Author: K. M. Norboev, Kh. Sh.Tashpulatov, D. T. Toshpulatov, O.U.Normurodov, Sh. E. Mirzaev, Sh. N. Magdiev, D. G. Khaitov and T. S. Urozov

DOI: http://doi.org/10.31788/RJC.2026.1939779

In recent years, metal halide perovskite-structured materials have attracted the fascination of many researchers dueto their unique properties and widely used optoelectronics. Defect tolerance properties of perovskite quantumdots(QDs) make them superior to conventional QDs (e.g., CdTe, ZnS, etc.). Here, we report a ligand-free, highlyeffective method for the preparation of highly luminescent and stable CsPbBr3 perovskite via precipitation usingstarting materials CsBr and PbBr2 in the solvent dimethyl sulfoxide (DMSO). Subsequent treatment with tolueneand acetonitrile (ACN) leads to the formation of highly luminescent and more stable perovskite QDs. The stabilityof monodisperse CsPbBr3, crystal structure, and photophysical properties were explored using spectral analysismethods. Decomposition routes leading to nonfluorescent phases were discussed. Diffuse reflectance studies showedthat perovskite QDs have a bandgap energy of 2.24 eV. Thorough crystal structure analysis confirmed that theobtained CsPbBr3 perovskite QDs possess a cubic structure. This work aligns with SDG 7 – Affordable and CleanEnergy.

Keywords: CsPbBr3, Crystal, Diffraction, QDs, Precursor, Perovskite.