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Cu2ZnSn(S,Se)4 thin films and solar cells are prepared by sulfurization of the precursors evaporated from Cu2ZnSnSe4 compound and their properties are investigated. Each materials of Cu2ZnSnSe4, Zn + Sn + Se, and NaF + Se are sequentially evaporated on Mo/soda lime glass substrate. The substrate temperature of Zn + Sn + Se evaporation is changed from 300 to 550 °C. These precursors are crystallized...