College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumqi 830052, China.
Molecules. 2023 Jun 27;28(13):5021. doi: 10.3390/molecules28135021.
The specific structure and diverse properties of hybrid organic-inorganic perovskite materials make them suitable for use in photovoltaic and sensing fields. In this study, environmentally stable organic-inorganic hybrid perovskite luminescent materials using Pb-MOF as a particular lead source were prepared using a mechanochemical method. Based on the fluorescence intensity of the MAPbBr/MOF composite, the mechanized chemical preparation conditions of Pb-MOF were optimized using response surface methodology. Then, the morphological characteristics of the MAPbBr/MOF composite at different stages were analyzed using electron microscopy to explore its transformation and growth process. Furthermore, the composite form of MAPbBr with Pb-MOF was studied using XRD and XPS, and the approximate content of MAPbBr in the composite material was calculated. Benefiting from the increase in reaction sites generated from the crush of Pb-MOF during mechanical grinding, more MAPbBr was generated with a particle size of approximately 5.2 nm, although the morphology of the composite was significantly different from the initial Pb-MOF. Optimal performance of MAPbBr/MOF was obtained from Pb-MOF prepared under solvent-free conditions, with a milling time of 30 min, milling frequency of 30 Hz and ball-material of 35:1. It was also confirmed that the mechanochemical method had a good universality in preparing organic-inorganic hybrid perovskite/MOF composites.
具有特定结构和多样性质的杂化有机-无机钙钛矿材料使其适用于光伏和传感领域。本研究使用 Pb-MOF 作为特定的铅源，采用机械化学法制备了环境稳定的有机-无机杂化钙钛矿发光材料。基于 MAPbBr/MOF 复合材料的荧光强度，利用响应面法优化了 Pb-MOF 的机械化学制备条件。然后，利用电子显微镜分析了 MAPbBr/MOF 复合材料在不同阶段的形态特征，以探究其转化和生长过程。此外，通过 XRD 和 XPS 研究了 MAPbBr 与 Pb-MOF 的复合形式，并计算了复合材料中 MAPbBr 的近似含量。得益于机械研磨过程中 Pb-MOF 破碎产生的反应位点增加，生成了更多粒径约为 5.2nm 的 MAPbBr，但复合材料的形态与初始 Pb-MOF 有明显差异。在无溶剂条件下制备的 Pb-MOF 中，MAPbBr/MOF 的性能最佳，其最佳制备条件为：无溶剂、研磨时间 30min、研磨频率 30Hz、球料比 35:1。同时还证实了机械化学法在制备有机-无机杂化钙钛矿/ MOF 复合材料方面具有很好的通用性。
