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In Situ Fabrication of Superfine Perovskite Composite Nanofibers with Ultrahigh Stability by One-Step Electrospinning Toward White Light-Emitting Diode

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Abstract

All-inorganic CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) are emerging as promising candidate materials for optoelectronic devices due to their splendid optical and electrical properties. However, the intrinsic instability greatly limits their practical application. Herein, a feasible strategy is proposed for fabricating highly stable and luminescent CsPbBr3@PVDF-HFP/PS nanofibers by combining one-step electrospinning method with 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (PFDTMS)-assisted post-treatment. The bright-emitting CsPbBr3 NCs can be effectively encapsulated within polymer nanofibers, which exhibit ultrafine diameter of only 88.1 ± 2.8 nm and high photoluminescence quantum yield (PLQY) of 87.9% via rationally optimizing the electrospinning parameters, concentration of perovskite precursors and ligands. Most importantly, the superhydrophobic surface structures of nanofibers are formed by the hydrolysis and condensation of PFDTMS under moist environment. Benefiting from the double effective protection of polymer matrices and hydrophobic PFDTMS oligomers against moisture erosion, the CsPbBr3@PVDF-HFP/PS nanofibers present an obviously improved stability, which can retain 90% initial PL intensity after water immersion for 70 days. Furthermore, an efficient white light-emitting diode with wide color gamut covering 117% of National Television System Committee (NTSC) standard is successfully fabricated based on the composite nanofiber membranes, suggesting their promising prospect for solid-state lighting and display applications.

Graphical Abstract

Superfine perovskite nanofibers with efficient fluorescence and ultrahigh stability are fabricated by combining one-step electrospinning method with PFDTMS-assisted post-treatment.

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Acknowledgements

This work was partially supported from the National Key Research and Development Program of China (Grant No. 2021YFB3500504), the Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-03-E00025), the National Natural Science Foundation of China (Nos. 52073058, 52103359), Shanghai Sailing Program (Nos. 20YF1400400, 21YF1400600), the Fundamental Research Funds for the Central Universities (2232020G-07).

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Authors and Affiliations

  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials and College of Materials Science and Engineering, Donghua University, Shanghai, 201620, People’s Republic of China

    Xiaobo Hu, Jiancheng Wang, Jiaxin Ma, Lianjun Wang & Wan Jiang

  2. Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Donghua University, Shanghai, 201620, People’s Republic of China

    Lianjun Wang & Wan Jiang

  3. National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen Ceramic University, Jingdezhen, 333000, China

    Yanqiao Xu

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  1. Xiaobo Hu
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Hu, X., Xu, Y., Wang, J. et al. In Situ Fabrication of Superfine Perovskite Composite Nanofibers with Ultrahigh Stability by One-Step Electrospinning Toward White Light-Emitting Diode. Adv. Fiber Mater. 5, 183–197 (2023). https://doi.org/10.1007/s42765-022-00207-x

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