CN103700781A - Organic light-emitting device, display substrate and organic electroluminescence display - Google Patents
Organic light-emitting device, display substrate and organic electroluminescence display Download PDFInfo
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- CN103700781A CN103700781A CN201310728240.9A CN201310728240A CN103700781A CN 103700781 A CN103700781 A CN 103700781A CN 201310728240 A CN201310728240 A CN 201310728240A CN 103700781 A CN103700781 A CN 103700781A
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- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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Abstract
The invention discloses an organic light-emitting device, a display substrate and an organic electroluminescence display. The organic light-emitting device comprises a transparent substrate and a light scattering layer, a first transparent electrode, an electroluminescence layer and a second electrode which are sequentially formed on the transparent substrate, wherein the light scattering layer comprises a light scattering film and multiporous scattering particles which are distributed in the light scattering film. The organic light-emitting device disclosed by the embodiment of the invention has the beneficial effects that the light scattering layer of the organic light-emitting device comprises the light scattering film and the multiporous scattering particles which are distributed in the light scattering film; by the virtue of the scattering particles, the full reflection of the light inside the organic light-emitting device on an interface of the first transparent electrode and the substrate as well as a substrate-air interface can be alleviated, so that the light output efficiency of the organic light-emitting device is improved; furthermore, a preparation technology for the light scattering layer in the organic light-emitting device is simpler, so that the production cost can be reduced easily.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to organic electroluminescence device, display base plate and display of organic electroluminescence.
Background technology
Organic electroluminescence device (Organic Light-Emitting Device, OLED) is because the important application prospect at flat panel display field and lighting field is studied widely.At present, the inside conversion quantum efficiency of OLED, device inside hole and electronics approach 100% in conjunction with the rear efficiency that is all converted to photon, and still, the outside conversion quantum efficiency of OLED is lower, and its main cause is to be subject to the restriction of light output efficiency.The reason that affects oled light delivery efficiency is as follows: the inner light producing of OLED, when device inside transmits, due to not the mating of optical coefficient, can produce refraction or reflection at various material interfaces place, even total reflection, thus cause the loss of light.
The total reflection phenomenon of above-mentioned OLED inside has following situation conventionally:
1, occur in the transparency electrode of OLED and the interface of underlay substrate, light is limited in the ITO and organic layer of high index of refraction, finally by layers of material, absorbed or penetrate from OLED border, this situation is called as waveguide mode.
2, occur in underlay substrate and air interface place, make light be confined to underlay substrate inside, be called substrate mode.The situation that simultaneously causes light output to lose also comprises the energy cancellation of the luminous dipole causing due to metallic cathode, is called surface plasma mode.This several mode causes approximately 80% photon loss above, and the light output efficiency of final OLED is only 20% left and right, therefore will improve the outside conversion quantum efficiency of OLED, must improve light output efficiency.In order to improve oled light delivery efficiency, some light-enhancing structures can be set at the outer surface of underlay substrate, as change the roughness on underlay substrate surface or set up one deck microlens array, this method technique ratio is easier to realize, but because the waveguide mode time cannot arrive the outer surface of underlay substrate, in this way can only reduce the photon loss of substrate mode, little on the impact of waveguide mode time loss; Another conventional method is to set up one deck light scattering layer between transparent the first electrode and underlay substrate, when light sends from luminescent layer, transmission is through transparent electrode layer, impinge upon on light scattering layer and be scattered, part light when waveguide mode and substrate mode can be gone out to be less than the scattered through angles of critical angle, can enter into air, so can effectively increase the output of light, but the preparation method of light scattering layer technique more complicated often in prior art, and obtained effect also has very large room for promotion.
Summary of the invention
The object of this invention is to provide organic electroluminescence device, display base plate and display of organic electroluminescence, to improve the light output efficiency of organic electroluminescence device.
The object of the invention is to be achieved through the following technical solutions:
The embodiment of the present invention provides a kind of organic electroluminescence device, comprising:
Transparency carrier, is formed at the light scattering layer on described transparency carrier, transparent the first electrode, electroluminescence layer and the second electrode successively; The scattering particles that described light scattering layer comprises light-diffusing films and is distributed in the multiple hole in described light-diffusing films.In the embodiment of the present invention, the scattering particles of multiple hole can reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, thereby improve the light output efficiency of organic electroluminescence device.
Preferably, the scattering particles of described multiple hole are formed by molecular sieve, and described molecular sieve comprises any one in Si-Al zeolite molecular sieve, total silicon zeolite molecular sieve, heteroatoms zeolite molecular sieve, aluminium phosphate molecular sieve, mesopore molecular sieve and metallic organic framework molecular sieve.
Preferably, the diameter of the scattering particles of described multiple hole is 10-500 nanometer.
