Patent ID: 8587192
Filing Date: 2013-11-19
Classification: C09K,H01L,H05B,Y10S

Abstract:
1. 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: at least one phosphorescent material; and a host material represented by a formula (1) as follows, where: Ar Ra and Rb each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted condensed aromatic hydrocarbon group selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, benzochrysene ring, a picene ring and a benzo[b]fluoranthene ring; when Ar when Ar substituents for Ra and Rb are not aryl groups; and at least one of Ra and Rb is a substituted or unsubstituted condensed aromatic hydrocarbon group selected from the group consisting of a chrysene ring, a fluoranthene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzochrysene ring, a picene ring and a benzo[b]fluoranthene ring.