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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Poly-(3-hexylthiophene) bottlebrush copolymers with tailored side-chain lengths and high charge carrier mobilities
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Poly-(3-hexylthiophene) bottlebrush copolymers with tailored side-chain lengths and high charge carrier mobilities

机译：具有定制侧链长度和高电荷载流子迁移率的聚（3-己基噻吩）洗瓶刷共聚物

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摘要

A series of well-defined poly(3-hexylthiophene) (P3HT) grafted bottled brushes PS-g-P3HT with different P3HT chain lengths were synthesized by a grafting-to approach using nitroxide mediated controlled radical polymerization. The influence of the side-chain length on the optical, thermal and electronic properties of these polymers is systematically studied and compared with the corresponding linear P3HTs. It can be shown that the optical, structural and electronic properties of the brushes depend heavily on the side chain lengths. The results of DSC, UV-Vis and AFM measurements reveal two important things. The brush polymers with low molecular weight P3HT side-chains do not crystallize and therefore exhibit very poor electronic properties. With an increase of the side-chain length, highly crystalline materials are obtained and a brush with a high molecular weight (144 kg mol(-1)) carrying long P3HT side chains (17000 g mol(-1)) is necessary to obtain crystalline lamellar structures and the best charge transport properties. For the first time P3HT brush polymers are reported that can match the excellent electronic properties of their linear counterparts in the range of 10(-2) cm(2) V-1 s(-1). Additionally, the brush polymers exhibit better thin film stability at elevated temperatures compared to linear P3HTs.
机译：采用一氧化氮介导的受控自由基聚合反应，通过接枝合成了一系列定义明确的聚（3-己基噻吩）（P3HT）接枝瓶装刷子PS-g-P3HT。系统地研究了侧链长度对这些聚合物的光学，热和电子性质的影响，并将其与相应的线性P3HTs进行了比较。可以看出，电刷的光学，结构和电子性能在很大程度上取决于侧链的长度。 DSC，UV-Vis和AFM测量的结果揭示了两个重要的方面。具有低分子量P3HT侧链的刷子聚合物不会结晶，因此显示出非常差的电子性能。随着侧链长度的增加，获得了高度结晶的材料，并且需要带有长P3HT侧链（17000 g mol（-1））的高分子量（144 kg mol（-1））的刷子晶体层状结构和最佳的电荷传输性能。首次报道可在10（-2）cm（2）V-1 s（-1）范围内与线性对应物的出色电子性能相匹配的P3HT刷聚合物。此外，与线性P3HT相比，刷子聚合物在高温下表现出更好的薄膜稳定性。

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