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Related Concept Videos

Determination of Crystal Structures01:29

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In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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Trifunctional Kinetic Regulation Enables Low-Defect Solution Grown Single Crystals for X-Ray Detection.

Hui Zhang1,2, Zihan Wang1, Zhenyu Wang1

  • 1Institute of Solid-State Physics, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|May 30, 2026
PubMed
Summary
This summary is machine-generated.

We developed a new method using iodoacetic acid to create stable, high-performance perovskite single crystals for X-ray detection. This strategy significantly improves detector sensitivity and lowers detection limits.

Keywords:
Cs4PbI6X‐ray detectionkinetic regulationsingle crystalstrifunctional

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Crystallography

Background:

  • All-inorganic 0D perovskite materials show promise for X-ray detection due to their stability.
  • Practical applications are hindered by point defects and solvent incorporation, limiting performance.
  • Developing strategies to overcome these limitations is crucial for advancing X-ray detector technology.

Purpose of the Study:

  • To introduce a universal trifunctional kinetic regulation strategy for enhancing the performance of 0D perovskite single-crystal X-ray detectors.
  • To address intrinsic point defects and solvent incorporation issues in perovskite materials.
  • To achieve high sensitivity and low detection limits in X-ray detectors.

Main Methods:

  • Utilized iodoacetic acid (IAA) as a multifunctional additive for dynamic crystal growth regulation.
  • Employed a synergistic mechanism involving carboxyl group coordination, iodide ion compensation, and steric hindrance.
  • Synthesized Cs4PbI6 single crystals with controlled defect passivation and reduced solvent incorporation.

Main Results:

  • Achieved Cs4PbI6 single crystals with high resistivity (1.95 × 10^10 Ω cm) and enhanced carrier mobility-lifetime product (µτ = 2.18 × 10^-4 cm^2 V^-1).
  • Developed X-ray detectors demonstrating high sensitivity (897.4 µC Gyair cm^-2) and a low detection limit (29.81 nGyair s^-1) for 80 keV X-rays.
  • Exhibited robust operational and environmental stability in the fabricated detectors.

Conclusions:

  • The trifunctional kinetic regulation strategy using IAA is effective for molecular-level design of high-performance perovskite single crystals.
  • This approach successfully suppresses defects and solvent incorporation, leading to superior X-ray detection properties.
  • The developed Cs4PbI6 single-crystal X-ray detectors offer a promising solution for advanced X-ray imaging and detection applications.