Patent ID: 8703305

Claim:
A light-emitting element comprising: a first electrode; a layer over the first electrode, wherein the layer comprises a light-emitting material and an organic compound; and a second electrode over the layer, wherein the organic compound comprises: a quinoxaline skeleton; a first carbazole skeleton which is substituted with a first aryl group at a 9-position of the first carbazole skeleton; a second carbazole skeleton which is substituted with a second aryl group at a 9-position of the second carbazole skeleton; a first phenylene group bonding to the quinoxaline skeleton and the first carbazole skeleton; and a second phenylene group bonding to the quinoxaline skeleton and the second carbazole skeleton, wherein an amount of the organic compound in the layer is larger than that of the light-emitting material in the layer, wherein one of the first phenylene group and the second phenylene group is bonded to the 2-position of the quinoxaline skeleton, and wherein the other of the first phenylene group and the second phenylene group is bonded to the 3-position of the quinoxaline skeleton.