First-Principles investigation of the Electronic and Optical Properties of Cs-Doped FAPbI3 Halide Perovskite Solar Cell. J. Innov. Res. [Internet]. 2025 May 19 [cited 2026 Apr. 21];3(2):55-63. Available from: https://e-pallipublishers.com/index.php/jir/article/view/4468