CN103066214A - Organic light-emitting device and preparation method thereof - Google Patents
Organic light-emitting device and preparation method thereof Download PDFInfo
- Publication number
- CN103066214A CN103066214A CN2012105853196A CN201210585319A CN103066214A CN 103066214 A CN103066214 A CN 103066214A CN 2012105853196 A CN2012105853196 A CN 2012105853196A CN 201210585319 A CN201210585319 A CN 201210585319A CN 103066214 A CN103066214 A CN 103066214A
- Authority
- CN
- China
- Prior art keywords
- particle diameter
- scattering particles
- layer
- scattering
- organic electroluminescence
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
The invention relates to an organic light-emitting device and a preparation method thereof, wherein the organic light-emitting device comprises a scatter layer. Materials of the scatter layer comprise, by weight, 10-60 parts of first particle diameter scatter particles, 5-30 parts of second particle diameter scatter particles, 1-60 parts of dispersing agent, and 0-60 parts of photoresist. A particle diameter ratio of the first particle size scatter particles and the second particle size scatter particles is 4: 1-800: 1. The scheme is adopted so as to effectively improve light output efficiency of the organic light-emitting device and effectively improve evenness of a scatter film.
Description
Technical field
The present invention relates to the organic electroluminescence device technical field, be specifically related to a kind of organic electroluminescence device and preparation method thereof.
Background technology
OLED(OrganicLight-Emitting Diode) be Organic Light Emitting Diode, it arranges luminescence unit at substrate, and luminescence unit comprises two electrodes, is provided with the organic electro luminescent material layer between two electrodes.In the prior art, generally select clear glass as substrate, and the refractive index of glass is generally 1.4-1.5, the refractive index of electroluminescent organic material layer is generally 1.7-1.8.Therefore the light that sends of electroluminescent organic material energising, when entering air through glass, because total reflection principle, having most light is confined in the electroluminescent organic material layer, this causes the light output efficiency of OLED device to only have greatly reduction, only have an appointment 20%, have 80% light to be limited to or loss can't rational Application in the inside of the electroluminescent organic material of OLED device.Therefore the light output efficiency that how to improve the OLED device becomes technical staff's research and development focus.
About how improving the light output efficiency of OLED device, existing a lot of documents disclose different technical schemes, a kind of substrate and manufacture method of organic electroluminescence device are disclosed such as existing patent documentation CN102299266A, it comprises transparent substrates, at least one side in transparent substrates has scattering layer, and scattering layer is by TiO
2, SiO
2Or the nano particle of ZnO formation, the inboard of transparent substrates is connected with electrode.The manufacture method of this organic electroluminescence device substrate is, is provided with transparent substrates, forms scattering layer in transparent substrates one side by sol-gel or hydro thermal method, and scattering layer is by TiO
2, SiO
2Or the nano particle of ZnO formation, the inboard of transparent substrates is provided with electrode by deposition.In the technique scheme, by the OLED device substrate that hydro thermal method or sol-gel process are produced,, scattering layer changes the direction of propagation of light by being set, the probability that increase light is propagated forward and the efficient that improves optical coupling, the TiO on the scattering layer
2, SiO
2Or the transparent array of the formation of the nano particle of ZnO flakey, column or tubulose, have higher refractive index, more be conducive to change the round of light, improve the light extraction efficiency of OLED device.
Wherein, it is a kind of method from the growth from solution crystal that hydro thermal method prepares crystal, and its basic principle is that raw material is dissolved in the water equal solvent, takes adequate measures to cause the supersaturation of solution, so that therein forming core and growth of crystal.
And preparing the film material, sol-gel process belongs to a kind of in the wet chemistry method.Generally refer to metallic compound (comprising metal alkoxide and metal inorganic salt) and catalyst, chelating agent and water etc. are made colloidal sol, then by whirl coating, spraying or impregnating method alkoxide sol is coated in masking on the substrate, hydrolysis and polymerization occur behind the moisture in the alkoxide absorbing air, become gradually gel, finally by the process of the processing such as super-dry, sintering.
In technique scheme, just write out the broad method of preparation scattering layer, and do not provided this process that how to prepare scattering layer.And the quality of the film forming of scattering layer will directly have influence on the light extraction efficiency of OLED device.And the factor that affects the scattering layer quality of forming film is a lot, and wherein topmost is exactly that the component of each material of How to choose comes proportioning to be used for the solution of film forming.
For film forming solution, the content of How to choose solute can have preferably evenness and improve light outgoing efficient with the scattering layer that guarantees to prepare, be do not have in the prior art disclosed.The too high meeting of solutes content cause solvent can't film forming or the scattering film surface for preparing the particle out-of-flatness is arranged, have large particle on the scattering film surface, there is the defective of short circuit, poor stability etc. in the OLED device; And solutes content is crossed and low can be caused solvent institute film forming layer not possess the effect of scattering; Therefore the content of how to confirm solute is the emphasis that those skilled in the art study.
For this reason, the applicant has submitted patent application " the OLED preparation method of the preparation method of high index of refraction scattering layer and high light-emitting efficiency " application number on May 31st, 2012: CN201210175471.7, a kind of preparation method of high index of refraction scattering layer is wherein disclosed, comprise the steps: S1, preparation grinding distribution liquid, described grinding distribution liquid comprises: the high index of refraction scattering particles, and its mass percent is: 10%-60%; Dispersant, its quality accounts for the 1%-60% of described high index of refraction scattering particles; Anti-settling agent, its mass percent is: 0-5%; Photoresist, its mass percent is: 0-60%; Organic solvent, its mass percent is: 20%-89.9%; S2, employing filter bores aperture obtain film making solution at the grinding distribution liquid that the described step S1 of the filter paper press filtration of 0.8um-1.2um prepares; The described film making solution of S3, described step S2 preparation prepares the high index of refraction scattering layer through the photoetching spin coating.
