Patent ID: 9515279
Filing Date: 2016-12-06
CPC Classification: H01L

Claim Text:
1. A light-emitting element comprising: a pair of electrodes; an EL layer between the pair of electrodes; a first light-emitting layer and a second light-emitting layer in the EL layer, the first light-emitting layer being in contact with the second light-emitting layer, wherein the first light-emitting layer comprises a fluorescent substance and a host material, wherein the second light-emitting layer comprises a first organic compound, a second organic compound, and a substance, wherein the first organic compound and the second organic compound form an exciplex, wherein the substance is capable of converting a triplet excitation energy into luminescence, wherein the first light-emitting layer is capable of emitting light comprising a first spectrum, wherein the second light-emitting layer is capable of emitting light comprising a second spectrum, and wherein the first spectrum includes a shorter wavelength than the second spectrum.