Improved Efficiency of non-toxic Cu3BiS3 Thin Film Solar Cell Employing PCBM Electron Transport Layer

Sandip Das Department of Electrical and Computer Engineering, Kennesaw State University, Marietta, GA, United States

In this work, design and numerical simulation results on a new thin-film solar cell structure using an emerging photovoltaic absorber material – Cu3BiS3, is reported. A new structure with PCBM as the electron transport layer (ETL) exhibited significantly improved power conversion efficiency (PCE) of 11.13% in comparison to a standard reference cell with n-type CdS layer showing only 6.94% efficiency. The improved cell with the configuration of SLG/Mo/Cu3BiS3/PCBM/Al showed a high open-circuit voltage (Voc) of 0.627 V, a short-circuit current density (Jsc) of 23.08 mA/cm2, and a fill factor (FF) of 77%. Our results show high potential of Cu3BiS3 to realize efficient, non-toxic, low-cost solar cells.