TY - JOUR

T1 - In -situ Post -Synthetic Treatment of CsPbBr3 Perovskite Nanocrystals in Nanoporous Silica Microspheres

AU - Tatarinov, D. A.

AU - Xie, Jinfeng

AU - Qian, Qingyi

AU - Wang, Qingqing

AU - Маслова, Надежда Артемовна

AU - Borodina, Lyubov'

AU - Litvin, Aleksandr P.

AU - Huang, He

PY - 2024/11/15

Y1 - 2024/11/15

N2 - Inorganic lead halide perovskite (LHP) nanostructures, represented by formula CsPbX3 (X = Cl, Br, I), have garnered considerable interest for their exceptional optical properties and diverse applications. Despite their potential, challenges such as environmental degradation persist. In-situ synthesis within protective materials pores is a promising way to address this issue. However, confining perovskite 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 functionalities, 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 composites.

AB - Inorganic lead halide perovskite (LHP) nanostructures, represented by formula CsPbX3 (X = Cl, Br, I), have garnered considerable interest for their exceptional optical properties and diverse applications. Despite their potential, challenges such as environmental degradation persist. In-situ synthesis within protective materials pores is a promising way to address this issue. However, confining perovskite 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 functionalities, 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 composites.

KW - Anion-assisted cation doping

KW - Defect passivation

KW - In-situ synthesis

KW - Mesoporous materials

KW - Perovskite nanocrystals

KW - Silica microspheres

UR - https://www.mendeley.com/catalogue/2c41cb08-d32e-317b-b73a-2820bc134d43/

U2 - 10.1002/cjoc.202400513

DO - 10.1002/cjoc.202400513

M3 - Article

VL - 42

SP - 2779

EP - 2787

JO - Chinese Journal of Chemistry

JF - Chinese Journal of Chemistry

SN - 1001-604X

ER -