Chowdhury , O., & Bhowmik , U. (2026). Design and Optimization of Lead-Free Chalcogenide Perovskite Solar Cells: 30.64% Efficiency with MgHfS₃ Absorber. SciEn Conference Series: Engineering, 4, 68-72. https://doi.org/10.38032/scse.2026.4.40