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

Ha Quoc Thang Bui | Zendy; Ravi Teja Velpula | Zendy; Barsha Jian | Zendy; Moab Rajan Philip | Zendy; Hien D. Tong | Zendy; Trupti Ranjan Lenka | Zendy; Hieu Pham Trung Nguyen | Zendy

Open Access

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

Author(s) -

Ha Quoc Thang Bui,

Ravi Teja Velpula,

Barsha Jian,

Moab Rajan Philip,

Hien D. Tong,

Trupti Ranjan Lenka,

Hieu Pham Trung Nguyen

Publication year - 2020

Publication title -

applied optics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.668

H-Index - 197

eISSN - 2155-3165

pISSN - 1559-128X

DOI - 10.1364/ao.400877

Subject(s) - passivation , materials science , light emitting diode , optoelectronics , ultraviolet , nanowire , electroluminescence , potassium hydroxide , diode , photoluminescence , nanotechnology , chemical engineering , layer (electronics) , engineering

Potassium hydroxide (KOH) and ammonium sulfide ( N H 4 ) 2 S 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.

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