Patent ID: 8211552

Claim:
An organic electroluminescence device, comprising: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode; wherein: the organic thin-film layer comprises at least one emitting layer, and the at least one emitting layer comprises: a host material represented by the following formula (1); and at least one phosphorescent material; Ra—Ar 1 —Ar 2 —Ar 3 —Rb (1) where: each of Ra, Rb, Ar 1 , Ar 2 , and Ar 3 individually represents a substituted or unsubstituted benzene ring or a substituted or unsubstituted condensed aromatic hydrocarbon ring selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a triphenylene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzochrysene ring, a benzo[b]fluoranthene ring and a picene ring; when Ar 2 represents a substituted or unsubstituted benzene ring, a substituted or unsubstituted 2,7-phenanthrenediyl group or a substituted or unsubstituted triphenylene ring, [Ra—Ar 1 —] and [Rb—Ar 3 —] are groups that are structured differently from each other; two or fewer of Ar 1 , Ar 2 , and Ar 3 represent benzene rings; and at least one of Ra and Rb represents a substituted or unsubstituted fused aromatic hydrocarbon ring selected from the group consisting of a chrysene ring, a fluoranthene ring, a triphenylene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzochrysene ring, a benzo[b]fluoranthene ring, and a picene ring.