26 February 2016 Deep ultraviolet light-emitting and laser diodes
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Abstract
Nearly 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) and DUV LED Lamps and Laser Diodes over Sapphire and AlN substrates. In this paper, we review the current research focus and the latest device results. In addition to the current results we also discuss a new quasipseudomorphic device design approach. This approach which is much easier to integrate in a commercial production setting was successfully used to demonstrate UVC devices on Sapphire substrates with performance levels equal to or better than the conventional relaxed device designs.
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Asif Khan, Asif Khan, Fatima Asif, Fatima Asif, Sakib Muhtadi, Sakib Muhtadi, "Deep ultraviolet light-emitting and laser diodes", Proc. SPIE 9748, Gallium Nitride Materials and Devices XI, 97481J (26 February 2016); doi: 10.1117/12.2217738; https://doi.org/10.1117/12.2217738
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