| 摘要 |
An aromatic amine derivative represented by formula (1):
wherein L 1 , L 2 , Ar 1 , Ar 2 , R 1 , R 2 , a, b, and Q are as defined in the specification. An organic electroluminescence device having at least one organic thin film layer which includes the aromatic amine derivative has high emission efficiency and long lifetime. |
