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

doi:10.1364/AO.400877

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

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Potassium hydroxide (KOH) and ammonium sulfide (NH₄)₂S_x 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 language	English (US)
Pages (from-to)	7352-7356
Number of pages	5
Journal	Applied Optics
Volume	59
Issue number	24
DOIs	https://doi.org/10.1364/AO.400877
State	Published - 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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10.1364/AO.400877

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

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.",

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T1 - High-performance nanowire ultraviolet light-emitting diodes with potassium hydroxide and ammonium sulfide surface passivation

AU - Bui, Ha Quoc Thang

AU - Velpula, Ravi Teja

AU - Jian, Barsha

AU - Philip, Moab Rajan

AU - Tong, Hien Duy

AU - Lenka, Trupti Rajan

AU - Nguyen, Hieu Pham Trung

PY - 2020/8/20

Y1 - 2020/8/20

N2 - 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.

AB - 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.

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

Abstract

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