Patent ID: 9087946
Filing Date: 2015-07-21
Classification: H01L

Abstract:
1. A light-emitting device, comprising: a first type semiconductor layer; a multi-quantum well structure on the first type semiconductor layer; and a second type semiconductor layer on the multi-quantum well structure, wherein the multi-quantum well structure comprises a first portion near the first type semiconductor layer, a second portion near the second type semiconductor layer, and a strain releasing layer between the first portion and the second portion and comprising a first layer including Indium, a second layer including Aluminum on the first layer, and a third layer including Indium on the second layer, wherein the Indium concentration of the third layer is higher than that of the first layer, wherein the first portion comprises a plurality of first well layers and a plurality of first barrier layers alternately stacked, and the second portion comprises a plurality of second well layers and a plurality of second barrier layers alternately stacked, and wherein the energy level of the conduction band of the second layer is higher than that of the plurality of first well layers, the plurality of first barrier layers, the plurality of second well layers, and the plurality of second barrier layers.