Patent ID: 9444063
Filing Date: 2016-09-13
CPC Classification: H01L

Claim Text:
1. A light-emitting element comprising: a hole-transport layer comprising a hole-transport material over a first electrode; a light-emitting layer comprising a guest material and a host material over the hole-transport layer; an electron-transport layer comprising an electron-transport material over and in contact with the light-emitting layer; and a second electrode over the electron-transport layer, wherein the host material is an anthracene compound, wherein the guest material is a pyrene compound, wherein a T1 level of the host material is lower than a T1 level of the guest material, wherein a T1 level of the hole-transport material is higher than the T1 level of the host material, wherein the host material and the electron-transport material are same compound, and wherein the hole-transport material is a phenanthrene compound.