| abstract |
A biphenyl derivative having a specific structure represented by the following formula (I), and an organic electroluminescent device in which an organic thin film layer composed of one layer or a plurality of layers having at least a light emitting layer is sandwiched between a cathode and an anode, wherein at least one of the organic thin film layers The layer contains the biphenyl derivative alone or as a component of a mixture, to provide a long life organic EL device, and to provide a biphenyl derivative particularly suitable as a light emitting material used in the organic EL device of the present invention.n n n Formula In n n n n n n n [In formula, Ar < 1> and Ar < 2> are condensed aromatic hydrocarbon group which consists of three or more rings, and Ar < 3> is a phenyl group or condensed aromatic hydrocarbon group which consists of two or more rings. Provided that when either Ar 1 to Ar 3 is an anthracene-9-yl group, the anthracene 10 position is not a hydrogen atom.] |