Impurities in Chalcopyrite Photovoltaics: Changing the perception from an absolute to a relative and cost efficiency perspective Authors Hinrichs, Volker; Handke, Volker; Köhler, Tristan; Chikhaoui, Liliana; Lux-Steiner, Martha C. Source information Title Impurities in Chalcopyrite Photovoltaics: Changing the perception from an absolute to a relative and cost efficiency perspective Year of publication2015 Document typeGrey Literature/Report