Results 21 to 30 of about 4,601,669 (267)

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. Due to their advantages of energy conservation, environmental protection and easy miniaturization realization, they have garnered much interest and been widely researched.
Ruiqiang Xu, Qiushi Kang, Youwei Zhang, Xiaoli Zhang, Zihui Zhang   +4 more
openaire   +3 more sources

Rapid inactivation of SARS-CoV-2 with deep-UV LED irradiation

Emerging Microbes and Infections, 2020
The spread of novel coronavirus disease 2019 (COVID-19) infections worldwide has raised concerns about the prevention and control of SARS-CoV-2. Devices that rapidly inactivate viruses can reduce the chance of infection through aerosols and contact ...
Hiroko Inagaki, Akatsuki Saito, Hironobu Sugiyama, Tamaki Okabayashi, Shouichi Fujimoto   +4 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

Study on the performance of high-voltage deep ultraviolet light-emitting diodes

Optics Express, 2022
This study fabricated high-voltage, low-current DUV-LEDs by connecting two devices. Due to better current spreading and the enhanced reflective mirror effect, high-voltage devices present a higher dynamic resistance, emission output power, wall-plug efficiency, external quantum efficiency, and view angle than single traditional devices. The study found
Yu-Hsuan Hsu, Kang-Wei Peng, Yi-Hsin Lin, Ming-Chun Tseng, Su-Hui Lin, Meng-Chun Shen, Ting-Zhu Wu, Zhong Chen, Ray-Hua Horng   +8 more
openaire   +2 more sources

Efficacy of 265-nm ultraviolet light in inactivating infectious SARS-CoV-2

Journal of Photochemistry and Photobiology, 2021
Although, Low-pressure (LP) mercury lamps that emit wavelengths of around 254 nm have been widely applied as ultraviolet (UV) light devices for decontamination of microorganisms, they have raised environmental concerns due to their mercury content ...
Hiroshi Shimoda, Junji Matsuda, Tatsuyuki Iwasaki, Daisuke Hayasaka   +3 more
doaj   +1 more source

Light-emitting diodes and photodiodes in the deep ultra-violet range for absorption photometry in liquid chromatography, capillary electrophoresis and gas sensing [PDF]

, 2016
Absorbance measurement in the deep ultra-violet range (below 300 nm) has been one of the most widely used detection methods for analytical techniques as a large number of organic compounds have strong absorption bands in the deep UV region.
Bui, Duy Anh
core   +1 more source

Perspectives on UVC LED: Its Progress and Application

Photonics, 2021
High-quality epitaxial layers are directly related to internal quantum efficiency. The methods used to design such epitaxial layers are reviewed in this article.
Tsung-Chi Hsu, Yu-Tsai Teng, Yen-Wei Yeh, Xiaotong Fan, Kuo-Hsiung Chu, Su-Hui Lin, Kuo-Kuang Yeh, Po-Tsung Lee, Yue Lin, Zhong Chen, Tingzhu Wu, Hao-Chung Kuo   +11 more
doaj   +1 more source

Absorbance based light emitting diode optical sensors and sensing devices [PDF]

, 2008
The ever increasing demand for in situ monitoring of health, environment and security has created a need for reliable, miniaturised sensing devices. To achieve this, appropriate analytical devices are required that possess operating characteristics of ...
O'Toole, Martina, Dermot Diamond, O\u27Toole, Martina, Martina O’Toole, Diamond, Dermot, Martina O’Toole   +5 more
core   +2 more sources

Biomedical and Biotechnology Applications of Deep Ultraviolet Light Emitting Diodes [PDF]

2021 IEEE Research and Applications of Photonics in Defense Conference (RAPID), 2021
The COVID-19 pandemic rekindled attention to biomedical application of the Deep Ultraviolet Light Emitting Diodes that include killing bacteria and viruses, purifying air, disinfecting water supplies, prolonging food storage, increasing plant yield, improving produce quality post-harvest, adjusting lighting spectral power distribution, and regulating ...
openaire   +1 more source

Nitride deep-ultraviolet light-emitting diodes with microlens array [PDF]

Applied Physics Letters, 2005
We report on the fabrication of 280-nm AlGaN-based deep-ultraviolet light-emitting diodes (UV LEDs) on sapphire substrates with an integrated microlens array. Microlenses with a diameter of 12μm were fabricated on the sapphire substrate by resist thermal reflow and plasma dry etching.
M. Khizar, Z. Y. Fan, K. H. Kim, J. Y. Lin, H. X. Jiang   +4 more
openaire   +1 more source