申请人:CANON KABUSHIKI KAISHA
公开号:EP1211257A2
公开(公告)日:2002-06-05
An organic EL device includes a luminescence layer containing, as a luminescent material allowing a high-luminescence and high-efficiency luminescence for a long period of time, a metal coordination compound represented by the following formula (1): LmML'n, wherein M denotes Ir, Pt, Ph or Pd; L denotes a bidentate ligand; L' denotes a bidentate ligand different from L; m is an integer of 1, 2 or 3; and n is an integer of 0, 1 or 2 with the proviso that the sum of m and n is 2 or 3. The partial structure MLm is represented by a formula (2) or a formula (3) shown below, and the partial structure ML'n is represented by a formula (4) or a formula (5) shown below:
wherein CyN1, CyN2 and CyN3 independently denote a substituted or unsubstituted cyclic group containing a nitrogen atom connected to M; CyN4 denotes a cyclic group containing 8-quinoline or its derivative having a nitrogen atom connected to M; CyC1, CyC2 and CyC3 independently denote a substituted or unsubstituted cyclic group containing a carbon atom connected to M, with the proviso that the metal coordination compound is represented by the formula (2) when n is 0.
一种有机电致发光器件包括一个发光层,该发光层含有下式(1)表示的金属配位化合物,该金属配位化合物是一种发光材料,可以长时间发出高亮度和高效率的荧光:LmML'n,其中 M 表示 Ir、Pt、Ph 或 Pd;L 表示双齿配体;L'表示不同于 L 的双齿配体;m 是 1、2 或 3 的整数;n 是 0、1 或 2 的整数,但 m 和 n 之和为 2 或 3。部分结构 MLm 用下图中的式 (2) 或式 (3) 表示,部分结构 ML'n 用下图中的式 (4) 或式 (5) 表示:
其中 CyN1、CyN2 和 CyN3 独立地表示含有与 M 相连的氮原子的取代或未取代的环状基团;CyN4 表示含有与 M 相连的氮原子的 8-喹啉或其衍生物的环状基团;CyC1、CyC2 和 CyC3 独立地表示含有与 M 相连的碳原子的取代或未取代的环状基团,但当 n 为 0 时,金属配位化合物由式(2)表示。