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Mesoscopic study of the electronic properties of thin polymer films

机译:聚合物薄膜电子性能的介观研究

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Conjugated polymers are very interesting for light emitting diodes. Further improvement in device performance requires a better understanding on the correlation between the polymer structure and device characteristics. A mesoscopic study using a generalised Monte Carlo method of bipolar charge transport in thin poly(p-phenylene-vinylene) (PPV) films is presented in this paper. We show that energy and spatial molecular disorder have a serious influence on migration of charge carriers within the polymer layer. The transfer of carriers between two polymer chains is made dependent on the chemical potential difference as well as on other features such as the distance between both molecules involved and the direction of the electric field. The purpose of the present work is to clarify the effects of local energy and polymer structural disorder on current flow, trapping and recombination on polymer based devices.
机译:共轭聚合物对于发光二极管非常有趣。器件性能的进一步改善需要对聚合物结构和器件特性之间的相关性有更好的了解。本文提出了使用广义蒙特卡洛方法在聚对苯撑乙烯撑薄膜(PPV)薄膜中进行双极性电荷传输的介观研究。我们表明能量和空间分子无序对聚合物层内的电荷载流子迁移有严重影响。载流子在两条聚合物链之间的转移取决于化学势差以及其他特征,例如所涉及的两个分子之间的距离和电场方向。本工作的目的是阐明基于聚合物的器件上的局部能量和聚合物结构紊乱对电流流动,俘获和复合的影响。

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