Enhancing the stoichiometry of sequentially electrodeposited CZTS thin films

Abstract

Copper zinc tin sulfide (CZTS) is a promising chalcogenide semiconductor which has received increasing interest in the last two decades for applications in solar cells. It offers favorable optical and electronic properties similar to CIGS (copper indium gallium selenide) making it well suited for use as a thin-film solar cell absorber layer. CZTS solar cells have a more than promising alternative, with a band gap of about 1.5eV and an absorption coefficient of the order of 104 cm-1 [1]. Moreover, all elements of this quaternary material are non-toxic [2], and not very expensive.