Synthesis, Characterization, and Field-Effect Transistor Performance of Carboxylate-Functionalized Polythiophenes with Increased Air Stability
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- 作者：Amanda R. Murphy ; Jinsong Liu ; Christine Luscombe ; David Kavulak ; Jean M. J. Fré ; chet ; R. Joseph Kline ; and Michael D. McGehee
- 刊名：Chemistry of Materials
- 出版年：2005
- 出版时间：October 4, 2005
- 年：2005
- 卷：17
- 期：20
- 页码：4892 - 4899
- 全文大小：860K
- 年卷期：v.17,no.20(October 4, 2005)
- ISSN：1520-5002
文摘
Synthetic strategies to access both regiorandom and regioregular polythiophenes containing electron-withdrawing carboxylate substituents have been developed. Although these polymers have extendedconjugation lengths, they provide better oxidative doping stability than conventional polythiophenes dueto the lowering of the HOMO energy levels by approximately 0.5 eV. These materials are highly crystallineand exhibit very small 
--stacking distances in the solid state. High charge mobilities are observed asa result of the close ordering of the polymer chains, and top-contact organic thin-film transistors (OTFTs)fabricated entirely in air had measured mobilities averaging 0.06 cm2/V·s with on/off ratios >105. Offcurrents in these devices remained low over a period of months, demonstrating the low propensity ofthese materials toward p-doping by molecular oxygen.
--stacking distances in the solid state. High charge mobilities are observed asa result of the close ordering of the polymer chains, and top-contact organic thin-film transistors (OTFTs)fabricated entirely in air had measured mobilities averaging 0.06 cm2/V·s with on/off ratios >105. Offcurrents in these devices remained low over a period of months, demonstrating the low propensity ofthese materials toward p-doping by molecular oxygen.