arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.00136cond-mat.mtrl-sciphysics.chem-ph
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给体-受体共聚物有序纳米结构中的准粒子和能带输运

Quasiparticles and Band Transport in Organized Nanostructures of Donor-Acceptor Copolymers

Guorong Weng, Vojtěch Vlček

摘要:

有机半导体器件的性能与自组装分子和聚合物的高度有序纳米结构有关。本文采用多体微扰理论研究了体相聚合物的激发态。我们发现,在聚合物支架受体引入了一个,迄今未被识别的,导电杂质带。供体单元被共轭带包围,这些共轭带仅被受体的存在轻度扰动。沿着聚合物轴,共聚物链之间的相互作用阻碍了有效的能带传输,然而,这是强烈增强跨单个链。我们发现空穴在$π-π$堆叠中传输最有效,而杂质带中的电子遵循边到边的方向。该共聚物表现出的区域具有反转的传输极性,其中电子和空穴被有效地传输在相互正交的方向。

英文摘要:

The performance of organic semiconductor devices is linked to highly-ordered nanostructures of self-assembled molecules and polymers. We employ many-body perturbation theory and study the excited states in bulk compolymers. We discover that acceptors in the polymer scaffold introduce a, hitherto unrecognized, conduction impurity band. The donor units are surrounded by conjugated bands which are only mildly perturbed by the presence of acceptors. Along the polymer axis, mutual interactions among copolymer strands hinder efficient band transport, which is, however, strongly enhanced across individual chains. We find that holes are most effectively transported in the $π-π$ stacking while electrons in the impurity band follow the edge-to-edge directions. The copolymers exhibit regions with inverted transport polarity, in which electrons and holes are efficiently transported in mutually orthogonal directions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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