ORGANIC ELECTROLUMINESCENT DEVICE AND MATERIAL FOR ORGANIC ELECTROLUMINESCENT DEVICE

摘要

An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. The organic thin-film layer includes an emitting layer. The emitting layer contains a phosphorescent material and a host material represented by the following formula (1).
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒRa-Ar 1 -Rb€ƒ€ƒ€ƒ€ƒ€ƒ(1)
In the formula, Ar 1 , Ra and Rb each represent a substituted or unsubstituted benzene ring or a fused aromatic hydrocarbon ring selected from a substituted or unsubstituted naphthalene ring, a substituted or unsubstituted chrysene ring, a substituted or unsubstituted fluoranthene ring, a substituted or unsubstituted phenanthrene ring, a substituted or unsubstituted benzophenanthrene ring, a substituted or unsubstituted dibenzophenanthrene ring, a substituted or unsubstituted triphenylene ring, a substituted or unsubstituted benzo[a]triphenylene ring, a substituted or unsubstituted benzochrysene ring, a substituted or unsubstituted benzo[b]fluoranthene ring and a substituted or unsubstituted picene ring. Substituents for Ra and Rb are not aryl groups.