Investigation of InGaN green light-emitting diodes with chirped multiple quantum well structures

被引：17

作者：

Chang, Yi-An ^{[1
]}

Kuo, Yih-Ting ^{[2
]}

Chang, Jih-Yuan ^{[1
]}

Kuo, Yen-Kuang ^{[1
]}

机构：

[1] Natl Changhua Univ Educ, Dept Phys, Changhua 500, Taiwan

[2] Natl Changhua Univ Educ, Inst Photon, Changhua 500, Taiwan

来源：

OPTICS LETTERS | 2012年 / 37卷 / 12期

关键词：

EFFICIENCY; LASERS;

D O I：

10.1364/OL.37.002205

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The effect of using chirped multiple quantum-well (MQW) structures in InGaN green light-emitting diodes (LEDs) is numerically investigated. An active structure, which is with both thick QWs with low indium composition on the p-side and thin QWs with high indium composition next to the n-region, is presented in this study. The thickness and indium composition in each single QW is specifically tuned to emit the same green emission spectrum. Comparing with conventional active structure design of green LEDs, which is using uniform MQWs, the output power is increased by 27% at 20 mA, and by 15% at 100 mA current injections. This improvement is mainly attributed to the enhanced efficiency of carrier injection into QWs and the improved capability of carrier transport. (C) 2012 Optical Society of America

引用

页码：2205 / 2207

页数：3

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