Machine Learning-Driven SCAPS Modeling for Optimizing CH<sub>3</sub>NH<sub>3</sub>SnBr<sub>3</sub> Perovskite Solar Cells: Analytical Insights into Materials for Hole Transport and the Active Layer
Avijit Ghosh, Mahbuba Moumita, Md Aliahsan Bappy, Nondon Lal Dey, Md. Aktarujjaman, Md Majadul Islam Jim, Nasser S. Awwad, Hala A. Ibrahium
Abstract
This work explores the potential for integrating organic compounds, which serve as absorbers, with HTL to achieve steady, efficient PSCs. This study’s proposed architecture is made up of ETL, HTL, and a CH 3 NH 3 SnBr 3 absorber. The effect of thickness, doping, and defect densities of absorber, HTL, and ETL layers and interface defect densities on a solar device’s output is investigated utilizing the SCAPS-1D model. The FTO/SnS 2 /CH 3 NH 3 SnBr 3 /Ni structure has a V OC of 0.991 V, a J SC of 28.796 mA cm –2, a PCE of 23.88%, and an FF of 83.69%. Concerns about stability, rapid oxidation of Sn 2+ to Sn 4+, and high defect density limit the efficiency of CH 3 NH 3 SnBr 3 -based solar cells. The FTO/SnS 2 /CH 3 NH 3 SnBr 3 /HTL/Ni structure is investigated to prevent Sn oxidation, increase stability, and improve charge transport for improved performance. The analyzed structure is integrated with BiI 3 /SnS/WSe 2 /PTAA/CuS/CuI/C 6 TBTAPH 2 /CBTS layers as an HTL, resulting in a maximum V OC of 1.128 V, a J SC of 34.014 mA cm –2, a PCE of 33.70%, and an FF of 87.83% with the FTO/SnS 2 /CH 3 NH 3 SnBr 3 /CBTS/Ni structure. The performance matrix of the investigated best optimum solar cell was predicted by ML with an accuracy rate of roughly 83.75%. This study’s useful design and important discoveries could result in the creation of an inexpensive CH 3 NH 3 SnBr 3 thin-film solar cell.