CZTS A preparation method of solar cell using ZnS buffer layer

摘要

The present invention relates to a method of manufacturing a CZTS thin film solar cell in which a zinc sulfide buffer layer is applied to a back electrode, more specifically, a zinc sulfide buffer layer is introduced between a back electrode and a metal precursor layer to form a light absorption layer, The present invention relates to a thin film solar cell having improved light conversion efficiency and cell characteristics through interface control of a thin film solar cell and a method of manufacturing the same. The method of manufacturing a thin film solar cell according to the present invention can form a zinc sulfide buffer layer between a back electrode and a metal precursor layer to reduce a void generated at an interface, thereby providing a more uniform and dense thin film, (Cu, Zn, Sn) and Group VI elements (Se, S) from being diffused into the molybdenum back electrode by improving the electrical bonding between the light absorbing layer and the rear electrode.