CN107403881A - A kind of scattering film for strengthening oled light and taking out and preparation method thereof - Google Patents
A kind of scattering film for strengthening oled light and taking out and preparation method thereof Download PDFInfo
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- CN107403881A CN107403881A CN201710670388.XA CN201710670388A CN107403881A CN 107403881 A CN107403881 A CN 107403881A CN 201710670388 A CN201710670388 A CN 201710670388A CN 107403881 A CN107403881 A CN 107403881A
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- oled light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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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
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electroluminescent Light Sources (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention provides a kind of scattering film for strengthening oled light and taking out and preparation method thereof, belong to organic luminous semiconductor field.The preparation method, including：The exiting surface of substrate is coated on after film making solution is disperseed and is solidified；Wherein, film making solution count in parts by weight including：0.5~1 part of 10~15 parts of nano particle of high index of refraction scattering, 5~20 parts of solidification glue, 0.05~1 part of dispersant, 0.1~5 part of levelling agent and defoamer.The scattering film as made from this preparation method has good flatness and uniformity, dispersion effect is splendid, the light loss projected from side can be effectively reduced, the light for strengthening OLED takes out effect, the OLED light extraction efficiencies of optics can be improved into more than 50% using this scattering film.
Description
Technical field
The present invention relates to organic luminous semiconductor field, in particular to a kind of scattering film for strengthening oled light and taking out
And preparation method thereof.
Background technology
OLED, i.e. Organic Light Emitting Diode, also known as Organic Electricity laser display, organic luminous semiconductor.OLED shows skill
Art have the advantages that self-luminous, wide viewing angle, almost infinite high contrast, compared with low power consumption, high reaction speed.
At present, OLED is widely used in small-medium size display field, and steps into large-area displays and photograph
The field such as bright.But in OLED lighting fields, because total reflection isotype causes the light loss from side outgoing more, and side
The light of injection concentrates on certain some wave band so that the light ratio sent from front is very low, and spectrum is not complete, and external quantum efficiency is very
It is low, and then make it that light extraction efficiency is low, seriously govern OLED promoting the use of in lighting field.
The content of the invention
The first object of the present invention is to provide a kind of preparation method for strengthening the scattering film that oled light takes out, this scattering
The scattering film flatness that the manufacture craft of film is simple, cost is low and obtained is good, and the light that can significantly increase OLED takes out effect
Should.
The second object of the present invention is to provide a kind of scattering film as made from above-mentioned preparation method, and this scattering film has
Good flatness and dispersion effect, OLED light extraction efficiency can be significantly improved.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
A kind of preparation method for strengthening the scattering film that oled light takes out, it includes：
The exiting surface of substrate is coated on after film making solution is disperseed and is solidified；
Wherein, film making solution count in parts by weight including：
10~15 parts of nano particle of high index of refraction scattering, 5~20 parts of solidification glue, 0.05~1 part of dispersant, levelling agent 0.1
~5 parts and 0.5~1 part of defoamer.
It is a kind of to strengthen the scattering film that oled light takes out as made from above-mentioned preparation method.
Compared with prior art, beneficial effects of the present invention for example including：
Scattering film and preparation method thereof that this enhancing oled light that present disclosure provides takes out, using solidification glue by height
Refractive index scattering nano particle is uniformly coated on the exiting surface of substrate, and one layer of very thin scattering is formed in the exiting surface of substrate
Film, this scattering film have good flatness and uniformity, and dispersion effect is splendid, can effectively reduce the light projected from side
Loss, the light for strengthening OLED take out effect, using this scattering film the OLED light extraction efficiencies of optics can be improved 50% with
On.
Embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.It is unreceipted specific in embodiment
Condition person, the condition suggested according to normal condition or manufacturer are carried out.Agents useful for same or the unreceipted production firm person of instrument, it is
The conventional products that can be obtained by commercially available purchase.
