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Solid-State Neutron Detection Based on Methylammonium Lead Bromide Perovskite Single Crystals
Lidia El Bouanani1,2, Sheila E Keating3, Carlos Avila-Avendano1
1Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States.
ACS Applied Materials & Interfaces
|June 9, 2021
Summary
This study introduces a novel perovskite single-crystal diode for radiation detection. The methylammonium lead bromide (MAPbBr3)/gallium oxide (Ga2O3) heterojunction efficiently detects alpha particles, gamma rays, and neutrons.
Area of Science:
- Materials Science
- Semiconductor Physics
- Radiation Detection
Background:
- Perovskite semiconductors exhibit excellent electronic and optical properties for radiation detection.
- Combining perovskites with metal oxide semiconductors creates robust diodes for detecting various radiation types.
Purpose of the Study:
- To develop a unique perovskite single-crystal-based neutron detector.
- To investigate the performance of a heterojunction diode using methylammonium lead bromide (MAPbBr3) and gallium oxide (Ga2O3) thin film.
Main Methods:
- Fabrication of a heterojunction diode using single-crystal MAPbBr3 and Ga2O3 thin film.
- Characterization of diode performance, including leakage current, on/off ratio, ideality factor, and hysteresis.
- Integration with a 10B neutron conversion layer for neutron detection.
Main Results:
- The MAPbBr3/Ga2O3 diodes exhibited a low leakage current (~7 × 10^-10 A/mm^2) and an on/off ratio of ~10^2.
- Minimal hysteresis allowed for detection of alpha particles, gamma rays, and neutrons at low bias (-5 V).
- Neutron detection efficiency reached ~3.92% with a 10B conversion layer, and gamma discrimination improved by 85%.
Conclusions:
- The MAPbBr3/Ga2O3 heterojunction diodes are effective for detecting multiple radiation types, including neutrons.
- Optimizing perovskite crystal thickness enhances gamma discrimination capabilities.
- This perovskite-based detector shows promise for advanced radiation sensing applications.
Keywords:
CH3NH3PbBr3MAPbBr3alpha detectiongamma detectionmethylammonium lead bromideneutron detectionperovskite single crystalradiation detectionMore Related Videos
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