Resin compositions for light-scattering layer, light-scattering layer and organic electro luminescence device

An electroluminescent device and resin composition technology, which are applied to optomechanical equipment, photosensitive materials for optomechanical equipment, circuits, etc., can solve the problems of inability to extract, lose light, and insufficient light extraction efficiency, and achieve wavelength dependence. The effect of low performance and high light extraction efficiency

Active Publication Date: 2013-07-17
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is easy to produce total reflection or interference at the light-emitting interface, the light extraction efficiency is less than 20%, and most of the light is lost
However, depending on the incident angle at the interface between adjacent layers with different refractive indices, the light is totally reflected, and the guided light that advances while being totally reflected in the surface direction inside the device is absorbed and attenuated inside, so that it cannot be extracted to the outside.

Method used

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  • Resin compositions for light-scattering layer, light-scattering layer and organic electro luminescence device
  • Resin compositions for light-scattering layer, light-scattering layer and organic electro luminescence device
  • Resin compositions for light-scattering layer, light-scattering layer and organic electro luminescence device

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1-1～1-22

[0337] [Manufacturing Examples 1-1 to 1-22, Examples 1-1 to 1-29, Comparative Examples 1-1 to 1-4]

[0338] (1-1) Preparation of resin (A) solution

manufacture example 1-1

[0340] Process 1:

[0341] 100 parts of PGMEA (propylene glycol monomethyl ether acetate: propylene glycol monomethyl ether acetate) was added as a solvent to a reaction container equipped with a stirrer, a thermometer, a titration device, a reflux condenser, and a gas introduction tube. It heated to 80 degreeC, injecting nitrogen into this container. Keeping the temperature, add dropwise 5.0 parts of styrene (St), 15.9 parts of cyclohexyl methacrylate (CHMA), 31.7 parts of methacrylic acid (MAA), and 2,2'-azobisisobutyronitrile 3.0 parts of the mixture and subjected to polymerization. After completion of the titration, it was further reacted at 70° C. for 3 hours, then what dissolved 0.5 part of azobisisobutyronitrile in 40 parts of PGMEA was added, and stirring was continued at the same temperature for 3 hours to obtain a copolymer.

[0342] Process 2:

[0343] Next, dry air was introduced into the reaction vessel, and 50.0 parts of glycidyl methacrylate (GMA), 37.0 parts...

manufacture example 1-2～1-10

[0346] Resin solutions (A1-2) to (A1-10) were obtained in the same manner as in Production Example 1-1 except that the reaction conditions (composition to be charged and reaction temperature) were changed to those shown in Table 1.

[0347] 【Table 1】

[0348]

[0349] Each abbreviation in Table 1 is explained below.

[0350] PGMEA: Propylene Glycol Monomethyl Ether Acetate,

[0351] DCPMA: dicyclopentyl methyl methacrylate,

[0352] CHMA: cyclohexyl methyl methacrylate,

[0353] St: Styrene,

[0354] M-110: p-cumylphenol ethylene oxide modified acrylate,

[0355] HEMA: Hydroxyethyl methacrylate,

[0356] MAA: methacrylic acid,

[0357] GMA: glycidyl methyl methacrylate,

[0358] MMA: methyl methacrylate.

[0359] The unit of the compounding quantity in Table 1 is "part".

[0360] (1-2) Preparation of light-scattering particle (B) dispersion

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Abstract

The invention relates to a light-scattering layer used for forming an organic EL device. The light-scattering layer comprises an adhesive composition containing at least one resin (A) and resin compositions for a light-scattering layer of light-scattering particles (B). In a first resin composition for the light-scattering layer, an average particle diameter of the light-scattering particles (B) is above 200nm and below 500nm, and particles having a particle diameter above 600nm accounts for 20 volume% of the total amount of the light-scattering particles (B), and a refraction difference between the adhesive composition and the light-scattering particles (B) is above 0.1. In a second resin composition for the light-scattering layer, the resin (A) has double bonds and / or a cross-linking group, and has a mass average molecular weight (Mw) above 5,000 and less than 20,000; the light-scattering particles (B) has an average particle diameter above 200nm and below 1.0[miu]m in the resin compositions for the light-scattering layer; and a refraction difference between the adhesive composition and the light-scattering particles (B) is above 0.1.

Description

technical field [0001] This application claims priority based on Japanese Patent Application No. 2012-005830 filed on January 16, 2012, and Japanese Patent Application No. 2012-132439 filed on June 12, 2012, and discloses the contents thereof All are incorporated in this application. [0002] The present invention relates to a resin composition for a light-scattering layer that can be used to improve the luminous efficiency of an organic electroluminescence (hereinafter also referred to as EL) device, a light-scattering layer formed of the resin composition for a light-scattering layer, and a light-scattering layer comprising the light-scattering layer. An organic EL device with a scattering layer. Background technique [0003] The organic EL element is a self-luminous element utilizing the principle that a fluorescent substance or the like emits light by recombination energy of positive holes injected from the anode and electrons injected from the cathode by application of...

Claims

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Application Information

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IPC IPC(8): G03F7/004G03F7/032G03F7/033H01L51/54
CPCH01L21/0271H10K59/1213H10K50/11
Inventor 木田佳奈岩田贯千阪二郎平野彰近藤庆一
Owner TOYO INK SC HOLD CO LTD
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