It is an object of the present invention to provide an organometallic complex which can increase recombination efficiency of electrons and holes. One aspect of the present invention is an organometallic complex having a structure represented by a general formula (1), wherein each of R
1
and R
2
is any of a halogen group, a —CF
3
group, a cyano group, and an alkoxycarbonyl group, each of R
3
and R
4
is any of hydrogen and an alkyl group having 1 to 4 carbon atoms, and M is an element that belongs to Group 9 or 10 of the periodic table.
本发明的目的是提供一种有机
金属配合物,可以增加电子和空穴的复合效率。本发明的一个方面是一种有机
金属配合物,其具有由通式(1)表示的结构,其中R1和R2中的每一个都是卤素基团、—
CF3基团、
氰基团和烷氧羰基基团中的任意一种,R3和R4中的每一个都是氢原子和具有1至4个碳原子的烷基基团中的任意一种,M是属于周期表第9或第10族元素。