Although choose reasonable the mass ratio relation of the mass percent of high index of refraction scattering particles and dispersant and high index of refraction scattering particles so that after the high index of refraction scattering layer that this scheme provides preparation finishes, have preferably evenness and dispersion effect.But the applicant found in the later stage, the scattering layer that utilizes said method to prepare, join at the interface at scattering layer and luminescent layer, because the refractive index ratio of photoresist is lower, so that light beam is when inciding scattering layer from luminescent layer, the total reflection that has at the interface in two-layer handing-over occurs, and a part of light can not be exported, and light output efficiency is high not enough; In addition, adopt the single particle size scattering particles, the evenness of the high index of refraction scattering layer for preparing also can be subject to certain impact.Therefore, in the such scheme, improving the space that can promote in addition aspect two of light output efficiency and the evenness.
Summary of the invention
Technical problem to be solved by this invention is the scattering layer that the preparation method of scattering layer obtains in the prior art, because the refractive index of photoresist is low affect light output efficiency and owing to have the evenness of gap affects scattering film between the high refraction scattering particles particle diameter, be equipped with film making solution with organic electroluminescence device light extraction efficiency and that improve the scattering layer evenness of preparation scattering layer raising OLED device and preparation method thereof thereby provide a kind of by choose reasonable different-grain diameter scattering particles.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of organic electroluminescence device, the scattering layer, the first electrode, organic function layer and the second electrode that comprise substrate and on described substrate, form successively, the material of described scattering layer comprises following component:
The first particle diameter scattering particles: 10-60 weight portion;
The second particle diameter scattering particles: 5-30 weight portion;
Dispersant: 1-60 weight portion;
Photoresist: 0-60 weight portion;
The size ratio of described the first particle diameter scattering particles and described the second particle diameter scattering particles is 4: 1-800: 1.
The particle diameter of described the first particle diameter scattering particles is 200nm-800nm;
The particle diameter of described the second particle diameter scattering particles is 1nm-50nm.
The particle diameter of described the first particle diameter scattering particles is 350nm-450nm;
The particle diameter of described the second particle diameter scattering particles is 15nm-35nm.
Wherein said organic function layer can be selected independent luminescent layer, also can be comprised of luminescent layer and functional layer, functional layer wherein comprises the one or more combination in hole injection layer, electronic barrier layer, hole transmission layer, electron transfer layer, hole blocking layer, the electron injecting layer.
Wherein luminescent layer can be ruddiness, green glow or blue light.The main body RH of ruddiness is Bebq
2(two (10-hydroxy benzo [h] quinoline) beryllium), dyestuff RD are Ir (piq)
2(acac); The main body GH of green glow is CBP(4,4 '-Bis (9H-carbazol-9-yl) biphenyl), dyestuff GD is Ir (ppy)
3Blue light main body BH is AND(9,10-Di (naphtha-2-yl) anthracene), dyestuff BD is DPAVB(4-(di-p-tolylamino)-4 '-[(di-p-tolylamino) styryl] stilbene); Electron transfer layer is Bphen.
The material of described the first particle diameter scattering particles and described the second particle diameter scattering particles can be the same or different, and is selected from respectively TiO
2, ZrO
2, SiO
2, a kind of among SiO, the TiO or several mixture wherein.
The thickness of described scattering layer is 0.3um-3um.
Described dispersant is the titanium white dispersant.
The light transmittance of described photoresist is 80%-99%.
A kind of method for preparing above-mentioned organic electroluminescence device comprises the steps:
S1: with base-plate cleaning, oven dry;
S2: form scattering layer at described substrate;
S3: evaporation forms the first electrode, organic function layer and the second electrode successively on described scattering layer;
S4: apply packaging plastic around the described organic function layer, cap is fastened on the described packaging plastic encapsulates.
The step that forms described scattering layer among the described step S2 is as follows:
S21, preparation grinding distribution liquid: the first particle diameter scattering particles, the second particle diameter scattering particles, dispersant are dissolved in the organic solvent, are ground to particle diameter in the dispersion liquid and account for more than 80% of integral particle quantitative proportion less than the particle of 1 μ m;
S22, employing filter paper aperture obtain film making solution at the described grinding distribution liquid of the filter paper press filtration of 0.8um-1.2um;
S23, described film making solution are spun on through photoetching and obtain described scattering layer on the described substrate.
The step that forms described scattering layer among the described step S2 is as follows:
S2A, preparation grinding distribution liquid: the first particle diameter scattering particles, the second particle diameter scattering particles, dispersant and photoresist are dissolved in the organic solvent, are ground to particle diameter in the dispersion liquid and account for more than 80% of integral particle quantitative proportion less than the particle of 1 μ m;
S2B, employing filter paper aperture obtain film making solution at the described grinding distribution liquid of the filter paper press filtration of 0.8um-1.2um;
S2C, described film making solution are spun on through photoetching and obtain described scattering layer on the described substrate.
The step that forms described scattering layer among the described step S2 is as follows:
S2a, preparation grinding distribution liquid: the first particle diameter scattering particles, the second particle diameter scattering particles, dispersant are dissolved in the organic solvent, are ground to particle diameter in the dispersion liquid and account for more than 80% of integral particle quantitative proportion less than the particle of 1 μ m;
S2b, employing filter paper aperture obtain prefabricated solution at the described grinding distribution liquid of the filter paper press filtration of 0.8um-1.2um;
S2c, in described prefabricated solution, add and obtain film making solution after photoresist mixes;
S2d, described film making solution are spun on through photoetching and obtain described scattering layer on the described substrate.
