Results 171 to 180 of about 3,005 (217)
Some of the next articles are maybe not open access.
Deep ultraviolet light-emitting and laser diodes
SPIE Proceedings, 2016Nearly all the air-water purification/polymer curing systems and bio-medical instruments require 250-300 nm wavelength ultraviolet light for which mercury lamps are primarily used. As a potential replacement for these hazardous mercury lamps, several global research teams are developing AlGaN based Deep Ultraviolet (DUV) light emitting diodes (LEDs ...
Asif Khan, Fatima Asif, Sakib Muhtadi
openaire +1 more source
MgZnO Nanowires Based Deep Ultraviolet Heterojunction Light Emitting Diodes
Journal of Nanoscience and Nanotechnology, 2011Vertically aligned Mg alloyed ZnO nanowires were successfully grown by Chemical Vapor deposition method in a tube furnace. Structural analysis found that the MgZnO nanowires are with single crystalline without phase separations. The atomic ratio of Mg/O in the nanowire was determined to be approximately 15%. Photoluminescence spectra show that the band
Sheng, Chu +3 more
openaire +2 more sources
Applications of Deep Ultraviolet Light Emitting Diodes
2020 IEEE Research and Applications of Photonics in Defense Conference (RAPID), 2020Deep Ultraviolet LEDs have found applications in medicine, air, water and surface sterilization and decontamination, biotechnology, bio-agent detection and identification, radiation hard UV sources, UV curing, and biomedical instrumentation.
openaire +1 more source
Ga2O3-based solar-blind deep ultraviolet light-emitting diodes
Journal of Luminescence, 2020Abstract Vapor cooling condensation system was used to sequentially deposit i-Ga2O3 and n-Ga2O3:Si films on the p-GaN layer that was grown with a metalorganic chemical vapor deposition system. After it was annealed in a nitrogen ambience at 900 °C for 60 min, the p-GaN/i-Ga2O3/n-Ga2O3:Si structure was utilized to fabricate Ga2O3-based p-i-n solar ...
Chih-Hsun Lin, Ching-Ting Lee
openaire +1 more source
Inhomogeneous spectral broadening in deep ultraviolet light emitting diodes
Physics and Simulation of Optoelectronic Devices XXVII, 2019We investigate the spectral broadening in deep ultraviolet (UV) multi quantum well light emitting diodes (LED) by modeling the emission spectra. Experimental emission spectra of deep UV LEDs exhibit a at tail towards lower energies and a steep decrease towards high energies that cannot be explained by convolution of the spectrum with a broadening ...
Norman Susilo +5 more
openaire +1 more source
AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes
2017222–351 nm AlGaN-based deep-ultraviolet (DUV) light-emitting diodes (LEDs) are demonstrated, which have been achieved by the development of crystal growth techniques for wide-bandgap AlN and AlGaN. Significant increases in internal quantum efficiency (IQE) have been achieved for AlGaN quantum well (QW) emissions by introducing low-threading-dislocation
Hideki Hirayama +2 more
openaire +1 more source
Large Chip High Power Deep Ultraviolet Light-Emitting Diodes
Applied Physics Express, 2010Single 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 +10 more
openaire +1 more source
Effect of Inhomogeneous Broadening in Deep Ultraviolet Light Emitting Diodes
2021 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD), 2021Due to their small dimensions deep ultraviolet (DUV) light emitting diodes (LED) are highly attractive light sources for environmental and medical applications. DUV LEDs generate light in active quantum wells (QW) made of Aluminium Gallium Nitride. The QWs are not lattice matched to the substrate and only few monolayers thick making them susceptible to
Friedhard Romer, Bernd Witzigmann
openaire +1 more source
AlGaN nanowire deep ultraviolet light emitting diodes and lasers
2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017Semiconductor lasers operating in the UV-C band (100–280 nm) are important for a broad range of applications including surface treatment, bio-agent detection and the production of microelectronics and integrated circuits. To date, however, it has remained challenging to achieve electrically injected AlGaN quantum well lasers operating in these ...
Zetian Mi, Songrui Zhao, Xianhe Liu
openaire +1 more source
AlGaN nanowire deep ultraviolet light emitting diodes with graphene electrode
Applied Physics Letters, 2022Despite graphene being an attractive transparent conductive electrode for semiconductor deep ultraviolet (UV) light emitting diodes (LEDs), there have been no experimental demonstrations of any kind of semiconductor deep UV LEDs using a graphene electrode.
Heemal Parimoo +4 more
openaire +1 more source