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January 31st, 2011
Capturing More Light with a Single Solar Cell
Abstract:
The most efficient solar cells typically have several layers of semiconductor materials, each tuned to convert different colors of light into electricity. Researchers at Lawrence Berkeley National Lab have now made a single semiconductor that performs almost the same job. More importantly, they made the material using a common manufacturing technique, suggesting it could be made relatively inexpensively.
Much work remains before the Lawrence Berkeley lab material could be used in a practical solar cell, but in theory it could convert nearly half of the energy in sunlight into electricity—three times as much as most single-layer (or single-junction) solar cells. Such a solar cell could also cost less than the layered (or multi-junction) solar cells currently needed to achieve high efficiencies, since it would require only one semiconductor material.
Source:
technologyreview.com
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