Patent ID: 7745988

Claim:
An organic electroluminescent device comprising: an anode; a cathode which faces the anode; and at least one layer including a luminescent layer that comprises a phosphorescent dopant and is located between the anode and the cathode, wherein the at least one layer includes a 3,6-diphenylcarbazole compound represented by the following formula (II) that can serve as a host material for a guest material: wherein R 1 and R 2 are 4-phenyl groups, R 5 represents a phenyl group or a biphenyl group substituted only with one or more groups selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxy group and a combination thereof, and R 3 and R 4 independently represent a hydrogen atom or an unsubstituted aryl group, wherein the at least one layer includes a hole transporting layer, the luminescent layer, and an electron transporting layer, which are overlaid in this order.