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Related Concept Videos

Determination of Crystal Structures01:29

Determination of Crystal Structures

138
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...
138

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Related Experiment Video

Updated: May 5, 2026

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
06:46

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Centimeter-Sized CsPbBr3 Single-Crystal Films for Energy-Resolved Radiation Detection.

Rong Wu1, Yansong Yue2,3, Qingya Wang2,3

  • 1Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

ACS Applied Materials & Interfaces
|January 23, 2025
PubMed
Summary
This summary is machine-generated.

High-quality, centimeter-sized cesium lead bromide (CsPbBr3) single crystals were grown for radiation detection. These advanced single crystals show promise for high-resolution flat panel imaging detectors.

Keywords:
X-ray detectorsenergy resolutionhalide perovskitesradiation detectorssingle crystals

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Area of Science:

  • Materials Science
  • Radiation Detection Physics

Background:

  • Metal halide perovskites (MHPs) are emerging materials for radiation detection applications.
  • Single crystals (SCs) offer superior properties over polycrystalline films, including lower defect density and higher carrier mobility.
  • Synthesizing large-area MHP SCs for imaging detectors presents significant challenges.

Purpose of the Study:

  • To develop a method for growing high-quality, centimeter-sized CsPbBr3 single crystals.
  • To investigate the material properties and radiation detection performance of these CsPbBr3 SCs.
  • To evaluate the potential of these SCs for large-area flat panel imaging detectors.

Main Methods:

  • Employed a space-confined inverse temperature method to grow CsPbBr3 SCs with thicknesses ranging from 0.25 mm to 1 mm.
  • Incorporated choline bromide into the precursor solution to enhance material quality.
  • Fabricated spectral detectors and a prototype 3x3 pixelated detector for performance evaluation.

Main Results:

  • Achieved centimeter-sized CsPbBr3 SCs with reduced defect density and suppressed ion migration.
  • Obtained high resistivity (2.5 × 10^10 Ω cm) and a high mobility-lifetime product (> 1 × 10^-3 cm^2 V^-1).
  • Demonstrated excellent energy resolution for X-ray (14.96% at 59.5 keV) and alpha particles (15.95% at 5.48 MeV).

Conclusions:

  • The developed method enables the growth of high-quality, large-area CsPbBr3 SCs suitable for radiation detection.
  • The enhanced material properties translate to superior spectral detector performance.
  • These CsPbBr3 SCs are highly promising for developing next-generation, high-resolution flat panel imaging detectors.