Impurities in Chalcopyrite Photovoltaics: Changing the perception from an absolute to a relative and cost efficiency perspectiveAuthors Hinrichs, Volker; Handke, Volker; Köhler, Tristan; Chikhaoui, Liliana; Lux-Steiner, Martha C. Source information TitleImpurities in Chalcopyrite Photovoltaics: Changing the perception from an absolute to a relative and cost efficiency perspectiveYear of publication2015Document typeGrey Literature/Report