The diameter of the hole of the scattering particles of described multiple hole is 0.3-100 nanometer.
Preferably, the containing ratio of the scattering particles of described multiple hole in described light scattering layer is for being more than or equal to 1%, to realize by higher light extraction efficiency.
Preferably, the thickness of described light scattering layer is for being more than or equal to 10 nanometers, to realize by higher light extraction efficiency.
Preferably, the refractive index of described light-diffusing films be more than or equal to described electroluminescence layer refractive index 90%.
Embodiment of the present invention beneficial effect is as follows: the light scattering layer of organic electroluminescence device comprises light-diffusing films and is arranged at the scattering particles of the some multiple holes in light-diffusing films, the scattering particles of multiple hole can reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, thereby improve the light output efficiency of organic electroluminescence device; In addition, in the present invention, the preparation technology of light scattering layer is fairly simple, is easy to reduce production costs.
The embodiment of the present invention provides a kind of display base plate, comprises the organic electroluminescence device described in as above embodiment.
Embodiment of the present invention beneficial effect is as follows: the light scattering layer of organic electroluminescence device comprises light-diffusing films and is arranged at the scattering particles of the some multiple holes in light-diffusing films, the scattering particles of multiple hole can reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, thereby improve the light output efficiency of organic electroluminescence device, and then improve the luminous efficiency of display base plate; In addition, in the present invention, the preparation technology of light scattering layer is fairly simple, is easy to reduce production costs.
The embodiment of the present invention provides a kind of display of organic electroluminescence, comprises the display base plate described in as above embodiment.
Embodiment of the present invention beneficial effect is as follows: the light scattering layer of organic electroluminescence device comprises light-diffusing films and is arranged at the scattering particles of the some multiple holes in light-diffusing films, the scattering particles of multiple hole can reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, thereby improve the light output efficiency of organic electroluminescence device, and then improve the luminous efficiency of the organic electroluminescence device display of this organic electroluminescence device of application; In addition, in the present invention, the preparation technology of light scattering layer is fairly simple, is easy to reduce production costs.
Accompanying drawing explanation
The structural representation of a kind of organic electroluminescent that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the optical scatter of multiple hole described in the light scattering layer of a kind of organic electroluminescent that Fig. 2 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with Figure of description, the implementation procedure of the embodiment of the present invention is elaborated.It should be noted that same or similar label from start to finish represents same or similar element or has the element of identical or similar functions.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Referring to Fig. 1, the embodiment of the present invention provides a kind of organic electroluminescence device, comprises transparency carrier 1, is formed at successively the light scattering layer 2 on transparency carrier, transparent the first electrode 3, electroluminescence layer 4 and the second electrode 5; The scattering particles 22 that light scattering layer comprises light-diffusing films 21 and is distributed in the multiple hole in light-diffusing films 21.
In the embodiment of the present invention, the scattering particles 22 of multiple hole can reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, thereby improve the light output efficiency of organic electroluminescence device.
Preferably, the scattering particles 22 of multiple hole are formed by molecular sieve, and molecular sieve comprises any one in Si-Al zeolite molecular sieve, total silicon zeolite molecular sieve, heteroatoms zeolite molecular sieve, aluminium phosphate molecular sieve, mesopore molecular sieve and metallic organic framework molecular sieve.It should be noted that, using molecular sieve as the material of preparing the scattering particles of multiple hole above, just preferred embodiments of the present invention.Obviously, take that what can realize scattering particles multiple hole is object, can adopt different alternate materials.
Referring to Fig. 2, show the planar structure schematic diagram of the optical scatter of multiple hole.
Preferably, the diameter R of the scattering particles 22 of multiple hole is 10-500 nanometer.
The diameter r of the hole of the scattering particles 22 of multiple hole is 0.3-100 nanometer.
It should be noted that, in the present invention, on the one hand, the diameter R of the scattering particles 22 of this multiple hole can be the diameter of spherical scattering particles 22, can be also the maximum body breadth of non-spherical scattering particles 22; The opposing party, each scattering particles diameter of formation, shape might not be identical, and diameter control is in certain error scope, so this diameter R refers to the average diameter of scattering particles 22.
Meanwhile, in the present invention, on the one hand, the diameter r of hole can be the diameter of circular hole, can be also the Breadth Maximum of non-circular hole; The sectional view of each hole of same scattering particles 22 can be rule or irregular geometry and can be not identical, and diameter also can be unequal, so diameter r refers to the average diameter of hole.
Preferably, the containing ratio of the scattering particles 22 of multiple hole in light scattering layer is more than 1%, to realize by higher light extraction efficiency.The containing ratio of the scattering particles 22 of multiple hole in light scattering layer can be optimized according to practical situations, to realize optimum light extraction efficiency.
