In this way may be used
The electron type material proportion in the first luminescent layer 31 is set greater than cavity type material proportion, second is shone
Cavity type material proportion in layer 32 is set greater than electron type material proportion, when luminous, can make cathode layer 1
In electronics be readily transferred in the first luminescent layer 31, be readily transferred to the hole in anode layer 2 in second luminescent layer 32, can
So that the recombination site of electrons and holes is located at 32 region of the first luminescent layer 31 and the second luminescent layer, electrons and holes is avoided to spread
It is quenched to caused by other layers, substantially reduces electrons and holes recombination site and be biased to stop the probability of bed boundary, reduction is stopping
The risk of bed boundary deterioration, improves the balanced capacity of carrier in organic electroluminescence device, so as to reduce light emission luminance
Decaying and raising current efficiency.As shown in figure 3, the composite construction 3 that shines includes three layers of luminescent layer, specifically, shine composite junction
Structure 3 includes the first luminescent layer 31 and the second luminescent layer 32, and the first luminescent layer 31 is close to cathode layer 1, and the second luminescent layer 32 is close to sun
Pole layer 2, the composite construction 3 that shines further include the third luminescent layer 33 between the first luminescent layer 31 and the second luminescent layer 32, the
Electron type material proportion in three luminescent layers 33 is equal to cavity type material proportion.By will be in third luminescent layer 33
Electron type material proportion is set equal to cavity type material proportion, can further make answering for electrons and holes in this way
Coincidence avoids electrons and holes from being diffused into quenching caused by other layers, further decreases setting in the region of third luminescent layer 33
Electrons and holes recombination site is biased to stop the probability of bed boundary, reduces in the risk for stopping bed boundary deterioration, improves Organic Electricity
The balanced capacity of carrier in electroluminescence device, so as to further decrease light emission luminance decaying and improve current efficiency.
It should be noted that the electron type material in third luminescent layer 33 described in present invention embodiment shown in Fig. 3
Proportion is equal to cavity type material proportion, wherein it is approximately equal equal to referring to, there can be certain deviation.
It should be noted that in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention,
Ratio in electron type material proportion and cavity type material proportion can be mass ratio, electronics profile in each luminescent layer
Material proportion and cavity type material proportion can be adjusted according to practical luminous needs.
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, such as scheme
Shown in 2 and Fig. 3, the thickness of the thickness of the first luminescent layer 31 and the second luminescent layer 32 can be respectively according to the electronics of electron type material
Mobility and the hole mobility of cavity type material are adjusted.General transfer rate is bigger, and illuminating accordingly the thickness of layer also should be compared with
It is thick.
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, such as scheme
Shown in 2 and Fig. 3, the thickness of the thickness of the first luminescent layer 31 and the second luminescent layer 32 can be identical, the thickness of third luminescent layer 33
It can be less than the thickness of the first luminescent layer 31.
It should be noted that the thickness of the first luminescent layer 31 described in Fig. 2 of the present invention and embodiment shown in Fig. 3 and the
The thickness of two luminescent layers 32 is identical, refers to approximately uniform wherein identical, can there is certain deviation.
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, such as scheme
Shown in 2 and Fig. 3, the thickness of the first luminescent layer 31 and the second luminescent layer 32 can be 10nm-20nm, the thickness of third luminescent layer 33
Degree can be 10nm-15nm.
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, such as scheme
1 to shown in Fig. 3, and the cavity type material in each luminescent layer is identical or different, i.e., the cavity type material in each luminescent layer can be same
A kind of material, or not same material；Electron type material in each luminescent layer is identical or different, i.e., the electricity in each luminescent layer
Subtype material can be same material, or not same material.
