| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Water-Resistant CsPbBr3 Nanocrystal-Polymethylmethacrylate Composite Fibrous Membranes Prepared by Electrostatic Spinning |
| WANG Qi1, LI Ke1, WU Yihua1,2, ZHU Zhigang1,3, SHIH Weiheng1,4,*
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1 School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, China
2 Research Center of Resource Recycling Science and Engineering, Shanghai Polytechnic University, Shanghai 201209, China
3 School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
4 Department of Materials Science and Engineering, Drexel University, Philadelphia 19104, PA, USA |
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Abstract All-inorganic perovskite cesium-based lead halide CsPbX3 (X=Cl, Br, and I) nanocrystals have excellent optical properties such as high quantum yield, adjustable emission wavelength and narrow full width at half maximum (FWHM). Consequently, all-inorganic perovskite has become an excellent candidate for optoelectronic devices, such as light-emitting diodes (LEDs), photodetectors, solar cells and next-generation display devices. Although there are many advantages of this material, the poor stability in ambient condition greatly limits its practical applications. In this work, the precursors of nanocrystalline CsPbBr3 and polymethyl methacrylate (PMMA) were mixed together in N,N-dimethylformamide (DMF) and subsequently electrostatically spun to generate CsPbBr3@ PMMA composite eletrospun fibrous membrane (EFM) in situ. It is shown that the CsPbBr3 nanocrystals are well wrapped within the polymer fibers and are uniformly distributed. The emitted fluorescence light under excitation by ultraviolet light is uniform as well. The composite EFM can maintain 70% of the original photoluminescence intensity after being placed in deionized water for more than four months, showing excellent water stability. Compared with the traditional two-step method of using synthesized perovskite and then mixing in fiber precursor to generate air dried film (ADF), this one-step method for preparing the perovskite nanocrystal composite film not only provides a new method for preparing highly stable perovskite nanocrystalline polymer composite films but also uses fewer raw materials and the process is simple.
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Published: 25 August 2022
Online: 2022-08-29
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| Fund:Shanghai Polytechnic University Foundation for Postgraduate Programs (EGD19YJ0071). |
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2022, Vol. 36 
