Side-Chain-Induced Rigid Backbone Organization of Polymer Semiconductors through Semifluoroalkyl Side Chains

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• 作者：Boseok Kang ; Ran Kim ; Seon Baek Lee ; Soon-Ki Kwon ; Yun-Hi Kim ; Kilwon Cho
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：March 23, 2016
• 年：2016
• 卷：138
• 期：11
• 页码：3679-3686
• 全文大小：652K
• ISSN：1520-5126

文摘

While high-mobility p-type conjugated polymers have been widely reported, high-mobility n-type conjugated polymers are still rare. In the present work, we designed semifluorinated alkyl side chains and introduced them into naphthalene diimide-based polymers (PNDIF-T2 and PNDIF-TVT). We found that the strong self-organization of these side chains induced a high degree of order in the attached polymer backbones by forming a superstructure composed of “backbone crystals” and “side-chain crystals”. This phenomenon was shown to greatly enhance the ordering along the backbone direction, and the resulting polymers thus exhibited unipolar n-channel transport in field-effect transistors with remarkably high electron mobility values of up to 6.50 cm² V^–1 s^–1 and with a high on–off current ratio of 10⁵.