Amphiphilic Poly(3-hexylthiophene)-Based Semiconducting Copolymers for Printing of Polyelectrolyte-Gated Organic Field-Effect Transistors

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• 作者：Ari Laiho ; Ha Tran Nguyen ; Hiam Sinno ; Isak Engquist ; Magnus Berggren ; Philippe Dubois ; Olivier Coulembier ; Xavier Crispin
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：June 11, 2013
• 年：2013
• 卷：46
• 期：11
• 页码：4548-4557
• 全文大小：535K
• 年卷期：v.46,no.11(June 11, 2013)
• ISSN：1520-5835

文摘

Polyelectrolytes are promising electronically insulating layers for low-voltage organic field effect transistors. However, the polyelectrolyte鈥搒emiconductor interface is difficult to manufacture due to challenges in wettability. We introduce an amphiphilic semiconducting copolymer which, when spread as a thin film, can change its surface from hydrophobic to hydrophilic upon exposure to water. This peculiar wettability is exploited in the fabrication of polyelectrolyte-gated field-effect transistors operating below 0.5 V. The prepared amphiphilic semiconducting copolymer is based on a hydrophobic regioregular poly(3-hexylthiophene) (P3HT) covalently linked to a hydrophilic poly(sulfonated)-based random block. Such a copolymer is obtained in a three-step strategy combining Grignard metathesis (GRIM), atom transfer radical polymerization (ATRP) processes, and a postmodification method. The structure of the diblock copolymer was characterized using FT-IR, ¹H NMR spectroscopy, and gel permeation chromatography (GPC).