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Rational Design of High-Mobility Semicrystalline Conjugated Polymers with Tunable Charge Polarity: Beyond Benzobisthiadiazole-Based Polymers

机译：具有可调电荷极性的高迁移率半结晶共轭聚合物的合理设计：超越基于苯并噻吩并二唑的聚合物

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摘要

High-mobility semiconducting polymers composed of arylene vinylene and dithiophene-thiadiazolobenzotriazole (SN) units are developed by three powerful design strategies, namely, backbone engineering, heteroatom substitution, and side-chain engineering. First, starting from the quaterthiophene-SN copolymer, a vinylene spacer is inserted into the quaterthiophene unit for constructing highly-planar backbones. Second, heteroatoms (O and N atoms) are incorporated into the thienylene vinylene moieties to tune the electronic properties and intermolecular interactions. Third, the alkyl side chains are optimized to tune the solubility and self-assembly properties. As a consequence, a remarkable thin film transistor performance is obtained. The very high hole mobility of 3.22 cm(2) V-1 s(-1) is achieved for the p-type polymer, PSNVT-DTC8, which is the highest value ever reported for the polymers based on the benzobisthiadiazole and its analogs. Moreover, heteroatom substitution efficiently varies the charge polarity of the polymers as in the case of the N atom substituted PSNVTz-DTC16 displaying n-type dominant ambipolar properties with the electron mobility of 0.16 cm(2) V-1 s(-1). Further studies using grazing-incidence wide-angle X-ray scattering and atomic force microscopy have revealed the high crystallinities of the polymer thin films with strong pi-pi interactions and suitable polymer packing orientations.
机译：由亚芳基亚乙烯基和二噻吩-噻二唑并苯并三唑（SN）单元组成的高迁移率半导体聚合物是通过三种强大的设计策略开发的，即骨架工程，杂原子取代和侧链工程。首先，从四噻吩-SN共聚物开始，将亚乙烯基间隔基插入到四噻吩单元中以构建高度平面的骨架。第二，将杂原子（O和N原子）结合到亚硫撑亚乙烯基部分中，以调节电子性能和分子间相互作用。第三，优化烷基侧链以调节溶解度和自组装性能。结果，获得了显着的薄膜晶体管性能。对于p型聚合物PSNVT-DTC8，实现了3.22 cm（2）V-1 s（-1）的非常高的空穴迁移率，这是有报道的基于苯并双噻二唑及其类似物的聚合物的最高值。此外，杂原子取代有效地改变了聚合物的电荷极性，就像在N原子取代的PSNVTz-DTC16表现出电子迁移率为0.16 cm（2）V-1 s（-1）的n型主要双极性性质一样。使用掠入射广角X射线散射和原子力显微镜的进一步研究表明，具有强pi-pi相互作用和合适的聚合物堆积方向的聚合物薄膜具有很高的结晶度。

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  • 来源
    《Advanced Functional Materials》 |2017年第2期|1604608.1-1604608.15|共15页
  • 作者

    Wang Yang; Hasegawa Tsukasa; Matsumoto Hidetoshi; Mori Takehiko; Michinobu Tsuyoshi;

  • 作者单位

    Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528552, Japan;

    Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528552, Japan;

    Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528552, Japan;

    Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528552, Japan;

    Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528552, Japan;

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