A simple and efficient strategy to modulate the self-assembly and solid-state morphology of conjugated polymers has been developed by incorporating various amounts of amide-containing alkyl side chains to high charge carrier mobility conjugated polymers based on diketopyrrolopyrrole (DPP). Synthetically easily accessible and tunable, the incorporation of amide-containing side chains is a direct strategy to promote intermolecular hydrogen bonding between polymer chains and tune the solid-state morphology. Incorporation of 5–30 mol % of amides in the conjugated polymers was performed without a drastic decrease of solubility. The incorporation of hydrogen-bonding moieties allowed for an improvement of the charge carrier mobility in organic field-effect transistors (OFET) devices, which achieved a maximum value of 2.46 cm²/(V s) at 5 mol % of amides. Morphological investigation showed that the intermolecular hydrogen bonds formed between adjacent amide moieties directly affected the lamellar packing of the polymer and aggregation, without affecting the π-conjugation. Therefore, controlled self-assembly of conjugated polymers through hydrogen-bonding side chains is a promising strategy toward more efficient semiconducting polymers for thin film transistors and other organic electronics.

中文翻译：

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共轭聚合物中含酰胺的烷基链：对自组装和电子性能的影响

通过将各种数量的含酰胺的烷基侧链掺入到基于二酮吡咯并吡咯（DPP）的高电荷载流子迁移率的共轭聚合物中，已开发出一种简单有效的策略来调节共轭聚合物的自组装和固态形态。合成上易于访问和可调，并入含酰胺的侧链是促进聚合物链之间分子间氢键键合并调整固态形态的直接策略。在共轭聚合物中掺入5–30 mol％的酰胺时，溶解度没有显着降低。氢键部分的引入允许改进有机场效应晶体管（OFET）器件中的电荷载流子迁移率，该器件的最大值达到2.46 cm ²/（V s）为5摩尔％的酰胺。形态学研究表明，相邻酰胺部分之​​间形成的分子间氢键直接影响聚合物的层状堆积和聚集，而不影响π-共轭。因此，通过氢键合侧链控制共轭聚合物的自组装是朝着更高效的半导体聚合物用于薄膜晶体管和其他有机电子器件的有希望的策略。