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首页> 外文期刊>Polymers for advanced technologies >Influence of dipolar species on charge transport in poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene]
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Influence of dipolar species on charge transport in poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene]

机译：偶极种类对聚[2-甲氧基-5-（2'-乙基己氧基）-对亚苯基亚乙烯基]中电荷传输的影响

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摘要

A theoretical study and experimental evidence for a decrease of the charge carrier mobility in poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene] (MEH-PPV) under the influence of dipolar species are presented in this paper. The presence of polar species in the vicinity of an MEH-PPV chain modifies the on-chain site energies and consequently, due to random mutual positions and orientations, increases the width of the energy distribution of the chain transport states. The influence of energetic disorder of these states on the charge carrier mobility was modeled by means of the Monte Carlo method, based on a numerical solution of the time-dependent Schrodinger equation in the tight-binding approximation. It was shown that the increasing disorder destroys the resonance between charge carrier energies on adjacent sites and, therefore, limits the diffusive charge carrier motion.
机译：本文提出了在偶极子影响下聚[2-甲氧基-5-（2'-乙基己氧基）-对亚苯基亚乙烯基]（MEH-PPV）中载流子迁移率降低的理论研究和实验证据。纸。在MEH-PPV链附近存在极性物质会修饰链上位点能量，因此，由于随机的相互位置和方向，会增加链传输态的能量分布宽度。基于紧密结合近似中时间相关的薛定inger方程的数值解，利用蒙特卡罗方法对这些状态的高能紊乱对电荷载流子迁移率的影响进行了建模。结果表明，不断增加的无序破坏了相邻位置上载流子能量之间的共振，因此限制了扩散性载流子运动。

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