Patent ID: 8247837

Claim:
A light-emitting diode with high lighting efficiency, comprising: a substrate; a first doping type semiconductor layer formed on the substrate; a light-emitting layer formed on the first doping type semiconductor layer; a second doping type semiconductor layer formed on the light-emitting layer, the second doping type semiconductor layer having a top surface; a plurality of laminated structures formed on the top surface of the second doping type semiconductor layer such that the top surface is partially exposed, wherein each laminated structure is formed of a plurality of transparent insulating layers with respective refractive indices, and a plurality of gaps are formed between the laminated structures; and a transparent conductive layer formed to cover the laminated structures and the exposed part of the top surface of the second doping type semiconductor layer, wherein the transparent conductive layer passes through the gaps between the laminated structures and directly contacts the exposed part of the top surface of the second doping type semiconductor layer; wherein the values of the refractive indices of the transparent insulating layers are between the value of the refractive index of the second doping type semiconductor layer and the value of the refractive index of the transparent conductive layer, each of the laminated structures is formed in a way of upwardly stacking the transparent insulating layers in sequence with the refractive indices of the transparent insulating layers decreasing gradually.