Results 11 to 20 of about 4,806,914 (197)

Maximizing the Light Extraction Efficiency for AlGaN-Based DUV-LEDs with Two Optimally Designed Surface Structures under the Guidance of PSO

Crystals, 2022
A novel method of utilizing an intelligent algorithm to guide the light extraction surface structure designing process for deep-ultraviolet light emitting diodes (DUV-LEDs) is proposed and investigated.
Zizheng Li, Huimin Lu, Jianping Wang, Yifan Zhu, Tongjun Yu, Yucheng Tian   +5 more
doaj   +4 more sources

High photoluminescence intensity of heterostructure AlGaN-based DUV-LED through uniform carrier distribution [PDF]

Physica Scripta, 2022
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
Moh. Aman, Faris Azim Ahmad Fajri, A. F. A. Noorden, M. Bahadoran, S. Daud, Muhammad Zamzuri Abdul Kadir   +5 more
semanticscholar   +2 more sources

Deep Ultraviolet Light-Emitting Diode Light Therapy for Fusobacterium nucleatum

Microorganisms, 2021
Background: Fusobacterium nucleatum, which is associated with periodontitis and gingivitis, has been detected in colorectal cancer (CRC). Methods: We evaluated the bactericidal effect of deep ultraviolet (DUV) light-emitting diode (LED) light therapy on ...
Soichiro Fukuda, Shunsuke Ito, Jun Nishikawa, Tatsuya Takagi, Naoto Kubota, Ken-ichiro Otsuyama, Hidehiro Tsuneoka, Junzo Nojima, Koji Harada, Katsuaki Mishima, Yutaka Suehiro, Takahiro Yamasaki, Isao Sakaida   +12 more
doaj   +2 more sources

Greatly Enhanced Wall-Plug Efficiency of N-polar AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

IEEE Photonics Journal, 2021
In this work, we numerically investigate the N-polar AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) over the Ga-polar DUV LEDs. The light output power has increased from 7.1 mW of Ga-polar DUV LED to 18.8 mW of N-polar DUV LED at 60 mA ...
Hongchang Tao, Shengrui Xu, Xiaomeng Fan, Jincheng Zhang, Yue Hao   +4 more
doaj   +2 more sources

Low parasitic carrier reservoir of AlGaN-based DUV-LED via controlled-polarization step-graded superlattice electron blocking layer for high luminescence lighting [PDF]

Physica Scripta
Achieving high luminescence intensity of deep-ultraviolet light-emitting diode (DUV-LED) is generally performed through the implementation of electron blocking layer (EBL) on the chip’s epilayers.
Mohammad Amirul Hairol Aman, A. F. Ahmad Noorden, S. Daud, Muhammad Zamzuri Abdul Kadir   +3 more
semanticscholar   +2 more sources

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   +2 more sources

Nearly Efficiency-Droop-Free AlGaN-Based Ultraviolet Light-Emitting Diodes with a Specifically Designed Superlattice p-Type Electron Blocking Layer for High Mg Doping Efficiency

Nanoscale Research Letters, 2018
This work reports a nearly efficiency-droop-free AlGaN-based deep ultraviolet light-emitting diode (DUV LED) emitting in the peak wavelength of 270 nm. The DUV LED utilizes a specifically designed superlattice p-type electron blocking layer (p-EBL).
Zi-Hui Zhang, Sung-Wen Huang Chen, Chunshuang Chu, Kangkai Tian, Mengqian Fang, Yonghui Zhang, Wengang Bi, Hao-Chung Kuo   +7 more
doaj   +2 more sources

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   +2 more sources

Spherical vs. Plane Lenses for Enhanced DUV-LED Performance and Wine Aging

Applied Sciences
The strategic selection of lens geometry—spherical versus plane—decisively shapes the opto-thermal performance boundary of deep ultraviolet light-emitting diodes (DUV-LEDs), thereby governing their efficacy in application-specific photochemical processes.
Jichen Shen, Tianqi Wu, Jun Zou, Peng Wu, Yitao Liao   +4 more
doaj   +2 more sources

Tuning Metamaterials for Applications at DUV Wavelengths [PDF]

International Journal of Optics, 2012
The unique properties of metamaterials, namely, their negative refractive index, permittivity, or permeability, have gained much recent attention. Research into these materials has led to the realization of a host of applications that may be useful to ...
Andrew Estroff, Bruce W. Smith
doaj   +2 more sources