An aromatic amine derivative represented by the following formula (1), wherein at least one of Ar1 to Ar3 is represented by the following formula (2), wherein X1 to X3 are independently a nitrogen atom or CR2, provided that two of X1 to X3 are a nitrogen atom and X1 and X3 are not simultaneously a nitrogen atom.
由下式(1)表示的芳香胺衍
生物,其中 Ar1 至 Ar3 中至少有一个由下式(2)表示,其中 X1 至 X3 独立地为氮原子或 CR2,条件是 X1 至 X3 中的两个为氮原子,且 X1 和 X3 不同时为氮原子。