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, hole
Profile material is usually amino benzenes compounds, and electron type material is usually glyoxaline compound.Specifically, cavity type material can be
The compounds such as triphenylamine, (biphenyl) diamines, carbazole, it is preferable that cavity type material can be with are as follows: N, N'- diphenyl-[1,1'- biphenyl
Base] -4,4'- diamines, phenyl-[1,1'- diphenyl] -4,4'- diamines, tri- amido benzene of 1,3,5-, 4,4', 4 "-three (N, N- hexichol
Base amido), N, N'- bis- (1- naphthalene)-N, N'- diphenyl -1,1'- biphenyl -4-4'- diamines (NPB), triphenyl diamine derivative
(TPD), TPTE, 1,3,5- tri- (N-3- methylphenyl-N-phenyl amino) benzene (TDAB) etc..Electron type material can be evil two
The compounds such as azoles, imidazoles, pyridine quinoline, imines, it is preferable that electron type material can be with are as follows: 2- (4- diphenyl) -5- (tertiary fourth of 4-
Phenyl) -1,3,4- oxadiazoles, 2- (4- xenyl) -5- phenyl oxadiazoles (PBD), (N- phenyl -2- benzimidazole-of 1,3,5- tri-
2) benzene 41, poly- (1,2- ethenylidene pyridine), diimine etc..
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, such as scheme
1 to shown in Fig. 3, and the luminescent dopant material in each luminescent layer is identical, i.e., the luminescent dopant material in each luminescent layer is same material
Material, so as to issue monochromatic light, can form single color light emitting devices.
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, such as scheme
1 to shown in Fig. 3, further including the electronics note being cascading between cathode layer 1 and the first luminescent layer 31 backwards to cathode layer 1
Enter layer 4, electron transfer layer 5 and hole blocking layer 6, and between anode layer 2 and the second luminescent layer 32 backwards to anode layer 2 according to
The secondary hole injection layer 7 being stacked, hole transmission layer 8 and electronic barrier layer 9.By increasing above-mentioned electricity in luminescent layer two sides
Son/hole injection layer, electrons transport layer, electrons barrier layer are for adjusting organic electroluminescence device knot
The quantity of electrons and holes in structure and design.By the design of above-mentioned each functional layer, in organic electroluminescence device each layer it
Between energy level difference be substantially reduced, the electrons and holes quantity for being transmitted to luminous bed boundary significantly rises, improve luminous efficiency.
To sum up, the embodiment of the present invention is by being prepared into 2~3 hairs for the luminescent layer of conventional organic electroluminescence device structure
Photosphere, each luminescent layer include electron type material, cavity type material and luminescent dopant material, and each luminescent layer is only electronics
Profile material is different with cavity type material proportion, design in this way, can be obvious to avoid existing between two luminescent layers
Device degradation caused by interface, service life are deteriorated.In addition, the electron type material and hole profile different by proportion in three layers
Material design, the recombination luminescence that can substantially reduce electrons and holes are located proximate to stop bed boundary, reduce and are stopping bed boundary bad
The risk of change.Therefore each luminescent layer has different electronics/skies in organic electroluminescence device provided in an embodiment of the present invention
Cave transmission characteristic reaches optimal electric current effect to improve carrier balance ability in the luminescent layer of organic electroluminescence device
Rate reduces the characteristics such as life time decay.
Further, in the specific implementation, in above-mentioned organic electroluminescence device provided in an embodiment of the present invention, anode
The material of layer can be indium doping tin oxide (ITO), and the material of cathode layer can be Mg/Ag alloy.
Further, in the specific implementation, the structure of organic electroluminescence device provided in an embodiment of the present invention can be
Just set structure, or inverted structure is not specifically limited.
Further, in the specific implementation, above-mentioned organic electroluminescence device provided in an embodiment of the present invention, which is positive, sets knot
Structure further includes as shown in Figure 1 to Figure 3 positioned at the reflecting layer 12 that anode layer 2 is cascading backwards to 1 side of cathode layer, driving
Circuit 11 and underlay substrate 10, and positioned at cathode layer 1 backwards to the protective layer 13 of 2 side of anode layer.
It is positive below by specific embodiment to Fig. 3 of embodiment of the present invention organic electroluminescence device provided when setting structure
Preparation method be described in detail.Specifically, the preparation method of each film layer includes but is not limited in organic electroluminescence device
One of spin-coating method, vapour deposition method, chemical vapour deposition technique, physical vaporous deposition, magnetron sputtering method etc. are a variety of.
