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<p>Inorganic perovskite CsPbCl<sub>3</sub> single crystals (SCs) are promising for stable and high-performance X-ray detection due to their high X-ray absorption, superior optoelectronic properties, and superior chemical and thermal stability. However, the size of CsPbCl<sub>3</sub> SCs grown via low-energy-consumption solution methods remains limited to below 1&#xa0;mm, primarily because of the limited solubility of raw materials in solvents and the lack of effective growth techniques. In this work, an amine-salt-assisted solution crystallization strategy is developed to grow high-quality CsPbCl<sub>3</sub> SCs with size up to 15&#xa0;mm. This significant size improvement is enabled by a 13-fold increase in precursor solubility, achieved by constructing hydrogen bond interactions between the amine salt and insoluble raw materials. Consequently, the SCs exhibit high <i>μτ</i> product (6.3 × 10<sup>–3</sup> cm<sup>2</sup>&#xa0;V<sup>−1</sup>), low trap density (2.9 × 10<sup>10</sup>&#xa0;cm<sup>−3</sup>), and large resistivity (1.7 × 10<sup>9</sup>&#xa0;Ω&#xa0;cm). Therefore, the SC detectors achieve a record-high sensitivity of 76,624&#xa0;μC Gy<sup>−1</sup>&#xa0;cm<sup>−2</sup> and a low detection limit of 47.9&#xa0;nGy s<sup>−1</sup> even under low bias voltages, enabling high contrast X-ray imaging. This ingenious and executable low-temperature solution crystallization strategy combined with superior X-ray detection performance makes CsPbCl<sub>3</sub> SCs promising to advance the low-cost development of safe radiation detection systems.</p>

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Amine-Salt-Assisted Solution Crystallization of Inorganic Perovskite Single Crystals for High-Performance X-Ray Detection

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月1日

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  • Yujia Jiang,
  • Depeng Chu,
  • Jiacheng Pi,
  • Naiming Liu,
  • Xueni Sun,
  • Yunxia Zhang,
  • Ziyang Feng,
  • Yuquan Wang,
  • Wenjie Chen,
  • Xinxin Wang,
  • Jingyun Tian,
  • Lei Zhao,
  • Binxia Jia,
  • Ruixin Shi,
  • Yihui He,
  • Yucheng Liu,
  • Shengzhong Frank Liu

摘要

Inorganic perovskite CsPbCl3 single crystals (SCs) are promising for stable and high-performance X-ray detection due to their high X-ray absorption, superior optoelectronic properties, and superior chemical and thermal stability. However, the size of CsPbCl3 SCs grown via low-energy-consumption solution methods remains limited to below 1 mm, primarily because of the limited solubility of raw materials in solvents and the lack of effective growth techniques. In this work, an amine-salt-assisted solution crystallization strategy is developed to grow high-quality CsPbCl3 SCs with size up to 15 mm. This significant size improvement is enabled by a 13-fold increase in precursor solubility, achieved by constructing hydrogen bond interactions between the amine salt and insoluble raw materials. Consequently, the SCs exhibit high μτ product (6.3 × 10–3 cm2 V−1), low trap density (2.9 × 1010 cm−3), and large resistivity (1.7 × 109 Ω cm). Therefore, the SC detectors achieve a record-high sensitivity of 76,624 μC Gy−1 cm−2 and a low detection limit of 47.9 nGy s−1 even under low bias voltages, enabling high contrast X-ray imaging. This ingenious and executable low-temperature solution crystallization strategy combined with superior X-ray detection performance makes CsPbCl3 SCs promising to advance the low-cost development of safe radiation detection systems.