40% efficient solar cell developed

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The U.S. Department of Energy has announced a new solar cell that can convert more than 40% of sunlight into electricity. The cell, made by Boeing-Spectrolab, uses mirrors and prisms to boost the sunlight going into the cell. The DOE says the cells could be sold for $3 per watt and make electricity for 8 to 10 cents per KW/hour.

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