Deep-ultraviolet AlGaN light-emitting diodes with variable quantum well and barrier widths

Su Jin Kim, Tae Geun Kim

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


In this study, a device scheme for improving the internal quantum efficiency (IQE) of AlGaN-based deep-ultraviolet light-emitting diodes (DUV-LEDs) is proposed and numerically investigated using SimuLED software. By step-increasing the thickness of the quantum wells and step-decreasing the thickness of quantum barriers in a multiple quantum well (MQW) structure, the IQE of a DUV-LED at 20 mA is increased by a factor of approximately 1.3 relative to the reference LED. These improvements are attributed to increased radiative recombination rates resulting from enhanced hole injection and uniform carrier distribution within the MQWs.

Original languageEnglish
Pages (from-to)656-660
Number of pages5
JournalPhysica Status Solidi (A) Applications and Materials Science
Issue number3
Publication statusPublished - 2014 Mar


  • device simulations
  • light-emitting diodes
  • potential barriers
  • quantum efficiency
  • quantum wells

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrical and Electronic Engineering


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