Polyindolo[3,2-b]carbazoles: A New Class of p-Channel Semiconductor Polymers for Organic Thin-Film Transistors

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• 作者：Yuning Li ; Yiliang Wu ; Beng S. Ong
• 刊名：Macromolecules
• 出版年：2006
• 出版时间：September 19, 2006
• 年：2006
• 卷：39
• 期：19
• 页码：6521 - 6527
• 全文大小：176K
• 年卷期：v.39,no.19(September 19, 2006)
• ISSN：1520-5835

文摘

The synthesis and field-effect transistor (FET) properties of a novel class of indolocarbazole-based conjugated polymers, poly(indolo[3,2-b]carbazole)s, are described. Dehalogenative coupling polymerizationof dichloroindolo[3,2-b]carbazoles with Zn/NiCl₂/PPh₃/2.2'-dipyridil gave the corresponding poly(indolo[3,2-b]carbazole)s, while oxidative coupling polymerization of indolo[3,2-b]carbazoles with FeCl₃ proceeded regioselectively, affording poly(indolo[3,2-b]carbazole-2,8-diyl)s. Crystallization and optical properties of these polymerswere different, depending on the regiochemistry of backbone linkages and peripheral substitutions. Thin filmtransistor devices using these polymer semiconductors exhibited p-channel FET behavior, dictated predominantlyby nature of substitution and backbone linkages (2,8- or 3,9-linkage). Solution-processed polyindolo[3,2-b]carbazolethin-film semiconductors obtained from FeCl₃ polymerization generally provided better FET performance.