Importance of C2 Symmetry for the Device Performance of a Newly Synthesized Family of Fused-Ring Thiophenes

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• 作者：Mingqian He ; Jianfeng Li ; Adama Tandia ; Michael Sorensen ; Feixia Zhang ; Hon Hang Fong ; Vladimir A. Pozdin ; Detlef-M. Smilgies ; George G. Malliaras
• 刊名：Chemistry of Materials
• 出版年：2010
• 出版时间：May 11, 2010
• 年：2010
• 卷：22
• 期：9
• 页码：2770-2779
• 全文大小：1038K
• 年卷期：v.22,no.9(May 11, 2010)
• ISSN：1520-5002

文摘

We investigated the relationship between molecular structure and field-effect hole mobility in a family of fused-ring polythiophene copolymers that we designed recently. The results suggest that a repeat unit that possesses a C₂-axis perpendicular to the conjugation plane is important to achieve a high mobility. Our finding is supported by a review of literature data. Many polymer semiconductors showing a hole or electron mobility of >0.1 cm²/(V s) feature a repeat unit with C₂ symmetry; however, exceptions have been found from some push−pull polymer structures.