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| Keywords: PVeff(rev150427)a.jpg en Conversion efficiencies of best research solar cells worldwide from 1976 through 2015 for various photovoltaic technologies Efficiencies determined by certified agencies/laboratories 2015-04-27 06 23 17 National Renewable Energy Laboratory NREL Golden CO Greg Wilson and Keith Emery other versions PD-USGov Uploaded with UploadWizard Uncategorized 2015 April 27 | ||||
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