Described filter paper aperture is 0.8um.
Before described step S4, also comprise the steps:
A1: be etched away when encapsulating and the described scattering layer of described packaging plastic corresponding region.
Before described step S4, also comprise the steps:
A2: the described scattering layer outside when being etched away encapsulation and described packaging plastic corresponding region reaches.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) organic electroluminescence device of the present invention, scattering layer wherein has the first particle diameter scattering particles and the second particle diameter scattering particles, and the first particle diameter is different with the second particle diameter, the two varies, and the size ratio of the first particle diameter scattering particles and the second particle diameter scattering particles is 4: 1-800: 1.When having the space between the first particle diameter scattering particles, just can fill the space by the second particle diameter scattering particles like this, can improve thus the evenness of scattering film.And, among photoresist, be doped with after the second scattering particles, can improve the refractive index on scattering film surface, so that light is when inciding on the scattering layer from luminescent layer, not only can carry out scattering to light by the first particle diameter scattering particles, can also reduce by the scattering film surface after the raising refractive index probability of light generation total reflection, the two combines light output efficiency is effectively improved.
(2) organic electroluminescence device of the present invention, select the scattering particles of the first particle diameter scattering particles 200nm-800nm and the scattering particles of the second particle diameter scattering particles 1nm-50nm, the second particle diameter is when 1nm-50nm, cooperate the refractive index of the rear scattering film that forms to improve a lot with photoresist, and first particle diameter be four times of the second particle diameter at least, the second particle diameter can play the effect in better filling space.
(3) in the method that is prepared with organic electroluminescence devices of the present invention, when the preparation scattering layer, can select to add photoresist so that the scattering layer for preparing has better evenness, and when filtering, lose most photoresist in order to prevent, can select just the first particle diameter scattering particles of elder generation, the second particle diameter scattering particles, dispersant is dissolved in and is ground to particle diameter in the dispersion liquid in the organic solvent and accounts for more than 80% of integral particle quantitative proportion less than the particle of 1 μ m, be mixed to get film making solution through adding again photoresist behind the Filter paper filtering, adopt such step can avoid the loss of photoresist.
(4) method that is prepared with organic electroluminescence devices that provides among the present invention, owing to be etched away scattering layer corresponding to packaging plastic, can be so that the OLED device after the encapsulation has better sealing property, because might entering the OLED device inside through scattering layer, extraneous air and moisture cause luminous organic material suction in the OLED device to be lost efficacy or oxidized, therefore if can be etched away by the scattering layer that packaging plastic is corresponding during encapsulation, can prevent effectively that luminous organic material suction in the OLED device was lost efficacy or oxidized.
Description of drawings
For content of the present invention is more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the OLED device-side view that the embodiment of the invention 1 contains scattering layer;
Fig. 2 is the OLED device-side view outside the embodiment of the invention 4 etchings removal packaging plastic corresponding region reaches.
Fig. 3 is the OLED device-side view that the embodiment of the invention 5 etchings are removed encapsulation corresponding region scattering layer;
Wherein Reference numeral is: 1-substrate, 2-scattering layer, 3-the first electrode, 4-organic function layer, 5-the second electrode, 6-packaging plastic, 7-cap.
Embodiment
Present embodiment provides a kind of organic electroluminescence device, the scattering layer 2, the first electrode 3, organic function layer 4 and the second electrode 5 that comprise substrate 1 and on described substrate 1, form successively, described scattering layer 2 is prepared from by following component: the first particle diameter scattering particles: 18 weight portions; The second particle diameter scattering particles: 9 weight portions; Dispersant: 8 weight portions; Photoresist: 60 weight portions; The size ratio of described the first particle diameter scattering particles and the second particle diameter scattering particles is 20:1.
A kind of method for preparing above-mentioned organic electroluminescence device is provided in the present embodiment, comprises the steps:
S1: substrate 1 is cleaned, dries;
S2: form scattering layer 2 at described substrate 1;
S3: evaporation forms the first electrode 3, organic function layer 4 and the second electrode 5 successively on described scattering layer 2;
Utilize vapour deposition method to prepare the first electrode layer of ITO; Etch the first electrode 3 at described the first electrode layer; The ITO target is indium stannum alloy, its composition ratio In:Sn=90%:10%.Partial pressure of oxygen is 0.4Sccm in the preparation process, and argon partial pressure is 20Sccm;
Process at described the first electrode 3 preparation organic function layers 4 is as follows: successively evaporation hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer on described the first electrode 3; Evaporate process middle chamber pressure is lower than 5.0 * 10
-3Pa, at first the thick NPB of evaporation 40nm is as hole transmission layer; The ADN that the method evaporation 30nm that steams altogether with double source is thick and TBPe are as luminescent layer, and the ratio of through-rate control TBPe in ADN is 7%; The Alq3 of evaporation 20nm is as electron transfer layer; The LiF of evaporation 0.5nm is as electron injecting layer; The Al of evaporation 150nm is as the second electrode 5 on described organic function layer 4;
S4: around described organic function layer 4, apply packaging plastic 6, cap 7 is fastened on the described packaging plastic 6 encapsulates.
