| 摘要 |
Provided are a novel aromatic amine derivative represented by the following general formula (1) and an organic electroluminescent device including an organic thin film formed of one or a plurality of layers including at least a light emitting layer interposed between a cathode and an anode, in which at least one layer of the organic thin film contains the aromatic amine derivative alone or as a component of a mixture, which contributes to suppressing molecular crystallization and improving yield in the production of an organic electroluminescent device, whereby an organic electroluminescent device having a long lifetime can be obtained, and the aromatic amine derivative is capable of realizing the organic electroluminescent device: where: R1 represents an aryl group or the like; a represents an integer of 0 to 4; b represents an integer of 1 to 3; and at least one of Ar1 to Ar4 represents a group represented by the following general formula (2): where Ar5 represents a fused aromatic ring group and Ar6 represents an aryl group or an aromatic heterocyclic group, where remaining groups of Ar1 to Ar4, none of which is represented by the general formula (2), each independently represent an aryl group or an aromatic heterocyclic group.
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