Patent ID: 9059421
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A light-emitting element comprising: a first electrode, a second electrode, and an electroluminescence layer interposed between the first electrode and the second electrode, wherein the electroluminescence layer comprises a light-emitting layer in which a first light-emitting layer and a second light-emitting layer are stacked, wherein the first light-emitting layer contains a first organic compound and a second organic compound, wherein the second light-emitting layer contains a third organic compound and a phosphorescent substance, wherein a combination of the first organic compound and the second organic compound forms a first exciplex, wherein the first light-emitting layer is in contact with the second light-emitting layer, wherein the first light-emitting layer is a fluorescent layer, wherein the second light-emitting layer is a phosphorescent layer, and wherein the first organic compound and the second organic compound are mixed in the first light-emitting layer to form a single light-emitting layer.