III-nitride based narrow band far-UVC LEDs for airborne and surface disinfection

H. Q.T. Bui, R. T. Velpula, B. Jain, H. P.T. Nguyen

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Narrow-band far-ultraviolet C (λ = 200-230 nm) light-emitting diodes (far-UVC LEDs) are strongly detrimental to airborne pathogen like bacteria and viruses while minimally invasive to human health so they can be used as a disinfectant to suppress the outbreak of infectious diseases with minimum safety concerns. Herein, we investigate a design of AlGaN/AlN nanowire structure in combination with a bandpass filter for a narrow band far-UVC LED at 222 nm center wavelength. The LED achieves an ultra-narrow full width at half maximum (FWHM) of ~12 nm after introducing a metal-dielectric Fabry-Perot optical bandpass interference filter with three periods of Al/MgF2/Al layers. The electrical and optical properties of the nanowire LEDs show the high performances with an internal quantum efficiency (IQE) up to 80% and the maximum power exceeding 10 mW at a current injection of 60 mA. This narrow-band far-UVC LED is a promising candidate for airborne and surface disinfection in occupied spaces to prevent the spread of contagious diseases.

Original languageEnglish (US)
Title of host publicationPRiME 2020
Subtitle of host publicationJoint Symposium: State-of-the-Art Program on Compound Semiconductors 63 (SOTAPOCS 63) -and- GaN and SiC Power Technologies 10
EditorsT. Anderson, J. K. Hite, R. P. Lynch, C. O'Dwyer, E. A. Douglas, Y. Zhao, M. Dudley, B. Raghothamachar, M. Bakowski, N. Ohtani
PublisherIOP Publishing Ltd.
Number of pages7
ISBN (Electronic)9781607689010
StatePublished - 2020
EventPacific Rim Meeting on Electrochemical and Solid State Science 2020, PRiME 200 - Honolulu, United States
Duration: Oct 4 2020Oct 9 2020

Publication series

NameECS Transactions
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862


ConferencePacific Rim Meeting on Electrochemical and Solid State Science 2020, PRiME 200
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • General Engineering


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