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首页> 外文期刊>Physica status solidi, B. Basic research >Charge carrier diffusion in energy landscape created by static charges: Poole-Frenkel model revised
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Charge carrier diffusion in energy landscape created by static charges: Poole-Frenkel model revised

机译：静电荷在能量景观中产生的载流子扩散：修订了Poole-Frenkel模型

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Effect of static charges on charge carrier transport in disordered organic materials is considered. We show that the mobility dependence on temperature and concentration of charged traps differs drastically from the prediction of the model of isolated charged trap (Poole-Frenkel model), yet, by accident, the mobility field dependence remains the same with the logarithm of the mobility being proportional to the square root of the electric field. The ultimate reason for the difference is a long range nature of the Coulomb interaction of a carrier with charged traps. This interaction produces huge fluctuations of carrier energy in the medium overcoming carrier interaction with the isolated static charge. A possibility to observe this quasi-Poole-Frenkel transport regime in experiments is discussed. We argue that the model of isolated charged trap may be applied only to the case of charge transport in extremely thin transport layers. [References: 22]
机译：考虑了静电荷对无序有机材料中载流子迁移的影响。我们表明，迁移率对带电陷阱的温度和浓度的依赖性与孤立带电陷阱模型（Poole-Frenkel模型）的预测有很大不同，但偶然地，迁移率场的依赖性与迁移率的对数相同与电场的平方根成正比。造成这种差异的最终原因是载流子与带电陷阱的库仑相互作用的远距离特性。这种相互作用会在介质中产生巨大的载流子能量波动，从而克服载流子与孤立的静电荷之间的相互作用。讨论了在实验中观察这种准Poole-Frenkel输运方式的可能性。我们认为隔离电荷陷阱的模型可能仅适用于极薄传输层中电荷传输的情况。 [参考：22]

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