Patent ID: 8581237
Filing Date: 2013-11-12
Classification: C09K,H01L,H05B

Abstract:
1. A light-emitting element comprising: an anode; a cathode; and a layer comprising an organic compound between the anode and the cathode, wherein the layer comprises at least a light-emitting layer in which a first layer, a second layer, and a third layer are stacked from the anode side, wherein the first layer comprises a first light-emitting substance and a first organic compound, wherein the second layer comprises a second light-emitting substance and a second organic compound, wherein the third layer comprises the first light-emitting substance and a third organic compound, wherein an amount of the first light-emitting substance is larger than an amount of the first organic compound in the first layer, wherein an amount of the second organic compound is larger than an amount of the second light emitting substance in the second layer, wherein an amount of the third organic compound is larger than the amount of the first light-emitting substance in the third layer, wherein the first light-emitting substance has a hole-transporting property, wherein the first organic compound has a hole-transporting property, wherein the first light-emitting substance is a substance represented by the following general formula (i), wherein Ar