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Experimental device generates electricity from the coldness of the universe

A drawback of solar panels is that they require sunlight to generate electricity. Some have observed that for a device on Earth facing space, the chilling outflow of energy from the device can be harvested using the same kind of optoelectronic physics we have used to harness solar energy. New work looks to provide a potential path to generating electricity like solar cells but that can power electronics at night.

from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2019/05/190506163646.htm
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