Effect of Cu2O Back Surface Field on the Efficiency Enhancement of CZTSe Kesterite Photovoltaic Cell

Abstract

[EN] The earth abundant materiel Cu2ZnSnSe4 (CZTSe) is a promising quaternary semiconductor compound having kesterite symmetrical structure. CZTSe is considered as suitable absorber material for photovoltaic cell applications due to its optimum direct band gap. Cu2O/CZTSe/CdS/ZnO photovoltaic solar cell is proposed in this paper. Numerical modeling and analysis of the proposed cell is performed by using Solar Cell Capacitance Simulator (SCAPS). To analyze the effects on the cell performance different physical parameters are varied such as the thickness of the buffer and absorber layers and their carrier densities. Under 1.5 AM illumination condition, the proposed cell shows promising results and had achieved power conversion efficiency (PCE) of 25.95%, fill factor (FF) 85.24%, short circuit current (J(sc)) 31.41 mA/cm(2) and (V-oc) 0.97 V.