Microbe-killing short-wavelength UV radiation produced by LEDs

Physics World  June 16, 2020 Researchers in Germany have developed a prototype device that incorporates emerging LED technology. It features an array of 118 LEDs spread over an area of 64 cm2 and emitting UV light at a wavelength of around 230 nm. The setup delivered a maximum irradiation power of 0.2 mW/cm2 over an area of 36 cm2, with 90% uniformity. They assess the performance of their device using tissue samples of both skin and mucous membrane to determine the extent of damage to DNA caused by varying doses of light and compare the pathogen-killing effectiveness of the radiation […]