An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below:
ML
m
L′
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:
1
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.
提供了一种含有特定
金属配位化合物层的电致发光器件。该
金属配位化合物由下式(1)表示:MLmL′n(1),其中M为Ir、Pt、Rh或Pd的
金属原子;L和L'为不同的双齿
配体;m为1、2或3,n为0、1或2,但m+n为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:1式(1)中的
金属配位化合物的特征是至少在CyN1、CyN2、CyC1和CyC2中的至少一个上具有芳香基取代。具有芳香基取代的
金属配位化合物能够有效提供高效率发光、长期高亮度和通过电流的少量退化。