Organic-electroluminescent-element material and organic electroluminescent element using same
申请人:NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
公开号:US10446767B2
公开(公告)日:2019-10-15
Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple construction. The device is an organic electroluminescent device having organic layers including a light-emitting layer between an anode and a cathode laminated on a substrate, in which a carborane compound is incorporated into at least one layer of the organic layers, or is incorporated as a host material into a light-emitting layer containing a phosphorescent light-emitting dopant and the host material. The carborane compound has a structure in which a N-containing fused aromatic ring is bonded to a carborane ring. The N-containing fused aromatic ring is a quinoline ring or has a structure obtained by substituting 1 to 3 ring-forming carbon atoms in a quinoline ring with N atoms.
本发明公开了一种有机电致发光器件(有机EL器件),其具有提高的发光效率、足够的驱动稳定性和简单的结构。该器件是一种有机电致发光器件,包括在基板上层叠的阳极和阴极之间的有机层,其中至少一个有机层中掺入了碳硼烷化合物,或者将碳硼烷化合物作为宿主材料掺入含有磷光致发光剂和宿主材料的发光层中。碳硼烷化合物具有将含N的融合芳香环连接到碳硼烷环的结构。含N的融合芳香环是喹啉环或通过将喹啉环中1至3个环形碳原子替换为N原子获得的结构。