Nematic Order Imposes Molecular Weight Effect on Charge Transport in Conjugated Polymers,ACS Central Science

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Nematic Order Imposes Molecular Weight Effect on Charge Transport in Conjugated Polymers
ACS Central Science ( IF 12.7 ) Pub Date : 2018-03-09 00:00:00 , DOI: 10.1021/acscentsci.8b00011
Wenlin Zhang ₁ , Scott T Milner ₁ , Enrique D Gomez _{1,

2}

Affiliation

Nematic order, in the bulk or at interfaces, is ubiquitous for semiflexible conjugated polymers. Nevertheless, the effect of liquid crystalline order on charge transport remains unclear. Using an analytical model, we demonstrate that nematic order leads to an enhancement in charge mobilities when compared to isotropic chains. Furthermore, we predict a quadratic dependence of the charge mobility on molecular weight of the chains. Analysis of the probability of forming hairpin defects also shows how the persistence length affects charge transport in conjugated polymers. We speculate that the prevalence of nematic order in conjugated polymers explains the reported increase in charge mobilities with molecular weight.

中文翻译：

向列有序对共轭聚合物中的电荷传输产生分子量影响

对于半柔性共轭聚合物来说，本体或界面处的向列序是普遍存在的。然而，液晶有序对电荷传输的影响仍不清楚。使用分析模型，我们证明与各向同性链相比，向列有序会导致电荷迁移率增强。此外，我们预测电荷迁移率与链分子量的二次相关性。对形成发夹缺陷的概率的分析还显示了持久长度如何影响共轭聚合物中的电荷传输。我们推测共轭聚合物中向列有序的普遍存在解释了所报道的电荷迁移率随分子量的增加。

更新日期：2018-03-09

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