First-Principles Calculations of Novel Lead-Free X2GeSnI6 (X = Rb, Cs) Double Perovskite Compounds for Optoelectronic and Energy ExploitationsMalak Azmat Ali, Muhammad Faizan, Ammar M. Tighezza et al.|Journal of Inorganic and Organometallic Polymers and Materials|2023Cited by 55