Scholarlink

Abstract <p>In this paper, we present luminescence spectra for three types of light-emitting diodes (LEDs) with rectangular, trapezoidal and triangular InGaN/GaN multiple quantum wells (MQWs), analyzed under various bias conditions through extensive numerical analysis. The nature of luminescence spectra is analyzed on the light of energy band structure, electric field profile, carrier distribution in well and peak shifting of electron and hole concentrations. Our observation reports that the peak of emission spectra for trapezoidal QW (TQW) LED remains at the same wavelength under different bias conditions, unlike rectangular QW (RQW) and triangular QW (TNQW) LEDs. The shifting of luminescence peak towards the longer wavelength is only 1 nm for TQW LED, whereas 6 nm for RQW and 3 nm for TNQW LEDs when bias voltage changes from 0&#xa0;to ±10 V. Moreover, the efficiency droop of TQW LED is very low and it is equal to 3.7%, in contrast of 27.8% for RQW and 7.4% for TNQW LEDs. Therefore, this high efficiency and color-stable lighting performance of TQW LED is useful for different photonic and optoelectronic applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of Luminescence Spectra for InGaN/GaN Rectangular, Trapezoidal, and Triangular MQW Light-Emitting Diodes

  • 期刊论文

  • 发表日期：

    2025年10月24日

查看全文
  • Himanshu Karan

摘要

Abstract

In this paper, we present luminescence spectra for three types of light-emitting diodes (LEDs) with rectangular, trapezoidal and triangular InGaN/GaN multiple quantum wells (MQWs), analyzed under various bias conditions through extensive numerical analysis. The nature of luminescence spectra is analyzed on the light of energy band structure, electric field profile, carrier distribution in well and peak shifting of electron and hole concentrations. Our observation reports that the peak of emission spectra for trapezoidal QW (TQW) LED remains at the same wavelength under different bias conditions, unlike rectangular QW (RQW) and triangular QW (TNQW) LEDs. The shifting of luminescence peak towards the longer wavelength is only 1 nm for TQW LED, whereas 6 nm for RQW and 3 nm for TNQW LEDs when bias voltage changes from 0 to ±10 V. Moreover, the efficiency droop of TQW LED is very low and it is equal to 3.7%, in contrast of 27.8% for RQW and 7.4% for TNQW LEDs. Therefore, this high efficiency and color-stable lighting performance of TQW LED is useful for different photonic and optoelectronic applications.