申请人:Nippon Steel & Sumikin Chemical Co., Ltd.
公开号:EP2757607A1
公开(公告)日:2014-07-23
Provided is an organic electroluminescent device (organic EL device) which has improved luminous efficiency and a simple configuration, while ensuring sufficient driving stability. This organic electroluminescent device includes a light-emitting layer between an anode and a cathode that are laminated on a substrate. The light-emitting layer contains a phosphorescent light-emitting dopant, and a carbazole compound represented by the following formula (1) as a host material. In the formula (1), E represents oxygen or sulfur, and R1 to R6 each represent hydrogen, an alkyl group, a cycloalkyl group, or an aromatic group represented by the formula (2). In the formula (2), X represents CR9 or nitrogen.
本文提供了一种有机电致发光器件(有机 EL 器件),它具有更高的发光效率和简单的结构,同时还能确保足够的驱动稳定性。这种有机电致发光器件包括层叠在基底上的阳极和阴极之间的发光层。发光层包含磷光发光掺杂剂,以及作为宿主材料的下式(1)表示的咔唑化合物。在式 (1) 中,E 代表氧或硫,R1 至 R6 分别代表氢、烷基、环烷基或由式 (2) 代表的芳香基团。在式 (2) 中,X 代表 CR9 或氮。