Water-assisted synthesis of highly stable CsPbX3 perovskite quantum dots embedded in zeolite-Y

Hui Cheng; Yanfeng Yin; Jianbo Tang; Donghua Fan; Jan J Huang; Shengye Jin

doi:10.1039/d0ra08311a

Water-assisted synthesis of highly stable CsPbX₃ perovskite quantum dots embedded in zeolite-Y

RSC Adv. 2021 Jan 13;11(5):2866-2871. doi: 10.1039/d0ra08311a. eCollection 2021 Jan 11.

Authors

Hui Cheng^{1

2}, Yanfeng Yin², Jianbo Tang², Donghua Fan¹, Jan J Huang¹, Shengye Jin²

Affiliations

¹ School of Applied Physics and Materials, Wuyi University Jiangmen 529020 China.
² National Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian China 116023.

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 Cs₄PbX₆ 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.