Patent ID: 8237175
Filing Date: 2012-08-07
Classification: B82Y,H01L,Y02E

Abstract:
1. A method of controlling the emission spectrum of a light emitting diode, comprising the steps of: providing a light emitting diode, comprising: a substrate having a smooth surface and comprising a material selected from the group consisting of sapphire, silicon carbide, zinc oxide, silicon, gallium arsenide, gallium nitride, aluminum nitride and aluminum gallium nitride; a first layer grown on said substrate, said first layer having upper and lower surfaces, the lower surface grown onto and contacting the smooth surface of said substrate, a first contact electrically connected to the first layer; one or more quantum well layers on respective barrier layers deposited directly on said first layer and textured by the upper surface of the first layer, an upper layer on said quantum well layers comprising a III-nitride semiconductor separated from the quantum well layers by a further barrier layer, wherein the upper layer and further barrier layer are surface textured by the surface of the adjacent quantum well layer; passing a current through the device between said first and second contacts; wherein the electroluminescence spectrum of the diode is controlled by said current.