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Björn-Arvid Schubert, Björn Marsen, Sonja Cinque, Thomas Unold, Reiner Klenk, Susan Schorr and Hans-Werner Schock Cu2ZnSnS4 thin film solar cells by fast coevaporation Progress in Photovoltaics: Research and Applications 19

Version of Record online: 31 MAY 2010 | DOI: 10.1002/pip.976

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Searching for alternatives not containing indium, the Cu(In,Ga)(S,Se)2 related thin-film material Cu2ZnSnS4 (CZTS) consisting of abundant materials is investigated. Near-stoichiometric single-phased polycrystalline CZTS layers are prepared by a fast coevaporation process under copper-rich growth conditions and subsequent KCN etch which removes the CuS secondary phase. A CZTS/CdS/ZnO solar cell device based on such an absorber layer shows an open-circuit voltage of 541 mV, short-circuit current density of 13.0 mA/cm2, and efficiency of 4.1%.

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