Structure and Optical Properties of Mechanochemically Obtained Nanocomposite CsPbBr3/h-BN

For the first time, the possibility of a CsPbBr₃/h-BN nanocomposite preparing by a mechanochemical treatment of a dry mixture of PbBr₂ and a hexagonal boron nitride delaminated with cesium bromide has been demonstrated. X-ray diffraction and electron microscopy studies show that the use of this method leads to the formation of crystalline CsPbBr₃ nanosheets. Unlike to the mechanochemically synthesized individual CsPbBr₃, the CsPbBr₃/h-BN nanocomposite is characterized by bright green luminescence. The nanocomposite has enhanced resistance to air moisture and sunlight due to the presence of a hydrophobic thermally conductive layers of boron nitride.