Split Ligand Assisted synthesis of CH₃NH₃PbX₃ (X = Br, I) Perovskite Quantum Dots with narrow FWHM and high stability.
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Organometalic halide perovskites (CH₃NH₃PbX₃, X = Br, I) Quantum Dots (QDs) are prepared by the Split ligand assisted re-precipitation method. Oleic acid dissolved in non-solvent improves the solvent mixing and leads to crystallization process while improving the full mixture of precursor and non-solvents. By this effect, Halide perovskite QDs synthesized by split method has more stability and narrower PL spectra FWHM than QDs synthesized by conventional LARP method. Size-tunability of CH₃NH₃PbX₃ (X = Br, I) QDs was achieved by halide variation and ligand concentration. Significantly, tunable PL emission wavelengths and energy band gaps are achieved by the quantum confinement effect. Finally, CH₃NH₃PbX₃ (X = Br, I) QDs synthesized by split method are expected to have potential applications in solar cell, photoresistor and electroluminescent devices.