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File:PVeff(rev111205).jpg

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English: Conversion efficiencies of the best research solar cells worldwide from 1976 through 2011 for various photovoltaic technologies; efficiencies determined by certified agencies/laboratories.
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Source National Renewable Energy Laboratory (NREL), Golden, CO
Author L. L. Kazmerski

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Public domain This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

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current18:45, 5 December 2011Thumbnail for version as of 18:45, 5 December 20113,716 × 2,424 (3.44 MB)Dgwinner (talk | contribs)

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