Lactone-fused electron-deficient building blocks for n-type polymer field-effect transistors: synthesis, properties, and impact of alkyl substitution positions
Lactone-fused electron-deficient building blocks for n-type polymer field-effect transistors: synthesis, properties, and impact of alkyl substitution positions
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DOI：
10.1039/c6py00143b
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发表时间：
2016-03
影响因子：
4.6
通讯作者：
Xiao-Ye Wang;Mengying Zhang;Fang‐Dong Zhuang;Jie‐Yu Wang;J. Pei
中科院分区：
文献类型：
--
作者：
Xiao-Ye Wang;Mengying Zhang;Fang‐Dong Zhuang;Jie‐Yu Wang;J. Pei
新型缺电子结构单元（受体）的开发在 n 型场效应晶体管的共轭聚合物中发挥着至关重要的作用。在共轭主链上掺入内酰胺部分一直是受体单元最重要的设计概念之一，而内酯稠合结构的潜力在聚合物半导体中很少被探索。佩赫曼染料是一种基于内酯的电子接受单元。理论计算证明这些内酯基受体比内酰胺受体具有更高的电子亲和力。在这项工作中，基于 6,6-内双内酯的 Pechmann 染料首次成功融入共轭聚合物中，提供高达 0.51 cm2 V−1 s−1 的高电子迁移率。这些结果证明了内酯稠合结构作为共轭聚合物的缺电子结构单元的巨大潜力。此外，发现不同的烷基链取代位置显着影响能级和分子间相互作用，从而影响器件性能，表明侧链工程在聚合物半导体中的重要作用。
The development of novel electron-deficient building blocks (acceptors) plays a vital role in conjugated polymers for n-type field-effect transistors. Incorporation of lactam moieties on conjugated backbones has been one of the most important design concepts of acceptor units, whereas the potential of lactone-fused structures has seldom been explored in polymer semiconductors. Pechmann dyes are a kind of lactone-based electron-accepting units. Theoretical calculations prove that these lactone-based acceptors possess higher electron affinity than their lactam counterparts. In this work, 6,6-endo-dilactone-based Pechmann dyes were successfully incorporated into conjugated polymers for the first time, providing high electron mobilities of up to 0.51 cm2 V−1 s−1. These results demonstrated the high potential of lactone-fused structures as electron-deficient building blocks for conjugated polymers. Furthermore, different alkyl chain substitution positions were found to significantly affect the energy levels and intermolecular interactions, and consequently the device performance, indicating the important role of side chain engineering in polymer semiconductors.