Solar energy breaks through the quantum efficiency barrier

PhysOrg.com reports that researchers have broken through the quantum efficiency barrier,  a measure of how efficient solar panels are at absorbing light and turning the photons into electricity:

Researchers from the National Renewable Energy Laboratory (NREL) have reported the first solar cell that produces a photocurrent that has an external quantum efficiency greater than 100 percent when photoexcited with photons from the high energy region of the solar spectrum.

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And when that electricity gets captured, researchers may also have a good copper battery to store that energy.

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