Patent ID: 8512876
Filing Date: 2013-08-20
Classification: H01L,Y10S

Abstract:
1. An organic El device, comprising: a transparent substrate; an anode formed on the transparent substrate; a hole injection layer formed on the first electrode, and formed of a mixture of at least a first organic material and at least one inorganic material; a first hole transport layer formed on the hole injection layer, and formed of at least a second organic material; a second hole transport layer formed on the first hole transport layer, and formed of at least a third organic material; an emitting layer formed on the second hole transport layer; an electron transport layer formed on the emitting layer; an electron injecting layer formed on the electron transport layer; and a cathode formed on the electron injecting layer, wherein the hole injection layer contacts the anode and the first hole transport layer; wherein the first hole transport layer contacts the hole injection layer and the second hole transport layer and; wherein the second hole transport layer contacts with the first hole transport layer and the emitting layer; wherein the first organic material, the second organic material, and the third organic material are different from each other; wherein a thickness of the first hole transport layer is different from a thickness of the second hole transport layer; wherein the thickness of the first hole transport layer is thicker than a thickness of the hole injection layer; wherein the thickness of the second hole transport layer is thicker than a thickness of the emitting layer; and wherein the thickness of the emitting layer is thinner than the thickness of the hole injection layer.