申请人:Yabunouchi Nobuhiro
公开号:US20090066239A1
公开(公告)日:2009-03-12
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: R
1
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 Ar
1
to Ar
4
represents a group represented by the following general formula (2):
where Ar
5
represents a fused aromatic ring group and Ar
6
represents an aryl group or an aromatic heterocyclic group,
where remaining groups of Ar
1
to Ar
4
, none of which is represented by the general formula (2), each independently represent an aryl group or an aromatic heterocyclic group.