Results 51 to 60 of about 4,707 (158)

Junction and carrier temperature measurements in deep-ultraviolet light-emitting diodes using three different methods

, 2018
The junction temperature of AlGaN ultraviolet light-emitting diodes emitting at 295 nm is measured by using the temperature coefficients of the diode forward voltage and emission peak energy.
Kim, JK, Gessmann, T, Allerman, AA, Schubert, EF, Fischer, AJ, Xi, JQ, Bogart, KHA, Xi, Y, Crawford, MH, Shah, JM   +9 more
core   +1 more source

General analysis of type I second-harmonic generation with elliptical Gaussian beams

, 1997
One can enhance second-harmonic generation in angle-tuned crystals by focusing the fundamental to an elliptical waist in the crystal. We present a general analysis for type I phase-matched uniaxial and biaxial crystals that will find particular ...
Walz, Jochen, Leibfried, Dietrich, Freegarde, Tim, Coutts, Julian, Hansch, T.W.   +4 more
core  

Tuning photonic crystal fabrication by nanosphere lithography and surface treatment of AlGaN-based ultraviolet light-emitting diodes

, 2018
Tuning photonic crystal fabrication by nanosphere lithography and surface treatment of AlGaN-based ultraviolet light-emitting ...
Chee, Kuan W. A., Guo, Wei, Chen, Yue-e, Wang, John R., Ye, Jichun, Wang, Yong   +5 more
core   +1 more source

The impacts of optical radiation in the environment on skin: Hazards, measurement, regulation and protection

, 2006
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.From 2001 to 2005, work was conducted at the Photobiology Unit at Ninewells Hospital in Dundee to examine the optical radiation environment and its ...
Oliver, Hannah Elizabeth
core  

Ultraviolet-B Resonant-Cavity Light-Emitting Diodes with Tunnel Junctions and Dielectric Mirrors [Elektronisk resurs]

We demonstrate the first electrically injected AlGaN-based ultraviolet-B resonant-cavity light-emitting diode (RCLED). The devices feature dielectric SiO2/HfO2 distributed Bragg reflectors enabled by tunnel junctions (TJs) for lateral current spreading ...
Torres, Estrella,, Guttmann, Martin,, Bergmann, Michael Alexander,, Höpfner, Jakob,, Kneissl, Michael,, Grigoletto, Massimo,, Graupeter, Sarina,, Haglund, Åsa,, Ciers, Joachim,, Kolbe, Tim,, Wernicke, Tim,   +10 more
core   +1 more source

Synthesis and luminescence properties of the red phosphor CaZrO3:Eu3+ for white light-emitting diode application

, 2011
Eu3+-doped CaZrO3 phosphor with perovskite-type structure was synthesized by the high temperature solid-state method. The samples were characterized by X-ray diffraction, scanning electron microscopy, fluorescence spectrophotometer and UV-vis ...
Yuwei Lan, Junli Huang, Jianhua Sun, Fuzhong Gong, Liya Zhou, Qunliang Li   +5 more
core   +1 more source

Growth and characterization of ultraviolet light emitting diode (UV-LED)

, 2022
Fen Bilimleri Enstitüsü, Fizik Ana Bilim DalıMorötesi bölgede ışık yayan diyotlar, su arıtma, biyolojik analiz, algılama, yüksek optik depolama, beyaz ışık aydınlatma, UV kürleme/kaplama, sterilizasyon gibi birçok alanda kullanılmaktadır.
Bulut, Barış
core  

Deep Ultraviolet Light Emitting Diode Based on Aluminum Gallium Nitride

Highlights in Science, Engineering and Technology
AlGaN-based deep ultraviolet LED has gradually attracted people's attention, because it can be used in sterilization, secret communication and other fields. According to the research report of nearly twenty years, there are still many shortcomings in the external quantum efficiency, internal quantum efficiency and light extraction efficiency of AlGaN ...
openaire   +1 more source

Miniaturized AlGaN-Based Deep-Ultraviolet Light-Emitting and Detecting Diode with Superior Light-Responsive Characteristics

The progressive downscaling of silicon-based microelectronic devices delivers compact and advanced integrated circuits for fast data processing and computing. Similarly, the miniaturization of conventional optoelectronics is also an important frontier of
Ooi, Boon S., Liu, Sheng, Yu, Huabin, Zheng, Jinjian, Wang, Rui, Xiao, Shudan, Li, Shuiqing, Luo, Yuanmin, Wang, Danhao, Yao, Jikai, Li, Dong, Memon, Muhammad Hunain, Zhang, Jiangyong, Shen, Chao, Sun, Haiding, Gao, Zhixiang   +15 more
core   +1 more source

Bactericidal effects of deep ultraviolet light-emitting diode for solutions during intravenous infusion. [PDF]

Int J Med Sci, 2018
Omotani S, Tani K, Aoe M, Esaki S, Nagai K, Hatsuda Y, Mukai J, Teramachi H, Myotoku M.   +8 more
europepmc   +1 more source