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Nano Research 2019, 12(10): 2640-2645 https://doi.org/10.1007/s12274-019-2501-x
Research Article | Issue | Published: 27 August 2019

A facile method to fabricate high-quality perovskite nanocrystals based on single crystal powder

Show Author's Information Jin-Feng Liao§,  Yi-Xin Chen§,  Jun-Hua Wei,  Ya-Ting Cai,  Xu-Dong Wang,  Yang-Fan Xu,  Dai-Bin Kuang( )
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University,Guangzhou,510275,China;

§ Jin-Feng Liao and Yi-Xin Chen contributed equally to this work.

Keywords:
MAPbI3, nanocrystal, perovskite, transient absorption, light emitting
Topics:
Layered semiconductorsNanocrystalline powdersNanocrystalsPerovskitePhotoluminescenceSingle crystalsSols
Cite this article:
Liao J-F, Chen Y-X, Wei J-H, et al. A facile method to fabricate high-quality perovskite nanocrystals based on single crystal powder. Nano Research, 2019, 12(10): 2640-2645. https://doi.org/10.1007/s12274-019-2501-x
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Abstract Full text Electronic supplementary material About this article

Although great advancements have been successfully achieved in ligand-assisted reprecipitation strategy (LARP) towards lead halide perovskite nanocrystals (NCs) synthesis, it still remains challenging to develop bright and stable iodide-based perovskite NC via facile LARP. Herein, strikingly bright MAPbI3 NCs with photoluminescence quantum yield (PLQY) as high as 79% are synthesized via replacing the raw material (MAI and PbI2) with MAPbI3 crystal powder during LARP procedure. It has been found that crystal powder derived MAPbI3 NCs are more iodide-rich compared with that based on raw material, which is favorable to passivate the surface trap state. Accordingly, femtosecond transient absorption spectroscopies and space charge limited current measurements have corroborated that the trap density is much less in crystal powder resulted MAPbI3 NCs. Further analyses indicate stronger solvation with reduced precursor colloid size has been observed in crystal powder derived precursor solution probably due to the formation of MAPbI3·DMF. This work has provided a facile but valid method to enhance the photoluminescence of perovskite NC via modulating the beginning precursor solution.


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Electronic supplementary material
About this article

A facile method to fabricate high-quality perovskite nanocrystals based on single crystal powder

Show Author's information Jin-Feng Liao§, Yi-Xin Chen§, Jun-Hua Wei, Ya-Ting Cai, Xu-Dong Wang, Yang-Fan Xu, Dai-Bin Kuang( )
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University,Guangzhou,510275,China;

§ Jin-Feng Liao and Yi-Xin Chen contributed equally to this work.

Abstract

Although great advancements have been successfully achieved in ligand-assisted reprecipitation strategy (LARP) towards lead halide perovskite nanocrystals (NCs) synthesis, it still remains challenging to develop bright and stable iodide-based perovskite NC via facile LARP. Herein, strikingly bright MAPbI3 NCs with photoluminescence quantum yield (PLQY) as high as 79% are synthesized via replacing the raw material (MAI and PbI2) with MAPbI3 crystal powder during LARP procedure. It has been found that crystal powder derived MAPbI3 NCs are more iodide-rich compared with that based on raw material, which is favorable to passivate the surface trap state. Accordingly, femtosecond transient absorption spectroscopies and space charge limited current measurements have corroborated that the trap density is much less in crystal powder resulted MAPbI3 NCs. Further analyses indicate stronger solvation with reduced precursor colloid size has been observed in crystal powder derived precursor solution probably due to the formation of MAPbI3·DMF. This work has provided a facile but valid method to enhance the photoluminescence of perovskite NC via modulating the beginning precursor solution.

Keywords: MAPbI3, nanocrystal, perovskite, transient absorption, light emitting

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Publication history
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Acknowledgements

Publication history

Received: 10 June 2019
Revised: 11 August 2019
Accepted: 13 August 2019
Published: 27 August 2019
Issue date: October 2019

Copyright

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

Acknowledgements

Acknowledgements

The authors acknowledge the financial supports from the National Natural Science Foundation of China (No. 21875288), the GDUPS (2016) and Fundamental Research Funds for the Central Universities.

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