Figure 5

13C and 207Pb chemical shifts in CH3NH3PbBr3 as a function of temperature (inset: 13C and 207Pb MAS NMR spectrum of CH3NH3PbBr3 at 300 K).

13C and 207Pb chemical shifts in CH3NH3PbBr3 as a function of temperature (inset: 13C and 207Pb MAS NMR spectrum of CH3NH3PbBr3 at 300 K).