In-situ Post-Synthetic Treatment of CsPbBr3 Perovskite Nano-crystals in Nanoporous Silica Microspheres

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外文摘要：Inorganic lead halide perovskite(LHP)nanostructures,represented by formula CsPbX3(X=Cl,Br,I),have garnered considerable inter-est for their exceptional optical properties and diverse applications.Despite their potential,challenges such as environmental degra-dation persist.In-situ synthesis within protective materials pores is a promising way to address this issue.However,confining perov-skite nanostructures into porous matrices during the synthesis can limit their photoluminescence quantum yield(PL QY)and tunability of optical properties.Various post-treatment approaches exist to improve the properties of LHP and achieve their desired functionali-ties,but these strategies have not been explored for LHP confined in mesoporous matrices.Here,we demonstrate the efficacy of in-situ post-synthetic treatments to improve the optical properties of CsPbBr3 nanocrystals grown in nanoporous silica microspheres.Surface passivation with Br-ion-containing precursors boosts PL QY,while anion-assisted cation doping with Mn2+ions introduces a new PL band.The adjustment of precursor amount and doping duration enables precise control over the optical properties of LHP,while additional coating with a SiO2 shell enhances their stability in polar solvents,expanding the potential applications of these com-posites.

外文关键词：

Perovskite nanocrystalsIn-situ synthesisMesoporous materialsDefect passivationAnion-assisted cation dopingSilica microspheres

作者：

Danila A.Tatarinov、Jinfeng Xie、Qingyi Qian、Qingqing Wang、Nadezhda A.Maslova、Lyubov'N.Borodina、Aleksandr P.Litvin、He Huang

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作者单位：

School of Optoelectronic Science and Engineering,Soochow University,Suzhou,Jiangsu 215006,China

PhysNano Department,ITMO University,St.Petersburg,197101 Russia

Research Park,Saint Petersburg State University,St.Petersburg,199034 Russia

School of Materials Science and Engineering,Jilin University,Changchun,Jilin 130012,China

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出版年：

2024

DOI：

10.1002/cjoc.202400513

中国化学(英文版)

中国化学会上海有机化学研究所

中国化学(英文版)

CSTPCD

影响因子：0.848

ISSN：1001-604X

年,卷(期)：2024.42(22)