LAUSR

Abstract Solar photovoltaic cell research is always fascinating due to its clean, green nature. Cu2ZnSnS4Se4(CZTSSe)-based solar cells show fruitful performance in the field of power generation models based on sunlight. To improve the efficiency of CZTSSe-based solar cells, overall optimization remains an obstacle. Both thickness and bandgap of the absorber layer and the buffer layer have been optimized. Additionally, the contour plot of thickness vs. bandgap and bandgap vs. bandgap are further analyzed for overall optimization. Using the optimal values of the buffer layer based CZTSSe solar photovoltaic cell the efficiency has been observed as 24.8%. This earth's abundant, non-toxic buffer layer of CZTSSe solar photovoltaic cells could prove to be highly efficient CZTSSe based solar photovoltaic cells experimentally in the future.