Chinese Science Bulletin

, Volume 57, Issue 20, pp 2562–2566 | Cite as

Advantage of dual wavelength light-emitting diodes with dip-shaped quantum wells

  • YiQin Xu
  • GuangHan Fan
  • DeTao Zhou
  • Xin Li
  • TaiPing Lu
  • Fang Zhao
  • YunYan Zhang
  • ShuWen Zheng
  • ChangChun Gong
Open Access
Article Condensed Matter Physics

Abstract

Dual-wavelength light-emitting diodes (DW-LEDs) with dip-shaped quantum wells have been studied by numerical simulation. The emission spectra, light output power, carrier concentration in the quantum wells and internal quantum efficiency are investigated. The simulation results indicate that the DW-LEDs with dip-shaped quantum wells perform better than conventional LEDs with rectangular quantum wells in terms of light output power, leakage current and efficiency droop. These improvements in the electrical and optical characteristics are mainly attributed to the alleviation of the electrostatic field in the dip-shaped quantum wells.

Keywords

dip-shaped quantum wells numerical simulation dual-wavelength LED 

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Copyright information

© The Author(s) 2012

Authors and Affiliations

  • YiQin Xu
    • 1
  • GuangHan Fan
    • 1
  • DeTao Zhou
    • 1
  • Xin Li
    • 1
  • TaiPing Lu
    • 1
  • Fang Zhao
    • 1
  • YunYan Zhang
    • 1
  • ShuWen Zheng
    • 1
  • ChangChun Gong
    • 1
  1. 1.Institute of Opto-Electronic Materials and TechnologySouth China Normal UniversityGuangzhouChina

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