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<p>Quantum-confined lead-halide perovskite nanocrystals (QPNCs) are a promising optoelectronic semiconductor owing to their exceptional fluorescence and the size- and dimension-tunable optical properties. QPNCs having low formation energy encounter challenges in accurately regulating the nucleation and crystal growth stages during injection-based syntheses using lead halide reagents. Here, we introduce a non-injection, one-pot synthetic approach based on bimolecular nucleophilic substitution (S<sub>N</sub>2) and thermolysis reactions of the decoupled metal and halide precursors for the large-scale production of monodisperse CsPbX<sub>3</sub>-QPNCs (X = Cl, Br, I). This approach facilitates a homogeneous supply of halide anions and metal cations, enabling the precise control over the nucleation and crystal growth stages in the isolated size-focused region. Monodisperse CsPbX<sub>3</sub>-QPNCs achieve high color purity across the RGB color gamut by adjusting size, dimensionality, and halide composition, and can be produced on an ultra-large scale.</p>

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SN2-mediated decoupled precursor provision enables large-scale production of monodisperse lead halide perovskite quantum dots in a single reactor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月15日

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  • Jigeon Kim,
  • Woongchan Kim,
  • Jin Il Jang,
  • Wooyeon Kim,
  • Doheon Yoo,
  • Jae Woo Kim,
  • Yubin Lee,
  • Min-Jae Choi,
  • Jongmin Choi,
  • Hyung Min Kim,
  • Sung Beom Cho,
  • Min Jae Ko,
  • Younghoon Kim

摘要

Quantum-confined lead-halide perovskite nanocrystals (QPNCs) are a promising optoelectronic semiconductor owing to their exceptional fluorescence and the size- and dimension-tunable optical properties. QPNCs having low formation energy encounter challenges in accurately regulating the nucleation and crystal growth stages during injection-based syntheses using lead halide reagents. Here, we introduce a non-injection, one-pot synthetic approach based on bimolecular nucleophilic substitution (SN2) and thermolysis reactions of the decoupled metal and halide precursors for the large-scale production of monodisperse CsPbX3-QPNCs (X = Cl, Br, I). This approach facilitates a homogeneous supply of halide anions and metal cations, enabling the precise control over the nucleation and crystal growth stages in the isolated size-focused region. Monodisperse CsPbX3-QPNCs achieve high color purity across the RGB color gamut by adjusting size, dimensionality, and halide composition, and can be produced on an ultra-large scale.