Modeling and simulation of CZTS based solar cells with ZnO buffer layer

In this study, a thin-film solar cell structure based on Cu۲ZnSnS۴ (CZTS) as the absorber layer, ZnO as the buffer layer, and Al-doped ZnO (ZnO:Al) as the window layer was simulated using the SCAPS-۱D software. The simulation aimed to investigate the influence of key parameters such as the thickness of the CZTS and ZnO layers, as well as defect densities, on the overall device performance. The solar spectrum AM۱.۵G and standard operating conditions were applied. The results demonstrate that optimizing the thickness of the absorber and buffer layers, along with minimizing the defect density at the interfaces and within the CZTS layer, significantly improves the open-circuit voltage (Voc), short-circuit current density (Jsc), fill factor (FF), and power conversion efficiency (PCE). The proposed structure shows promise as a cost-effective and environmentally friendly alternative to conventional thin-film photovoltaic technologies.

کلیدواژه ها:

SCAPS-۱D ، Solar cell ، CZTS absorber layer ، ZnO buffer layer