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Realizing 303 ps Ultrafast Scintillation Time in 2-Inch CsPbCl3 Single Crystals Grown Under Br2 Overpressure.

Jingwei Yang1,2,3, Fangbao Wang4, Liang Chen4

  • 1Zhejiang Key Laboratory of Data-Driven High-Safety Energy Materials and Applications, Ningbo Key Laboratory of Special Energy Materials and Chemistry, Laboratory of Advanced Nuclear Materials, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China.

Materials (Basel, Switzerland)
|May 4, 2026
PubMed
Summary

Large-sized perovskite CsPbCl3Br0.03 single crystals exhibit sub-nanosecond scintillation for advanced imaging. Optimized growth and bromine doping achieve a record 303 ps decay time, ideal for fast timing applications.

Keywords:
CsPbCl3 single crystalphotoluminescenceultrafast scintillator

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Area of Science:

  • Materials Science
  • Crystallography
  • Nuclear Instrumentation

Background:

  • Ultrafast scintillator single crystals are crucial for applications like time-of-flight positron emission tomography and high-speed medical imaging.
  • Previous research demonstrated sub-nanosecond scintillation in smaller CsPbCl3Brx crystals.

Purpose of the Study:

  • To grow larger CsPbCl3Br0.03 single crystals (up to 2 inches).
  • To optimize the Bridgman growth process and bromine doping for enhanced scintillation properties.
  • To evaluate the performance of these crystals in fast timing and imaging applications.

Main Methods:

  • Vertical Bridgman crystal growth technique.
  • Temperature-dependent photoluminescence spectroscopy.
  • Alpha particle (241Am) excitation tests.
  • X-ray imaging tests.

Main Results:

  • Successfully grew 2-inch CsPbCl3Br0.03 single crystals.
  • Achieved an unprecedented scintillation decay time of 303 ps under alpha particle excitation.
  • Demonstrated an X-ray spatial resolution of 20 lp/mm.
  • Observed significantly faster decay times compared to pure CsPbCl3 and other perovskites.

Conclusions:

  • Bromine incorporation in CsPbCl3Br0.03 creates efficient fast recombination centers.
  • Large-sized CsPbCl3Brx single crystals show great potential for fast timing applications.
  • Optimized crystal growth and doping are key to achieving superior scintillation performance.