Preparation method for high-refractivity scattering layer and preparation method for organic light-emitting diode (OLED) with high luminous efficiency

A technology of high refractive index and scattering layer, which is applied in the manufacture of semiconductor/solid-state devices, electrical components, electric solid-state devices, etc., can solve the problem of poor surface flatness of the scattering film layer, the lack of scattering effect of the film layer, and particles in the scattering film Unevenness and other problems, to achieve good flatness, improved light extraction efficiency, and uniform film-making solution

Active Publication Date: 2012-10-03
GUAN YEOLIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive solute content will cause the solvent to fail to form a film or the surface of the prepared scattering film will have uneven particles, large particles will exist on the surface of the scattering film, and the OLED device will have defects such as short circuit and poor stability; while the solute content will be too low. The formed film layer does not have the effect of scattering; therefore how to determine the content of solute is the focus of research by those skilled in the art
[0008] In addition, sinc

Method used

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  • Preparation method for high-refractivity scattering layer and preparation method for organic light-emitting diode (OLED) with high luminous efficiency
  • Preparation method for high-refractivity scattering layer and preparation method for organic light-emitting diode (OLED) with high luminous efficiency
  • Preparation method for high-refractivity scattering layer and preparation method for organic light-emitting diode (OLED) with high luminous efficiency

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] Example 1

[0046] This embodiment provides a method for preparing a high refractive index scattering layer, which includes the following steps:

[0047] S1. Preparation of a grinding dispersion, the grinding dispersion comprising:

[0048] High refractive index scattering particles. In this embodiment, the high refractive index scattering particles are selected as TiO 2 , Its weight is selected as 15g, and its mass percentage is 18.6%;

[0049] Dispersant, the dispersant selected byk-163 produced by BYK Chemical Co., Ltd. as the dispersant, the weight of which is selected to be 1.2 g, and its mass accounts for 8% of the high refractive index scattering particles;

[0050] Organic solvent, select propylene glycol methyl ether acetate as the organic solvent, the weight is 60g, and the mass percentage is 78.74%;

[0051] Put the above-prepared solution into the grinding jar, fix the grinding jar and the grinding column, add 90ml zirconium beads (note: the amount of zirconium beads ...

Example Embodiment

[0062] Example 2

[0063] This example is improved on the basis of Example 1. An anti-settling agent is added to the grinding dispersion, and byk-410 produced by BYK Chemical Co., Ltd. is selected. The weight is selected as 0.8g, and the mass percentage is 1.03. %;

[0064] Moreover, in this embodiment, the following step is further included between step S2 and step S3: adding photoresist to the film forming solution prepared in step S2; in this embodiment Wherein, the photoresist is selected to be mixed with the film forming solution, and the mass percentage of the photoresist is 40%.

[0065] In this embodiment, the thickness of the scattering layer is 0.6 um. The light extraction efficiency of the OLED device prepared by the preparation method in this embodiment is improved by 100%.

Example Embodiment

[0066] Example 3

[0067] The preparation method of the high refractive index scattering layer provided in this embodiment includes the following steps:

[0068] S1. Preparation of a grinding dispersion, the grinding dispersion comprising:

[0069] High refractive index scattering particles, the mass percentage is: 10%;

[0070] Dispersant whose mass accounts for 36% of the high refractive index scattering particles, that is, its mass percentage is 3.6%;

[0071] Anti-settling agent, its mass percentage: 5%;

[0072] Photoresist, its mass percentage is: 51.5%;

[0073] Organic solvent, its mass percentage is: 30%;

[0074] S2, using filter paper with a filter pore size of 0.9um to filter the grinding dispersion prepared in step S1 to obtain a membrane-forming solution;

[0075] S3. The film-forming solution prepared in step S2 is spin-coated by photolithography to obtain a high refractive index scattering layer.

[0076] In this embodiment, the high refractive index scattering particles are...

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Abstract

The invention discloses a preparation method for a high-refractivity scattering layer and a preparation method for an organic light-emitting diode (OLED) with high luminous efficiency. The preparation method for the high-refractivity scattering layer comprises the following steps of: S1, preparing grinding dispersion, wherein the grinding dispersion comprises 10 to 60 mass percent of high-refractivity scattering particle, a dispersing agent of which the mass is 1 to 60 percent based on the mass of the high-refractivity scattering particles, 0 to 5 mass percent of anti-settling agent, 0 to 60 mass percent of photoresist and 20 to 89.9 mass percent of organic solvent; S2, filter-pressing the grinding dispersion prepared by the step S1 by using filter paper with filtering hole apertures of 0.8 to 1.2 mu m to obtain a film preparation solution; and S3, photoetching and spinning the film preparation solution prepared by the step S2 to obtain the high-refractivity scattering layer. When the high-refractivity scattering layer is arranged between a substrate and an electrode of the OLED with the high luminous efficiency, the luminous efficiency of the OLED can be greatly improved.

Description

technical field [0001] The invention relates to a preparation method of an organic electroluminescent device, in particular to a preparation method of a high refractive index scattering layer and a preparation method of an OLED with high light extraction efficiency. Background technique [0002] OLED (Organic Light-Emitting Diode) is an organic light-emitting diode. A light-emitting unit is arranged on a substrate. The light-emitting unit includes two electrodes, and an organic electroluminescent material layer is arranged between the two electrodes. In the prior art, transparent glass is generally selected as the substrate, and the refractive index of the glass is generally 1.4-1.5, and the refractive index of the organic electroluminescent material layer is generally 1.7-1.8. Therefore, when the light emitted by the organic electroluminescent material is energized and enters the air through the glass, due to the principle of total reflection, most of the light will be conf...

Claims

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Application Information

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IPC IPC(8): H01L51/56
Inventor 张国辉董艳波刘永祥段炼
Owner GUAN YEOLIGHT TECH CO LTD
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