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<p>Lead halide perovskite single crystals have gained tremendous interest for their outstanding optoelectronic properties and low defect densities, making them promising candidates for next-generation photonic and optoelectronic devices. Herein, we report the successful growth of high-quality methylammonium lead bromide (MAPbBr<sub>3</sub>) single crystals with size up to ~ 5&#xa0;mm by the inverse temperature crystallization (ITC) method under ambient conditions. The growth process exploits the inverse temperature-dependent solubility of MAPbBr<sub>3</sub> precursors in dimethylformamide (DMF), which enables the controlled growth of crystals without an inert atmosphere. The XRD pattern demonstrated the formation of phase-pure MAPbBr<sub>3</sub> with good crystallinity, and the FTIR analysis confirmed the presence of methylammonium cation and its characteristic chemical bonding environment was preserved. The processed PL spectrum showed a strong emission around 580&#xa0;nm, indicating an efficient radiative recombination and a good optical quality of the synthesized crystal. The combined structural and optical studies indicate that the ambient-condition ITC method offers a simple, reliable and cost-effective pathway for the growth of high quality MAPbBr<sub>3</sub> single crystals with significant potential for future optoelectronic and photonic applications.</p>

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Growth, structural and optical characterization of MAPbBr₃ single crystals prepared by ambient inverse temperature crystallization

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Parthkumar Zadafiya,
  • Pawan Kumar,
  • Om Modi,
  • Yogesh Sonvane

摘要

Lead halide perovskite single crystals have gained tremendous interest for their outstanding optoelectronic properties and low defect densities, making them promising candidates for next-generation photonic and optoelectronic devices. Herein, we report the successful growth of high-quality methylammonium lead bromide (MAPbBr3) single crystals with size up to ~ 5 mm by the inverse temperature crystallization (ITC) method under ambient conditions. The growth process exploits the inverse temperature-dependent solubility of MAPbBr3 precursors in dimethylformamide (DMF), which enables the controlled growth of crystals without an inert atmosphere. The XRD pattern demonstrated the formation of phase-pure MAPbBr3 with good crystallinity, and the FTIR analysis confirmed the presence of methylammonium cation and its characteristic chemical bonding environment was preserved. The processed PL spectrum showed a strong emission around 580 nm, indicating an efficient radiative recombination and a good optical quality of the synthesized crystal. The combined structural and optical studies indicate that the ambient-condition ITC method offers a simple, reliable and cost-effective pathway for the growth of high quality MAPbBr3 single crystals with significant potential for future optoelectronic and photonic applications.