We may have a powerful new weapon in the war against Covid-19, as a scientific breakthrough has paved the way for personal, handheld devices that emit high-intensity ultraviolet (UV) light capable of killing the coronavirus.

Chemical or UV exposure are the most common methods of sanitizing and disinfecting surfaces from bacteria and viruses. In the latter case, there need to be sufficiently high levels of UV radiation – 200 to 300 nanometers – to kill the unwanted bugs.

Such devices do exist at present, but are prohibitively expensive, use discharge lamps that contain mercury, are bulky and short-lived, and require a large amount of power to function. Not exactly ideal for scaling up to rid the world of Covid-19.

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However, using theoretical modeling of a range of materials, researchers at Penn State, the University of Minnesota and two Japanese universities believe they have found the holy grail of transparent conductors, which could allow for cheap, easy-to-produce LEDs that emit UV light at a high enough intensity to kill coronavirus.

Computer, smartphone and lighting manufacturers have often grappled with finding transparent electrode materials that function in the visible light spectrum, let alone the ultraviolet spectrum. But the researchers have settled on a substance called strontium niobate as the potential game-changer material. (RT)