04 Dec '17, 4pm

Solar windows switch between tinted and transparent

Solar windows switch between tinted and transparent

A new addition into the solar window space is taking things in a different direction. Instead of solely focusing on transparency, new solar windows developed by scientists at NREL are made to be both efficient solar cells and windows, but not at the same time. The solar switch windows darken when sunlight hits them, absorbing the light and producing electricity, but when the sunlight dims, they switch back into being normal transparent windows. “There is a fundamental tradeoff between a good window and a good solar cell,” said Lance Wheeler, a scientist at NREL . “This technology bypasses that. We have a good solar cell when there’s lots of sunshine and we have a good window when there’s not.” When the windows are darkened, they only let in 3 percent of the solar spectrum, whereas when they're transparent, or in their so-called bleached state, they let in 68 percent. The e...

Full article: https://www.treehugger.com/solar-technology/solar-windows...

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