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Synthesis and optical properties of composite films from P3HT and sandwich-like Ag-C-Ag nanoparticles

机译：P3HT与夹心型Ag-C-Ag纳米颗粒复合膜的合成及光学性能

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Sandwich-like Ag-C-Ag nanoparticles (Ag-C-Ag NPs) were synthesized under mild hydrothermal conditions in a one-step method. With this approach, Ag was not only encapsulated in the centre of an individual carbon nanosphere, but was also uniformly dispersed within the carbon matrix up to the sphere's shell. Then, poly(3-hexylthiophene): Ag-C-Ag NPs (P3HT: Ag-C-Ag NPs) composite films were prepared by a spin coating method with a chlorobenzene solution of Ag-C-Ag NPs and P3HT. Both morphology and microstructure of Ag-C-Ag NPs were investigated by field emission scanning electron microscopy and high resolution transmission electron microscopy. The possible formation mechanism was proposed. The results have indicated that the Ag-C-Ag NPs present many functional groups and their energy levels match with those of P3HT. It has been observed that an introduction of Ag-C-Ag NPs to P3HT can induce broad and high-absorbing spectra as well as great photoluminescence quenching of P3HT. It is evident that sandwich-like Ag-C-Ag NPs have a great potential to be a new acceptor material in photovoltaic devices.
机译：在温和的水热条件下，一步法合成三明治状的Ag-C-Ag纳米颗粒（Ag-C-Ag NPs）。通过这种方法，Ag不仅被封装在单个碳纳米球的中心，而且均匀地分散在碳基质中，直至球的壳。然后，通过旋涂法用Ag-C-Ag NPs的氯苯溶液和P3HT制备聚（3-己基噻吩）：Ag-C-Ag NPs（P3HT：Ag-C-Ag NPs）复合膜。通过场发射扫描电子显微镜和高分辨率透射电子显微镜研究了Ag-C-Ag纳米颗粒的形貌和微观结构。提出了可能的形成机理。结果表明，Ag-C-Ag NPs存在许多官能团，其能级与P3HT的能级相匹配。已经观察到，将Ag-C-Ag NPs引入P3HT可以诱导宽且高吸收的光谱，以及P3HT的巨大光致发光猝灭。显然，类似三明治的Ag-C-Ag NP具有很大的潜力，可以成为光伏器件中的新型受体材料。

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