Dong Qizheng, Zhu Xueyou, Wang Yuanyuan, He Ling
State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China; School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China.
State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China; School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Nov 15;321:124742. doi: 10.1016/j.saa.2024.124742. Epub 2024 Jun 27.
Afterglow materials face limitations in color variety, low luminosity, and stability. Thus, developing materials with adjustable afterglow color, increased photoluminescence (PL) intensity, and enhanced stability is crucial. This paper reports the fabrication of a series of core-shell composites, CPB@SMSO@SiO, which combine SrMgSiO: Eu, Dy (SMSO) and lead halide perovskite quantum dots (CsPbBr/CPB PeQDs) through a process involving in-situ growth and hydrolytic coating. The SMSO in the composite can absorb 365 nm UV light and then emit 470 nm light, which can be absorbed by the CsPbBr PeQDs, resulting in an overall increase in the PL intensity of the composite. The afterglow color can be turned from green to blue by adjusting the ratio of SMSO and CsPbBr. Furthermore, the stability of the composites is improved by the SiO shell layer formed by hydrolysis of tetramethyl orthosilicate (TMOS). This study presents an opportunity to develop innovative afterglow materials.
余辉材料在颜色种类、低发光度和稳定性方面存在局限性。因此，开发具有可调节余辉颜色、提高光致发光（PL）强度和增强稳定性的材料至关重要。本文报道了一系列核壳复合材料CPB@SMSO@SiO的制备，该复合材料通过原位生长和水解包覆过程将SrMgSiO:Eu,Dy（SMSO）和卤化铅钙钛矿量子点（CsPbBr/CPB PeQDs）结合在一起。复合材料中的SMSO可以吸收365nm的紫外光，然后发射470nm的光，这可以被CsPbBr PeQDs吸收，从而使复合材料的PL强度总体增加。通过调整SMSO和CsPbBr的比例，余辉颜色可以从绿色变为蓝色。此外，由原硅酸四甲酯（TMOS）水解形成的SiO壳层提高了复合材料的稳定性。本研究为开发创新型余辉材料提供了契机。
