Journal of Materials Chemistry C
Journal of Materials Chemistry C
4 years ago

In situ synthesis of coaxial CsPbX3@polymer (X=Cl, Br, I) fibers with significantly enhanced water stability

Wenna Liu, Hui Fu, Hao Liao, Zhao Liang, Yumin Ye, Jinju Zheng, Weiyou Yang
Inorganic perovskites (IP) CsPbX3 (X = Cl, Br, I) have rapidly emerged as excellent candidate materials for optoelectronic devices, due to their superior optical/electronic performances. However, poor stability related to their intrinsic ionic character greatly limits their practical applications. Here, a coaxial electrospinning strategy is reported for in situ growth of IP nanocrystals (NCs) in polymer fibers with core/shell structure, which is based on one-step electrospinning of core solutions containing IPs precursors and polymers while shell solutions containing polymers only. Contributed to the coaxial structure, the NCs in/out the surface of the core were further encapsulated by the shell layer. Compared with the traditional CsPbBr3@polymer fibers without shell layer, the obtained coaxial fibers exhibit fundamentally improved water stabilities. Their PL quantum yield (QY) retains beyond 90% of its original value after being immersed in water for 10 d and maintains over 84% after 180 d.

Publisher URL: http://pubs.rsc.org/en/Content/ArticleLanding/2020/TC/D0TC04035E

DOI: 10.1039/d0tc04035e

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