Patent ID: 8361637

Claim:
An organic electroluminescent device comprising: a pair of electrodes; and at least one organic layer between the pair of electrodes, the at least one organic layer including a light emitting layer, the device comprising, in the at least one organic layer, a compound represented by formula (I): wherein Qs each independently represents a t-butyl group or a trimethylsilyl group; R represents a hydrogen atom, an alkyl group, a cyano group, an aryl group, or a heteroaryl group, and when the compound has a plurality of Rs, the Rs each independently represents a hydrogen atom, an alkyl group, a cyano group, an aryl group, or a heteroaryl group; and n stands for 1 or 2, wherein the light emitting layer includes a platinum complex material, and wherein the light emitting layer further contains a compound represented by formula (a): wherein R 1 to R 4 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, an acyl group, an acyloxy group, an amino group, a nitro group, a cyano group, an ester group, an amide group, a halogen group, a perfluoroalkyl group, or a silyl group, and at least one of R 1 to R 4 represents a group with a double bond or a triple bond; and X 1 to X 12 each independently represents a hydrogen atom, an alkyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, an acyl group, an acyloxy group, an amino group, a nitro group, a cyano group, an ester group, an amide group, a halogen group, a perfluoroalkyl group, or a silyl group.