Enhanced fluorescence and stability of CsPbBr3 perovskite nanocrystals via MOF-5 encapsulation with hierarchical pore structures

作者：Yiyuan Peng, Mengbiao Liang, Ting Chen, Mengdi Zhao, Zhixiang Xie, Chunxian Guo · 发表于：Ceramics International · 年份：2025 · DOI：10.1016/j.ceramint.2025.04.374 · 被引用次数：8 · 研究领域：Perovskite Materials and Applications、2D Materials and Applications、Luminescence Properties of Advanced Materials

All-inorganic perovskite nanocrystals (CsPbX 3 NCs, X = Cl, Br, I) have emerged as promising candidates for applications in light-emitting diodes (LEDs), solar cells, photodetectors , and backlight displays, owing to their exceptional optoelectronic properties, including high photoluminescence quantum yield (PLQY), long carrier lifetimes, and narrow emission bandwidths. However, the intrinsic ionic nature of these nanocrystals renders them highly susceptible to environmental degradation, limiting their practical applications. Herein, we report the synthesis of CsPbBr 3 @MOF-5 composites through a physical mixing method: room-temperature supersaturated recrystallization of CsPbBr 3 NCs, followed by encapsulation within a hierarchical porous zinc-based metal-organic framework (MOF-5). By incorporating poly(ethylene oxide)-block-poly(propyleneoxide)-block-poly(ethylene oxide) Pluronic (P123) and 1,3,5-trimethylbenzene (TMB) as structure-directing agents, the pore architecture of MOF-5 was tailored to exhibit hierarchical porosity (2–35 nm), significantly enhancing both the PLQY and stability of CsPbBr 3 NCs. The CsPbBr 3 @MOF-5 composites achieved a remarkable PLQY improvement from 22 % to 56 %, retained 55 % of their initial PL intensity after 60 days of ambient storage, and maintained 65 % of PL emission under thermal stress (298–498 K). In contrast, pristine CsPbBr 3 NCs experienced complete quenching under identical conditions. Additionally, the composite exhibited superior ...