Water-assisted synthesis of highly stable CsPbX3 perovskite quantum dots embedded in zeolite-Y. Issue 5 (13th January 2021)

• Record Type: Journal Article
• Authors: Cheng, Hui; Yin, Yanfeng; Tang, Jianbo; Fan, Donghua; Huang, Jan J.; Jin, Shengye
• Is Part Of: RSC advances. Volume 11:Issue 5(2021)
• Page Start: 2866
• Page End: 2871
• Publication Date: 2021-01-13
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra08311a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Embedding CsPbX3 in zeolite-Y results in significantly enhanced stability and tunable emission upon exposure to water. Abstract : All-inorganic perovskite materials have emerged as highly promising materials for solar cells and photoelectronic applications. However, the poor stability of perovskites in ambient conditions significantly hampers their practical applications. In this work, we report a three-step synthesis of size tunable CsPbX3 (X = Br, Cl, or I) quantum dots (QDs) embedded in zeolite-Y (CsPbX3 -Y), which involves efficient chemical transformation of non-luminescent Cs4 PbX6 to highly luminescent CsPbX3 by stripping CsX through an interfacial reaction with water. We show that the size and the emission of CsPbX3 in CsPbX3 -Y can be tuned by the amount of water added as well as the halide composition. More importantly, the as-prepared CsPbX3 -Y show significantly enhanced stability against moisture upon protection by zeolite-Y. This work not only reports a new pathway for the preparation of highly luminescent CsPbX3 but also provided new insights into the chemical transformation behavior and stabilization mechanism of these emerging perovskites.