Numerical modeling of ZnSnO/CZTS based solar cells

Abstract

Numerical simulation has been performed to improve the performance of Cu₂ZnSnS₄ (CZTS) solar cells by replacing CdS with Zn_1−xSn_xO buffer layer. The influences of thickness, donor concentration and defect density of buffer layers on the performance of CZTS solar cells were investigated. It has been found that Zn_1−xSn_xO buffer layer for Sn content of 0.20 is better for CZTS solar cell. A higher efficiency can be achieved with thinner buffer layer. The optimized solar cell demonstrated a maximum power conversion efficiency of 13%.

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