Enhancement of the performance of CdS/CdTe heterojunction solar cell using TiO2/ZnO bi-layer ARC and V2O5 BSF layers: A simulation approach

Abstract

This article presents the role of Bi-layer anti-reflection coating (ARC) of TiO2 /ZnO and back surface field (BSF) of V2 O5 for improving the photovoltaic performance of Cadmium Sulfide (CdS) and Cadmium Telluride (CdTe) based heterojunction solar cells (HJSCs). The simulation was performed at different concentrations, thickness, defect densities of each active materials and working temperatures to optimize the most excellent structure and working conditions for achieving the highest cell performance using obtained optical and electrical parameters value from the experimental investigation on spin-coated CdS, CdTe, ZnO, TiO2 and V2 O5 thin films deposited on the glass substrate. The simulation results reveal that the designed CdS/CdTe based heterojunction cell offers the highest efficiency, η of ∼25% with an enhanced open-circuit voltage, V oc of 0.811 V, short circuit current density, J sc of 38.51 mA cm−2 , fill factor, FF of 80% with bi-layer ARC and BSF. Moreover, it appears that the TiO2 /ZnO bi-layer ARC, as well as ETL and V2 O5 as BSF, could be highly promising materials of choice for CdS/CdTe based heterojunction solar cell.