In situ synthesis of coaxial CsPbX3@polymer (X = Cl, Br, I) fibers with significantly enhanced water stability. Issue 40 (8th October 2020)

• Record Type: Journal Article
• Authors: Liu, Wenna; Fu, Hui; Liao, Hao; Liang, Zhao; Ye, Yumin; Zheng, Jinju; Yang, Weiyou
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 40(2020)
• Page Start: 13972
• Page End: 13975
• Publication Date: 2020-10-08
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tc04035e
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : In situ synthesis of coaxial CsPbX3 @polymer (X = Cl, Br, I) fibers with significantly enhanced water stability by one-step electrospinning method. 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.