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X-ray scintillation in lead-free double perovskite crystals

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Abstract

Metal halide perovskites have shown great performance for various applications, including solar cells, light emitting diodes, and radiation detectors, but they still suffer from the toxicity of lead and instability. Here we report the use of lanthanide series as trivalent metals to obtain low toxicity and highly stable double perovskites (Cs2NaLnCl6, Ln=Tb or Eu) with high scintillation light yield. The crystals exhibit typical f-f transitions of lanthanide cations, while Cs2NaTbCl6 exhibits strong green photoluminescence, and Cs2NaEuCl6 exhibits red photoluminescence. Under X-ray radiations, the light yield of Cs2NaTbCl6 reaches 46600 photons MeV−1, much higher than that of the commercially used (Lu,Y)2SiO5:Ce3+ crystals (LYSO, 28500 photons MeV−1), and previously reported lead-based perovskites (14000 photons MeV−1). As a new member of lead-free perovskites, lanthanide-based double perovskites open up a new route toward radiation detections and potential medical imaging.

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Acknowledgements

This work was supported by the Major State Basic Research Development Program of China (2016YFB0700702), the National Natural Science Foundation of China (5171101030, 51602114), the HUST Key Innovation Team for Interdisciplinary Promotion (2016JCTD111) and the Open Fund of State Key Laboratory of Luminescence and Applications (SKLA-2016-08). The authors thank the Analytical and Testing Center of HUST and the facility support of the Center for Nanoscale Characterization and Devices, WNLO.

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Authors and Affiliations

  1. Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan, 430074, China

    Qingsong Hu, Zhifang Tan, Guangda Niu, Haodi Wu & Jiang Tang

  2. School of Information Engineering, Nanchang University, Nanchang, 330031, China

    Zhenzhou Deng

  3. School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China

    Manchen Hu

  4. College of Life Science and Technology, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China

    Anjiang Zhao

  5. College of Physics, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China

    Yaqi Zhang

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  1. Qingsong Hu
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  2. Zhenzhou Deng
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  3. Manchen Hu
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  4. Anjiang Zhao
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  5. Yaqi Zhang
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  6. Zhifang Tan
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  7. Guangda Niu
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  8. Haodi Wu
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  9. Jiang Tang
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Correspondence to Guangda Niu or Jiang Tang.

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Hu, Q., Deng, Z., Hu, M. et al. X-ray scintillation in lead-free double perovskite crystals. Sci. China Chem. 61, 1581–1586 (2018). https://doi.org/10.1007/s11426-018-9308-2

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  • DOI: https://doi.org/10.1007/s11426-018-9308-2

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