A Numerical Simulation Study Investigating the Functionality of a Perovskite Solar Cell Based on FASnI3 in Both Conventional and Inverted Configurations Using Compatible Zn(O0.3S0.7) As the Electron Transport Layer. East Eur. J. Phys. 2026, No. 2, 292-301. https://doi.org/10.26565/2312-4334-2026-2-31.