材料科学
纳米晶
纳米壳
卤化物
纳米技术
化学工程
纳米颗粒
无机化学
化学
工程类
作者
Qixuan Zhong,Jun Liu,Shuhua Chen,Pengli Li,Jianian Chen,Wenhao Guan,Yuzhuo Qiu,Yong Xu,Muhan Cao,Qiao Zhang
标识
DOI:10.1002/adom.202001763
摘要
Abstract 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.
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