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

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 applicatio...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2020-10, Vol.8 (40), p.13972-13975
Main Authors: Liu, Wenna, Fu, Hui, Liao, Hao, Zhao, Liang, Ye, Yumin, Zheng, Jinju, Yang, Weiyou
Format: Article
Language:English
Subjects:
Chemical synthesis
Core-shell structure
Electrospinning
Fibers
Materials selection
Nanocrystals
Optoelectronic devices
Perovskites
Polymers
Prepolymers
Shells
Water stability
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Summary: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.
ISSN:2050-7526
2050-7534
DOI:10.1039/d0tc04035e