Issue 40, 2020

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

Abstract

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 significantly limits their practical applications. Here, a coaxial electrospinning strategy was reported for in situ growth of IP nanocrystals (NCs) in polymer fibers with core/shell structure. The said strategy was based on one-step electrospinning of core solutions containing IP precursors and polymers while the shell solutions containing polymers only contributed to the coaxial structure. The NCs moving in/out of the surface of the core were encapsulated by the shell layer. Compared with the traditional CsPbBr3@polymer fibers without the shell layer, the obtained coaxial fibers exhibited fundamentally improved water stabilities. Their PL quantum yield (QY) retained >90% of its original value after being immersed in water for 10 days and maintained at >84% after 180 days.

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

Supplementary files

Article information

Article type
Communication
Submitted
25 Leq 2020
Accepted
24 Way 2020
First published
26 Way 2020

J. Mater. Chem. C, 2020,8, 13972-13975

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

W. Liu, H. Fu, H. Liao, Z. Liang, Y. Ye, J. Zheng and W. Yang, J. Mater. Chem. C, 2020, 8, 13972 DOI: 10.1039/D0TC04035E

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