Aromatic amine derivative, and organic electroluminescent element comprising same

摘要

Provided is an aromatic amine derivative represented by the formula N(ArA)(ArB)(ArC) as an organic EL device material capable of reducing the driving voltage of an organic EL device, and improving its luminous efficiency and device lifetime. ArA represents the formula (II-1) or (II-2). La represents an arylene group or the like, Ara represents an aryl group or the like, and n represents 2 or 3. ArB represents the formula (III). Lb represents a single bond or the like, R1 and R2 each represent an alkyl group or the like, o and p each represent 0 to 3 or the like, X represents an oxygen atom or the like, and R3, R4 and R5 each represent an alkyl group or the like. ArC represents an aryl group, a heteroaryl group, or the formula (II-1), (II-2), or (III).

主权项

1. An aromatic amine derivative, having a formula (I): wherein ArA has formula (II-1):
-LaAra)n  II-1 wherein:
La is a substituted or unsubstituted aromatic ring having 6 to 25 ring carbon atoms;Ara is a substituted or unsubstituted aryl group having 6 to 25 ring carbon atoms; andn is 2 or 3, and a plurality of Ara's may be identical to or different from each other,ArB has a formula (III): wherein:
Lb is a single bond, a substituted or unsubstituted arylene group having 6 to 25 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 5 to 25 ring atoms;R1 and R2 each independently are selected from the group consisting of an alkyl group having 1 to 15 carbon atoms, an alkenyl group having 2 to 15 carbon atoms, a cycloalkyl group having 3 to 15 ring carbon atoms, an aryl group having 6 to 25 ring carbon atoms, a trialkylsilyl group comprising alkyl groups each having 1 to 15 carbon atoms, a triarylsilyl group comprising aryl groups each having 6 to 25 ring carbon atoms, an alkylarylsilyl group comprising an alkyl group having 1 to 15 carbon atoms and an aryl group having 6 to 25 ring carbon atoms, a carbazolyl group, a halogen atom, and a cyano group;o is an integer of 0 to 3, p is an integer of 0 to 4, and a plurality of R1's or R2's adjacent to each other, or R1 and R2 may be bonded to each other to form a ring; andX is an oxygen atom or a sulfur atom, andArC is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 5 to 25 ring atoms, or has the formula (II-1) or (III),with the proviso that the substituents on the substituted groups are selected from an alkyl group having 1 to 15 carbon atoms, a cycloalkyl group having 3 to 15 ring carbon atoms, a trialkylsilyl group formed of alkyl groups each having 1 to 15 carbon atoms, a triarylsilyl group each formed of aryl groups each having 6 to 25 ring carbon atoms, an alkylarylsilyl group each formed of an alkyl group having 1 to 15 carbon atoms, an aryl group having 6 to 25 ring carbon atoms, halogen atoms, and a cyano group.