Present embodiment provides a kind of preparation method for strengthening the scattering film that oled light takes out, and it includes：
Step S1, prepare film making solution：Film making solution count in parts by weight including：High index of refraction scattering nano particle 10~
0.5~1 part of 15 parts, 5~20 parts of solidification glue, 0.05~1 part of dispersant, 0.1~5 part of levelling agent and defoamer.
Optionally, film making solution count in parts by weight including：12~15 parts of nano particle of high index of refraction scattering, solidification glue 5
0.5~0.8 part of~15 parts, 0.08~0.15 part of dispersant, 0.2~4 part of levelling agent and defoamer.
Optionally, film making solution count in parts by weight including：13~14 parts of nano particle of high index of refraction scattering, solidification glue 8
0.6~0.7 part of~12 parts, 0.09~0.12 part of dispersant, 1~3 part of levelling agent and defoamer.
Optionally, film making solution count in parts by weight including：High index of refraction scattering 13 parts of nano particle, 10 parts of solidification glue,
0.8 part of 0.1 part of dispersant, 2 parts of levelling agent and defoamer.
Further, high index of refraction scattering nano particle is selected from polystyrene sphere, TiO2、ZrO2And SiO2In at least
It is a kind of.Preferably, high index of refraction scattering nano particle is selected from polystyrene sphere and TiO2.Further, high index of refraction scatters
The particle diameter of nano particle is 1.5~6 μm；Or for 2~5 μm；Or for 3~4 μm；Or for 3.5 μm.This type nano granular is
White or colourless, particle diameter is small, and refractive index is high, and the dispersion effect of scattering film is good made from this type nano granular.
Further, solidification glue is selected from uv-curable glue or heat-curable glue.Uv-curable glue, also known as UV optic-solidified adhesives, it is
A kind of one-component, without solvent, the bonded adhesives and fluid sealant of UV and visible-light curing, there is quick solidifying, consume energy less, solvent-free dirt
The advantages that dye., can be by the way of solidifying under ultraviolet light during subsequent cure using this uv-curable glue, solidification effect
It is good.Heat-curable glue, i.e., there is no accessory substance after this adhesive curing by thermal source come the adhesive that solidifies, such as heat activated blocked polyurethane glue
Produce, bond effect is strong.
Dispersant is added, contributes to high index of refraction to scatter nano particle and disperses in solidification glue, prevent the heavy of nano particle
Drop and cohesion, stable suspension is formed, and then ensure the planarization and the uniformity of finally prepd scattering film.Further,
Dispersant includes PVP, polyethylene glycol, magnesium stearate etc., it is preferred that dispersant is PVP.
Levelling agent is added, helps to reduce the surface tension of film making solution, improves the levelability and uniformity of film making solution,
Film making solution is promoted to form a smooth, smooth, uniform film during drying and forming-film.Further, levelling agent bag
Include any of polyacrylic acid, carboxymethyl cellulose, butyl glycol ether；Preferably, levelling agent is butyl glycol ether.
Defoamer is added, helps to suppress the generation of foam in film making solution, improves the moulding property of film making solution.Further
, defoamer includes any of tributyl phosphate, silicone emulsion, dimethyl silicone polymer；Preferably, defoamer is phosphoric acid
Tributyl.
Further, the film making solution also includes thixotropic agent and thickener, counts in parts by weight, and thixotropic agent is 0.1~5
Part is either 1~4 part or is 2~3 parts；Thickener is 0.2~4 part, is either 0.5~2.5 part or is 1~2 part.
Thixotropic agent is added, can make film making solution that there is high viscosity at low shear, under high shear with low viscosity.Enter one
Step, thixotropic agent is aerosil, polyamide wax, rilanit special or phthalic acid butyl oxide, more preferably, is touched
Into aerosil, aerosil is similar to high index of refraction scattering nano particle function, complementary dimensioned, has one for change agent
Determine also have thixotropic effects while light takes out effect.
