Abstract In this study, copper bismuth oxide (CuBi 2 O 4 ) absorber-based thin film heterojunction solar cell structure consisting of Al/FTO/CdS/CuBi /Ni has been proposed. The proposed device modeled and analyzed by using the capacitance simulator in one dimension (SCAPS-1D) software program. performance photovoltaic is evaluated numerically varying thickness, doping concentrations, defect den...