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
at least one of the optional substituent(s) of the cyclic groups, and the cyclic groups CyC1 and CyC2 includes a benzofuran structure capable of having a substituent represented by the following formula (5):
2
The metal coordination compound having the benzofuran structure is effective in providing high-efficiency luminescence and long-term high luminance.
提供一种含有特定
金属配位化合物层的电致发光器件。该
金属配位化合物由以下公式(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环状基团和环状基团CyC2中的至少一个可选取代基包括能够具有以下公式(5)所表示的取代基的
苯并呋喃结构。具有
苯并呋喃结构的
金属配位化合物能够提供高效的发光和长期高亮度。