https://scholars.lib.ntu.edu.tw/handle/123456789/598120
標題: | Intrinsically stretchable naphthalenediimide-bithiophene conjugated statistical terpolymers using branched conjugation break spacers for field-effect transistors | 作者: | Lin, Y.-C. Matsuda, M. Sato, K.-I. Chen, C.-K. Yang, W.-C. CHU-CHEN CHUEH Higashihara, T. WEN-CHANG CHEN |
關鍵字: | Field effect transistors;Polymer films;Semiconducting films;Semiconducting polymers;Tensile strength;Alkyl groups;Atomic-force-microscopy;Based conjugated polymers;Bithiophenes;Field-effect transistor;Fracture strain;Grazing incidence X-ray diffraction;Morphological study;Property;Terpolymerisation;Conjugated polymers | 公開日期: | 2021 | 卷: | 12 | 期: | 42 | 起(迄)頁: | 6167-6178 | 來源出版物: | Polymer Chemistry | 摘要: | The development of conjugated polymers through the statistical terpolymerization of conjugation break spacers (CBSs) has received great attention because of their synergistic potential in enhancing fracture strain and tensile strength. In this study, a series of bulky and branched CBSs with ester functional groups and dimethyl (P1), methyl/propyl (P2), ethyl/butyl (P3), and dibutyl (P4) alkyl groups were incorporated into naphthalenediimide-bithiophene-based conjugated polymers through statistical terpolymerization. Morphological studies, including atomic force microscopy (AFM) and grazing incidence X-ray diffraction (GIXD) studies, were applied to pristine and stretched polymer films to decipher the structure-stretchability relationship; further, their mobility-stretchability relationship was investigated by studying their field-effect transistor (FET) characteristics. We found that polymers with bulky and branched CBSs exhibit reduced backbone rigidity, allowing polymer chains to entangle more easily than those of stiffer polymers with similar molecular weights. Therefore, the polymer film exhibits a more uniform load distribution throughout the channel layer, and the branched CBSs serve as lubricants that deter crack propagation during deformation. Consequently, P4 with symmetrically extended alkyl groups shows good ductility and mobility-stretchability properties, with orthogonal μe,?/μe,⊥ retention of approximately 20-30% with 60% strain and 30-40% after 400 stretching-releasing cycles with 60% strain. Our results indicated that statistical terpolymerization with branched CBSs is a versatile and effective methodology for controlling orientational and stacking patterns to achieve good mobility-stretchability properties in conjugated polymers. ? 2021 The Royal Society of Chemistry. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118689910&doi=10.1039%2fd1py01154e&partnerID=40&md5=a33d59089a57b3c7e95ba8867e9c74c0 https://scholars.lib.ntu.edu.tw/handle/123456789/598120 |
ISSN: | 17599954 | DOI: | 10.1039/d1py01154e |
顯示於: | 化學工程學系 |
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