Preferably, the thickness of light scattering layer is for being more than or equal to 10 nanometers, to realize by higher light extraction efficiency.Light scattering layer thickness can be optimized according to practical situations, to realize optimum light extraction efficiency.
Preferably, the refractive index of light-diffusing films 21 be more than or equal to electroluminescence layer 4 refractive index 90%.
Embodiment of the present invention beneficial effect is as follows: the light scattering layer of organic electroluminescence device comprises light-diffusing films and is arranged at the scattering particles of the some multiple holes in light-diffusing films, the scattering particles of multiple hole can reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, thereby improve the light output efficiency of organic electroluminescence device; In addition, in the present invention, the preparation technology of light scattering layer is fairly simple, is easy to reduce production costs.
The embodiment of the present invention provides a kind of display base plate, comprises the as above organic electroluminescence device of embodiment.
Embodiment of the present invention beneficial effect is as follows: the light scattering layer of organic electroluminescence device comprises light-diffusing films and is arranged at the scattering particles of the some multiple holes in light-diffusing films, the scattering particles of multiple hole can reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, thereby improve the light output efficiency of organic electroluminescence device, and then improve the luminous efficiency of display base plate; In addition, in the present invention, the preparation technology of light scattering layer is fairly simple, is easy to reduce production costs.
The embodiment of the present invention provides a kind of display of organic electroluminescence, comprises the as above display base plate of embodiment.
Embodiment of the present invention beneficial effect is as follows: the light scattering layer of organic electroluminescence device comprises light-diffusing films and is arranged at the scattering particles of the some multiple holes in light-diffusing films, the scattering particles of multiple hole can reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, thereby improve the light output efficiency of organic electroluminescence device, and then improve the luminous efficiency of the organic electroluminescence device display of this organic electroluminescence device of application; In addition, in the present invention, the preparation technology of light scattering layer is fairly simple, is easy to reduce production costs.
For the ease of understanding organic electroluminescence device provided by the invention, the embodiment of the present invention provides a kind of preparation method of light scattering layer of organic electroluminescence device, comprising:
Step 1, molecular screen material is made to molecular sieve powder.
Choose the molecular screen material of regulation hole diameter, make the powder of the sieve particle formation that meets application requirements diameter range.For example, utilize ball mill molecular screen material to be ground to form to the sieve particle that meets application requirements diameter range.
Step 2, this molecular sieve powder is mixed with organic solvent.Organic solvent can be the mixed liquor of one or more solvents in ethanol, acetone, cyclohexanol, oxolane, dimethyl sulfoxide (DMSO), dimethyl formamide, ethyl acetate, chloroform, toluene, dimethylbenzene, chlorobenzene, phenol, methyl phenyl ethers anisole.
Step 3, molecular sieve powder is dispersed in organic solvent, make molecular sieve suspension.
Polymer-based material can be polymer or polymerisable monomer.
The optional autopolyester of polymer, polyethers, polystyrene and derivative, epoxy resin, polyacrylate, polyamide or polyurethane.
The optional organic substance from containing sulphur carbon bond, sulphur sulfide linkage, carbon-carbon bond or conjugated structure of polymerisable monomer.For example: sulphur, mercaptoethanol, TGA, dithioglycol, benzenethiol, dimercapto diphenyl sulfide, acrylic acid benzene thioesters, methacrylate benzene thioesters, diphenylmethane diamine, ethylenediamine, diethylamine, aniline, thiophene, methacrylic acid, methylol methyl acrylate, methylol ethyl acrylate, methylol acrylic acid, toluene di-isocyanate(TDI), hexamethylene diisocyanate, maleic anhydride, '-diphenylmethane diisocyanate, different Buddhist diketone vulcabond, hexamethylene diisocyanate biuret, ethene, propylene, the organic substance of butylene or styrene equimolecular segment.
More concrete example is as follows:
For example:
By ZSM-5 molecular sieve (average hole diameter 5-10 nanometer, average particulate diameter 20-50 nanometer) add in toluene, make concentration and be 5% ZSM-5 suspension, at room temperature, with supersonic generator concussion 1 hour, ZSM-5 molecular sieve is dispersed in toluene.
Polymethyl methacrylate (PMMA) is dissolved in toluene, makes concentration and be 5% polymer matrix solution.
Get the above-mentioned ZSM-5 suspension of 1 milliliter being prepared from and the polymer matrix solution of 30 milliliters and evenly mix, adopt spin coating method film forming being placed in drier 8 hours in glass substrate, complete the preparation of light scattering layer.
