Speaker
Description
Lead-free perovskite solar cells (PSCs) have propelled to the forefront of research due to their impressive performance in solar cell applications and their non-toxicity compared to lead-based PSCs. In this study, a heterojunction PSC with the configuration FTO/C-60/CS2TiCl6/CS2AgBiBr6/WSe2/Au was simulated using the SCAP-1D simulation software, combining single and double PSCs. The lead-free single perovskite CS2TiCl3 and the double perovskite CS2AgBiBr6 served as the light absorber, while C-60 and WSe2 served as the electron and hole transport layers, respectively. Optimization of the simulated PSCs was carried out by varying the thicknesses of the hole and electron transport layers, the light absorbers, the acceptor dopant density (ADD) of the HTL and perovskite layer, the donor dopant density (DDD) of the ETL, temperature, and the series and shunt resistances. A PCE of 28.17 %, along with a fill factor (FF) of 91.03 %, short circuit current (Jsc) of 21.67 mA/cm-2, and Open circuit voltage (Voc) of 1.4285 V were obtained post optimization. The PCE obtained exceeded the highest reported values for CS2TiCl6 and CS2AgBiBr6-based single- or heterojunction PSCs, demonstrating the tremendous potential of multiple absorber layers in advancing highly efficient, non-toxic future PSCs.
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