Thickener is added, for improving the viscosity of film making solution, can be easy to regulate and control in coating by the amount of thickener
The thickness of scattering film.Further, thickener is ethyl cellulose, methylcellulose, hydroxypropyl methyl cellulose, carboxymethyl fibre
Tie up any one in plain sodium, hydroxyethyl cellulose；Preferably, thickener is ethyl cellulose.
Step S2, film：The exiting surface of substrate is coated on after film making solution is disperseed and is solidified.
Further, film making solution is coated on exiting surface by the way of spraying or spin coating.Using spin coating or spraying
Mode, help to make film making solution uniformly be coated on exiting surface, form planarization and the preferable film layer of the uniformity, and then improve
The light extraction efficiency of obtained scattering film.It is more preferable, it is coated by the way of spraying.
Further, it is solid under ultraviolet light after coating film making solution on exiting surface when solidification glue is uv-curable glue
Change 10~60min.Hardening time is 20~50min；It is either 30~40min or is 35min.
Solidification glue is heat-curable glue, after coating film making solution on exiting surface, is heating and curing at 60~80 DEG C；Heating temperature
Degree is either 65~75 DEG C or is 68~72 DEG C, or is 70 DEG C.Heating-up temperature is less than 80 DEG C, helps to prevent from heating
During substrate is damaged.
The thickness that film making solution coats on exiting surface is 1~10nm, is either 3~7nm or is 4~6nm, or
For 5nm.The good film-forming property of manufactured scattering film in this thickness range, light extraction efficiency are high.
The mode of scattered film making solution can be ultrasonic disperse or be dispersed with stirring that preferable mode is ultrasonic disperse, is entered
One step, ultrasonic time is 15~60min, is either 20~50min or is 30~40min, or is 35min；Supersonic frequency
Rate is 30~40KHz, is either 32~28KHz or is 35KHz.
Further, the material of substrate is glass or PEG plastics.
The preparation method for the scattering film that this enhancing oled light that present embodiment provides takes out, height is rolled over using solidification glue
The exiting surface that rate scattering nano particle is uniformly coated on substrate is penetrated, one layer of very thin scattering film is formed in the exiting surface of substrate,
Manufacture craft is simple, cost is low, and obtained scattering film flatness is good, and the light that can significantly increase OLED takes out effect.
Present embodiment also provides a kind of scattering film for strengthening oled light and taking out, and this scattering film uses above-mentioned technique system
It is standby, there is good flatness and uniformity, dispersion effect is splendid, can effectively reduce the light loss projected from side, enhancing
OLED light takes out effect, the OLED light extraction efficiencies of optics can be improved into more than 50% using this scattering film.
The feature and performance of the present invention are described in further detail with reference to embodiments：
Embodiment 1
The present embodiment provides a kind of scattering film for strengthening oled light and taking out, and its preparation method includes：
A. film making solution is prepared：TiO2Nano particle 13g, uv-curable glue 10g, PVP 0.1g, butyl glycol ether 2g
With tributyl phosphate 0.8g.
B. film-forming process：The film making solution configured is subjected to ultrasonic disperse 30min, film making solution is then sprayed at base
The exiting surface at bottom, solidifies 35min under ultraviolet light, produces scattering film.
Embodiment 2
The present embodiment provides a kind of scattering film for strengthening oled light and taking out, and its preparation method includes：
A. film making solution is prepared：Polystyrene sphere 10g, uv-curable glue 5g, polyethylene glycol 2000 0.05g, carboxymethyl
Cellulose 0.1g and dimethyl silicone polymer 0.5g.
B. film-forming process：The film making solution configured is subjected to ultrasonic disperse 15min, film making solution is then sprayed at base
The exiting surface at bottom, solidifies 60min under ultraviolet light, produces scattering film.
Embodiment 3
The present embodiment provides a kind of scattering film for strengthening oled light and taking out, and its preparation method includes：
A. film making solution is prepared：ZrO2Nano particle 15g, uv-curable glue 20g, magnesium stearate 1g, polyacrylic acid 5g and
Silicone emulsion 1g.
