Methylammonium lead halide perovskites: Electronic structure and optical properties for tandem solar cellsFatima Oubihi, El Hassan El Harouny, Hanan Ziani, Jamal El Khamkhami, El Mahdi Assaid, Ahmed Lachgar and Abdelfattah AchahbarE3S Web Conf., 704 (2026) 01005DOI: https://doi.org/10.1051/e3sconf/202670401005