Patent ID: 8772757

Claim:
A light emitting device, comprising: a low defect density base structure comprising: a substrate; a GaN-based buffer layer having a first smooth surface that is directly on the substrate and a second smooth surface that is remote from the substrate; a dielectric layer on the second smooth surface that is remote from the substrate; and a GaN layer on the dielectric layer remote from the GaN-based buffer layer; a quantum well active region on the low defect density base structure that emits light, the quantum well active region comprising: a first barrier layer comprising AlGaN; a first well layer comprising GaN directly on the first barrier layer; a second barrier layer comprising AlGaN directly on the first well layer; a second well layer comprising GaN directly on the second barrier layer; and a third barrier layer comprising AlGaN directly on the second well layer; an AlGaN layer on the quantum well active region; and a GaN based contact layer on the AlGaN layer.