Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 11, Issue 19, Pages 7939-7945Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.0c02343
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Funding
- National Natural Science Foundation of China [NSFC21773218]
- Department of Science and Technology of Sichuan Province [2018JY0206]
- Foundation of President of China Academy of Engineering Physics [YZJJLX2018007]
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The poor attenuation capability of high-energy X-ray photons hinders the application of X-ray detectors in medical and astrophysical areas. Halide-based perovskites are promising candidates for X-ray detection because of their improved sensitivity. However, their inferior attenuation coefficient is still unsatisfactory for broadband X-ray detection. Here, a new kind of X-ray detection material, AgBi2I7 rudorffite single crystal (SC), is prepared and applied in X-ray detection for the first time, and it shows a higher attenuation coefficient than halide-based perovskites, commercialized a-Se, and the currently outstanding Cd0.9Zn0.1Te (CZT). The AgBi2I7 rudorffite SCs possess outstanding electric properties and excellent stability. AgBi2I7-SC detectors demonstrate a limit of detection (LoD) of 72 nGy(air) s(-1) and a sensitivity of 282.5 mu C Gy(air)(-1)cm(-2) to X-rays and show only a slight performance degradation after ontinuous X-ray irradiation with a total dose of 58 Gy(air). This work opens up a new perspective and broad opportunities for halide rudorffite in X-ray detection.
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