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Highly Stable CsPbX 3 /PbSO 4 Core/Shell Nanocrystals Synthesized by a Simple Post‐Treatment Strategy
Author(s) -
Zhong Qixuan,
Liu Jun,
Chen Shuhua,
Li Pengli,
Chen Jianian,
Guan Wenhao,
Qiu Yinghua,
Xu Yong,
Cao Muhan,
Zhang Qiao
Publication year - 2021
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202001763
Subject(s) - materials science , nanocrystal , halide , nanoshell , nanotechnology , chemical engineering , nanoparticle , inorganic chemistry , chemistry , engineering
All‐inorganic lead halide perovskite (CsPbX 3 , X = Cl, Br, I, or their mixture) nanocrystals (NCs) have recently emerged as a promising photoelectric material; however, developing highly stable CsPbX 3 NCs still remains a challenge due to their intrinsic ionic nature. This work presents a simple and facile post‐treatment strategy to encapsulate CsPbX 3 NC with PbSO 4 nanoshell at single‐particle level. Compared to pristine CsPbX 3 NCs, the as‐prepared CsPbX 3 /PbSO 4 NCs exhibit significant enhancement in the optical properties. Benefiting from the efficient protection of inert PbSO 4 nanoshell, the obtained CsPbX 3 /PbSO 4 core/shell NCs demonstrate great stability against polar solvents, including ethanol and acetone, and light irradiation. Furthermore, anion‐exchange reaction is strongly restricted upon the encapsulation of PbSO 4 shell. This work provides an alternative approach for the synthesis of highly stable CsPbX 3 NCs, and paves a new way for the preparation of core/shell heterostructures based on lead halide perovskite NCs.