High-performance nanowire ultraviolet light-emitting diodes with potassium hydroxide and ammonium sulfide surface passivation

Ha Quoc Thang Bui, Ravi Teja Velpula, Barsha Jian, Moab Rajan Philip, Hien Duy Tong, Trupti Rajan Lenka, Hieu Pham Trung Nguyen

Research output: Contribution to journalArticlepeer-review

Abstract

Potassium hydroxide (KOH) and ammonium sulfide (NH4)2Sx have been used as a surface passivation treatment to improve the electrical and optical performance of AlGaN nanowire ultraviolet (UV) light-emitting diodes (LEDs). Enhancements in photoluminescence at 335 nm (49%), optical output power (65%), and electroluminescence (83%), with respect to the as-grown nanowire LED are recorded for the AlGaN nanowire UV LEDs with surface passivation. These enhancements are attributed to the reduced nonradiative recombination on the nanowire surfaces. This study provides a potential surface passivation approach to produce high-power AlGaN nanowire LEDs operating in the UV spectrum.

Original languageEnglish (US)
Pages (from-to)7352-7356
Number of pages5
JournalApplied Optics
Volume59
Issue number24
DOIs
StatePublished - Aug 20 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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