(1) underlay substrate 10 is cleaned, driving circuit 11 is made on the underlay substrate 10 cleaned up, driving circuit 11 is used
In the pixel region for lighting organic electroluminescence device, as shown in Figure 4 A；Specifically, underlay substrate 10 can be glass substrate
Deng.
(2) it is successively made on the underlay substrate 10 for be formed with driving circuit 11 using the methods of vacuum evaporation or inkjet printing
Make reflecting layer 12, anode layer 2, hole injection layer 7, hole transmission layer 8, electronic barrier layer 9, the second luminescent layer 32, third shine
The 33, first luminescent layer 31 of layer, hole blocking layer 6, electron transfer layer 5, electron injecting layer 4, cathode layer 1 and protective layer 13, such as scheme
Shown in 4B.
Organic electroluminescence device shown in the above-mentioned Fig. 4 B being prepared of the embodiment of the present invention, which is positive, sets structure, exists certainly
When it is implemented, the organic electroluminescence device of inverted structure can also be prepared, and specifically, the organic electroluminescent of inverted structure
Device is that driving circuit, reflecting layer, cathode layer, electron injecting layer, electron transfer layer, hole resistance are successively made on underlay substrate
Barrier, the first luminescent layer, third luminescent layer, the second luminescent layer, electronic barrier layer, hole transmission layer, hole injection layer, anode layer
And protective layer；The specific preparation flow of the organic electroluminescence device of inverted structure may refer to the above-mentioned Organic Electricity for just setting structure
The preparation method of electroluminescence device is only that the preparation sequence of each film layer changes, and it is not described here in detail.
The present invention with no restrictions, is such as not limited to bottom and goes out light or ejection light to the emission type of organic electroluminescence device.?
When it is implemented, being located at organic electroluminescence device in anode layer and cathode layer to go out the electrode of light side is transparent electrode.
When it is implemented, organic electroluminescence device provided in an embodiment of the present invention can also include those skilled in the art
Well known other functional film layers, it is not described here in detail.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display panels, including the embodiment of the present invention to mention
The above-mentioned organic electroluminescence device supplied.The principle that the display panel solves the problems, such as is similar to aforementioned organic electroluminescence device,
Therefore the implementation of the display panel may refer to the implementation of aforementioned organic electroluminescence device, and repeating place, details are not described herein.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display devices, including the embodiment of the present invention to mention
The above-mentioned display panel supplied.The principle that the display device solves the problems, such as is similar to aforementioned organic electroluminescence device, therefore this is aobvious
The implementation of showing device may refer to the implementation of aforementioned organic electroluminescence device, and repeating place, details are not described herein.
Organic electroluminescence device, display panel and display device provided in an embodiment of the present invention, by by organic electroluminescence
Electron type material proportion in the luminous composite construction of luminescent device close to cathode layer side is greater than shared by cavity type material
Ratio, shine composite construction in close to anode layer side cavity type material proportion be greater than electron type material proportion,
When luminous, the electronics in cathode layer can be made to be readily transferred to make anode close to the side of cathode layer in luminous composite construction
Hole in layer is readily transferred in luminous composite construction close to the side of anode layer, to guarantee the compound position of electrons and holes
Set control avoids electrons and holes from being diffused into quenching caused by other layers in the composite construction that shines, therefore multiple by that will shine
It closes electron type material and cavity type material in structure at different location to be designed by different proportion, electronics can be substantially reduced
It is biased to stop the probability of bed boundary with hole-recombination position, reduce in the risk for stopping bed boundary deterioration, improve organic electroluminescence hair
The balanced capacity of carrier in optical device, so as to reduce light emission luminance decaying and improve current efficiency.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (11)
1. a kind of organic electroluminescence device characterized by comprising the cathode layer and anode layer being oppositely arranged, and be located at
Luminous composite construction between the cathode layer and the anode layer；Be mixed in the luminous composite construction cavity type material,
Electron type material and luminescent dopant material；Wherein, close to the electronics profile of the cathode layer side in the luminous composite construction
Expect that proportion is greater than cavity type material proportion, the cavity type of the close anode layer side in the luminous composite construction
Material proportion is greater than electron type material proportion.
