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首页> 外文期刊>Physical review >Universal carrier thermoelectric-transport model based on percolation theory in organic semiconductors
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Universal carrier thermoelectric-transport model based on percolation theory in organic semiconductors

机译：基于渗流理论的有机半导体通用载流子热电传输模型

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摘要

Recent measurements conducted over a large range of temperature and carrier density have found that the Seebeck coefficient exhibits an approaching disorder-free transport feature in high-mobility conjugated polymers [D. Venkateshvaran et al., Nature 515, 384 (2014)]. It is difficult for the current Seebeck coefficient model to interpret the feature of the charge transport approaching disorder-free transport. We present a general analytical model to describe the Seebeck effect for organic semiconductors based on the hopping transport and percolation theory. The proposed model can well explain the Seebeck feature of the polymers with approaching disorder-free transport, as well as that of the organic semiconductors with the general disorder. The simulated results imply that the Seebeck coefficient in the organic semiconductors would happen to transfer from temperature dependence to temperature independence with the decrease of the energetic disorder.
机译：最近在较大温度和载流子密度范围内进行的测量发现，塞贝克系数在高迁移率共轭聚合物中显示出接近无障碍的传输特征[D. Venkateshvaran et al。，Nature 515，384（2014）]。当前的塞贝克系数模型很难解释电荷传输接近无序传输的特征。我们提出一个通用的分析模型，以基于跳跃传输和渗流理论来描述有机半导体的塞贝克效应。所提出的模型可以很好地解释具有无障碍运输的聚合物的塞贝克特征，以及具有一般无序运输的有机半导体的塞贝克特征。仿真结果表明，随着能量扰动的减小，有机半导体中的塞贝克系数将发生从温度依赖性转变为温度依赖性的现象。

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