Characterization of structural transitions and lattice dynamics of hybrid organic–inorganic perovskite CH3NH3PbI3

Characterization of structural transitions and lattice dynamics of hybrid organic–inorganic perovskite CH₃NH₃PbI₃

Jin Feng¹, Ji Jian-Ting², Xie Chao³, Wang Yi-Meng¹, He Shu-Na¹, Zhang Lei⁴, Yang Zhao-Rong⁴, Yan Feng³, Zhang Qing-Ming^{2, 5, †}

Crystal structures of CH₃NH₃PbI₃ in the (a) orthorhombic, (b) tetragonal, and (c) cubic phases. The left and right panels are viewed from the 〈 100 〉 and 〈 001 〉 directions, respectively. The powder XRD patterns and final Rietveld refinement profiles for CH₃NH₃PbI₃ in the (d) orthorhombic (100 K), (e) tetragonal (300 K), and (f) cubic (350 K) phases.