Fabrication and Characterization of Multijunction Solar Cell of Cu/Cu2O/ZnO/FTO Via Spray Pyrolysis Technique

Photovoltaic cells made of silicon and germanium, which are currently in use, eliminate fuel transport and storage issues but are hindered by the current cost of the materials and fabrication. The spray pyrolysis technique was employed to fabricate and characterize multijunction solar cell due to its simplicity, reproducibility, and economic factors. Current-voltage characteristics indicated an increase in current and efficiency when a current collection grid was used. The fabricated tandem solar cell showed an open voltage of 720 mV, a short circuit of 3.25 mA, a fill factor FF of 0.68, a maximum power of 1.61 , and a conversion efficiency of 1.57%. Based on the findings, it can be concluded that the fabrication process and characterization techniques employed in this study resulted in the successful development of a tandem solar cell with enhanced performance. The use of ZnO-Mg films contributed to improved absorption coefficient and energy band gap, leading to higher efficiency.