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, †}

(a) Temperature-dependent Raman spectra of MAPbI₃. Inset shows the temperature dependence of the linewidth of the P1, P2, and P4 modes. (b) Temperature dependence of the frequencies of the observed phonon modes. The black line is the fitting curve using the inharmonic phonon decay model.^[26]