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首页> 外文期刊>Advanced Functional Materials >Nanoscale characterization of the morphology and electrostatic properties of poly(3-octylthiophene)/graphite-nanoparticle blends
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Nanoscale characterization of the morphology and electrostatic properties of poly(3-octylthiophene)/graphite-nanoparticle blends

机译：聚（3-辛基噻吩）/石墨-纳米颗粒共混物的形貌和静电性能的纳米表征

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摘要

Mixtures of poly(3-octylthiophene) (P3OT) with graphite nanoparticles have been investigated by scanning force microscopy (SFM) techniques. The morphology as well as the mechanical and electrical properties of the blends has been characterized at the nanoscale level as a function of the carbon nanoparticle content in the blend. An increase in the concentration of carbon nanoparticles results in an increase in the surface roughness of the blend and the appearance of distinct regions with well-defined electrical and mechanical properties. At intermediate concentrations (5-10 wt % of carbon nanoparticles), the samples show pure P3OT regions, as well as round regions containing a mixture of the polymer and carbon nanoparticles, while at higher concentrations (> 15 wt %), the entire sample is composed of this mixture. The interface between the two regions has been studied by electrostatic scanning force microscopy (ESFM) as a function of the applied tip-sample voltage. ESFM provides evidence for the creation of new electronic states at the heterojunction. The observed results can be qualitatively explained in terms of the electronic properties of the individual molecular components, P3OT, functionalized graphite nanoparticles, and their corresponding heterojunction. The implications of these results for organic polymer solar cells are also discussed.
机译：聚（3-辛基噻吩）（P3OT）与石墨纳米颗粒的混合物已通过扫描力显微镜（SFM）技术进行了研究。共混物的形态以及机械和电学性质已在纳米级表征为共混物中碳纳米颗粒含量的函数。碳纳米颗粒浓度的增加会导致共混物的表面粗糙度增加，并出现具有明确电气和机械性能的不同区域。在中等浓度（碳纳米颗粒的5-10 wt％）下，样品显示纯P3OT区域，以及包含聚合物和碳纳米颗粒混合物的圆形区域，而在较高浓度（> 15 wt％）下，整个样品由这种混合物组成。静电扫描力显微镜（ESFM）已研究了两个区域之间的界面随所施加的尖端采样电压的变化。 ESFM为在异质结处创建新的电子态提供了证据。可以根据单个分子组分，P3OT，官能化石墨纳米颗粒及其相应的异质结的电子性质定性解释观察到的结果。还讨论了这些结果对有机聚合物太阳能电池的影响。

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