Patent ID: 7951470
Filing Date: 2011-05-31
Classification: C09K,H01L,H05B,Y10S

Abstract:
1. A light-emitting device comprising: a pair of substrates; and a light-emitting element between the pair of substrates, wherein the light-emitting element comprises: wherein the carrier generating layer comprises a first film over the first light emitting layer and a second film over the first film, wherein the first film comprises tris(8-quinolinolato)aluminum and lithium, wherein the second film comprises 4,4′-bis[N-(1-napthyl)-N-phenyl-amino]biphenyl and molybdenum oxide, and wherein the second luminescent material is a quinoxaline derivative represented by the following general formula (1): wherein R1 to R4 are hydrogen or an alkyl group having 4 carbon atoms comprising a straight-chain structure or a branch structure.