申请人:Nippon Steel & Sumikin Chemical Co., Ltd.
公开号:EP2757608A1
公开(公告)日:2014-07-23
Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple construction. The organic electroluminescent device includes an organic layer including a light-emitting layer between an anode and cathode laminated on a substrate, and at least one layer of the organic layer contains a carbazole compound represented by the following formula (1). It is advantageous to incorporate the carbazole compound as a host material into the light-emitting layer. In the formula (1), A represents a direct bond or an n-valent group, E represents oxygen or sulfur, and n represents an integer of 2 to 4.
本发明提供了一种有机电致发光器件(organic EL device),其发光效率更高,充分保证了驱动稳定性,且结构简单。该有机电致发光器件包括有机层,有机层包括层叠在基底上的阳极和阴极之间的发光层,有机层的至少一层含有下式(1)表示的咔唑化合物。将咔唑化合物作为主材料掺入发光层是有利的。式(1)中,A 代表直接键或 n 价基团,E 代表氧或硫,n 代表 2 至 4 的整数。