| abstract |
PROBLEM TO BE SOLVED: To provide an organic electroluminescence device with high luminous efficiency and long-lasting blue light emission, a novel aromatic amine derivative and a material for the organic electroluminescence device realizing the same. An aromatic amine derivative represented by the formula (1) is provided. (In the formula, Ar 1 to Ar 4 each independently represent an aryl group having 6 to 30 nuclear carbon atoms. L 1 and L 2 each independently represents a single bond, an arylene group having 6 to 30 nuclear carbon atoms, or the like. R a represents a substituent, and in a plurality of cases, they may be bonded to each other to form a ring, and n is an integer of 0 to 8.) [Selection figure] None |