| abstract |
Provided is an aromatic amine derivative represented by N (Ar A ) (Ar B ) (Ar C ) as an organic EL device material capable of lowering the organic EL device and improving luminous efficiency and device life. Ar A represents the following formula (II-1) or (II-2). L a is an arylene group or the like, Ar a is an aryl group or the like and n represents 2 or 3. Ar B represents the following general formula (III). L b represents a single bond, R 1 and R 2 represent an alkyl group, o and p represent 0 to 3, X represents an oxygen atom, and R 3 , R 4 and R 5 represent an alkyl group and the like. Ar C represents an aryl group, heteroaryl group, the following formula (II-1), (II-2) or (III). [Formula II-1] [Formula II-2] (III) |