Organic electroluminescence device and anthracene derivative

An electroluminescence device which comprises:

• a cathode,
• an anode and
• an organic thin film layer comprising at least one layer comprising a light emitting layer and disposed between the cathode and the anode,
• wherein
• the light emitting layer comprises a light emitting material comprising at least one anthracene derivative represented by general formula (2)
• wherein Ar is a condensed aromatic group 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-pyrenyl group and fluoranthenyl group, each being optionally substituted;
• Ar′ is an aromatic group selected from the group consisting of a 1-naphthyl group, a 2-naphthyl group, a 1-anthryl group, a 2-anthryl group, a 1-phenanthryl group, a 2-phenanthryl group, a 3-phenanthryl group, a 4-phenanthryl group, a 1-naphthacenyl group, a 2-naphthacenyl group, a 9-naphthacenyl group, a 1-pyrenyl group, a 2-pyrenyl group, a 4-pyrenyl group and a fluoranthenyl group, each being optionally substituted;
• X represents a hydrogen or an aromatic group having 6 to 50 nuclear carbon atoms;
• a and b each represent an integer of 0 to 4;
• and
• n represents an integer of 1 to 3 and, when n represents 2 or 3, two or three groups represented by:
• may be a same with or different from each other.