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Preparation of CsPbBr3@PS composite microspheres with high stability by electrospray

Abstract

Cesium lead halide perovskite quantum dots (PQDs) have attracted great interest due to their excellent optical properties. However, PQDs are easy to degradation under moisture or polar solvent, which greatly hinders their practical applications. In this paper, ultrastable and highly luminescent CsPbBr3@PS microspheres with uniform morphology are prepared via a simple and efficient electrospray method. As a result, the as-prepared CsPbBr3@PS microspheres not only retain excellent luminescence properties of CsPbBr3 PQDs, but also exhibit superior stability against anion-exchange and water. After being immersed into water for 30 days, the CsPbBr3@PS microspheres still emit strong luminescence without obvious change. When contacted with KI solution, the photoluminescence (PL) intensity of CsPbBr3@PS microspheres changed very little and the PL wavelength have no shift after 9 hours. Furthermore, the applications of CsPbBr3@PS microspheres in light-emitting diodes are also carried out to demonstrate their ultrastability in water. This facile and versatile method of protecting PQDs by electrospray opens new possibilities for applications in aqueous phase such as cell imaging.

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Publication details

The article was received on 25 Mar 2018, accepted on 03 May 2018 and first published on 04 May 2018


Article type: Communication
DOI: 10.1039/C8TC01408F
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Preparation of CsPbBr3@PS composite microspheres with high stability by electrospray

    X. Yang, T. Xu, Y. Zhu, J. Cai, K. Gu, J. Zhu, Y. Wang, J. Shen and C. Li, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01408F

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