Patent ID: 8647754

Claim:
An organic electroluminescence device, comprising an organic thin film layer formed of one or more layers including at least a light emitting layer and interposed between a cathode and an anode, wherein the light emitting layer comprises at least one dopant and at least one host material, wherein the at least one dopant is an aromatic diamine derivative by itself or as a component of a mixture, and the at least one host material is an anthracene derivative, wherein the aromatic diamine derivative is represented by formula (I): where: R 2 , R 3 , R 7 and R 8 each represent a hydrogen atom, and R 1 , R 4 , R 5 , R 6 , R 9 , and R 10 each independently represent a hydrogen atom, an alkyl group having 1 to 50 carbon atoms, a cycloalkyl group having 3 to 50 carbon atoms, an aralkyl group having 7 to 50 carbon atoms, or an aryl group having 6 to 50 carbon atoms, and R 11 represents a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms; wherein a plurality of R 11 groups, if present, are not bonded to each other and do not form a ring structure, and A and C each represents a substituted or unsubstituted silyl group, and B represents a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a, b, c, and d each independently represent an integer of 1 to 5, and when a, b, c, or d represents an integer of 2 to 5, A's, B's, C's, or R 11 's may represent groups identical to or different from each other on the same benzene ring, and wherein the anthracene derivative is represented by formula (i): where R 12 to R 19 each independently represent a group selected from a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 50 carbon atoms, a substituted or unsubstituted heteroaryl group having 4 to 50 carbon atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbon atoms, a substituted or unsubstituted alkoxyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group whose aryl portion has 6 to 50 carbon atoms and whose alkyl portion has 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 5 to 50 carbon atoms, a substituted or unsubstituted arylthio group having 5 to 50 carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 1 to 50 carbon atoms, a substituted or unsubstituted silyl group, a carboxyl group, a halogen atom, a cyano group, a nitro group, and a hydroxyl group, and D represents a group derived from a substituted or unsubstituted aromatic ring having 6 to 20 carbon atoms; and E represents an optionally substituted group selected from the group consisting of 1-naphthyl, 2-naphthyl, 1-anthryl, 2-anthryl, 9-anthryl, 1-phenanthryl, 2-phenanthryl, 3-phenanthryl, 4-phenanthryl, 9-phenanthryl, 1-naphthacenyl, 2-naphthacenyl, 9-naphthacenyl, 1-pyrenyl, 2-pyrenyl, 4-pyrenyl, 3-methyl-2naphthyl, 4-methyl-1naphthyl, and 4-methyl-1-anthryl.