Patent ID: 8324802

Claim:
An electroluminescence device comprising a pair of electrodes and a layer of an organic light emitting medium disposed between the pair of electrodes, wherein the layer of an organic light emitting medium comprises: (A) a diaminopyrene derivative represented by the following formula (V): wherein X 3 is an unsubstituted pyrene residue, Ar 5 and Ar 6 are each independently a phenyl group, a biphenyl group or a terphenyl group, each being optionally substituted by an alkyl group having 1 to 6 carbon atoms or a halogen atom, at least one of Ar 5 and Ar 6 is substituted by the alkyl group having 1 to 6 carbon atoms or the halogen atom, and p is 2, and (B) is an anthracene derivative represented by the following formula (II): A 3 -An-A 4 (II) wherein An is an unsubstituted divalent anthracene residue, A 3 and A 4 are each independently a substituted or unsubstituted aryl group having 6 to 40 carbon atoms, and at least one of A 3 and A 4 is a substituted or unsubstituted monovalent condensed aromatic ring group or a substituted or unsubstituted aryl group having 10 or more carbon atoms, a weight ratio of the component A and the component B is 1:99 to 20:80.