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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
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Direct Fast-Neutron Detection by 2D Perovskite Semiconductor.

Yuting Gao1, Pengying Wan2, Tong Jin3

  • 1Engineering Research Center of Nano-Geomaterials of the Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 7, 2023
PubMed
Summary

A new 2D perovskite semiconductor, BDAPbBr4, enables direct fast-neutron detection. This material offers a high neutron capture cross-section and a record mobility-lifetime product, outperforming existing detectors for applications in imaging and therapy.

Keywords:
Dion-Jacobson perovskitesfast-neutronradiation detectorssemiconductorstwo-dimensional perovskite

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Area of Science:

  • Materials Science
  • Semiconductor Physics
  • Nuclear Instrumentation

Background:

  • Fast-neutrons are crucial for medical imaging, therapy, and nondestructive inspection.
  • Direct semiconductor detection of fast-neutrons is difficult due to weak interaction and low carrier mobility-lifetime (µτ) products.
  • Existing semiconductor detectors struggle with efficient charge collection for fast-neutron detection.

Purpose of the Study:

  • To introduce a novel 2D Dion-Jacobson perovskite semiconductor, BDAPbBr4, for direct fast-neutron detection.
  • To evaluate the performance of BDAPbBr4 in detecting fast-neutrons, focusing on its material properties and detector response.
  • To demonstrate a new strategy for designing efficient fast-neutron detection materials.

Main Methods:

  • Synthesis and characterization of the 2D Dion-Jacobson perovskite semiconductor BDAPbBr4.
  • Measurement of material properties including fast-neutron capture cross-section, electrical stability, resistivity, and mobility-lifetime (µτ) product.
  • Fabrication and testing of a BDAPbBr4-based detector for fast-neutron response in both counting and integration modes.

Main Results:

  • BDAPbBr4 exhibits a high fast-neutron capture cross-section, good electrical stability, and high resistivity.
  • A record-high mobility-lifetime (µτ) product of 3.3 × 10-4 cm2 V-1 was achieved, surpassing most reported semiconductors.
  • The BDAPbBr4 detector demonstrated effective fast-neutron energy spectra measurement and linear, fast response in integration mode.

Conclusions:

  • BDAPbBr4 is a promising material for direct fast-neutron detection, offering superior performance compared to existing semiconductors.
  • This work presents a significant advancement in material design for efficient fast-neutron detection.
  • The developed material and detection strategy open new possibilities for applications in fast-neutron imaging and therapy.