scholarly journals High-Sensitivity Ozone Sensing Using 280 nm Deep Ultraviolet Light-Emitting Diode for Detection of Natural Hazard Ozone

2012 ◽  
Vol 03 (08) ◽  
pp. 695-699 ◽  
Author(s):  
Yoshinobu Aoyagi ◽  
Misaichi Takeuchi ◽  
Kaoru Yoshida ◽  
Masahito Kurouchi ◽  
Tsutomu Araki ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Natural Hazard ◽  
Light Emitting Diode ◽  
High Sensitivity ◽  
Light Emitting ◽  
Deep Ultraviolet

Microbicidal effect of deep ultraviolet light-emitting diode irradiation

2020 ◽  
Author(s):  
Tatsuya Takagi ◽  
Jun Nishikawa ◽  
Masashi Yanagihara ◽  
Soichiro Fukuda ◽  
Naoto Kubota ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Deep Ultraviolet

First Demonstration of Semipolar Deep Ultraviolet Light Emitting Diode onm-Plane Sapphire with AlGaN Multiple Quantum Wells

2010 ◽  
Vol 49 (4) ◽  
pp. 040206 ◽  
Author(s):  
Krishnan Balakrishnan ◽  
Vinod Adivarahan ◽  
Qhalid Fareed ◽  
Mohamed Lachab ◽  
Bin Zhang ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Ultraviolet Light ◽  
Light Emitting Diode ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Light Emitting ◽  
Deep Ultraviolet

p-AlInN electron blocking layer for AlGaN-based deep-ultraviolet light-emitting diode

2021 ◽  
Vol 158 ◽  
pp. 107022
Author(s):  
Muhammad Nawaz Sharif ◽  
Mussaab Ibrahim Niass ◽  
Juin J. Liou ◽  
Fang Wang ◽  
Yuhuai Liu
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diode ◽  
Blocking Layer ◽  
Electron Blocking Layer ◽  
Light Emitting ◽  
Deep Ultraviolet

Enhancement in emission efficiency of diamond deep-ultraviolet light emitting diode

2011 ◽  
Vol 99 (6) ◽  
pp. 061110 ◽  
Author(s):  
Toshiharu Makino ◽  
Kiyoshi Yoshino ◽  
Norihiro Sakai ◽  
Kouji Uchida ◽  
Satoshi Koizumi ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Emission Efficiency ◽  
Deep Ultraviolet

A Hybrid Micro-Pixel Based Deep Ultraviolet Light-Emitting Diode Lamp

2010 ◽  
Vol 4 (1) ◽  
pp. 012102 ◽  
Author(s):  
Seongmo Hwang ◽  
Monirul Islam ◽  
Bin Zhang ◽  
Mohamed Lachab ◽  
Joe Dion ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Deep Ultraviolet

scholarly journals Rapid Inactivation of SARS-CoV-2 Variants by Continuous and Intermittent Irradiation with a Deep-Ultraviolet Light-Emitting Diode (DUV-LED) Device

Pathogens ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 754
Author(s):  
Hiroko Inagaki ◽  
Akatsuki Saito ◽  
Chiho Kaneko ◽  
Hironobu Sugiyama ◽  
Tamaki Okabayashi ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Protective Efficacy ◽  
Light Emitting Diode ◽  
Continuous Irradiation ◽  
Light Emitting ◽  
Antiviral Efficacy ◽  
Duv Led ◽  
Deep Ultraviolet ◽  
Intermittent Irradiation ◽  
Led Irradiation

More than 1 year has passed since social activities have been restricted due to the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). More recently, novel SARS-CoV-2 variants have been spreading around the world, and there is growing concern that they may have higher transmissibility and that the protective efficacy of vaccines may be weaker against them. Immediate measures are needed to reduce human exposure to the virus. In this study, the antiviral efficacy of deep-ultraviolet light-emitting diode (DUV-LED) irradiation (280 ± 5 nm, 3.75 mW/cm2) against three SARS-CoV-2 variants was evaluated. For the B.1.1.7, B.1.351, and P.1 variant strains, irradiation of the virus stocks for 1 s resulted in infectious titer reduction rates of 96.3%, 94.6%, and 91.9%, respectively, and with irradiation for 5 s, the rates increased to 99.9%, 99.9%, and 99.8%, respectively. We also tested the effect of pulsed DUV-LED irradiation (7.5 mW/cm2, duty rate: 50%, frequency: 1 kHz) under the same output conditions as for continuous irradiation and found that the antiviral efficacy of pulsed and continuous irradiation was the same. These findings suggest that by further developing and optimizing the DUV-LED device to increase its output, it may be possible to instantly inactivate SARS-CoV-2 with DUV-LED irradiation.

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