A bulk Schottky junction for high-sensitivity portable radiation detectors
The thickness of X-ray detectors needs to reach hundreds of micrometers to absorb X-ray, and therefore, high voltages over tens or hundreds of volts should be applied to extract X-ray-generated carriers. Here, we propose a bulk Schottky junction for X-ray detection using interpenetrated macroporous-carbon electrodes and metal-halide perovskite networks. The X-ray-generated holes are extracted by the macroporous-carbon electrodes under the built-in electric field, while the electrons in the perovskite phase result in a high gain effect. A high sensitivity of 1.42×10<sup>5</sup> μC Gy<sub>air</sub><sup>-1</sup> cm<sup>-2</sup> and a low detection limit of 48 nGy<sub>air</sub> s<sup>-1</sup> at a low voltage of -1 V are achieved. We fabricated a dry battery-powered portable X-ray alarm prototype. The pixel detector shows a decent stability under X-ray exposure, and a spatial resolution of up to 5.0 lp mm<sup>-1</sup>, and the detector arrays also exhibit remarkable uniformity, demonstrating its potential application in X-ray imaging.
Authors
- Zhengguo Xiao (ORCID: https://orcid.org/0000-0001-6646-1166)
- Zongming Huang
- Xie George Xu (ORCID: https://orcid.org/0000-0002-9512-0712)
- Ning Gao (ORCID: https://orcid.org/0000-0003-3989-557X)
- Chenghang Zheng (ORCID: https://orcid.org/0000-0003-0410-2007)
- Chen‐Chen Peng
- Junjie Yang
- Yihan Zhang
- Tao Chen (ORCID: https://orcid.org/0000-0002-3483-8341)
- Wenjing Chen (ORCID: https://orcid.org/0009-0004-6196-0467)
- Yaping Li (ORCID: https://orcid.org/0000-0003-4767-155X)
- Jingjing Zhao (ORCID: https://orcid.org/0000-0002-7223-2324)
- Yidong Yang
Institutions
- University of Science and Technology of China (CN)
- Southwest University (CN)
- Hefei National Center for Physical Sciences at Nanoscale (CN)
- CAS Key Laboratory of Urban Pollutant Conversion (CN)
- National Science Centre (PL)
Publication Details
- Journal
- Nature Communications
- Published
- 2024-11-27
- DOI
- https://doi.org/10.1038/s41467-024-54594-3
- Citations
- 10
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.09
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- University of Science and Technology of China
- Postdoctoral Research Foundation of China
- National Postdoctoral Program for Innovative Talents
- National Key Research and Development Program of China