Halide-Engineered Multifunctionality in Lead-Free Cs2AlTlX6 (X = I, F) Double Perovskites: A First-Principles Study of Structural, Optoelectronic, Elastic, and Thermoelectric Properties. Physical Education, Health and Social Sciences, [S. l.], v. 4, n. 1, p. 932–947, 2026. DOI: 10.63163/jpehss.v4i1.1271. Disponível em: https://journal-of-social-education.org/index.php/Jorunal/article/view/1271. Acesso em: 6 may. 2026.