Wherein, when the described dispersion layer 2 of preparation, adopt following steps:
S1, preparation grinding distribution liquid: with the first particle diameter scattering particles TiO
2, the second particle diameter scattering particles TiO
2, titanium white dispersant, photoresist be dissolved in the organic solvent and ground 3 hours, so that particle diameter accounts for more than 80% of integral particle quantitative proportion less than the particle of 1 μ m.
In the present embodiment, described the first particle diameter scattering particles and described the second particle diameter scattering particles all are chosen as TiO
2, described the first particle diameter scattering particles 400nm, its weight is chosen as 15g, accounts for 18 weight portions; Described the second particle diameter scattering particles 20nm, its weight is chosen as 7.5g, and it accounts for 9 weight portions; Described titanium white dispersant is used for disperseing described the first particle diameter scattering particles and described the second particle diameter scattering particles, such as afcma-4010, disperbyk-110, disperbyk-180, disperbyk-163, dispers655, the dispers628 etc. that can select Bi Ke chemistry Co., Ltd to produce, its weight is chosen as 1.2g, and it accounts for 8 weight portions; Described organic solvent is selected 1-Methoxy-2-propyl acetate, and its weight is chosen as 60g;
The above-mentioned solution for preparing is put into grinding pot, fix grinding pot and grind post, add 90ml zirconium pearl (annotate: the amount of zirconium pearl is decided on the volume of grinding pot), grind and use gauze elimination zirconium pearl after 3 hours, make described grinding distribution liquid;
As organic solvent, so long as can dissolve above-mentioned material and the solvent that do not react with above-mentioned material choice for use suitably.Therefore except 1-Methoxy-2-propyl acetate, can also select:
The alcohols such as methyl alcohol, ethanol, benzyl alcohol;
(gathering) alkane glycol monoalkyl ethers such as glycol monoethyl ether, ethylene glycol monoethyl ether, ethylene glycol propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diglycol monotertiary n-butyl ether, triethylene glycol monomethyl ether, triethylene glycol list ether, propylene glycol monomethyl ether, dihydroxypropane single-ether, dipropylene glycol monomethyl ether, DPE, DPG list positive propyl ether, DPG mono-n-butyl ether, Tripropylene glycol monomethyl Ether, tripropylene glycol list ether;
(gathering) alkane glycol monoalkyl acetate esters such as ethylene glycol monomethyl ether acetate, ethylene glycol monoethylether acetate, ethylene glycol propyl ether acetic acid esters, ethylene glycol mono-n-butyl ether acetic acid esters, diethylene glycol monomethyl ether acetic acid esters, diethylene glycol monoethyl ether acetic acid esters, diglycol monotertiary positive propyl ether acetic acid esters, diglycol monotertiary n-butyl ether acetic acid esters, the third diethylene glycol monomethyl ether acetic acid esters, propylene glycol monoethyl ether acetate, 3-methoxyl group butylacetic acid ester;
Other ethers such as diethylene glycol dimethyl ether, diethylene glycol (DEG) methyl ethyl ether, diethyl carbitol, oxolane;
Methyl ethyl ketone, cyclohexanone, 2-HEPTANONE, 3-heptanone, diacetone alcohol (4-hydroxy-4-methyl penta-2-ketone), 4-hydroxy-4-methyl oneself-ketones such as 2-ketone;
Propylene-glycol diacetate, 1,3-BDO diacetate esters, 1, the diacetate esters classes such as 6-hexylene glycol diacetate esters;
The lactic acid alkyl ester such as methyl lactate, ethyl lactate class;
Ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, isobutyl acetate, formic acid n-pentyl ester, acetic acid isopentyl ester, 3-methoxyl group butylacetic acid ester, 3-methyl-3-methoxyl group butylacetic acid ester, n-butyl propionate, 3-methyl-3-methoxyl group butyl propionic ester, ethyl butyrate, propyl butyrate, isopropyl isobutyrate, the positive butyl ester of butyric acid, hydroxyl ethyl acetate, ethoxy ethyl acetate, the 3-methoxy methyl propionate, 3-methoxy propyl acetoacetic ester, 3-ethoxy-propionic acid methyl esters, the 3-ethoxyl ethyl propionate, methyl pyruvate, ethyl pyruvate, the pyruvic acid n-propyl, methyl acetoacetate, ethyl acetoacetate, 2-hydroxy-2-methyl ethyl propionate, 2-hydroxy-3-methyl methyl butyrate, 2-supports for other ester classes such as ethyl butyrates;
Toluene, dimethylbenzene etc. are aromatic hydrocarbon based;
The amide-types such as 1-METHYLPYRROLIDONE, DMF, DMA;
In these solvents, from dissolubility, pigment-dispersing, the coating equal angles is set out, preferred benzyl alcohol, ethylene glycol mono-n-butyl ether, propylene glycol monomethyl ether, dihydroxypropane single-ether, ethylene glycol monomethyl ether acetate, the ethylene glycol mono-n-butyl ether acetic acid esters, diglycol monotertiary n-butyl ether acetic acid esters, propylene glycol methyl ether acetate, propylene glycol monoethyl ether acetate, diethylene glycol dimethyl ether, the diethylene glycol (DEG) methyl ethyl ether, cyclohexanone, 2-HEPTANONE, the 3-heptanone, propylene-glycol diacetate, the 1,3-BDO diacetate esters, n-butyl acetate, isobutyl acetate, the formic acid n-pentyl ester, isoamyl acetate, 3-methoxyl group butylacetic acid ester, n-buty formate, ethyl butyrate, isopropyl isobutyrate, the positive butyl ester of butyric acid, 3-methoxy propyl acetoacetic ester, 3-ethoxy-propionic acid methyl esters, the 3-ethoxyl ethyl propionate, 3-methyl-3-methoxyl group butyl propionic ester, ethyl pyruvate etc.
