申请人:NIPPON STEEL Chemical & Material Co., Ltd.
公开号:EP3767698A1
公开(公告)日:2021-01-20
Provided is a thermally activated delayed fluorescent emission-type organic electroluminescent device (organic EL device) having a low driving voltage, high luminous efficiency, and a long lifetime. The organic EL device is a delayed fluorescent emission-type organic EL device including one or more light-emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light-emitting layers contains a para-biphenylcarbazole compound-type host material represented by the general formula (1), and an indolocarbazole compound-type thermally activated delayed fluorescent light-emitting material including an indolocarbazole ring in a molecule thereof.
本文提供了一种热激活延迟荧光发射型有机电致发光器件(有机 EL 器件),该器件具有驱动电压低、发光效率高和使用寿命长的特点。该有机电致发光器件是一种延迟荧光发射型有机电致发光器件,包括一个或多个位于彼此相对的阳极和阴极之间的发光层,其中至少一个发光层包含由通式(1)表示的对位联苯咔唑化合物型主材料,以及在其分子中包含吲哚咔唑环的吲哚咔唑化合物型热激活延迟荧光发光材料。