A composition comprising a phosphorescent compound having an emission spectrum the maximum peak wavelength of which is between 380 nm or more and less than 495 nm, having no dendron and represented by the formula (1'), two or more phosphorescent compounds having an emission spectrum the maximum peak wavelength of which is between 495 nm or more and less than 750 nm and having a dendron, and a specific compound:
wherein M represents an iridium atom or the like, n1 represents an integer of 1 or more, n2 represents an integer of 0 or more, E1 and E2 represent a carbon atom or the like, the ring R1' represents a diazole ring, the ring R2 represents a 6-membered aromatic hydrocarbon ring or the like, and A1-G1-A2 represents an anionic bidentate ligand.
一种组合物,包含一种
磷光化合物(其发射光谱的最大峰值波长介于 380 nm 或以上且小于 495 nm 之间,不含树枝状化合物,由式(1')表示)、两种或两种以上
磷光化合物(其发射光谱的最大峰值波长介于 495 nm 或以上且小于 750 nm 之间,具有树枝状化合物)和一种特定化合物:
其中,M 代表
铱原子或类似物,n1 代表 1 或以上的整数,n2 代表 0 或以上的整数,E1 和 E2 代表碳原子或类似物,环 R1' 代表重氮唑环,环 R2 代表 6 元
芳香烃环或类似物,A1-G1-A2 代表阴离子双齿
配体。