Patent ID: 9293724
Filing Date: 2016-03-22
CPC Classification: H01L

Claim Text:
1. A light-emitting element, comprising: a cathode; an anode; and a light-emitting unit provided between the cathode and the anode to emit light when a driving voltage is applied, wherein the light-emitting unit includes a first light-emitting layer emitting first light, an intermediate layer, a second light-emitting layer emitting second light having a different color from the first light, and a third light-emitting layer emitting third light having a different color from the first light, which are laminated from the anode side to the cathode side, wherein each of the second and third light-emitting layers is configured to contain a luminescent material, a host material, and an assist dopant material, wherein the intermediate layer is configured to contain the host material and the assist dopant material, wherein one of the host material and the assist dopant material is material having high electron transportability, and the other thereof is a material having high hole transportability, and wherein, when the concentrations of the assist dopant materials contained in the second light-emitting layer, the third light-emitting layer, and the intermediate layer are respectively expressed by C