B. film-forming process：The film making solution configured is subjected to ultrasonic disperse 60min, film making solution is then spun on base
The exiting surface at bottom, solidifies 10min under ultraviolet light, produces scattering film.
Embodiment 4
The present embodiment provides a kind of scattering film for strengthening oled light and taking out, and its preparation method includes：
A. film making solution is prepared：SiO2Nano particle 13g, uv-curable glue 10g, PVP 0.1g, butyl glycol ether 2g
With tributyl phosphate 0.8g.
B. film-forming process：The film making solution configured is subjected to ultrasonic disperse 25min, film making solution is then sprayed at base
The exiting surface at bottom, solidifies 50min under ultraviolet light, produces scattering film.
Embodiment 5
The present embodiment provides a kind of scattering film for strengthening oled light and taking out, and its preparation method includes：
A. film making solution is prepared：TiO2Nano particle 13g, heat-curable glue 10g, PVP 0.1g, butyl glycol ether 2g and
Tributyl phosphate 0.8g.
B. film-forming process：The film making solution configured is subjected to ultrasonic disperse 15min, supersonic frequency 40KHz, then will
Film making solution is sprayed at the exiting surface of substrate, is heating and curing at 80 DEG C, produces scattering film.
Embodiment 6
The present embodiment provides a kind of scattering film for strengthening oled light and taking out, and its preparation method includes：
A. film making solution is prepared：TiO2Nano particle 13g, heat-curable glue 10g, PVP 0.1g, butyl glycol ether 2g and
Tributyl phosphate 0.8g.
B. film-forming process：The film making solution configured is subjected to ultrasonic disperse 40min, film making solution is then spun on base
The exiting surface at bottom, the thickness of coating is 10nm, is heating and curing at 60 DEG C, produces scattering film.
Embodiment 7
The present embodiment provides a kind of scattering film for strengthening oled light and taking out, and its preparation method includes：
A. film making solution is prepared：TiO2Nano particle 13g, heat-curable glue 10g, PVP 0.1g, butyl glycol ether 2g, phosphorus
Sour tributyl 0.8g, dioctyl phthalate butyl oxide are 0.1g, ethyl cellulose 0.2.
B. film-forming process：The film making solution configured is subjected to ultrasonic disperse 35min, film making solution is then sprayed at base
The exiting surface at bottom, the thickness of coating is 1nm, is heating and curing at 70 DEG C, produces scattering film.
Embodiment 8
The present embodiment provides a kind of scattering film for strengthening oled light and taking out, and its preparation method includes：
A. film making solution is prepared：TiO2Nano particle 13g, uv-curable glue 10g, PVP 0.1g, butyl glycol ether 2g,
Tributyl phosphate 0.8g, polyamide wax 5g, hydroxypropyl methyl cellulose 4g.
B. film-forming process：The film making solution configured is subjected to ultrasonic disperse 35min, film making solution is then sprayed at base
The exiting surface at bottom, the thickness of coating is 5nm, solidifies 30min under ultraviolet light, produces scattering film.
Experimental example
Verify the light extraction efficiency experiment of scattering film：
First, experimentation：
1. the light extraction efficiency of OLED substrate is tested with optical tester；
2. the preparation method provided using embodiment 1, is coated film making solution in the substrate of step 1, prepares scattering film；With
Increase the light extraction efficiency of the substrate of the OLED after scattering film with same optical tester test afterwards.
2nd, experimental result：
Under same brightness, compare light extraction efficiency of the OLED substrate before and after scattering film is applied, as a result as shown in table 1：
Table 1. sets up the light extraction efficiency of substrate before and after scattering film
As shown in Table 1, before scattering film is set up, substrate is in 600~800cd/m2Brightness under, light extraction efficiency be 2.95~
3.66；And after setting up scattering film, substrate is in 600~800cd/m2Brightness under, light extraction efficiency be 4.55~5.59.Compared to increasing
If before scattering film, under same brightness, the light extraction efficiency set up after scattering film significantly improves.
