Results 51 to 60 of about 8,247 (230)

Improved Characteristics of AlGaN-Based Deep Ultraviolet Light-Emitting Diodes with Superlattice p-Type Doping

IEEE Photonics Journal, 2017
The photoelectric properties and physical mechanism of AlGaN-based deep ultraviolet light emitting diodes (DUV-LEDs) with the superlattice p-type doping layer (PSL) are studied numerically and compared with the Al-composition (50%) conventional p ...
Qianying Si, Hangyang Chen, Shuping Li, Shiqiang Lu, Junyong Kang   +4 more
doaj   +1 more source

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

Quasi‐2D Growth of Aluminum Nitride Film on Graphene for Boosting Deep Ultraviolet Light‐Emitting Diodes

Advanced Science, 2020
Efficient and low‐cost production of high‐quality aluminum nitride (AlN) films during heteroepitaxy is the key for the development of deep ultraviolet light‐emitting diodes (DUV‐LEDs).
Hongliang Chang, Zhaolong Chen, Bingyao Liu, Shenyuan Yang, Dongdong Liang, Zhipeng Dou, Yonghui Zhang, Jianchang Yan, Zhiqiang Liu, Zihui Zhang, Junxi Wang, Jinmin Li, Zhongfan Liu, Peng Gao, Tongbo Wei   +14 more
doaj   +1 more source

Event-marketing as innovative marketing communications: Reviewing the German experience [PDF]

, 2004
As a result of significant changes in their marketing environments and in consumer behaviour, marketers are confronted with the decreasing effectiveness of their classic marketing communications (Kroeber-Riel 1984) and, consequently, in need of new ways ...
Whelan, Susan, Wohlfeil, Markus
core   +1 more source

Characteristics of collection and inactivation of virus in air flowing inside a winding conduit equipped with 280 nm deep UV-LEDs

Environment International, 2022
A general-purpose virus inactivation unit that can inactivate viruses was developed using deep ultraviolet (DUV) LEDs that emit DUV rays with a wavelength of 280 nm.
Kotaro Takamure, Yasuaki Sakamoto, Yasumasa Iwatani, Hiroshi Amano, Tetsuya Yagi, Tomomi Uchiyama   +5 more
doaj   +1 more source

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

High-Efficiency and High-Reliability Deep-UV Light-Emitting Diodes Using Transparent Ni-Implanted AlN Ohmic Electrodes

IEEE Access, 2021
Significant efforts have been devoted to improve the external quantum efficiency (EQE) of AlGaN-based top-emitting deep-UV light-emitting diodes (DUV LEDs).
Tae Hoon Park, Kyung Rock Son, Hideki Hirayama, Tae Geun Kim   +3 more
doaj   +1 more source

Strain-stress study of AlxGa1-xN/AlN heterostructures on c-plane sapphire and related optical properties [PDF]

, 2019
This work presents a systematic study of stress and strain of AlxGa1-xN/AlN with composition ranging from GaN to AlN, grown on a c-plane sapphire by metal-organic chemical vapor deposition, using synchrotron radiation high-resolution X-ray diffraction ...
Chung, T. F., Dong, Y., Feng, Y., Ferguson, I. T., Kucukgok, B., Lu, N., Saravade, V., Zhou, H.   +7 more
core   +3 more sources

Simulation and theoretical study of AlGaN-based deep-ultraviolet light-emitting diodes with a stepped electron barrier layer

AIP Advances, 2022
Owing to the COVID-19 outbreak, sterilization of deep-ultraviolet light-emitting diodes (DUV LEDs) has attracted increasing attention. Effectively improving the radiative recombination efficiency and mitigating the efficiency degradation, mainly caused ...
Fengyi Zhao, Wei Jia, Hailiang Dong, Zhigang Jia, Tianbao Li, Chunyan Yu, Zhuxia Zhang, Bingshe Xu   +7 more
doaj   +1 more source

Detection of Noble Gas Scintillation Light with Large Area Avalanche Photodiodes (LAAPDs)

, 2004
Large Area Avalanche Photodiodes (LAAPDs) were used for a series of systematic measurements of the scintillation light in Ar, Kr, and Xe gas. Absolute quantum efficiencies are derived.
A. Rubbia, Aprile, Belogurov, Benetti, Bressi, Carvalho, Doke, Hurst, Karar, M. Messina, Miyajima, Moerman, Platzman, R. Chandrasekharan, Suzuki, Thomas   +15 more
core   +1 more source