申请人:NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.
公开号:US10340460B2
公开(公告)日:2019-07-02
Provided is a practically useful organic electroluminescent device (organic EL device) having high efficiency and high driving stability while being capable of being driven at a low voltage. The organic electroluminescent device includes a light-emitting layer between an anode and a cathode opposite to each other. The light-emitting layer contains two host materials and at least one light-emitting dopant. One of the two host materials is a host material selected from an indolocarbazole compound having one indolocarbazole ring and an indolocarbazole compound having two indolocarbazole rings, and the other thereof is a host material selected from carbazole compounds.
本文提供了一种实际有用的有机电致发光器件(有机 EL 器件),它具有高效率和高驱动稳定性,同时能够在低电压下驱动。该有机电致发光器件包括一个位于阳极和阴极之间的发光层,阳极和阴极相对。发光层包含两种主材料和至少一种发光掺杂剂。两种宿主材料中的一种是选自具有一个吲哚咔唑环的吲哚咔唑化合物和具有两个吲哚咔唑环的吲哚咔唑化合物的宿主材料,另一种是选自咔唑化合物的宿主材料。