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arXiv 0807.0388cond-mat.mtrl-sci
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从头算模型研究polymer链上载流子溶剂化和大极化子的形成

Charge carrier solvation and large polaron formation on a polymer chain revealed in model ab initio computations

M. L. Mayo, Yu. N. Gartstein

摘要:

当将过量的载流子加入到半导体聚合物链中时,众所周知,载流子可以自捕获到伴随着键长调节图案的极化子状态。自定位的不同机制是当聚合物链浸入极性介质如普通溶剂中时预期发生的载流子的溶剂化。我们使用国家的最先进的从头计算结合极化连续模型,明确地证明溶剂化诱导的自洽电荷本地化到大半径一维(1D)极化子长$C_{N}H_{2}$碳链的多炔结构。在所使用的框架内,溶剂化导致更明显的电荷定位。我们相信这种极化子形成机制与极地环境中的各种一维半导体有关。

英文摘要:

When an excess charge carrier is added to a semiconducting polymer chain, it is well known that the carrier may self-trap into a polaronic state accompanied by a bond length adjustment pattern. A different mechanism of self-localization is the solvation of charge carriers expected to take place when the polymer chain is immersed in polar media such as common solvents. We use state-of-the-art ab initio computations in conjunction with the Polarizable Continuum Model to unequivocally demonstrate solvation-induced self-consistent charge localization into large-radius one-dimensional (1D) polarons on long $C_{N}H_{2}$ carbon chains with the polyynic structure. Within the framework used, the solvation results in a much more pronounced charge localization. We believe this mechanism of polaron formation to be of relevance for various 1D semiconductors in polar environments.

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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