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首页> 外文期刊>Journal of Applied Polymer Science >Functionalized graphene nanoplatelets as a barrier enhancing filler in organic photovoltaic encapsulant
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Functionalized graphene nanoplatelets as a barrier enhancing filler in organic photovoltaic encapsulant

机译：官能化的石墨烯纳米键作为有机光伏密封剂中的屏障增强填充剂

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摘要

This research work has concerned the development of polymer films, reinforced with graphene nanoplatelets (GNP) for use as encapsulating films for organic photovoltaic (OPV) cells. The aim of this work was to investigate the effects of concentrations and orientations of GNP on mechanical, optical, and barrier properties of polymer composite films. In this regard, the neat GNP was modified with Fe3O4 prior to mixing with acrylate-based monomers. The mixture was then cured by photo-polymerization with and without the application of magnetic fields. Changes in orientation of the functionalized GNP with the direction of applied magnetic fields were analyzed by optical microscopy, scanning electron microscopy, and transmission electron microscopy. From the results, it was found that by inducing the orientation of functionalized GNP to the horizontal direction (with respect to the OPV cell), the great enhancement in tensile and barrier properties of the polymer composite films was achieved. This led to the longer performance of the OPV cell encapsulated with the nanocomposite film with 0.1 phr of the horizontally oriented GNP in comparison with the OPV cell encapsulated with the film reinforced with randomly oriented GNP at the same content.
机译：这项研究工作涉及到用石墨烯纳米片（GNP）增强的聚合物薄膜的开发，用于有机光伏（OPV）电池的封装薄膜。本研究的目的是研究GNP的浓度和取向对聚合物复合膜的机械、光学和阻隔性能的影响。在这方面，在与丙烯酸酯类单体混合之前，用Fe3O4对净GNP进行改性。然后，该混合物通过光聚合在施加和不施加磁场的情况下固化。通过光学显微镜、扫描电子显微镜和透射电子显微镜分析了功能化GNP的取向随外加磁场方向的变化。结果发现，通过将功能化GNP定向到水平方向（相对于OPV电池），聚合物复合膜的拉伸和阻隔性能得到了极大的提高。这导致用含有0.1份水平取向GNP的纳米复合薄膜封装的OPV电池与用相同含量的随机取向GNP增强的薄膜封装的OPV电池相比，性能更长。

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