Again for example:
By Al2O3 molecular sieve (Al2O3 content >92%, average hole diameter 4-10 nanometer, average particulate diameter 100-200 nanometer) add in toluene, make concentration and be 5% Al2O3 molecular sieve suspension, at room temperature, with supersonic generator concussion 1 hour, make Al2O3 molecular sieve in toluene.
Merlon (PC) is dissolved in toluene, makes concentration and be 5% polymer matrix solution.
Get the above-mentioned Al2O3 molecular sieve suspension of 1 milliliter being prepared from and the polymer matrix solution of 20mL and evenly mix, adopt spin coating method film forming being placed in drier 8 hours in glass substrate, complete the preparation of light scattering layer.
It should be noted that, above specific embodiment is only in order to illustrate the present invention, and the present invention is not limited to this.
Embodiment of the present invention beneficial effect is as follows: when being prepared with the light scattering layer of organic electroluminescence devices, the scattering particles of some multiple holes distribute in light-diffusing films, thereby when organic electroluminescence device is applied this light scattering layer, reduce the light of organic electroluminescence device inside in the total reflection at interface and substrate and the air interface place of transparent the first electrode and underlay substrate, improve the light output efficiency of organic electroluminescence device; In addition, in the present invention, the preparation technology of light scattering layer is fairly simple, is easy to reduce production costs.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (9)
1. an organic electroluminescence device, is characterized in that, comprising:
Transparency carrier;
Be formed at successively the light scattering layer on described transparency carrier, transparent the first electrode, electroluminescence layer and the second electrode;
Wherein, the scattering particles that described light scattering layer comprises light-diffusing films and is distributed in the multiple hole in described light-diffusing films.
2. luminescent device as claimed in claim 1, it is characterized in that, the scattering particles of described multiple hole are formed by molecular sieve, and described molecular sieve comprises any one in Si-Al zeolite molecular sieve, total silicon zeolite molecular sieve, heteroatoms zeolite molecular sieve, aluminium phosphate molecular sieve, mesopore molecular sieve and metallic organic framework molecular sieve.
3. luminescent device as claimed in claim 2, is characterized in that, the diameter of the scattering particles of described multiple hole is 10-500 nanometer.
4. luminescent device as claimed in claim 3, is characterized in that, the diameter of the hole of the scattering particles of described multiple hole is 0.3-100 nanometer.
5. luminescent device as claimed in claim 1, is characterized in that, the containing ratio of the scattering particles of described multiple hole in described light scattering layer is more than or equal to 1%.
6. luminescent device as claimed in claim 1, is characterized in that, the thickness of described light scattering layer is for being more than or equal to 10 nanometers.
7. luminescent device as claimed in claim 1, is characterized in that, the refractive index of described light-diffusing films be more than or equal to described electroluminescence layer refractive index 90%.
8. a display base plate, is characterized in that, comprises the organic electroluminescence device as described in claim 1 to 7 any one.
9. a display of organic electroluminescence, is characterized in that, comprises display base plate as claimed in claim 8.
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| CN104362171A (en) * | 2014-12-03 | 2015-02-18 | 京东方科技集团股份有限公司 | Organic electroluminescence display panel as well as manufacturing method thereof and display device |
| CN106073983A (en) * | 2016-08-26 | 2016-11-09 | 李聪 | Temperature display is defervescence plaster used |
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| CN106328819A (en) * | 2016-08-31 | 2017-01-11 | 深圳市华星光电技术有限公司 | Organic light-emitting display device and manufacturing method thereof |
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| CN104362171A (en) * | 2014-12-03 | 2015-02-18 | 京东方科技集团股份有限公司 | Organic electroluminescence display panel as well as manufacturing method thereof and display device |
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| CN107369782B (en) * | 2017-09-05 | 2023-12-01 | 京东方科技集团股份有限公司 | Substrate, manufacturing method thereof and display device |
| CN109473563A (en) * | 2017-09-08 | 2019-03-15 | 上海和辉光电有限公司 | A kind of OLED luminescent device |
| CN109232864A (en) * | 2018-09-17 | 2019-01-18 | 京东方科技集团股份有限公司 | Polymer, electron injecting layer, OLED device and display device |
| CN109232864B (en) * | 2018-09-17 | 2021-01-22 | 京东方科技集团股份有限公司 | Polymer, electron injection layer, OLED device and display device |
| CN109585685A (en) * | 2018-12-07 | 2019-04-05 | 纳晶科技股份有限公司 | Light takes out structure, its production method and luminescent device |
| CN109585685B (en) * | 2018-12-07 | 2021-06-01 | 纳晶科技股份有限公司 | Light extraction structure, manufacturing method thereof and light emitting device |
| CN113871551A (en) * | 2021-09-26 | 2021-12-31 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
| CN113871551B (en) * | 2021-09-26 | 2022-12-23 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
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