Patent ID: 8592051

Claim:
An organic electroluminescent device, comprising an aromatic amine derivative represented by the following general formula (II′) as a light emitting material: wherein: R is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 5 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbon atoms, a cyano group or a halogen atom; k is an integer of 0 to 8; when k is 2 or more, a plurality of R groups may be the same with or different from each other; A 1 is an unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 5 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 carbon atoms, a cyano group or a halogen atom; A 2 is an unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aryl group having 5 to 50 carbon atoms, an unsubstituted cycloalkyl group having 3 to 50 carbon atoms, a cyano group or a halogen atom; m is an integer of 2 to 5; n is an integer of 0 to 5; a plurality of A 1 groups may be the same with or different from each other; when n is 2 or more, a plurality of A 2 groups may be the same with or different from each other; and the two groups represented by the following formula: in the general formula (II′), may be the same or different from each other, and bond to the pyrene ring at 1-position and 6-position.