An object is to provide an organometallic complex that can emit red light. Another object is to provide an organometallic complex having high emission efficiency. Still another object is to provide an organometallic complex that can emit red light with high luminous efficiency. The present invention provides an organometallic complex having a structure represented by the following general formula (G1′).
In the formula, Ar represents an aryl group having 6 to 25 carbon atoms; R
1
represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and an alkoxy group having 1 to 4 carbon atoms; R
2
to R
8
each represent any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and a halogen group; at least one of pairs R
3
and R
4
, R
4
and R
5
, and R
5
and R
6
may be bound to each other to form a ring; and M represents a central metal of Group 9 elements and Group 10 elements.
本发明的一个目的是提供一种可以发出红光的有机
金属配合物。另一个目的是提供一种具有高发射效率的有机
金属配合物。还有一个目的是提供一种可以以高亮度效率发出红光的有机
金属配合物。本发明提供了一种具有以下一般式(G1')所表示结构的有机
金属配合物。
在公式中,Ar代表具有6至25个碳原子的芳基基团;R1代表氢、具有1至4个碳原子的烷基基团和具有1至4个碳原子的烷氧基团中的任意一种;R2至R8分别代表氢、具有1至4个碳原子的烷基基团、具有1至4个碳原子的烷氧基团和卤素基团中的任意一种;R3和R4、R4和R5以及R5和R6中的至少一对可以结合形成环;M代表第9族元素和第10族元素的中心
金属。