Patent ID: 8564193
Filing Date: 2013-10-22
Classification: H01L

Abstract:
1. A light-emitting device comprising: an anode and a cathode over a substrate; an electron transporting layer and a hole transporting layer between the anode and the cathode; a light-emitting layer between the electron transporting layer and the hole transporting layer, wherein the light-emitting layer includes a first layer and a second layer in direct contact with the first layer, wherein the first layer includes a first organic compound having an electron transporting property and a third organic compound having an electron trapping property, wherein the second layer includes a second organic compound having a hole transporting property and the third organic compound having the electron trapping property, and wherein an amount of the first organic compound contained in the first layer is larger than that of the third organic compound, and an amount of the second organic compound contained in the second layer is larger than that of the third organic compound.