Patent ID: 6627333
Filing Date: 2003-09-30
Classification: H01L,Y10S

Abstract:
An organic light-emitting diode (OLED) device which produces substantially white light, comprising:a) a substrate; b) an anode disposed over the substrate; c) a hole injecting layer disposed over the anode; d) a hole transport layer disposed over the hole injecting layer; e) a light-emitting layer doped with a blue light-emitting compound, disposed directly on the hole transport layer; f) an electron transport layer disposed over the blue compound doped light-emitting layer; g) a cathode disposed over the electron transport layer; h) the hole transport layer, being selectively doped in a region which corresponds to an entire layer or a partial portion of a layer in contact with the blue compound doped light-emitting layer, the selective doping being with a compound which emits light in the yellow region of the spectrum; and i) the electron transport layer being selectively doped with a compound in a region which corresponds to an entire layer or a partial portion of a layer in contact with the blue compound doped light-emitting layer, the selective doping being with a compound which emits light in the green region of the spectrum.