Highly stable lead-free Cs3Bi2I9 perovskite nanoplates for photodetection applications

  • Zhaoyang Qi
  • Xianwei Fu
  • Tiefeng Yang
  • Dong Li
  • Peng Fan
  • Honglai Li
  • Feng Jiang
  • Lihui Li
  • Ziyu Luo
  • Xiujuan Zhuang
  • Anlian PanEmail author
Research Article


Lead halide perovskites have received tremendous attentions recently for their excellent properties such as high light absorption coefficient and long charge carrier diffusion length. However, the stability issues and the existence of toxic lead cations have largely limited their applications in optoelectronic area. Herein, we report the synthesis and investigation of highly stable and lead-free Cs3Bi2l9 perovskite nanoplates for visible light photodetection applications. The Cs3Bi2l9 nanoplates were synthesized through a facile solution-processed method, which is also applicable to various substrates. The achieved nanoplates present very good crystal quality and exhibit excellent long-term stability even exposed in moist air for several months. Photodetectors were constructed based on these high-quality perovskite nanoplates for the first time, and display a maximum photoresponsivity of 33.1 mA/W under the illumination of 450 nm laser, which is six times higher than the solution-synthesized CH3NH3Pbl3 nanowire photodetectors. The specific detectivity of these devices can reach up to 1010 Jones. Additionally, the devices exhibit fast rise and decay time of 10.2 and 37.2 ms, respectively, and highly stable photoswitching behavior with their photoresponse well retaining under alternating light and darkness. This work opens up a new opportunity for stable and low-toxic perovskite-based optoelectronic applications.


bismuth inorganic perovskite lead-free highly stable nanoplates photodetector 


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The authors are grateful to the National Natural Science Foundation of China (Nos. 51525202, 51772084, 61574054, 61635001, and 51802089), Innovation platform and talent plan of Hunan Province (No. 2017RS3027), the Program for Youth Leading Talent and Science and Technology Innovation of Ministry of Science and Technology of China, and the Foundation for Innovative Research Groups of NSFC (No. 21521063).

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Highly stable lead-free Cs3Bi2I9 perovskite nanoplates for photodetection applications


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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Zhaoyang Qi
    • 1
  • Xianwei Fu
    • 1
  • Tiefeng Yang
    • 1
  • Dong Li
    • 1
  • Peng Fan
    • 1
  • Honglai Li
    • 1
  • Feng Jiang
    • 1
  • Lihui Li
    • 1
  • Ziyu Luo
    • 1
  • Xiujuan Zhuang
    • 1
  • Anlian Pan
    • 1
    Email author
  1. 1.Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials and Engineering School of Physics and Electronic Science, and State Key Laboratory of Chemo/Biosensing and ChemometricsHunan UniversityChangshaChina

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