Nanostructure Cu2ZnSnS4 thin film prepared by sol-gel for optoelectronic applications

► Thin film of Cu2ZnSnS4 (CZTS) was successfully prepared by sol-gel method. ► Al/n-Si/Cu2ZnSnS4/Al diode exhibits a good rectification behavior. ► Al/n-Si/Cu2ZnSnS4/Al diode can be used as a photosensor for electronic applications.