The efficiency amplification of scattering film is calculated by following formula：
Efficiency amplification=(η-ηo)/ηo× 100%
Wherein, ηoTo set up the light extraction efficiency before scattering film；η is the light extraction efficiency set up after scattering film.
By can be calculated, the amplification of substrate light extraction efficiency under same brightness is 51.09%~54.24%, explanation
In the presence of the scattering film, the light extraction efficiency of substrate is been significantly enhanced.
In addition, the method for preparing the scattering film that other embodiments are provided is used to carry out above-mentioned experiment, experimental result with
Embodiment 1 is similar, does not repeat one by one herein.
Although illustrate and describing the present invention with specific embodiment, but will be appreciated that without departing substantially from the present invention's
Many other change and modification can be made in the case of spirit and scope.It is, therefore, intended that in the following claims
Including belonging to all such changes and modifications in the scope of the invention.
Claims (10)
1. a kind of preparation method for strengthening the scattering film that oled light takes out, it is characterised in that it includes：
The exiting surface of substrate is coated on after film making solution is disperseed and is solidified；
Wherein, the film making solution count in parts by weight including：
10~15 parts of nano particle of high index of refraction scattering, 5~20 parts of solidification glue, 0.05~1 part of dispersant, 0.1~5 part of levelling agent
With 0.5~1 part of defoamer.
2. the preparation method for the scattering film that enhancing oled light according to claim 1 takes out, it is characterised in that the film
Solution also includes the thixotropic agent of 0.1~5 parts by weight.
3. the preparation method for the scattering film that enhancing oled light according to claim 1 takes out, it is characterised in that the thixotroping
Agent is selected from aerosil, polyamide wax, phthalic acid butyl oxide or rilanit special.
4. the preparation method for the scattering film that enhancing oled light according to claim 1 takes out, it is characterised in that the solidification
Glue is selected from uv-curable glue or heat-curable glue.
5. the preparation method for the scattering film that enhancing oled light according to claim 1 takes out, it is characterised in that the high folding
Penetrate rate scattering nano particle and be selected from polystyrene sphere, TiO2、ZrO2And SiO2At least one of.
6. the preparation method for the scattering film that enhancing oled light according to claim 1 takes out, it is characterised in that the high folding
The particle diameter for penetrating rate scattering nano particle is 1.5~6 μm.
7. the preparation method for the scattering film that enhancing oled light according to claim 1 takes out, it is characterised in that using spraying
Or the film making solution is coated on the exiting surface by the mode of spin coating.
8. the preparation method for the scattering film that enhancing oled light according to claim 1 takes out, it is characterised in that the solidification
Glue is uv-curable glue, after the film making solution is coated on the exiting surface, solidifies 10~60min under ultraviolet light.
9. the preparation method for the scattering film that enhancing oled light according to claim 1 takes out, it is characterised in that the film
The thickness that solution coats on the exiting surface is 1~10 μm.
10. strengthen the scattering film that oled light takes out made from a kind of preparation method as described in any one of claim 1~9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710670388.XA CN107403881A (en) | 2017-08-08 | 2017-08-08 | A kind of scattering film for strengthening oled light and taking out and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710670388.XA CN107403881A (en) | 2017-08-08 | 2017-08-08 | A kind of scattering film for strengthening oled light and taking out and preparation method thereof |
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| CN107403881A true CN107403881A (en) | 2017-11-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024146375A1 (en) * | 2023-01-06 | 2024-07-11 | 西安思摩威新材料有限公司 | Light adjusting packaging composition for oled, and packaging film and preparation method therefor |
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| CN105934485A (en) * | 2014-01-24 | 2016-09-07 | 株式会社日本触媒 | Dispersion containing metal oxide particles |
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| CN1695257A (en) * | 2002-09-11 | 2005-11-09 | 通用电气公司 | Diffusion barrier coatings having graded compositions and devices incorporating the same |
| CN103650638A (en) * | 2011-08-11 | 2014-03-19 | 木本股份有限公司 | Scattering film for organic EL and organic EL light emitting device using same |
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Application publication date: 20171128 |