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采用液相剥离技术制备基于化学气相沉积(CVD)石墨烯/聚乙撑二氧噻吩-聚苯乙烯磺酸(PEDOT-PSS)共混复合材料的导电薄膜。采用原子力显微镜、SEM表征石墨烯/PEDOT-PSS复合薄膜的微观结构;通过紫外吸收谱、X射线光电子能谱、FTIR等分析技术探索该共混复合薄膜的导电机制。结果表明:石墨烯/PEDOT-PSS导电薄膜具有优异的电学特性,其方阻约为8?/□;表面分析表明,石墨烯与PEDOT主链中五元噻吩发生π-π共轭效应,由此引起两作用体之间电子云密度的变化,该变化增加了PEDOT主链的载流子离域化程度,有利于PEDOT导电性的提升,同时提高石墨烯的载流子浓度,使CVD石墨烯/PEDOT-PSS复合薄膜的导电能力增强。
Conductive thin films based on chemical vapor deposition (CVD) graphene / polyethylenedioxythiophene-polystyrenesulfonic acid (PEDOT-PSS) blends were prepared by liquid phase stripping technique. The microstructure of graphene / PEDOT-PSS composite films was characterized by atomic force microscopy and SEM. The conductivity of the composite films was investigated by UV absorption, X-ray photoelectron spectroscopy and FTIR. The results show that the graphene / PEDOT-PSS conductive films have excellent electrical properties with a square resistance of about 8? / □. The surface analysis shows that π-π conjugation between graphene and the five-membered thiophene in the main chain of PEDOT results from This results in a change in the electron cloud density between the two actors, which increases the degree of carrier delocalization of the PEDOT main chain, is conducive to enhancing the conductivity of PEDOT, and simultaneously increases the carrier concentration of graphene so that CVD graphite The conductivity of the olefin / PEDOT-PSS composite film is enhanced.