申请人:Hodogaya Chemical Co., Ltd.
公开号:EP2757860A1
公开(公告)日:2014-07-23
An organic electroluminescent device having a capping layer composed of material having a high refractive index, excelling in thin film stability and durability and having no absorption in the respective wavelength ranges of blue, green, and red is provided to improve device characteristics of the organic electroluminescent device, particularly to greatly improve light extraction efficiency.
The organic electroluminescent device has at least an anode electrode, a hole transport layer, a light emitting layer, an electron transport layer, a cathode electrode, and the capping layer in this order, wherein the capping layer contains an arylamine compound (X) having a structure in which two triphenylamine structures are joined within a molecule via a single bond or a divalent group that does not contain a heteroatom.
本发明提供了一种有机电致发光器件,其封盖层由具有高折射率的材料构成,薄膜稳定性和耐久性优异,并且在蓝、绿、红各自的波长范围内无吸收,从而改善了有机电致发光器件的器件特性,特别是极大地提高了光提取效率。
该有机电致发光器件至少依次具有阳极电极、空穴传输层、发光层、电子传输层、阴极电极和封盖层,其中封盖层包含芳基胺化合物(X),该化合物具有在一个分子内通过单键或不含杂原子的二价基团连接两个三苯胺结构的结构。