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<p>The increasing demand for high-speed X-ray imaging requires scintillators with high light yield and fast response. Perovskite nanocrystals are promising candidates due to their distinctive optical properties and solution processability. However, the fabrication of thick X-ray films, which are several orders of magnitude thicker than conventional optoelectronic devices, leads to severe material waste and reduced light yield caused by strong spectral overlap and self-absorption. In addition, conventional synthesis methods often suffer from low reaction yields and uncontrolled exciton pathways. Here, we develop a low-temperature polar-solvent synthesis method that achieves a reaction yield of 162 mg mL<sup>−1</sup> and optimizes exciton routing for improved energy transfer. This approach increases the Stokes shift and reduces the radioluminescence decay to 7.19 ns. Consequently, high-speed X-ray imaging at 7,680 frames per second with a spatial resolution of 27.6 line-pairs per millimeter is achieved, supporting sustainable commercialization of perovskite nanocrystal scintillators for dynamic X-ray imaging.</p>

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Polar solvent strategy enables scalable synthesis of perovskite nanocrystal scintillators for fast X-ray imaging

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月30日

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  • Xudong Hu,
  • Zhicheng Wang,
  • Simil Thomas,
  • Issatay Nadinov,
  • Qiuting Cai,
  • Xingliang Dai,
  • Zhigao Huang,
  • Yue Wang,
  • Jialong Gong,
  • Ye Wu,
  • Renqian Zhou,
  • Yuanfan Wen,
  • Jian-Xin Wang,
  • Haibo Zeng,
  • Osman M. Bakr,
  • Husam N. Alshareef,
  • Xiaoming Li,
  • Omar F. Mohammed

摘要

The increasing demand for high-speed X-ray imaging requires scintillators with high light yield and fast response. Perovskite nanocrystals are promising candidates due to their distinctive optical properties and solution processability. However, the fabrication of thick X-ray films, which are several orders of magnitude thicker than conventional optoelectronic devices, leads to severe material waste and reduced light yield caused by strong spectral overlap and self-absorption. In addition, conventional synthesis methods often suffer from low reaction yields and uncontrolled exciton pathways. Here, we develop a low-temperature polar-solvent synthesis method that achieves a reaction yield of 162 mg mL−1 and optimizes exciton routing for improved energy transfer. This approach increases the Stokes shift and reduces the radioluminescence decay to 7.19 ns. Consequently, high-speed X-ray imaging at 7,680 frames per second with a spatial resolution of 27.6 line-pairs per millimeter is achieved, supporting sustainable commercialization of perovskite nanocrystal scintillators for dynamic X-ray imaging.