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Nano Research 2022, 15(3): 2399-2404 https://doi.org/10.1007/s12274-021-3808-y
Research Article | Issue | Published: 09 September 2021

X-ray imager of 26-μm resolution achieved by perovskite assembly

Show Author's Information Zhaofen Wang1,§,  Ruijia Sun2,§,  Nianqiao Liu3,§,  Huailin Fan4,  Xun Hu4,  Depeng Shen2( ),  Yuhai Zhang2( ),  Hong Liu1,2( )
State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China
Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Jinan 250022, China
School of Physics and Technology, University of Jinan, Jinan 250022, China
School of Material Science and Engineering, University of Jinan, Jinan 250022, China

§Zhaofen Wang, Ruijia Sun, and Nianqiao Liu contributed equally to this work.

Keywords:
self-assembly, all-inorganic perovskite, perovskite scintillator, high-resolution X-ray imaging, perovskite nanosheets
Topics:
Imaging technique
Cite this article:
Wang Z, Sun R, Liu N, et al. X-ray imager of 26-μm resolution achieved by perovskite assembly. Nano Research, 2022, 15(3): 2399-2404. https://doi.org/10.1007/s12274-021-3808-y
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Abstract Full text About this article

Spatial resolution is an important criterion to evaluate the performance of a scintillation screen for X-ray imaging. Perovskite-based X-ray screen, usually made of powders or polycrystalline films, suffers from low spatial resolution (~ 200 μm) due to the large thickness of scintillation layer despite of their compelling sensitivity to X-ray dose. In this work, a concentrated colloid of CsPbBr3 nanosheets was synthesized via a co-precipitation method at ambient condition. By drop casting, smooth scintillation screens of varied thickness were formed through self-assembly, which exhibited both high internal and external photoluminescence quantum yield (PL QY) (84.5% and 75.1%, respectively). The screen-based X-ray detector showed a high sensitivity down to 27 nGy/s, two orders of magnitude lower than the regular dose for medical diagnostics. Importantly, the screen of optimal thickness of 15 μm showcased an unprecedented spatial resolution (26 μm) when used for X-ray radiography, representing one order of magnitude improvement in perovskite community.


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About this article

X-ray imager of 26-μm resolution achieved by perovskite assembly

Show Author's information Zhaofen Wang1,§, Ruijia Sun2,§, Nianqiao Liu3,§, Huailin Fan4, Xun Hu4, Depeng Shen2( ), Yuhai Zhang2( ), Hong Liu1,2( )
State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China
Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Jinan 250022, China
School of Physics and Technology, University of Jinan, Jinan 250022, China
School of Material Science and Engineering, University of Jinan, Jinan 250022, China

§Zhaofen Wang, Ruijia Sun, and Nianqiao Liu contributed equally to this work.

Abstract

Spatial resolution is an important criterion to evaluate the performance of a scintillation screen for X-ray imaging. Perovskite-based X-ray screen, usually made of powders or polycrystalline films, suffers from low spatial resolution (~ 200 μm) due to the large thickness of scintillation layer despite of their compelling sensitivity to X-ray dose. In this work, a concentrated colloid of CsPbBr3 nanosheets was synthesized via a co-precipitation method at ambient condition. By drop casting, smooth scintillation screens of varied thickness were formed through self-assembly, which exhibited both high internal and external photoluminescence quantum yield (PL QY) (84.5% and 75.1%, respectively). The screen-based X-ray detector showed a high sensitivity down to 27 nGy/s, two orders of magnitude lower than the regular dose for medical diagnostics. Importantly, the screen of optimal thickness of 15 μm showcased an unprecedented spatial resolution (26 μm) when used for X-ray radiography, representing one order of magnitude improvement in perovskite community.

Keywords: self-assembly, all-inorganic perovskite, perovskite scintillator, high-resolution X-ray imaging, perovskite nanosheets

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Publication history
Copyright
Acknowledgements

Publication history

Received: 21 June 2021
Revised: 01 August 2021
Accepted: 10 August 2021
Published: 09 September 2021
Issue date: March 2022

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 21805111), Natural Science Foundation of Shandong Province (No. ZR2020YQ12), and Taishan Scholar Project of Shandong Province (No. tsqn201812082).

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