Patent ID: 8193545

Claim:
A light emitting device, comprising: a first semiconductor layer; an In x Ga 1−x N layer on the first semiconductor layer; an active layer of a single or multiple quantum well structure on the In x Ga 1−x N layer and including an In y Ga 1−y N well layer and a multilayer barrier layer; and a second semiconductor layer on the active layer, wherein the In x Ga 1−x N layer comprises indium lower in content than the indium included in the In y Ga 1−y N well layer in which y satisfies a relation of 0<y<0.35, and wherein the multilayer barrier layer of the active layer is formed of one of a multilayer barrier layer including an InGaN layer, an AlInN layer and an InGaN/GaN superlattice structure layer; a multilayer barrier layer including an InGaN layer, an AlInN layer and an InGaN layer; a multilayer barrier layer including an InGaN layer, an AlInN layer and a GaN layer; or a multilayer barrier layer including an InGaN layer and AlInN layer.