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CsPbBr3@PbBrOH 3D/1D molecular matrix for a high-performance scintillator

三维/一维CsPbBr3@PbBrOH分子矩阵高性能闪烁体

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Abstract

All-inorganic cesium lead halide perovskite nanocrystals (NCs) have become highly sought-after materials for X-ray detection and imaging because of their outstanding intrinsic electronic and optical properties. However, because of their highly ionic crystal structure, perovskite materials suffer severe moisture, thermal, and photo instability problems, which hinder their commercialization. To resolve this annoying problem, three-dimensional (3D)/1D CsPbBr3@PbBrOH composite structures in terms of molecular structure are designed by incorporating highly luminescent 3D CsPbBr3 NCs into a 1D PbBrOH matrix to form an “emitter-in-matrix”. The prepared CsPbBr3@PbBrOH exhibits excellent stability without sacrificing photoluminescence quantum yield. Meanwhile, 1D PbBrOH can be considered a perfect host, and the presence of heavy atom Pb in its matrix enhances X-ray absorption. The luminescent CsPbBr3 NCs embedded in an inert PbBrOH host are subjected to X-ray detection and imaging. The CsPbBr3@PbBrOH scintillator shows bright radiation luminescence and sensitive response to X-ray signals. In addition, the scintillator is made into a thin film screen for imaging, obtaining a clear image of the transmission electron microscopy grid hidden inside the capsule, and the resolution of CsPbBr3@PbBrOH film is calculated to be as high as 50 lp mm−1. This property of CsPbBr3@PbBrOH scintillators demonstrates their promising application prospects for ionizing radiation detection, particularly for X-ray imaging.

摘要

无机卤化铅钙钛矿纳米晶体(NCs)因其优异的固有电子和光学性能成为X射线探测和成像的热门材料. 然而, 由于钙钛矿材料的高离子晶体结构, 其存在严重的水分、热、光不稳定性问题, 阻碍了其商业化. 为了解决这一问题, 本文从分子结构的角度设计了3D/1DCsPbBr3@PbBrOH复合结构, 将高度发光的3D CsPbBr3 NCs纳入1DPbBrOH基体中, 形成“基体中的发射器”. 制备的CsPbBr3@PbBrOH在不牺牲光致发光量子产率的同时表现出优异的稳定性. 同时, 1DPbBrOH可以被认为是一个完美的宿主, 其基体中重原子Pb的存在增强了X射线的吸收. 最终, 将嵌入惰性PbBrOH宿主中的发光CsPbBr3NCs应用于X射线探测. CsPbBr3@PbBrOH闪烁体显示出明亮的辐射发光和对X射线信号的敏感响应. 此外, 将闪烁体制成薄膜屏进行成像,获得了隐藏在胶囊内部的TEM网格的清晰图像且CsPbBr3@PbBrOH薄膜的分辨率计算高达50 lp mm−1. 因此, CsPbBr3@PbBrOH闪烁体在电离辐射探测特别是X射线成像方面具有广阔的应用前景.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (11734005, 61821002, 62075041, 61704024, and 62204157) and the National Key Research and Development Plan of China (2017YFA0700503 and 2018YFA0209101).

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  1. These authors contributed equally to this work.

Authors and Affiliations

  1. State Key Laboratory of Bioelectronics, School of Physics, Southeast University, Nanjing, 210096, China

    Heng Guo  (郭衡), Yizhi Zhu  (朱益志), Qingxian Zhao  (赵庆贤), Yi Ma  (马懿), Jinping Chen  (陈金平), Lei Song  (宋磊), Zengliang Shi  (石增良) & Chunxiang Xu  (徐春祥)

  2. Faculty of Electronic Information Engineering, Huaiyin Institute of Technology, Huai’an, 223003, China

    Qingsong Jiang  (蒋青松)

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  1. Heng Guo  (郭衡)
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  2. Yizhi Zhu  (朱益志)
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  3. Qingxian Zhao  (赵庆贤)
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  8. Zengliang Shi  (石增良)
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Contributions

Xu C and Shi Z conceived the project. Guo H designed the experiments and wrote the manuscript. Zhu Y contributed to the paper writing and experimental operation. Zhao Q, Chen J, Song L, and Ma Y assisted in the material characterization and test. All authors discussed and reviewed the manuscript.

Corresponding authors

Correspondence to Zengliang Shi  (石增良) or Chunxiang Xu  (徐春祥).

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Conflict of interest

The authors declare that they have no conflict of interest.

Heng Guo received his Master’s degree from the College of Physics and Optoelectronics, Taiyuan University of Technology, in 2019. He is now a PhD candidate under the supervision of Prof. Chunxiang Xu at Southeast University. His research focuses on the synthesis of low-dimensional metal halides and X-ray detection.

Yizhi Zhu received his PhD degree from Southeast University in 2021, and now he is a postdoctoral research fellow at the College of Physics and Optoelectronics Engineering, Shenzhen University. His research interests focus on the luminescent dynamics of semiconductor materials.

Zengliang Shi earned his Bachelor’s degree in electronic science and technology from Jilin University in 2003 and a PhD degree in microelectronics and solid-state electronics in 2008. He worked as a postdoctoral fellow at Southeast University from 2008 to 2010 and then joined Southeast University. His current research interests focus on optoelectronic materials and devices and biosensors.

Chunxiang Xu obtained his PhD degree in condensed matter physics from Changchun Physics Research Institute, Chinese Academy of Sciences, in 1997. Then he joined the School of Electronic Science and Engineering and the School of Biological Science and Medical Engineering at Southeast University. He worked as a research fellow at Nanyang Technology University from 2003 to 2005. His current research interests focus on optoelectronic functional nanomaterials and biological sensing technology.

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Guo, H., Zhu, Y., Zhao, Q. et al. CsPbBr3@PbBrOH 3D/1D molecular matrix for a high-performance scintillator. Sci. China Mater. 66, 2004–2012 (2023). https://doi.org/10.1007/s40843-022-2329-9

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  • DOI: https://doi.org/10.1007/s40843-022-2329-9

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