AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT ELEMENT USING THE SAME

摘要

A novel aromatic amine derivative having an asymmetric structure represented by the following general formula (1); and an organic electroluminescent element wherein one or more organic thin-film layers including at least a light emitting layer are held between a cathode and an anode, and wherein at least one of the organic thin-film layers contains the aromatic amine derivative alone or as a component of mixture. Accordingly, there is provided an organic electroluminescent element realizing suppression of molecular crystallization, enhancing of yield in the production thereof and prolongation of service life. Further, there is provided an aromatic amine derivative capable of realizing the organic electroluminescent element. (1) [In the formula, R<SUB>1</SUB> is a hydrogen atom, etc.; a is an integer of 0 to 4; b is an integer of 1 to 3; and at least one of Ar<SUB>1</SUB> to Ar<SUB>4</SUB> is a group represented by the following general formula (2).] (2) [In the formula, R<SUB>2</SUB> and R<SUB>3</SUB> are selected from the same groups as there of R<SUB>1</SUB>.; Ar<SUB>5</SUB> is a condensed aromatic ring group; c and d are integers of 0 to 4; and e is an integer of 0 to 2.] In the general formula (1), those not represented by the general formula (2) among Ar<SUB>1</SUB> to Ar<SUB>4</SUB> each independently are an aryl group or an aromatic heterocyclic group.]