Synthesis and emission characteristics of lead-free novel Cs4SnBr6/SiO2 nanocomposite

[Display omitted] •Novel lead-free Cs4SnBr6/SiO2 perovskite nanocomposite has been synthesized.•Structural study confirms the synthesis of nanocomposite.•TEM/HRTEM images shows monodispersed honeycomb morphology with size ~25 nm size.•TEM images confirmed Cs4SnBr6 NPs were covered with a thin layer of amorphous SiO2.•High emission intensity was noticed for Cs4SnBr6/SiO2 nanocomposite with stability. Lead-free Cs4SnBr6 nanostructures were synthesized using the high-temperature wet chemical method with as prepared cesium oleate and oleylammonium bromide. A new type of the SiO2 layer formation method was followed using TEOS and m-cresol. Phase stability of the Cs4SnBr6 and Cs4SnBr6/SiO2 aged samples was analyzed by the X-ray diffraction method. Transmission electron microscopy micrographs show that the hexagonally shaped particles covered with a thin SiO2 layer for Cs4SnBr6/SiO2 and were verified with TEM-EDS spectra. Synthesized particles showed a bright orange colour fluorescence emission under UV light and were confirmed with fluorescence emission spectroscopy.