Conductivity of CsPbBr3 at ambient conditions

The properties of electrically conductive CsPbBr3 single crystals obtained from the melt have been studied. According to the results of Raman spectra, the covalent bonds in the octahedra [PbBr6](4-) have different strengths in different directions. This bond anisotropy promotes the formation of bromine vacancies located along selected crystallographic directions, which become sites of crystal degradation and the formation of Cs4PbBr6 microformations. A potential barrier at the boundary between the Cs4PbBr6 single crystal and the Cs4PbBr6 microformations was found.