RESIN COMPOSITION FOR LIGHT-SCATTERING LAYER, LIGHT-SCATTERING LAYER, AND ORGANIC ELECTROLUMINESCENCE DEVICE

• Main Authors: CHIBA TAKEHIRO, IWATA KAN, HIRANO AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; SEMICONDUCTOR DEVICES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To minimize influences of a scattering layer on layers to be formed thereon by improving flatness of the scattering layer itself, to prevent generation of dark spots or short circuits, and to extend a service life of an organic EL device.SOLUTION: A resin composition for a light-scattering layer is provided, which comprises light-scattering particles (E) having an average primary particle diameter of 200 to 800 nm, inorganic oxide fine particles (F) having a minor axial diameter of 5 to 60 nm in primary particles, and a polyester dispersant (D). 【課題】本発明では、散乱層自身の平坦性を改善することで、散乱層上に形成される各層への影響を最小限に抑え、ダークスポットや短絡の発生をなくし、有機ＥＬ装置の寿命を長くすることを目的とする。【解決手段】平均一次粒子径が２００〜８００ｎｍである光散乱粒子（Ｅ）と、一次粒子の短軸径が５〜６０ｎｍである無機酸化物微粒子（Ｆ）と、ポリエステル分散剤（Ｄ）とを含むことを特徴とする光散乱層用樹脂組成物により解決される。【選択図】図１