Surface stabilized cubic phase of CsPbI<sub>3</sub> and CsPbBr<sub>3</sub> at room temperature

Surface stabilized cubic phase of CsPbI₃ and CsPbBr₃ at room temperature

Yang Feng, Wang Cong, Pan Yuhao, Zhou Xieyu, Kong Xianghua, Ji Wei^‡

Schematic models and thermal stability of bulk CsPbI₃ in cubic and orthorhombic phases. (a) Perspective view of the high temperature cubic phase bulk CsPbI₃. (b)–(d) Side- and top-views of the low temperature orthorhombic phase bulk CsPbI₃. Purple, gray and pink balls represent Cs, Pb and I atoms, respectively. (e) Thermal stability of bulk CsPbI₃ in cubic (orange line) and orthorhombic (green) phases.