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Electrical and optical properties of conducting polymer-fullerene and conducting polymer-carbon nanotube composites

机译:导电聚合物-富勒烯和导电聚合物-碳纳米管复合材料的电学和光学性质

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摘要

Various novel photo-physical properties such as a drastic photoluminescence quenching and photoconductivity enhancement and a photo-induced enhancement of low-field microwave absorption due to a highly effective photo-induced electron transfer have been observed in various conducting polymers doped with fullerenes and also acceptor-type molecules and conducting polymers. New types of junction devices utilizing effective charge separation at the interface of conducting polymer/C_(60), C_(60)-doped conducting polymer/C_(60) and acceptor type conducting polymer / donor type conducting polymer have been proposed and their novel characteristics have been demonstrated. Novel concepts such as an interpenetrating network, a condensed interface and effect of introduction of photo-harvesting antenna molecule at the interface have been discussed. Nano-composite films of carbon nanotube (NT) and conducting polymer were prepared. With increasing the volume fraction of NT in conducting polymer the conductivity increases drastically at relatively low concentration of NT, which can be explained in terms of conduction by percolation process. Enhancement of photoconductivity of composite films has been found at near percolation threshold. Heterojunctions made of carbon NT and conducting polymer have also been found to be photosensitive.
机译:在掺有富勒烯和受体的各种导电聚合物中,还观察到了各种新颖的光物理性质,例如剧烈的光致发光猝灭和光电导增强以及由于高效的光诱导电子转移而引起的低场微波吸收的光诱导增强。型分子和导电聚合物。已经提出了在导电聚合物/ C_(60),掺杂C_(60)的导电聚合物/ C_(60)和受体型导电聚合物/供体型导电聚合物的界面上利用有效电荷分离的新型结器件。特性已得到证明。讨论了诸如互穿网络,压缩接口和在接口处引入光捕获天线分子的效果等新概念。制备了碳纳米管和导电聚合物的纳米复合膜。随着NT在导电聚合物中的体积分数的增加,在相对较低的NT浓度下电导率急剧增加,这可以通过渗滤过程的导电来解释。已经发现复合膜的光电导性在接近渗透阈值附近增强。还发现由碳NT和导电聚合物制成的异质结是光敏的。

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