Patent ID: 9564609
Date: 2017-02-07
CPC Classifications: H01L,Y02E

Claim:
1. A light-emitting element comprising: a first electrode on a first insulating layer, the first electrode comprising a first conductive layer, a second conductive layer over and directly in contact with the first conductive layer, and a third conductive layer over and directly in contact with the second conductive layer; a second insulating layer over and in contact with the third conductive layer, the second insulating layer comprising an opening portion which overlaps with the third conductive layer; a hole-injection layer over and in contact with the third conductive layer and the second insulating layer, the hole-injection layer comprising an organic compound having a hole-transporting property and a metal oxide selected from vanadium oxide and molybdenum oxide; a hole-transport layer over and in contact with the hole-injection layer; an electroluminescent layer over and in contact with the hole-transport layer; and a second electrode over the electroluminescent layer wherein the electroluminescent layer overlaps with the first electrode; wherein the first conductive layer is a metal alloy layer consisting essentially of aluminum and titanium, wherein the second conductive layer is a metal layer consisting essentially of titanium, wherein the third conductive layer comprises a metal oxide selected from indium oxide, tin oxide, zinc oxide, and indium oxide-tin oxide, wherein the first conductive layer is in direct contact with the first insulating layer, and wherein the second electrode is capable of transmitting light.