2. organic electroluminescence device as described in claim 1, which is characterized in that the luminous composite construction only includes one layer
Luminescent layer is directed toward the direction of the anode layer along the cathode layer, and the electron type material proportion in the luminescent layer is gradually
It reduces, the cavity type material proportion in the luminescent layer gradually increases.
3. organic electroluminescence device as described in claim 1, which is characterized in that the luminous composite construction includes at least two
Layer luminescent layer, the electron type material proportion in the outermost luminescent layer of the cathode layer are greater than shared by cavity type material
Ratio, the cavity type material proportion in the outermost luminescent layer of the anode layer are greater than electron type material institute accounting
Example.
4. organic electroluminescence device as claimed in claim 2, which is characterized in that the luminous composite construction includes the first hair
Photosphere and the second luminescent layer, first luminescent layer is close to the cathode layer, and second luminescent layer is close to the anode layer.
5. organic electroluminescence device as claimed in claim 4, which is characterized in that the luminous composite construction further includes being located at
Third luminescent layer between first luminescent layer and second luminescent layer, the electron type material institute in the third luminescent layer
Accounting example is equal to cavity type material proportion.
6. organic electroluminescence device as claimed in claim 5, which is characterized in that the thickness of first luminescent layer and described
The thickness of second luminescent layer is identical, and the thickness of the third luminescent layer is less than the thickness of first luminescent layer.
7. organic electroluminescence device as claimed in claim 6, which is characterized in that first luminescent layer and second hair
The thickness of photosphere is 10nm-20nm, the third luminescent layer with a thickness of 10nm-15nm.
8. organic electroluminescence device as claimed in claim 3, which is characterized in that the cavity type material in each luminescent layer
Identical or different, the electron type material in each luminescent layer is identical or different.
9. organic electroluminescence device as claimed in claim 3, which is characterized in that the luminescent dopant material in each luminescent layer
Expect identical.
10. a kind of display panel, which is characterized in that including such as described in any item organic electroluminescence devices of claim 1-9.
11. a kind of display device, which is characterized in that including display panel as claimed in claim 10.
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| CN201910485873.9A CN110148677A (en) | 2019-06-05 | 2019-06-05 | A kind of organic electroluminescence device, display panel and display device |
| PCT/CN2020/075942 WO2020244252A1 (en) | 2019-06-05 | 2020-02-20 | Organic light-emitting device, display panel and display device |
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| CN201910485873.9A CN110148677A (en) | 2019-06-05 | 2019-06-05 | A kind of organic electroluminescence device, display panel and display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635061A (en) * | 2019-10-23 | 2019-12-31 | 昆山国显光电有限公司 | Display panel and display device |
| CN111584728A (en) * | 2020-05-22 | 2020-08-25 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display panel |
| WO2020244252A1 (en) * | 2019-06-05 | 2020-12-10 | 京东方科技集团股份有限公司 | Organic light-emitting device, display panel and display device |
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| CN110148677A (en) * | 2019-06-05 | 2019-08-20 | 京东方科技集团股份有限公司 | A kind of organic electroluminescence device, display panel and display device |
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| CN1362746A (en) * | 2000-12-28 | 2002-08-07 | 株式会社半导体能源研究所 | Light-emitting device |
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| WO2020244252A1 (en) * | 2019-06-05 | 2020-12-10 | 京东方科技集团股份有限公司 | Organic light-emitting device, display panel and display device |
| CN110635061A (en) * | 2019-10-23 | 2019-12-31 | 昆山国显光电有限公司 | Display panel and display device |
| CN111584728A (en) * | 2020-05-22 | 2020-08-25 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display panel |
| WO2021233130A1 (en) * | 2020-05-22 | 2021-11-25 | 京东方科技集团股份有限公司 | Display substrate and manufacturing method therefor, and display panel |
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