用于增强型有机太阳能电池的甲烷富勒烯延伸纳米结构的形成
Methanofullerene Elongated Nanostructure Formation for Enhanced Organic Solar Cells
摘要：
使用透射电子显微镜（TEM）和Z-对比度成像，我们已经证明了通过退火在有机宿主内富勒烯衍生物[6，6]-苯基-C61-丁酸甲酯（PCBM）的细长纳米结构的形成。退火提供了PCBM分子的增强的移动性，并且具有良好的初始分散，允许在聚合物主体内形成夸大的晶粒生长。我们组装这些纳米结构内的区域规则的共轭聚合物聚（3-己基噻吩）（P3 HT）。这种PCBM细长纳米结构的形成可能是在退火的光致发光材料中在非常低的PCBM负载量（1：0.6，聚合物与PCBM）下观察到的非常高的效率的原因。此外，我们的高分辨率TEM和电子能量损失谱研究清楚地表明，PCBM晶体保持结晶状态，不受200 keV电子束的影响
英文摘要：
Using transmission electron microscopy (TEM) and Z-contrast imaging we have demonstrated elongated nanostructure formation of fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) within an organic host through annealing. The annealing provides an enhanced mobility of the PCBM molecules and, with good initial dispersion, allows for the formation of exaggerated grain growth within the polymer host. We have assembled these nanostructures within the regioregular conjugated polymer poly(3-hexylthiophene) (P3HT). This PCBM elongated nanostructure formation maybe responsible for the very high efficiencies observed, at very low loadings of PCBM (1:0.6, polymer to PCBM), in annealed photovoltaics. Moreover, our high resolution TEM and electron energy loss spectroscopy studies clearly show that the PCBM crystals remain crystalline and are unaffected by the 200-keV electron beam
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