ORGANIC ELECTROLUMINESCENT ELEMENT

• Main Authors: KISHIRO FUKASHI, SHIRAISHI TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 23.03.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To provide an organic electroluminescent element capable of achieving cost reduction and high light extraction efficiency while concurrently satisfying formation of a light scattering layer and a high-refractive flat layer and reductions in water content and volatile organic constituent.SOLUTION: An organic electroluminescent element, in which a light scattering layer 9, a smooth layer 10, an anode layer 2, an organic light-emitting layer 6 and a cathode layer 7 are sequentially laminated on a glass substrate 1, uses a styrene resin as a main material of the smooth layer, whose refraction factor is not less than 1.7. 【課題】光散乱層および高屈折平坦層の形成と、水分や揮発性有機成分の低減を両立させた、安価で、高い光取出し効率を持つ有機エレクトロルミネッセンス素子を提供すること。【解決手段】ガラス基板１上に、光散乱層９、平滑層１０、陽極層２、有機発光層６、陰極層７を順次積層した有機エレクトロルミネッセンス素子であって、前記平滑層の主材料にスチレン樹脂を用い、平滑層の屈折率を１．７以上にしたことを特徴とする有機エレクトロルミネッセンス素子。【選択図】図１