Patent ID: 9627640
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A light-emitting element comprising: a first electrode; a first light-emitting layer over the first electrode, the first light-emitting layer comprising a mixture of a first organic compound and a second organic compound in a single layer; a second light-emitting layer over the first light-emitting layer, the second light-emitting layer comprising a mixture of the first organic compound and a third organic compound in a single layer; and a second electrode over the second light-emitting layer; wherein the second organic compound is capable of forming a first exciplex with the first organic compound, wherein the third organic compound is capable of forming a second exciplex with the first organic compound, and wherein a first emission peak of the first exciplex and a second emission peak of the second exciplex are different from each other.