Modulating, structural, optical band gap, luminescence, and electrical properties of perspective synthesized lead-free halide perovskite CsSnCl3/Cs2O nanocomposites

This study investigates the structural characteristics, optical band gap, luminescence, and electrical properties of a newly synthesized lead-free halide CsSnCl3 perovskite semiconductor/ Cs2O nanocomposite. The XRD patterns show that there is a monoclinic crystal phase of the perovskite semiconductor CsSnCl3 as well as a rhombohedral phase of Cs2O at 400 degrees C in an argon environment. Moreover, the XPS spectra of the sample at 400 degrees C reveal the presence of Cs 3d, Sn 3d, Cl 2p, and O 1s, indicating the production of both substances. HRTEM and FESEM enable the visualization of both the structural details and size variations in quantum dot-like materials. The optical band gap of synthesized nanocomposite compositions shows a clear red shift in the absorption spectra, which lowers the band gap from 2.7 eV to 1.37 eV. An influential and tunable photoluminescence emission was found at ambient temperature, spanning a broad spectrum from the visible to near-infrared area. When exposed to an argon environment at 400 degrees C, the material's structural features changed significantly. In the lower frequency range, the permittivity exceeded 10(6), and the DC conductivity increased to 6.15 x 10(-6) S/cm. This research examines the multifunctional potential of CsSnCl3/Cs2O nanocomposites, investigating their optical, luminescent, and electrical properties.