| abstract |
An organic EL device material capable of lowering the voltage of the organic EL device and improving the device life than the conventional organic EL device material, specifically, an aromatic amine represented by N (Ar a ) (Ar b ) (Ar c ) It provides a derivative and an organic EL device using the same. [Ar a is represented by the following general formula (II). [Formula II] (In Formula II, L <a> represents a single bond or an arylene group, R < 1> -R < 4> represents an alkyl group, an aryl group, etc., R < 3> and R < 4> , R < 3> and R < 4> may combine with each other, and may form a ring. o represents 0-3, p represents 0-4) Ar b is represented by the following formula (III). [Formula III] (In Formula III, X represents NR a , O or S, R a , R 5 -R 7 represents an alkyl group, an aryl group, etc., and R 5 , R 6 and R 7 comrades, R 5 and R 6 are bonded to each other. N may represent 2 to 4 when X is NR a and 0 to 4 when X is O or S. q is 0 to 3, and r and s are each independently 0? 4). Ar c represents an aryl group or is represented by Formula III.] |