Patent ID: 8269230
Filing Date: 2012-09-18
Classification: H01L

Abstract:
1. A multilayer-doped organic light emitting diode structure, comprising: a substrate; an anode layer arranged on the substrate; a hole transport layer arranged on the anode layer; a multilayer-doped organic light emitting layer arranged on the hole transport layer and fabricated by a plurality of film deposition and doping processes, wherein the multilayer-doped organic light emitting layer is fabricated by co-evaporating host emitters and guest emitters in an intermittent doping manner, and wherein the multilayer-doped organic light emitting layer emits white light and includes a blue host fluorescent material TBADN (2-Tert-butyl-9, 10-di(naphth-2-yl)anthracene) and a yellow guest fluorescent material Rubrene ((5, 6, 11, 12)-Tetraphenylnaphthacene), and wherein each of the host emitters, which is made of the blue host fluorescent material TBADN, has a thickness of 4 nm; and each of the guest emitters, which is the blue host fluorescent material TBADN doped with the yellow guest fluorescent material Rubrene, has a thickness of 1 nm; wherein the Rubrene has a doping concentration of 13%; the host emitters and the guest emitters being fabricated by 6 times of co-evaporation processes to form the multilayer-doped organic light emitting layer with a total thickness of 30 nm; an electron transport layer arranged on the multilayer-doped organic light emitting layer; an electron injection layer arranged on the electron transport layer; and a metallic cathode layer arranged on the electron injection layer.