Abstract
The lead (Pb) free perovskite solar cells have gained much attention due to non-toxic nature. Owing to a smaller band gap of 1.3 eV, methylammonium tin iodide (III) (MASnI3) can be considered an alternate light absorber layer compare to the lead-based perovskites (MAPbClxI3-x). In this article, MASnI3 based perovskite solar cell has been studied using a 1-D SCAPS simulator. The solar cell structure ITO/TiO2/MASnI3/CuI is simulated in superstrate configuration which achieves a photovoltaic efficiency less than 8 %. Photovoltaic efficiency of the solar cell is further improved to 17.93 % by optimizing thickness and total defect density of the absorber layer. Moreover, the role of defects at the interfaces: TiO2/MASnI3 and MASnI3/CuI on the solar cell performance is also analyzed.
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