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Nano Research 2019, 12(7): 1733-1738 https://doi.org/10.1007/s12274-019-2430-8
Research Article | Issue | Published: 15 May 2019

Gram-scale synthesis of all-inorganic perovskite quantum dots with high Mn substitution ratio and enhanced dual-color emission

Show Author's Information Lvming Dong1,2,§,  Zhuo Chen1,2,§,  Lei Ye1,2( ),  Yan Yu1,2,  Jianbing Zhang1,  Huan Liu1,  Jianfeng Zang1,2( )
School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan,430074,China;
Innovation Institute,Huazhong University of Science and Technology,Wuhan,430074,China;

§Lvming Dong and Zhuo Chen contributed equally to this work.

Keywords:
quantum dots, gram-scale, enhanced dual-color emission, all-inorganic perovskite, invisible ink, polymer composites
Topics:
Light sourcesManganeseNanocrystalsPerovskite
Cite this article:
Dong L, Chen Z, Ye L, et al. Gram-scale synthesis of all-inorganic perovskite quantum dots with high Mn substitution ratio and enhanced dual-color emission. Nano Research, 2019, 12(7): 1733-1738. https://doi.org/10.1007/s12274-019-2430-8
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Abstract Full text Electronic supplementary material About this article

Mn-doped all-inorganic perovskite quantum dots (QDs) provide prominent applications in the fields of low-cost light source or display, because of their remarkable properties including dual-color emission and reduced lead content, as well as high photoluminescence quantum yields (PLQYs) and high stability. However, the existing synthesis approaches usually require hash conditions, such as high temperature and nitrogen protection, which is a major hurdler for the practical manufacturing. In addition, the significantly high Mn substitution ratio in CsPbX3 QDs is still challenging. The real dual-color emission with two strong emission peaks in the Mn-doped all-inorganic perovskite QDs has attracted great interest. Here we present a gram-scale approach to synthesize both CsPbxMn1−xCl3 and CsPb1−xMnxClyBr3−y QDs at 100 ℃ in the air with high Mn substitution ratio, up to 55.64% atomically. The as-prepared CsPb1−xMnxClyBr3−y QDs exhibit high PLQYs of 62.41% and dual-color emission with two strong emission peaks around at 400–450 nm and 600 nm, respectively. The enhanced peak at 400−450 nm is a result of the hybrid halides in CsPbBrxCl3−x host. Furthermore, the unique advantage of the optical emission and high PLQYs properties of the CsPbxMn1−xCl3 QDs has been demonstrated as invisible ink for encryption applications and polymer composites. Our gram-scale synthesis approach for Mn-doped all-inorganic perovskite QDs may boost the future research and practical applications of QDs-based white LED, spintronics, and molecular barcoding.


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About this article

Gram-scale synthesis of all-inorganic perovskite quantum dots with high Mn substitution ratio and enhanced dual-color emission

Show Author's information Lvming Dong1,2,§, Zhuo Chen1,2,§, Lei Ye1,2( ), Yan Yu1,2, Jianbing Zhang1, Huan Liu1, Jianfeng Zang1,2( )
School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan,430074,China;
Innovation Institute,Huazhong University of Science and Technology,Wuhan,430074,China;

§Lvming Dong and Zhuo Chen contributed equally to this work.

Abstract

Mn-doped all-inorganic perovskite quantum dots (QDs) provide prominent applications in the fields of low-cost light source or display, because of their remarkable properties including dual-color emission and reduced lead content, as well as high photoluminescence quantum yields (PLQYs) and high stability. However, the existing synthesis approaches usually require hash conditions, such as high temperature and nitrogen protection, which is a major hurdler for the practical manufacturing. In addition, the significantly high Mn substitution ratio in CsPbX3 QDs is still challenging. The real dual-color emission with two strong emission peaks in the Mn-doped all-inorganic perovskite QDs has attracted great interest. Here we present a gram-scale approach to synthesize both CsPbxMn1−xCl3 and CsPb1−xMnxClyBr3−y QDs at 100 ℃ in the air with high Mn substitution ratio, up to 55.64% atomically. The as-prepared CsPb1−xMnxClyBr3−y QDs exhibit high PLQYs of 62.41% and dual-color emission with two strong emission peaks around at 400–450 nm and 600 nm, respectively. The enhanced peak at 400−450 nm is a result of the hybrid halides in CsPbBrxCl3−x host. Furthermore, the unique advantage of the optical emission and high PLQYs properties of the CsPbxMn1−xCl3 QDs has been demonstrated as invisible ink for encryption applications and polymer composites. Our gram-scale synthesis approach for Mn-doped all-inorganic perovskite QDs may boost the future research and practical applications of QDs-based white LED, spintronics, and molecular barcoding.

Keywords: quantum dots, gram-scale, enhanced dual-color emission, all-inorganic perovskite, invisible ink, polymer composites

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Acknowledgements

Publication history

Received: 16 September 2018
Revised: 02 May 2019
Accepted: 03 May 2019
Published: 15 May 2019
Issue date: July 2019

Copyright

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

Acknowledgements

Acknowledgements

This work was supported by the National Key Research and Development Program of China (No. 2018YFB1105100) and the National Natural Science Foundation of China (Nos. 51572096 and 61704061). We thank Flexible Electronics Research Center of HUST for carrying out the field emission scanning electron microscope measurements, and the Analytical and Testing Center in HUST for TEM, XRD, UV–vis, PL tests.

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