Halide-Engineered Multifunctionality in Lead-Free Cs2AlTlX6 (X = I, F) Double Perovskites: A First-Principles Study of Structural, Optoelectronic, Elastic, and Thermoelectric Properties. JPEHSS [Internet]. 2026 Mar. 30 [cited 2026 May 6];4(1):932-47. Available from: https://journal-of-social-education.org/index.php/Jorunal/article/view/1271