Patent ID: 8318324

Claim:
An electroluminescence device which comprises: a cathode, an anode, and an organic thin film layer disposed between the cathode and the anode, wherein the organic thin film layer comprises at least one layer, comprising a light emitting layer and at least one layer of the organic thin film layer comprises an anthracene derivative of formula (2): wherein Ar is selected from the group consisting of 1-naphthyl group, 2-naphthyl group, 1-anthryl group, 2-anthryl group, 1-phenanthryl group, 2-phenanthryl group, 3-phenanthryl group, 4-phenanthryl group, 1-naphthacenyl group, 2-naphthacenyl group, 9-naphthacenyl group, 1-pyrenyl group, 2-pyrenyl group, 4-pvrenyl group, and a fluoranthenyl group, each being optionally substituted; Ar′ is one aromatic group having 6 to 50 nuclear carbon atoms which is optionally substituted; X is a substituted or unsubstituted aromatic group having 6 to 50 nuclear carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 5 to 50 nuclear atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxyl group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 50 carbon atoms, a substituted or unsubstituted aryloxyl group having 5 to 50 nuclear atoms, a substituted or unsubstituted arylthio group having 5 to 50 nuclear atoms, a substituted or unsubstituted alkoxycarbonyl group having 1 to 50 carbon atoms, carboxyl group, a halogen atom, cyano group, nitro group or hydroxyl group; a and b are each an integer of 0 to 4; and n is an integer of 1 to 3 and, when n represents 2 or 3, two or three groups represented by: may be the same or different.