Optimizing CdSe Deposition and Post-Treatment for Enhanced Performance in CdTe Solar Cells

This work focuses on understanding the effect of CdSe layer properties and deposition mechanisms on CdTe-based solar cell performance. In this research, CdSe is deposited using both sputtering and thermal evaporation, with variations in CdSe layer stacks, thicknesses and CdCl2 treatments. It is aimed to explore how different deposition techniques, thicknesses and post-treatments influence the structural, electrical, and optoelectronic properties of the CdSe/CdTe interface, including changes in grain size, recrystallization, carrier lifetime, band bending and recombination mechanisms, and overall efficiency and behavior of CdSe/CdTe solar cells. By systematically altering the process parameters, we investigate the changes in cell performance parameters such as short-circuit current (Jsc), open-circuit voltage (Voc), and fill factor (FF). Through this work, we seek to identify the role of CdSe in enhancing the performance of CdTe-based solar cells, which may pave the potential for further optimization and efficiency improvements in thin-film photovoltaic technology.