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Stacking the deck: A way to double the efficiency of solar cells is about to go mainstream

from The Economist

From Feb. 25: Sunlight is free, but that is no reason to waste it. Yet even the best silicon solar cells — by far the most common sort — convert only a quarter of the light that falls on them. Silicon has the merit of being cheap: manufacturing improvements have brought its price to a point where it is snapping at the heels of fossil fuels. But many scientists would like to replace it with something fundamentally better. more

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