The development of new solution-processable organic π systems is significant for the development of organic electronics, especially those with high hole/electron mobilities. Conjugated bilaterally pyrene-fused perylene tetracarboxdiimide (DPPDI) is a new class of material with high mobility and large on/off ratio. In this work, in several pyrene-fused PDIs, the impact of the alkyl chain on the performance has been systematically investigated, including the alkyl type (linear/branch), the alkyl chain length, and the position of the branching point. For the first time, the “antenna effect” has been observed in small molecules. Interestingly, the synthesized DPPDIs can form microfibers, indicating their tendency to form well-organized self-assembled structures. Moreover, a pyrene-fused PDI bearing a 5-decylpentadecyl N-alkyl chain group demonstrates an improved mobility of up to 1.38 cm² V⁻¹ s⁻¹, which is the highest hole mobility value among pyrene derivative-based FETs through solution processing.

中文翻译：

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pyr稠合per二酰亚胺的烷基链工程：对运输能力和超细纤维自组装的影响

新的可溶液处理的有机π系统的开发对于有机电子学尤其是具有高空穴/电子迁移率的有机电子学的开发具有重要意义。共轭双向pyr稠合的per四碳二亚胺（DPPDI）是一类新型的材料，具有高迁移率和大的开/关比。在这项工作中，在几个pyr稠合的PDI中，已经系统地研究了烷基链对性能的影响，包括烷基类型（直链/支链），烷基链长和支化点的位置。首次在小分子中观察到“天线效应”。有趣的是，合成的DPPDI可以形成微纤维，表明它们倾向于形成组织良好的自组装结构。而且，带有5-癸基十五烷基N的a稠合的PDI-烷基链基团显示出高达1.38 cm ² V ^-1 s ^-1的改善的迁移率，这是通过溶液处理在pyr衍生物基FET中最高的空穴迁移率值。