Above-mentioned solvent can use in independent or two or more mixing.
In addition, can also be used in conjunction the high boiling solvents such as benzylisoeugenol, di-n-hexyl ether, acetonyl acetone, isophorone, caproic acid, sad, 1-octanol, 1 nonyl alcohol, benzyl acetate, ethyl benzoate, diethy-aceto oxalate, diethyl maleate, gamma-butyrolacton, ethylene carbonate, propylene carbonate, glycol monomethyl phenyl ether acetic acid esters with above-mentioned solvent.Above-mentioned high boiling solvent can use in independent or two or more mixing.
S2, employing filter bores aperture obtain film making solution at the described grinding distribution liquid of the filter paper press filtration of 0.8um;
S3, described film making solution prepare the 2um scattering layer through the photoetching spin coating.
Adopt the OLED device of preparation method's preparation in the present embodiment, its structure as shown in Figure 1.
Present embodiment is done following improvement on the basis of embodiment 1, and in the present embodiment, when preparing described scattering layer 2, described the first particle diameter scattering particles are chosen as ZrO
2, its particle diameter is 800nm, accounts for 10 weight portions; Described the second particle diameter scattering particles are chosen as ZrO
2, its particle diameter is 50nm, accounts for 30 weight portions; The titanium white dispersant accounts for 20 weight portions;
1-Methoxy-2-propyl acetate is as organic solvent, and weight is chosen as 70g;
The thickness of described scattering layer is 0.3um in the present embodiment.
Present embodiment is done following improvement on the basis of embodiment 1, and the method for the described scattering layer 2 of the preparation that present embodiment provides comprises the steps:
S2A: selecting described the first particle diameter scattering particles is SiO
2, its particle diameter is 200nm, accounts for 60 weight portions; Described the second particle diameter scattering particles are chosen as SiO
2, its particle diameter is 1nm, accounts for 5 weight portions; Described titanium white dispersant is: 60 weight portions;
Selecting photoresist is the ZEOCOAT photoresist, and 50 weight portions, the light transmittance of described photoresist are 80%;
Described organic solvent is selected 1-Methoxy-2-propyl acetate, and weight is chosen as 50g;
S2B, employing filter bores aperture obtain film making solution at the described grinding distribution liquid of the filter paper press filtration of 0.9um;
S2C, described film making solution are spun on through photoetching and obtain described scattering layer 2 on the described substrate 1.
The thickness of described scattering layer is 3um in the present embodiment.
Embodiment 4
Present embodiment is done following improvement on the basis of embodiment 1, and the preparation method of the described scattering layer 2 that present embodiment provides comprises the steps:
S2A: described the first particle diameter scattering particles are selected SiO, and its particle diameter is 350nm, accounts for 30 weight portions; Described the second particle diameter scattering particles are selected SiO, and its particle diameter is 15nm, accounts for 20 weight portions;
Described titanium white dispersant is: 1 weight portion;
Described photoresist is transparent OC glue, and 60 weight portions, the light transmittance of described photoresist are 99%
Described organic solvent is selected 2-hydroxy-3-methyl methyl butyrate, and weight is chosen as 60g;
S2B: adopt the filter bores aperture at the described grinding distribution liquid of the filter paper press filtration of 1.2um, obtain film making solution;
S2C: described film making solution is spun on through photoetching and obtains described scattering layer 2 on the described substrate 1, and the thickness of described scattering layer 2 is 2.5um in the present embodiment.
The method that is prepared with organic electroluminescence devices in the present embodiment is done following improvement on the basis of embodiment 1, described scattering layer 2 outside when also comprising the steps: to be etched away encapsulation before described step S4 and described packaging plastic 6 corresponding regions reach, the zone of the described scattering layer 2 that wherein is etched away is greater than packaging area 2mm, as shown in Figure 2.
Owing to be etched away scattering layer corresponding to packaging plastic, can be so that the OLED device after the encapsulation has better sealing property, because might entering the OLED device inside through scattering layer, extraneous air and moisture cause luminous organic material suction in the OLED device to be lost efficacy or oxidized, therefore if can be etched away by the scattering layer that packaging plastic is corresponding during encapsulation, can prevent effectively that luminous organic material suction in the OLED device was lost efficacy or oxidized.
Embodiment 5
Present embodiment is done following improvement on the basis of embodiment 1, and the method for the described scattering layer 2 of the preparation in the present embodiment adopts following steps:
S2A: described the first particle diameter scattering particles are selected TiO, and its particle diameter is 600nm, accounts for 45 weight portions; Described the second particle diameter scattering particles are selected TiO, and its particle diameter is 35nm, accounts for 25 weight portions;
Described titanium white dispersant is 35 weight portions;
Described photoresist is auspicious red RZJ304, and 10 weight portions, the light transmittance of described photoresist are 85%;
3-methoxy propyl acetoacetic ester is as organic solvent, and weight is chosen as 80g;
S2B: adopt the filter bores aperture at the described grinding distribution liquid of the filter paper press filtration of 1.2um, obtain film making solution;
S2C: described film making solution is spun on through photoetching and prepares described scattering layer 2 on the described substrate 1.
Be prepared with the method for organic electroluminescence devices in the present embodiment, different with embodiment 4, it is before described step S4, described scattering layer 2 outside when being etched away encapsulation and described packaging plastic 6 corresponding regions reach adopts its structure of OLED device of preparation method's preparation in the present embodiment as shown in Figure 3.
