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Cheap Solar Cells

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Cheap Solar Cells


Obama's Challenge: Create solar cells that cost as little as paint.

Who's Got a Shot: Dow Chemical recently announced solar roof shingles that use low-cost, thin-film photovoltaic cells and don't require special installation skills. They'll be available by 2011. Ascent Solar Technologies is set to begin shipping highly efficient solar cells made from copper, indium, gallium, and selenium early next year.