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首页> 外文期刊>RSC Advances >Carbon dots in ZnO macroporous films with controlled photoluminescence through defects engineering
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Carbon dots in ZnO macroporous films with controlled photoluminescence through defects engineering

机译：ZnO大孔膜中的碳点通过缺陷工程控制光致发光

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Carbon-dots (C-dots) nanocomposites represent a new frontier for highly efficient light-emitting materials with tunable colors in a wide range of the visible spectral region. We have developed a C-dots–ZnO system and the emission is finely controlled through material processing. The C-dots, besides being fluorophores, become a tool for modulating the defects in a ZnO matrix through chemical interactions. Macroporous ZnO films have been prepared via a hard templating route using mesoporous silica spheres which allows full crystallization of the ZnO framework and post-impregnation of large amounts of C-dots within the porous matrix. The photoluminescence spectra are given by a combination of different contributions: C-dots, UV near-band and defect-related ZnO emissions. The reducing action of the C-dots in the ZnO porous matrix allows engineering of the defect-related ZnO emissions. The chromaticity of the nanocomposite, from orange to purple and white, is controlled by adjusting the amounts of C-dots through post-impregnation.
机译：碳点（C点）纳米复合材料代表一种新的前沿，用于高效的发光材料，具有可调谐颜色在宽范围的可见光谱区域中。我们开发了C-Dots-ZnO系统，通过材料处理精细地控制了排放。除了荧光团之外，C点是通过化学相互作用调节ZnO基质中缺陷的工具。通过使用介孔二氧化硅球通过硬模具途径制备大孔ZnO膜，其允许ZnO框架的全结晶和在多孔基质内的大量C点的后浸渍。通过不同贡献的组合给出光致发光光谱：C点，UV近带和缺陷相关的ZnO排放。 C点在ZnO多孔基质中的减少作用允许缺陷相关的ZnO排放的工程。通过在浸渍后调节C点的量来控制纳米复合材料的色度，从橙色到紫色和白色。

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