Present embodiment is done following improvement on the basis of embodiment 1, and the method for the described scattering layer 2 of preparation comprises the steps: in the present embodiment
S2A: described the first particle diameter scattering particles are selected TiO
2, its particle diameter is 450nm, accounts for 20 weight portions; Described the second particle diameter scattering particles ZrO
2, its particle diameter is 25nm, accounts for 15 weight portions;
The titanium white dispersant is 5 weight portions;
Photoresist is selected ZEOCOAT, and 40 weight portions, the light transmittance of described photoresist are 95%;
1-Methoxy-2-propyl acetate is as organic solvent, and weight is chosen as 60g;
S2B: adopt the filter bores aperture at the described grinding distribution liquid of the filter paper press filtration of 1.0um, obtain film making solution;
S2C: described film making solution is spun on through photoetching and prepares described scattering layer 2 on the described substrate 1.
The method that is prepared with organic electroluminescence devices in the present embodiment is identical with embodiment 4.
In the above-described embodiments, described the first particle diameter scattering particles and described the second particle diameter scattering particles all are selected from TiO
2, ZrO
2, SiO
2, a kind of among SiO, the TiO; And described dispersant can be selected conventional titanium white dispersant, and described titanium white dispersant can select to be applicable to disperse all dispersants of described the first particle diameter scattering particles and described the second particle diameter scattering particles; Such as: afcma-4010, disperbyk-110, disperbyk-180, disperbyk-163, dispers655, dispers628 etc. that Bi Ke chemistry Co., Ltd produces; And described photoresist mainly be as the low-refraction host doped in film making solution, in above-described embodiment photoresist EOC130 available from Yongguang Chemical Industry Co., Ltd., Taiwan, transparent OC glue available from DNP fine chemistry industry, ZEOCOAT available from the auspicious father-in-law of Japan (Zeon) electronic material company, auspicious red RZJ304 available from Suzhou Ruihong Electronic Chemical Product Co., Ltd..Can substitute photoresist of the present invention at other photoresists that can buy on the market, but its translucent effect may there be the translucent effect of the selected photoresist of the present invention good.
Embodiment 7
Different with above-described embodiment in the present embodiment, wherein prepare the preparation method of described scattering layer 2, adopt following steps:
S2a: selecting described the first particle diameter scattering particles is TiO
2, its particle diameter is 450nm, accounts for 20 weight portions; Selecting described the second particle diameter scattering particles is ZrO
2, its particle diameter is 5nm, accounts for 15 weight portions;
The titanium white dispersant is 5 weight portions;
1-Methoxy-2-propyl acetate is as organic solvent, and weight is chosen as 60g;
S2b: adopt the filter bores aperture at the described grinding distribution liquid of the filter paper press filtration of 1.0um, obtain prefabricated solution;
S2c: obtain film making solution after the photoresist of adding 30 weight portions mixes in described prefabricated solution; Can directly photoresist be joined in this step in the prefabricated solution to stir and obtain film making solution, also photoresist can be joined to be placed in the prefabricated solution to stir in the ultrasonic environment and obtain film making solution;
S2d: described film making solution is spun on the described substrate 1 through photoetching and prepares scattering layer.
The method that is prepared with organic electroluminescence devices in the present embodiment is identical with embodiment 4.
As optional execution mode, can also on the basis of embodiment 1 to embodiment 6 arbitrary embodiment, make following change, other each layers are all constant in the described organic electroluminescence device, are that described organic function layer 4 can be made following change:
Described organic function layer 4 can be selected independent luminescent layer;
Described organic function layer 4 also can be comprised of luminescent layer and functional layer, and functional layer wherein comprises the one or more combination in hole injection layer, electronic barrier layer, hole transmission layer, electron transfer layer, hole blocking layer, the electron injecting layer.
Wherein luminescent layer can be ruddiness, green glow or blue light.The main body RH of ruddiness is Bebq
2(two (10-hydroxy benzo [h] quinoline) beryllium), dyestuff RD are Ir (piq)
2(acac); The main body GH of green glow is CBP(4,4 '-Bis (9H-carbazol-9-yl) biphenyl), dyestuff GD is Ir (ppy)
3Blue light main body BH is AND(9,10-Di (naphtha-2-yl) anthracene), dyestuff BD is DPAVB(4-(di-p-tolylamino)-4 '-[(di-p-tolylamino) styryl] stilbene); Electron transfer layer is Bphen.
Comparative Examples 1-2:
The scattering particles of scattering layer described in the Comparative Examples 1-2 2 adopt respectively the first particle diameter scattering particles among embodiment 1 and the embodiment 2, and remainder is with embodiment 1 and embodiment 2;
Comparative Examples 3-4:
The scattering particles of scattering layer described in the Comparative Examples 3-4 2 adopt respectively the second particle diameter scattering particles among embodiment 1 and the embodiment 2, and remainder is with embodiment 1 and embodiment 2.
For the light extraction efficiency of the organic electroluminescence device for preparing, above-mentioned Comparative Examples and each embodiment are tested, set in the identical situation of its current density, be 10mA, compare its luminosity and evenness, comparative result is as follows:
Obviously, all in the identical situation, the scattering layer that the different-grain diameter scattering particles that adopt the embodiment of the present application to provide prepare is applied in the OLED device, can effectively improve the evenness of light extraction efficiency and the scattering layer of OLED device at additive method and material.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And the apparent variation of being extended out thus or change still are among the protection range of the invention.
