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High-Performance Industrial-Grade CsPbBr

Qihao Sun1, Bangzhi Ge1, Bao Xiao1

  • 1State Key Laboratory of Solidification Processing & Key Laboratory of Radiation Detection Materials and Devices, MIIT, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 7, 2023
PubMed
Summary
This summary is machine-generated.

Large cesium lead bromide (CsPbBr3) crystals achieve high performance for room-temperature gamma-ray detection by optimizing crystal growth. This breakthrough enables cost-effective, efficient gamma-ray detectors for practical applications.

Keywords:
CsPbBr3single crystalγ-ray detection

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Nuclear Instrumentation

Background:

  • All-inorganic metal halide perovskite CsPbBr3 crystals are promising for room-temperature gamma-ray detection.
  • Existing large CsPbBr3 crystals suffer from low detection efficiency due to secondary phase inclusions that trap charge carriers.

Purpose of the Study:

  • To engineer the crystal growth of CsPbBr3 to overcome limitations in large crystal performance.
  • To achieve high-quality, large-diameter CsPbBr3 crystals suitable for practical gamma-ray detection.

Main Methods:

  • Optimized the solid-liquid interface during crystal growth by controlling temperature gradient and growth velocity.
  • Minimized the formation of secondary phases within the crystal structure.
  • Fabricated industrial-grade CsPbBr3 crystals with a 30 mm diameter.

Main Results:

  • Achieved high carrier mobility of 35.4 cm2 V-1 s-1 in the large CsPbBr3 crystals.
  • Demonstrated excellent gamma-ray detection performance, resolving the 137Cs peak at 662 keV with 9.91% energy resolution.
  • Obtained the highest performance metrics reported for large CsPbBr3 crystals to date.

Conclusions:

  • Engineered crystal growth successfully suppressed secondary phase formation in large CsPbBr3 crystals.
  • The developed large CsPbBr3 crystals exhibit superior carrier mobility and gamma-ray detection resolution.
  • This advancement paves the way for cost-effective, deployable room-temperature gamma-ray detectors.