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Nano Research 2023, 16(7): 10507-10514 https://doi.org/10.1007/s12274-023-5489-1
Flagship Article | Issue | Published: 27 February 2023

Organic polystyrene and inorganic silica double shell protected lead halide perovskite nanocrystals with high emission efficiency and superior stability

Show Author's Information Shujian Wang1,2,  Dejian Chen3,4,  Kunyuan Xu3,4,  Jie Hu3,4,  Decai Huang3,4,  Maochun Hong1,2,3,4( ),  Haomiao Zhu1,2,3,4( )
University of Science and Technology of China, Hefei 230026, China
Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Research Center of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
Keywords:
core–shell structure, high stability, organic polystyrene (PS) inorganic SiO2 double shell, CsPbBr3@SiO2@PS nanocrystals (NCs)
Topics:
Display devices LuminescenceSemiconductor quantum dots
Cite this article:
Wang S, Chen D, Xu K, et al. Organic polystyrene and inorganic silica double shell protected lead halide perovskite nanocrystals with high emission efficiency and superior stability. Nano Research, 2023, 16(7): 10507-10514. https://doi.org/10.1007/s12274-023-5489-1
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Abstract Full text Electronic supplementary material About this article

The practical application of all-inorganic semiconductor lead halide perovskite nanocrystals (LHP NCs) has been limited by their poor stability. Recently, a lot of research on core–shell structure has been done to improve the stability of perovskite NCs, but the effect was far from the application requirements. Herein, we, for the first time, report a convenient approach to synthesize organic–inorganic double shell CsPbBr3@SiO2@polystyrene (PS) NCs with an inter-core of CsPbBr3, the intermediate layer of SiO2 shell, and outmost PS shell. Particularly, the CsPbBr3@SiO2@PS NCs maintained more than 90% of their initial photoluminescence (PL) intensity under one month's ultraviolet lamp irradiation or in 85 °C and 85% relative humidity (RH) condition. The white-light-emitting-diodes (WLEDs) were fabricated by encapsulating commercial InGaN chip with CsPbBr3@SiO2@PS NCs and K2SiF6:Mn4+ (KSF:Mn4+) phosphor with a luminous efficacy of ~ 100 lm/W at 20 mA current and a color gamut of 128% of the National Television Standards Committee (NTSC) standard. In addition, these WLEDs still maintain 91% of the initial luminous efficacy after 1200 h of continuous lighting. These results demonstrated that double shell-protected CsPbBr3 perovskite NCs have great potential in the field of WLEDs.


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About this article

Organic polystyrene and inorganic silica double shell protected lead halide perovskite nanocrystals with high emission efficiency and superior stability

Show Author's information Shujian Wang1,2, Dejian Chen3,4, Kunyuan Xu3,4, Jie Hu3,4, Decai Huang3,4, Maochun Hong1,2,3,4( ), Haomiao Zhu1,2,3,4( )
University of Science and Technology of China, Hefei 230026, China
Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Research Center of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China

Abstract

The practical application of all-inorganic semiconductor lead halide perovskite nanocrystals (LHP NCs) has been limited by their poor stability. Recently, a lot of research on core–shell structure has been done to improve the stability of perovskite NCs, but the effect was far from the application requirements. Herein, we, for the first time, report a convenient approach to synthesize organic–inorganic double shell CsPbBr3@SiO2@polystyrene (PS) NCs with an inter-core of CsPbBr3, the intermediate layer of SiO2 shell, and outmost PS shell. Particularly, the CsPbBr3@SiO2@PS NCs maintained more than 90% of their initial photoluminescence (PL) intensity under one month's ultraviolet lamp irradiation or in 85 °C and 85% relative humidity (RH) condition. The white-light-emitting-diodes (WLEDs) were fabricated by encapsulating commercial InGaN chip with CsPbBr3@SiO2@PS NCs and K2SiF6:Mn4+ (KSF:Mn4+) phosphor with a luminous efficacy of ~ 100 lm/W at 20 mA current and a color gamut of 128% of the National Television Standards Committee (NTSC) standard. In addition, these WLEDs still maintain 91% of the initial luminous efficacy after 1200 h of continuous lighting. These results demonstrated that double shell-protected CsPbBr3 perovskite NCs have great potential in the field of WLEDs.

Keywords: core–shell structure, high stability, organic polystyrene (PS) inorganic SiO2 double shell, CsPbBr3@SiO2@PS nanocrystals (NCs)

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Publication history
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Acknowledgements

Publication history

Received: 01 November 2022
Revised: 09 January 2023
Accepted: 10 January 2023
Published: 27 February 2023
Issue date: July 2023

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was supported by the Priority Research Project of Xiamen (No. 3502Z20191015), the Science and Technology Major Project of Fujian Province (No. 2021HZ021013), and the Major Research Project of Mindu Innovation Laboratory (No. 2021ZZ114).

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