Results 241 to 250 of about 5,958,454 (264)

Deep ultraviolet light-emitting diodes and photodetectors for UV communications

SPIE Proceedings, 2005
We present deep UV light-emitting diodes and photodetectors based on high Al-composition AlGaN. We have obtained very short wavelength UV LEDs (
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Large Chip High Power Deep Ultraviolet Light-Emitting Diodes

Applied Physics Express, 2010
Single chip deep ultraviolet light-emitting diodes with junction area up to 1 mm2 were fabricated for high power applications. Lateral geometry devices were designed for low operating voltage, uniform current spreading and emission resulting in substantial improvement of high current performance. The maximum CW optical power of 30 and 6 mW was achieved
Max Shatalov, Wenhong Sun, Yuri Bilenko, Ajay Sattu, Xuhong Hu, Jianyu Deng, Jinwei Yang, Michael Shur, Craig Moe, Michael Wraback, Remis Gaska   +10 more
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Reliability issues in AlGaN based deep ultraviolet light emitting diodes

2009 IEEE International Reliability Physics Symposium, 2009
AlGaN based deep ultraviolet light emitting diodes (DUV LEDs) are key components in systems for air, water, and food purification and germicidal applications. Because of the heteroepitaxial growth of the DUV LED epilayers on sapphire, they have a large number of dislocations that invariably leads to a reduction of quantum efficiency and lifetime ...
Asif Khan, Seongmo Hwang, Jonathan Lowder, Vinod Adivarahan, Qhalid Fareed   +4 more
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AlGaN-based deep ultraviolet light emitting diodes with reflection layer

SPIE Proceedings, 2007
ABSTRACT We report on the effect of reflection layer on electrical and optical characteristics of AlGaN-based multiple-quantum well deep-UV flip chip light-emitting diodes. Relatively thick Al metal as a reflector layer was deposited on the p-contact of deep-UV LEDs by e-beam evaporat or at a nominal chamber pressure of 2 u 10 -6 mtorr.
M. Khizar, Yaskin M. Akhtar Raja
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AlGaN Polarized Ultrathin Tunneling Junction Deep Ultraviolet Light-Emitting Diodes

Nano Letters
Deep ultraviolet light-emitting diodes (DUV-LEDs) are hindered by optical losses and high operating voltages, primarily due to p-contact layers such as light absorption in p-GaN or high operating voltages linked to inferior hole injection caused by high acceptor ionization energy for p-AlGaN and large bulk resistance in AlGaN-based tunneling junctions (
Ziqi Zhang, Shengjun Zhou, Zhefu Liao, Jingjing Jiang, Hansong Geng, Zhenxing Lv, Xu Liu, Shengli Qi, Sheng Liu   +8 more
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Microbicidal effect of deep ultraviolet light-emitting diode irradiation

Lasers in Medical Science, 2020
Tatsuya Takagi, Jun Nishikawa, Masashi Yanagihara, Soichiro Fukuda, Naoto Kubota, Yuki Kobayashi, Ken-ichiro Otsuyama, Junzo Nojima, Hidehiro Tsuneoka, Kohei Sakai, Yutaka Suehiro, Takahiro Yamasaki, Kenji Sakurai, Kazuki Itatani, Isao Sakaida   +14 more
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Deep Ultraviolet Light Emitting Diodes with Emission below 300 nm

MRS Proceedings, 2005
AbstractIn this paper we will describe the problems in growth and fabrication of deep UV LED devices and the approaches that we have used to grow AlGaN-based multiple quantum well deep UV LED structures and to overcome issues of doping efficiency, cracking, and slow growth rates both for the n- and the p-type layers of the device structures.
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Deep Ultraviolet Light-Emitting Diode Light Therapy for Fusobacterium nucleatum

Microorganisms, 2021
Jun Nishikawa, Takahiro Yamasaki, Shunsuke Itô   +2 more
exaly  

Deep Ultraviolet Light-Emitting Diodes

2011
Michael Shur, Max Shatalov, Alex Dobrinsky, Remis Gaska   +3 more
openaire   +1 more source

Effect of ultraviolet light-emitting diode processing on fruit and vegetable-based liquid foods: A review

Frontiers in Nutrition, 2022
Fernando Salazar
exaly