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Nano Research 2021, 14(11): 4116-4124 https://doi.org/10.1007/s12274-021-3351-x
Research Article | Issue | Published: 13 March 2021

Crystalline all-inorganic lead-free Cs3Sb2I9 perovskite microplates with ultra-fast photoconductive response and robust thermal stability

Show Author's Information Sujit Kumer Shil1,3,§,  Fei Wang2,4,5,§( ),  Zhengxun Lai2,  You Meng2,  Yunpeng Wang4,  Dongxu Zhao4,  Mohammad Kamal Hossain1,6,  Kingsley O. Egbo1,  Ying Wang1,  Kin Man Yu1( ),  Johnny C. Ho2,5( )
Department of Physics City University of Hong Kong, KowloonHong Kong China
Department of Materials Science and Engineering City University of Hong Kong, KowloonHong Kong China
Department of Physics Khulna University of Engineering & Technology (KUET)Khulna 9203 Bangladesh
State Key Laboratory of Luminescence and Applications Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences3888 Dongnanhu Road, Changchun 130021 China
State Key Laboratory of Terahertz and Millimeter Waves City University of Hong Kong, KowloonHong Kong China
Department of Physics Comilla University, KotbariComilla 3506 Bangladesh

§ Sujit Kumer Shil and Fei Wang contributed equally to this work.

Keywords:
stability, photoresponse, all-inorganic, lead-free perovskites, Cs3Sb2I9, microplates
Topics:
Perovskite
Cite this article:
Shil SK, Wang F, Lai Z, et al. Crystalline all-inorganic lead-free Cs3Sb2I9 perovskite microplates with ultra-fast photoconductive response and robust thermal stability. Nano Research, 2021, 14(11): 4116-4124. https://doi.org/10.1007/s12274-021-3351-x
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Abstract Full text Electronic supplementary material About this article

Hybrid organolead halide perovskites have attracted tremendous attention due to their recent success as high efficiency solar cell materials and their fascinating material properties uniquely suitable for optoelectronic devices. However, the poor ambient and operational stability as well as the concern of lead toxicity greatly hamper their practical utilization. In this work, crystalline, all-inorganic and lead-free Cs3Sb2I9 perovskite microplates are successfully synthesized by a two-step chemical vapor deposition method. As compared with other typical lead-free perovskite materials, the Cs3Sb2I9 microplates demonstrate excellent optoelectronic properties, including substantial enhancements in the Stokes shift, exciton binding energy and electron-phonon coupling. Simple photoconductive devices fabricated using these microplates exhibit an ultra-fast response with the rise and decay time constants down to 96 and 58 μs, respectively. This respectable photoconductor performance can be regarded as a record among all the lead-free perovskite materials. Importantly, these photodetectors show superior thermal stability in a wide temperature range, capable to function reversibly between 80 and 380 K, indicating their robustness to operate under both low and high temperatures. All these results evidently suggest the technological potential of inorganic lead-free Cs3Sb2I9 perovskite microplates for next-generation high-performance optoelectronic devices.


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Electronic supplementary material
About this article

Crystalline all-inorganic lead-free Cs3Sb2I9 perovskite microplates with ultra-fast photoconductive response and robust thermal stability

Show Author's information Sujit Kumer Shil1,3,§, Fei Wang2,4,5,§( ), Zhengxun Lai2, You Meng2, Yunpeng Wang4, Dongxu Zhao4, Mohammad Kamal Hossain1,6, Kingsley O. Egbo1, Ying Wang1, Kin Man Yu1( ), Johnny C. Ho2,5( )
Department of Physics City University of Hong Kong, KowloonHong Kong China
Department of Materials Science and Engineering City University of Hong Kong, KowloonHong Kong China
Department of Physics Khulna University of Engineering & Technology (KUET)Khulna 9203 Bangladesh
State Key Laboratory of Luminescence and Applications Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences3888 Dongnanhu Road, Changchun 130021 China
State Key Laboratory of Terahertz and Millimeter Waves City University of Hong Kong, KowloonHong Kong China
Department of Physics Comilla University, KotbariComilla 3506 Bangladesh

§ Sujit Kumer Shil and Fei Wang contributed equally to this work.

Abstract

Hybrid organolead halide perovskites have attracted tremendous attention due to their recent success as high efficiency solar cell materials and their fascinating material properties uniquely suitable for optoelectronic devices. However, the poor ambient and operational stability as well as the concern of lead toxicity greatly hamper their practical utilization. In this work, crystalline, all-inorganic and lead-free Cs3Sb2I9 perovskite microplates are successfully synthesized by a two-step chemical vapor deposition method. As compared with other typical lead-free perovskite materials, the Cs3Sb2I9 microplates demonstrate excellent optoelectronic properties, including substantial enhancements in the Stokes shift, exciton binding energy and electron-phonon coupling. Simple photoconductive devices fabricated using these microplates exhibit an ultra-fast response with the rise and decay time constants down to 96 and 58 μs, respectively. This respectable photoconductor performance can be regarded as a record among all the lead-free perovskite materials. Importantly, these photodetectors show superior thermal stability in a wide temperature range, capable to function reversibly between 80 and 380 K, indicating their robustness to operate under both low and high temperatures. All these results evidently suggest the technological potential of inorganic lead-free Cs3Sb2I9 perovskite microplates for next-generation high-performance optoelectronic devices.

Keywords: stability, photoresponse, all-inorganic, lead-free perovskites, Cs3Sb2I9, microplates

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Acknowledgements

Publication history

Received: 21 October 2020
Revised: 16 January 2021
Accepted: 20 January 2021
Published: 13 March 2021
Issue date: November 2021

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

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 11874351, 11874352, 51672229, and 61805237), the Hong Kong Scholars Program (No. XJ2019027), the General Research Fund (CityU 11204618) and the Theme- based Research (No. T42-103/16-N) of the Research Grants Council of Hong Kong SAR, China, CityU SGP-9380076 and the Foshan Innovative and Entrepreneurial Research Team Program (No. 2018IT100031).

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