| abstract |
In an organic electroluminescent device in which a novel aromatic amine derivative having a specific structure and an organic thin film layer composed of one or more layers including at least a light emitting layer is sandwiched between a cathode and an anode, at least one layer of the organic thin film layer, particularly a hole When the transport layer contains the aromatic amine derivative alone or as a component of a mixture, the molecules are not crystallized, so that the yield of the organic electroluminescent device is improved and the organic electroluminescent device having a long life is provided. . |