NREL scientists are developing windows that can generate electricity and provide their own shade

Glass that darkens when exposed to sunlight is nothing new, but scientists at the National Renewable Energy Laboratory in Golden have developed a product that not only darkens but can generate electricity. Scientist Lance Wheeler was experimenting using gas molecules that move through an absorbent layer of glass that acts as a solar power cell when he placed the glass on a hot plate to dry after treating it with methylamine gas.

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