Analysis of Stable, Environment Friendly and Highly Efficient Perovskite Solar Cell

Highly efficient organo halide perovskite solar cells (PSC) have organic hole transporting material (HTM) and lead based absorber layer. However, organic HTMs are very costly and unstable. Moreover, lead is very toxic and hence harmful to environment. This paper presents a numerical analysis of PSC using SCAPS-1D software with inorganic CuI as HTM, CH3NH3SnI3 as absorber and SnO2 as ETM. The performance of the structure has been analyzed by varying the absorber thickness, dopant density and defect density. The doping density and electron affinity of HTM are also varied to optimize the PSC performance. It is found that absorber with heavy doping (above 1016 cm−3) reduces the efficiency due to enhanced recombination rate. An optimum absorber layer defect density of ∼1014 cm−3 has been identified as well. The final efficiency is found to be 24.22% considering all the optimized parameters. The analysis shown in this paper will be helpful for designing a highly efficient, environment friendly and stable PSC.