Claims (14)
1. organic electroluminescence device, the scattering layer (2), the first electrode (3), organic function layer (4) and the second electrode (5) that comprise substrate (1) and on described substrate (1), form successively, it is characterized in that: the material of described scattering layer (2) comprises following component:
The first particle diameter scattering particles: 10-60 weight portion;
The second particle diameter scattering particles: 5-30 weight portion;
Dispersant: 1-60 weight portion;
Photoresist: 0-60 weight portion;
The size ratio of described the first particle diameter scattering particles and described the second particle diameter scattering particles is 4: 1-800: 1.
2. organic electroluminescence device according to claim 1 is characterized in that:
The particle diameter of described the first particle diameter scattering particles is 200nm-800nm;
The particle diameter of described the second particle diameter scattering particles is 1nm-50nm.
3. organic electroluminescence device according to claim 2 is characterized in that:
The particle diameter of described the first particle diameter scattering particles is 350nm-450nm;
The particle diameter of described the second particle diameter scattering particles is 15nm-35nm.
4. arbitrary described organic electroluminescence device according to claim 1-3 is characterized in that:
The material of described the first particle diameter scattering particles and described the second particle diameter scattering particles can be the same or different, and is selected from respectively TiO
2, ZrO
2, SiO
2, a kind of among SiO, the TiO or several mixture wherein.
5. arbitrary described organic electroluminescence device according to claim 1-4 is characterized in that:
The thickness of described scattering layer (2) is 0.3um-3um.
6. arbitrary described organic electroluminescence device according to claim 1-5 is characterized in that:
Described dispersant is the titanium white dispersant.
7. arbitrary described organic electroluminescence device according to claim 1-6 is characterized in that:
The light transmittance of described photoresist is 80%-99%.
8. a method for preparing the arbitrary described organic electroluminescence device of claim 1-7 is characterized in that, comprises the steps:
S1: substrate (1) is cleaned, dries;
S2: form scattering layer (2) at described substrate (1);
S3: evaporation forms the first electrode (3), organic function layer (4) and the second electrode (5) successively on described scattering layer (2);
S4: apply packaging plastic (6) on every side at described organic function layer (4), cap (7) is fastened on the described packaging plastic (6) encapsulates.
9. the described method that is prepared with organic electroluminescence devices according to claim 8 is characterized in that, the step that forms described scattering layer (2) among the described step S2 is as follows:
S21: preparation grinding distribution liquid: the first particle diameter scattering particles, the second particle diameter scattering particles, dispersant are dissolved in the organic solvent, are ground to particle diameter in the dispersion liquid and account for more than 80% of integral particle quantitative proportion less than the particle of 1 μ m;
S22: adopt the filter paper aperture at the described grinding distribution liquid of the filter paper press filtration of 0.8um-1.2um, obtain film making solution;
S23: described film making solution is spun on through photoetching and obtains described scattering layer (2) on the described substrate (1).
10. the described method that is prepared with organic electroluminescence devices according to claim 8 is characterized in that, the step that forms described scattering layer (2) among the described step S2 is as follows:
S2A: preparation grinding distribution liquid: the first particle diameter scattering particles, the second particle diameter scattering particles, dispersant and photoresist are dissolved in the organic solvent, are ground to particle diameter in the dispersion liquid and account for more than 80% of integral particle quantitative proportion less than the particle of 1 μ m;
S2B: adopt the filter paper aperture at the described grinding distribution liquid of the filter paper press filtration of 0.8um-1.2um, obtain film making solution;
S2C: described film making solution is spun on through photoetching and obtains described scattering layer (2) on the described substrate (1).
11. the described method that is prepared with organic electroluminescence devices is characterized in that according to claim 8, the step that forms described scattering layer (2) among the described step S2 is as follows:
S2a: preparation grinding distribution liquid: the first particle diameter scattering particles, the second particle diameter scattering particles, dispersant are dissolved in the organic solvent, are ground to particle diameter in the dispersion liquid and account for more than 80% of integral particle quantitative proportion less than the particle of 1 μ m;
S2b: adopt the filter paper aperture at the described grinding distribution liquid of the filter paper press filtration of 0.8um-1.2um, obtain prefabricated solution;
S2c: obtain film making solution after in described prefabricated solution, adding the photoresist mixing;
S2d: described film making solution is spun on through photoetching and obtains described scattering layer (2) on the described substrate (1).
12. arbitrary described method that is prepared with organic electroluminescence devices according to claim 9-11 is characterized in that:
Described filter paper aperture is 0.8um.
13. arbitrary described method that is prepared with organic electroluminescence devices according to claim 8-12 is characterized in that:
Before described step S4, also comprise the steps:
A1: be etched away when encapsulating and the described scattering layer (2) of described packaging plastic (6) corresponding region.
