Review
Version 1
Preserved in Portico This version is not peer-reviewed
Electron-Beam Pumped UVC-Emitters Based on (Al, Ga)N Material System
Version 1
: Received: 20 June 2023 / Approved: 20 June 2023 / Online: 20 June 2023 (09:54:31 CEST)
A peer-reviewed article of this Preprint also exists.
Jmerik, V.; Kozlovsky, V.; Wang, X. Electron-Beam-Pumped UVC Emitters Based on an (Al,Ga)N Material System. Nanomaterials 2023, 13, 2080. Jmerik, V.; Kozlovsky, V.; Wang, X. Electron-Beam-Pumped UVC Emitters Based on an (Al,Ga)N Material System. Nanomaterials 2023, 13, 2080.
Abstract
Powerful emitters of the ultraviolet C (UVC) light in the wavelength range of 230-280nm are necessary for the development of effective and safe optical disinfection technologies, high-sensitive optical spectroscopy and non-line-of-sight optical communication. This review considers such UVC-emitters with electron-beam pumping of heterostructures with quantum wells in the (Al,Ga)N material system. The important advantages of these emitters include the absence of the critical problem of p-type doping and the possibility of achieving record (up to several tens of watts for peak values) output optical power values in the UVC range. The review consistently considers about a decade of world experience in the implementation of various UV emitters with various types of thermionic, field-emission, and plasma-cathode electron guns (sources) used to excite various designs of active (light-emitting) regions in heterostructures with quantum wells AlxGa1-xN/AlyGa1-yN (x = 0 − 0.5, y = 0.6 − 1) fabricated either by metal-organic chemical vapor deposition or by plasma-activated molecular beam epitaxy. Special attention is paid to the production of heterostructures with multiple quantum wells/two-dimensional(2D) quantum disks GaN/AlN with a monolayer (1ML ~ 0.25nm) thickness, which ensures a high internal quantum efficiency of radiative recombination in the UVC range, low elastic stresses in heterostructures, and a high output UVC-optical powers.
Keywords
Ultraviolet C emission; electron-beam pumped ultraviolet (UV)C emitters; AlGaN group III-nitrides; low dimensional structures; 2D quantum wells
Subject
Physical Sciences, Optics and Photonics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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