Results 11 to 20 of about 8,090 (214)

A 265-Nanometer High-Power Deep-UV Light-Emitting Diode Rapidly Inactivates SARS-CoV-2 Aerosols

mSphere, 2022
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection (COVID-19) is an acute respiratory infection transmitted by droplets, aerosols, and contact.
Hiroshi Ueki, Mutsumi Ito, Yuri Furusawa, Seiya Yamayoshi, Shin-ichiro Inoue, Yoshihiro Kawaoka   +5 more
doaj   +1 more source

High Efficiency Deep Ultraviolet Light-Emitting Diodes With Polarity Inversion of Hole Injection Layer

IEEE Photonics Journal, 2023
In this work, we investigate the performance improvement of N-polar AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) by the inversion of the hole injection layer from N-polar to Ga-polar.
Xu Liu, Shengrui Xu, Hongchang Tao, Yanrong Cao, Xinhao Wang, Hengsheng Shan, Jincheng Zhang, Yue Hao   +7 more
doaj   +1 more source

A compact portable photoacoustic sensor for sub-ppm level SO2 detection with a DUV-LED and a non-resonant photoacoustic cell

Frontiers in Physics, 2023
A photoacoustic module based on a novel 273 nm deep-ultraviolet light-emitting diode (DUV-LED) was developed for sulfur dioxide (SO2) detection. The DUV-LED with an emission angle of 60° emitted a power of 10 mW.
Yujing Jing, Yujing Jing, Chaofan Feng, Chaofan Feng, Ruyue Cui, Ruyue Cui, Jiyu Xue, Jiyu Xue, Lei Dong, Lei Dong, Hongpeng Wu, Hongpeng Wu   +11 more
doaj   +1 more source

Nanophotonic crystals on unpolished sapphire substrates for deep-UV light-emitting diodes

Scientific Reports, 2021
A new method has been established and employed to create a random nanophotonic crystal (NPhC) structure without photolithography on the unpolished side of a single-side-polished sapphire substrate.
Tinh Binh Tran, Feras AlQatari, Quang-Ho Luc   +2 more
doaj   +1 more source

Solar-Blind Optical Wireless Communications Over 80 Meters Using a 265-nm High-Power Single-Chip DUV-LED Over 500 mW in Sunlight

IEEE Photonics Journal, 2023
Direct eye-pattern measurements based on a deep-ultraviolet (DUV) light emitting diode (LED) optical wireless communication system were performed in sunlight.
Hiroyuki Kurosawa, Sachiko Tsuzuki, Manabu Taniguchi, Shin-ichiro Inoue   +3 more
doaj   +1 more source

Quantitative evaluation of SARS-CoV-2 inactivation using a deep ultraviolet light-emitting diode

Scientific Reports, 2021
Inactivation technology for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is certainly a critical measure to mitigate the spread of coronavirus disease 2019 (COVID-19). A deep ultraviolet light-emitting diode (DUV-LED) would be a promising
Takeo Minamikawa, Takaaki Koma, Akihiro Suzuki, Takahiko Mizuno, Kentaro Nagamatsu, Hideki Arimochi, Koichiro Tsuchiya, Kaoru Matsuoka, Takeshi Yasui, Koji Yasutomo, Masako Nomaguchi   +10 more
doaj   +1 more source

Research Progress of AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

Micromachines, 2023
AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) have great application prospects in sterilization, UV phototherapy, biological monitoring and other aspects.
Ruiqiang Xu, Qiushi Kang, Youwei Zhang, Xiaoli Zhang, Zihui Zhang   +4 more
doaj   +1 more source

Improvement of Light Extraction in Deep Ultraviolet GaN Light Emitting Diodes with Mesh P-Contacts

Applied Sciences, 2020
One of the main reasons that the emission efficiency of GaN-based light-emitting diodes (LEDs) decreases significantly as the emission wavelength shorter than 300 nm is the low light extraction efficiency (LEE). Especially in deep ultra-violet (DUV) LEDs,
Shiou-Yi Kuo, Chia-Jui Chang, Zhen-Ting Huang, Tien-Chang Lu   +3 more
doaj   +1 more source

Rapid inactivation of human respiratory RNA viruses by deep ultraviolet irradiation from light-emitting diodes on a high-temperature-annealed AlN/Sapphire template

Opto-Electronic Advances, 2023
Efficient and eco-friendly disinfection of air-borne human respiratory RNA viruses is pursued in both public environment and portable usage. The AlGaN-based deep ultraviolet (DUV) light-emission diode (LED) has high practical potentials because of its ...
Ke Jiang, Simeng Liang, Xiaojuan Sun, Jianwei Ben, Liang Qu, Shanli Zhang, Yang Chen, Yucheng Zheng, Ke Lan, Dabing Li, Ke Xu   +10 more
doaj   +1 more source

User acceptance studies for LED office lighting: light spectrum and correlated colour temperature [PDF]

, 2015
During the last decade, lighting technology based on light-emitting diodes (LEDs) has advanced rapidly and is paving the way for the application of LED lighting in offices. Two experiments were carried out to study user preference for different LED light
Islam, Mohammad Shahidul
core   +1 more source