14. arbitrary described method that is prepared with organic electroluminescence devices according to claim 8-12 is characterized in that:
Before described step S4, also comprise the steps:
A2: the described scattering layer (2) outside when being etched away encapsulation and described packaging plastic (6) corresponding region reaches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585319.6A CN103066214B (en) | 2012-12-28 | 2012-12-28 | A kind of organic electroluminescence device and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585319.6A CN103066214B (en) | 2012-12-28 | 2012-12-28 | A kind of organic electroluminescence device and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103066214A true CN103066214A (en) | 2013-04-24 |
| CN103066214B CN103066214B (en) | 2016-06-29 |
Family
ID=48108748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210585319.6A Active CN103066214B (en) | 2012-12-28 | 2012-12-28 | A kind of organic electroluminescence device and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103066214B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972423A (en) * | 2014-05-08 | 2014-08-06 | 京东方科技集团股份有限公司 | OLED light-emitting device, manufacturing method thereof and display device |
| CN105789475A (en) * | 2014-12-24 | 2016-07-20 | 固安翌光科技有限公司 | Organic light-emitting device and preparation method thereof |
| CN108957856A (en) * | 2018-07-31 | 2018-12-07 | 固安翌光科技有限公司 | With fingerprint recognition liquid crystal display body |
| WO2020244212A1 (en) * | 2019-06-04 | 2020-12-10 | Tcl华星光电技术有限公司 | Display panel and manufacturing method therefor |
| WO2021121344A1 (en) * | 2019-12-18 | 2021-06-24 | 固安翌光科技有限公司 | Organic electroluminescent device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070114523A1 (en) * | 2005-11-18 | 2007-05-24 | Manabu Oumi | Electroluminescence element and display device using the same |
| CN101901825A (en) * | 2009-03-05 | 2010-12-01 | 富士胶片株式会社 | Organic electroluminescence device |
| CN102709489A (en) * | 2012-05-31 | 2012-10-03 | 昆山维信诺显示技术有限公司 | Preparation method for high-refractivity scattering layer and preparation method for organic light-emitting diode (OLED) with high luminous efficiency |
-
2012
- 2012-12-28 CN CN201210585319.6A patent/CN103066214B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070114523A1 (en) * | 2005-11-18 | 2007-05-24 | Manabu Oumi | Electroluminescence element and display device using the same |
| CN101901825A (en) * | 2009-03-05 | 2010-12-01 | 富士胶片株式会社 | Organic electroluminescence device |
| CN102709489A (en) * | 2012-05-31 | 2012-10-03 | 昆山维信诺显示技术有限公司 | Preparation method for high-refractivity scattering layer and preparation method for organic light-emitting diode (OLED) with high luminous efficiency |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972423A (en) * | 2014-05-08 | 2014-08-06 | 京东方科技集团股份有限公司 | OLED light-emitting device, manufacturing method thereof and display device |
| WO2015169023A1 (en) * | 2014-05-08 | 2015-11-12 | 京东方科技集团股份有限公司 | Oled light-emitting device, preparation method therefor and display device |
| US9543539B2 (en) | 2014-05-08 | 2017-01-10 | Boe Technology Group Co., Ltd. | OLED device and manufacturing method thereof and display apparatus |
| CN105789475A (en) * | 2014-12-24 | 2016-07-20 | 固安翌光科技有限公司 | Organic light-emitting device and preparation method thereof |
| CN108957856A (en) * | 2018-07-31 | 2018-12-07 | 固安翌光科技有限公司 | With fingerprint recognition liquid crystal display body |
| WO2020244212A1 (en) * | 2019-06-04 | 2020-12-10 | Tcl华星光电技术有限公司 | Display panel and manufacturing method therefor |
| WO2021121344A1 (en) * | 2019-12-18 | 2021-06-24 | 固安翌光科技有限公司 | Organic electroluminescent device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103066214B (en) | 2016-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102709489B (en) | The preparation method of high index of refraction scattering layer and the OLED preparation method of high light-emitting efficiency | |
| CN103066214B (en) | A kind of organic electroluminescence device and preparation method thereof | |
| KR101920857B1 (en) | Optoelectronic component and method for producing an optoelectronic component | |
| CN104364928A (en) | Layered structure for oled device, method for manufacturing the same, and oled device having the same | |
| CN102569667B (en) | Electroluminescent device with high efficiency luminescence | |
| CN103531720A (en) | Electroluminescent device with high light emitting efficiency | |
| CN102736145A (en) | Brightness enhancement film and preparation method thereof, and device using brightness enhancement film | |
| CN103700783B (en) | The optical grating construction taken out for oled light | |
| CN102751443B (en) | Organnic electroluminescent device and preparation method thereof | |
| KR20140115507A (en) | Light extraction layer, light emitting device having the same and method of fabricating the same | |
| CN103972420A (en) | Organic light-emitting device and method for manufacturing same | |
| CN101814587A (en) | Method for improving coupling luminous efficiency of flat plate luminescent device | |
| CN109585685A (en) | Light takes out structure, its production method and luminescent device | |
| CN104347801A (en) | Organic electroluminescence appliance and preparing method of organic electroluminescence appliance | |
| CN104124396A (en) | Organic electroluminescent device and preparation method thereof | |
| CN103700777A (en) | Organic electroluminescent device and preparation method thereof | |
| CN103972408A (en) | Organic light-emitting device and method for manufacturing same | |
| CN103682128A (en) | Organic light-emitting device and preparation method thereof | |
| CN103682135A (en) | Organic electroluminescence device and preparation method thereof | |
| CN104425725A (en) | Organic electroluminescent device and preparation method thereof | |
| CN103682127A (en) | Organic light-emitting device and preparation method thereof | |
| CN105405984B (en) | A kind of electrode and preparation method and application | |
| CN104518140A (en) | Organic electroluminescent device and preparation method thereof | |
| CN104124380A (en) | Organic electroluminescent device and preparation method thereof | |
| CN103682126A (en) | Organic light-emitting device and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160128 Address after: 065500 Guan County, Hebei Province emerging industry demonstration park Applicant after: GU'AN YEOLIGHT TECHNOLOGY CO., LTD. Applicant after: Tsinghua University Address before: 215300 Suzhou Province, Kunshan City, Kunshan hi tech Zone, Feng Feng Road, No. 188, No. Applicant before: Weixinnuo Display Tech Co., Ltd. Applicant before: Tsinghua University Applicant before: Weixinnuo Science and Technology Co., Ltd., Beijing |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |