Figure 2

Differential scanning calorimetry (DSC) and thermogravi-metric analysis (TGA) of CH3NH3PbBr3 (inset: color changes of CH3NH3PbBr3 single crystal according to the temperature).

Differential scanning calorimetry (DSC) and thermogravi-metric analysis (TGA) of CH3NH3PbBr3 (inset: color changes of CH3NH3PbBr3 single crystal according to the temperature).