Results 11 to 20 of about 8,247 (230)

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

Pathogens, 2021
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).
Hiroko Inagaki, Akatsuki Saito, Chiho Kaneko, Hironobu Sugiyama, Tamaki Okabayashi, Shouichi Fujimoto   +5 more
doaj   +9 more sources

Power Enhancement of 265 nm DUV-LED Flip-Chip by HVPE-AlN High-Temperature Annealing. [PDF]

Micromachines (Basel), 2023
In this paper, the X-ray diffraction full width at half the maximum (XRD FWHM) of a 3.5 µm-thick hydride vapor phase epitaxy-aluminum nitride (HVPE-AlN) (002) face after high-temperature annealing was reduced to 129 arcsec. The tensile strain in the HVPE-AlN samples gradually released with the increasing annealing temperature.
Yue W, Liu R, Li P, Zhou X, Liu Y, Yang B, Liu Y, Wang X.   +7 more
europepmc   +8 more sources

A scattered volume emitter micropixel architecture for ultra efficient light extraction from DUV LEDs [PDF]

Scientific Reports
Deep ultraviolet light-emitting diodes (DUV LEDs) typically suffer from strong parasitic absorption in the p-epitaxial layer and rear metal contact/mirror.
Faris Azim Ahmad Fajri, Anjan Mukherjee, Suraj Naskar, Ahmad Fakhrurrazi Ahmad Noorden, Aimi Abass   +4 more
doaj   +9 more sources

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

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   +4 more sources

Influence of Thin Fluorine Resin Film on DUV LED Packaging Devices [PDF]

Applied Sciences, 2023
Amorphous fluorine resin is a promising material that can be used for the encapsulation of deep-ultraviolet light-emitting diodes (DUV LEDs) to promote the light output, due to its light characteristics which mean it shows no absorption in the DUV ...
Wenbo Li, Leming Tang, Yong Yang, Zhicong Zhang, Guanghui Li, Meixin Feng, Qiming Xu, Qian Sun   +7 more
doaj   +3 more sources

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

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   +4 more sources

High Photoluminescence Intensity of Heterostructure AlGaN-based DUV-LED through Uniform Carrier Distribution [PDF]

Physica Scripta, 2022
Abstract We report a numerical analysis of the variation of Aluminium (Al) composition in Al Gallium Nitride (AlGaN)-based Deep-Ultraviolet Light-Emitting Diode (DUV-LED) and its effects on the carrier concentration, radiative recombination, and photoluminescence (PL).
Mohammad Amirul Hairol Aman, Faris Azim Ahmad Fajri, Ahmad Fakhrurrazi Ahmad Noorden, Mahdi Bahadoran, Suzairi Daud, Muhammad Zamzuri Abdul Kadir   +5 more
openalex   +3 more sources

DUV LEDs based on AlGaN quantum dots [PDF]

Gallium Nitride Materials and Devices XVI, 2021
Deep ultraviolet (DUV) light emitting diodes (LED) are expected to be the next generation of UV sources, offering significant advantages such as compactness, low consumption and long lifetimes. Yet, improvements of their performances are still required and the potential of AlyGa1-yN quantum dots as DUV emitters is investigated in this study.
J. Brault, Mohamed Al Khalfioui, Mathieu Leroux, Samuel Matta, Thi-Huong Ngo, Aly Zaiter, Aimeric Courville, B. Damilano, Sébastien Chenot, Jean‐Yves Duboz, J. Massies, Pierre Valvin, Bernard Gil   +12 more
openalex   +3 more sources

AlGaN-Delta-GaN Quantum Well for DUV LEDs [PDF]

Photonics, 2020
AlGaN-delta-GaN quantum well (QW) structures have been demonstrated to be good candidates for the realization of high-efficiency deep-ultraviolet (DUV) light-emitting diodes (LEDs). However, such heterostructures are still not fully understood. This study focuses on investigation of the optical properties and efficiency of the AlGaN-delta-GaN QW ...
Cheng Liu, Bryan Melanson, Jing Zhang
openalex   +4 more sources

Realization of Electrically Driven AlGaN-Delta-GaN QW DUV Micro-LEDs at 265 nm

IEEE Photonics Journal
Quantum efficiency of deep-ultraviolet (DUV) light-emitting diodes (LEDs) is a roadblock for these devices to reach efficiencies comparable to their visible light counterparts.
Bryan Melanson, Jacob Boisvere, Matthew Seitz, Jing Zhang   +3 more
doaj   +3 more sources