Funct. Mater. 2026; 33 (2): 246-255.

This study investigates the performance of a non-fullerene thin-film organic solar cell (TFOSC) with the device configuration FTO/PDINO/PBDB-T:ITIC/CFTS/Al using numerical simulations. The Solar Cell Capacitance Simulator (SCAPS-1D) software was employed to model the device, focusing on the impact of CFTS kesterite as a hole transport layer (HTL) as an alternative to conventional materials. The simulations were conducted under AM 1.5G illumination, and the temperature dependence of key performance parameters was analyzed within the range of 273K to 373K. The simulation results demonstrate the viability of CFTS as an effective HTL in TFOSCs. The influence of temperature on photovoltaic performance parameters, as well as on charge transport and recombination dynamics within the device, is discussed. This study provides valuable insights into the potential of CFTS to contribute to the development of high-performance and thermally stable TFOSCs, offering a pathway towards more sustainable and efficient solar energy technologies. The findings highlight the importance of materials selection and device simulation in optimizing TFOSC performance.