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A specially designed photovoltaic cell could generate up to 50 watts of power per square meter under ideal conditions at night, about a quarter of what a conventional solar panel can generate in daytime. It’s similar to how normal solar cells work, but in reverse. Hot objects compared to their surroundings will radiate heat as infrared light. A conventional solar cell is cool compared to the sun, so it absorbs light. Professor Jeremy Munday at UC Davis is developing prototypes of these nighttime solar cells. Let’s wish him luck!
https://www.sciencedaily.com/releases/2020/01/200129174512.htm
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