Numerical investigation of blue InGaN light-emitting diodes with staggered quantum wells

Bo Ting Liou, Miao Chan Tsai, Chih Teng Liao, Sheng Horng Yen, Yen Kuang Kuo

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

Effect of polarization on optical characteristics of blue InGaN LEDs with staggered QW are numerically investigated in this article by using APSYS simulation program. Specifically, band diagram, carrier distribution, and output power have been discussed. According to the simulation results, the structure of staggered QW is proposed to reduce the polarization-related effect; furthermore, the staggered QW structure together with thinner well width is beneficial for improvement of the output power of the blue InGaN SQW LEDs. In this work, the best optical performance is obtained when the quantum-well structure is designed as In0.20Ga0.80N (0.9 nm)-In 0.26Ga0.74N (1.1 nm) owing mainly to the enhanced overlap of electron and hole wavefunctions inside the QW.

Original languageEnglish
Article number72111D
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume7211
DOIs
Publication statusPublished - 2009 May 5

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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