Investigations of Lead Free Halides in Sodium Based Double Perovskites Cs2NaBiX6(X=Cl, Br, I): an Ab Intio Study. East Eur. J. Phys. [Internet]. 2021 Sep. 28 [cited 2026 Oct. 24];(3):74-80. Available from: https://periodicals.karazin.ua/eejp/article/view/17752