PARK, Kyoung-Jin,KIM, Bitnari,DOH, Yoo-Jin,KANG, Hyun-Ju,LIM, Young-Mook,LEE, Su-Hyun,KIM, Chi-Sik
申请号：
EP20160814586
公开号：
EP3313958(A1)
申请日:
2016.05.13
申请国别(地区):
欧洲专利局
年份:
2018
代理人:
摘要：
The present invention relates to an organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant; the host comprises plural host compounds; at least a first host compound of the plural host compounds has a structure of a nitrogen-containing heterocyclic linker bonded to a nitrogen atom of a carbazole of an indole-carbazole, indene-carbazole, benzofuran-carbazole, or benzothiophene-carbazole residue; and a second host compound has a carbazole-aryl-carbazole or carbazole-carbazole structure. According to the present invention, by using a specific multi-component host different from the conventional organic electroluminescent device, an organic electroluminescent device of significantly improved lifespan is provided.
