Peculiarities of CsPbBr3 perovskites melting in quasi-equilibrium conditions

The melting behavior of CsPbBr3 perovskite was studied by differential thermal analysis (DTA). It was found that \nmelting of CsPbBr3 occurs non-isothermally in the temperature range of 561-570 °C. From the temperature dependence \nof the solid-phase melting rate, it was established that at 567±1 °C the change in the mechanism of the solid-phase \nmelting goes from fragmentation to dissolution at the surface. The obtained values of the activation energy of the melting \nof the solid phase in CsPbBr3 show that the activation energy of the dissolution of the solid-phase fragments is 4 times \ngreater than the energy of the fragmentation of the solid phase.