fig3
Figure 3. Temperature-dependent photoluminescence spectra for MAPbI3 and FAPbI3. (A) Color plots of normalized PL spectra for MAPbI3-based perovskites at different temperatures from 110 to 300 K; (B) The corresponding excitonic peak positions of MAPbI3-based perovskites; (C) Color plots of normalized PL spectra for FAPbI3-based perovskites at varying temperatures from 50 to 290 K; (D) The corresponding excitonic peak position of the FAPbI3-based perovskites. PL: Photoluminescence.
