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. 2023 Feb 20:1–7. Online ahead of print. doi: 10.1007/s12274-023-5487-3

CsPbBr3-DMSO merged perovskite micro-bricks for efficient X-ray detection

Tongyu Shi 1,2,#, Wenjun Liu 1,3,#, Jiongtao Zhu 1, Xiongsheng Fan 1, Zhengyu Zhang 1, Xingchen He 1, Rui He 1, Jiahong Wang 1,2, Kezhen Chen 1,2, Yongshuai Ge 1,2, Xiangming Sun 4, Yanliang Liu 1,2,✉, Paul K Chu 5, Xue-Feng Yu 1,2,✉
PMCID: PMC9969382  PMID: 37359075

Abstract

Inorganic perovskite wafers with good stability and adjustable sizes are promising in X-ray detection but the high synthetic temperature is a hindrance. Herein, dimethyl sulfoxide (DMSO) is used to prepare the CsPbBr3 micro-bricks powder at room temperature. The CsPbBr3 powder has a cubic shape with few crystal defects, small charge trap density, and high crystallinity. A trace amount of DMSO attaches to the surface of the CsPbBr3 micro-bricks via Pb-O bonding, forming the CsPbBr3-DMSO adduct. During hot isostatic processing, the released DMSO vapor merges the CsPbBr3 micro-bricks, producing a compact and dense CsPbBr3 wafer with minimized grain boundaries and excellent charge transport properties. The CsPbBr3 wafer shows a large mobility-lifetime (μτ) product of 5.16 × 10−4 cm2·V−1, high sensitivity of 14,430 μC·Gyair−1·cm−2, low detection limit of 564 nGyair·s−1, as well as robust stability in X-ray detection. The results reveal a novel strategy with immense practical potential pertaining to high-contrast X-ray detection.

graphic file with name 12274_2023_5487_Fig1_HTML.jpg

Electronic Supplementary Material

Supplementary material (further details of the characterization, SEM images, AFM images, KPFM images, schematic illustration, XRD patterns, XPS spectra, FTIR spectra, UPS spectra, and stability tests) is available in the online version of this article at 10.1007/s12274-023-5487-3.

Keywords: CsPbBr3-DMSO, inorganic perovskites wafer, grain growth, crystal defect, X-ray detector

Electronic Supplementary Material

12274_2023_5487_MOESM1_ESM.pdf (1.6MB, pdf)

CsPbBr3-DMSO merged perovskite micro-bricks for efficient X-ray detection

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 21975280, 62004091, and 12235006), the Shenzhen Excellent Science and Technology Innovation Talent Training Project — Outstanding Youth Project (No. RCJC20200714114435061), the Shenzhen Basic Research Program (No. JCYJ20200109115212546), the Chinese Academy of Sciences Special Research Assistant Project (Nos. Y95909 and E15907), the Chinese Academy of Sciences Excellent Youth Innovation Fund grade B (No. E2G0161001), the Youth Innovation Promotion Association Chinese Academy of Sciences (No. 2020354), the Hong Kong ITC (Innovation and Technology Commission) ITF (Innovation and Technology Fund) (Nos. GHP/149/20SZ and CityU 9440296), and the City University of Hong Kong Donation Research Grant (DON-RMG No. 9229021).

Footnotes

Tongyu Shi and Wenjun Liu contributed equally to this work.

Contributor Information

Yanliang Liu, Email: yl.liu4@siat.ac.cn.

Xue-Feng Yu, Email: xf.yu@siat.ac.cn.

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Supplementary Materials

12274_2023_5487_MOESM1_ESM.pdf (1.6MB, pdf)

CsPbBr3-DMSO merged perovskite micro-bricks for efficient X-ray detection

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