Enhancing the Stability of CH3NH3PbBr3 Nanoparticles Using Double Hydrophobic Shells of SiO2 and Polyvinylidene Fluoride.

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2019
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Abstract
The instability of lead halide perovskites (LHPs) has tremendously hindered their practical applications. Despite some examples on encapsulating LHPs into a SiO2 shell has been reported, these SiO2-coated LHPs still suffer from limited stability. Herein, MAPbBr3 (MA = CH3NH3+) nanoparticles encapsulated in double hydrophobic shells of organic functionalized SiO2 and polyvinylidene fluoride (MAPbBr3@SiO2/PVDF) are successfully synthesized by infiltrating the MAPbBr3 precursor solution into hollow siliceous nanospheres and followed by PVDF capping. With the dual-protection of SiO2 and PVDF, the MAPbBr3@SiO2/PVDF nanoparticles exhibit drastically improved stability against water and UV-light illumination. A white light-emitting diode with luminous efficiency up to 147.5 lm W-1 and a color gamut encompassing 120% of NTSC in CIE 1931 color space has been demonstrated using the MAPbBr3@SiO2/PVDF nanoparticles as the green light source. This study enlightens new insights in the synthesis of highly stable LHPs-based core/shell/shell architectures toward their practical applications.
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huang2019enhancing Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Huang, Yipeng;Li, Feiming;Qiu, Linghang;Lin, Fangyuan;Lai, Zhiwei;Wang, Shuya;Lin, Longhui;Zhu, Yimeng;Wang, Yiru;Jiang, Yaqi;Chen, Xi;
Journal ACS applied materials & interfaces
Year 2019
DOI
10.1021/acsami.9b07841
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