Abstract
In the past decades the metal halide perovskites gained tremendous attention from researchers because of its excellent visible light absorption and promising power conversion efficiencies. But due its toxic nature and concerned ecological hazards it can’t be commercialized on a large scale. So there was a need to introduce a new toxic free alternative. According to this paper a volume lead free perovskite structure is quantitative investigated using SCAPS (1−D) software. A new approach is used in which The lead-free active layer CH3NH3SnI3 is encased in two bilayers of a simultaneous simulation that investigates the hole transport layer (HTL) and electron transport layer (ETL) and fine-tunes their respective thicknesses as well as the absorber layer to attain the best possible performance for the suggested structure. Furthermore, a number of parameters influencing electrical properties were studied statistically, including the effect of different rear connections, temperature changes, doping concentration in the absorber layer, defect states at interfaces, and the overall density of defects. The optimal configuration yielded an open circuit voltage (Voc) of 0.96V, a short circuit current density (Jsc) of 32mA/cm2, a Fill Factor of 82.02, and a power conversion efficiency of 26.09% under standard AM1.5 G conditions.
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