申请人:CANON KABUSHIKI KAISHA
公开号:EP1239526A2
公开(公告)日:2002-09-11
An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below:
MLmL'n (1),
wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L' are mutually different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML'n is represented by formula (3) or (4) shown below:
The metal coordination compound of the formula (1) is characterized by having at least one aromatic substituent for at least one of CyN1, CyN2, CyC1 and CyC2. The metal coordination compound having the aromatic substituent is effective in providing high-efficiency luminescence, long-term high luminance, and less deterioration by current passing.
提供了一种电致发光器件,该器件具有含有特定金属配位化合物的层。金属配位化合物用下式(1)表示:
MLmL'n (1)、
其中,M 是 Ir、Pt、Rh 或 Pd 的金属原子;L 和 L' 是互不相同的双齿配位体;m 是 1、2 或 3,n 是 0、1 或 2,但 m+n 是 2 或 3;部分结构 MLm 由下式(2)表示,部分结构 ML'n 由下式(3)或(4)表示:
式(1)的金属配位化合物的特征在于,CyN1、CyN2、CyC1 和 CyC2 中的至少一个具有至少一个芳香取代基。具有芳香取代基的金属配位化合物可有效提供高效率发光、长期高亮度和较少的电流劣化。