Elastomer–Polymer Semiconductor Blends for High-Performance Stretchable Charge Transport Networks

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• 作者：Dalsu Choi ; Hyungchul Kim ; Nils Persson ; Ping-Hsun Chu ; Mincheol Chang ; Ji-Hwan Kang ; Samuel Graham ; Elsa Reichmanis
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：February 23, 2016
• 年：2016
• 卷：28
• 期：4
• 页码：1196-1204
• 全文大小：713K
• ISSN：1520-5002

文摘

An inverse relationship between mechanical ductility and mobility/molecular ordering in conjugated polymer systems was determined definitively through systematic interrogation of poly(3-hexylthiophene) (P3HT) films with varied degrees of molecular ordering and associated charge transport performance. The dilemma, whereby molecular ordering required for efficient charge transport conclusively undermines the applicability of these materials for stretchable, flexible device applications, was resolved using a polymer blend approach. Specifically, the molecular interactions between dissimilar polymer materials advantageously induced semiconducting polymer ordering into efficient π–π stacked fibrillar networks. Changes in the molecular environment surrounding the conjugated polymer during the elastomer curing process further facilitated development of high mobility networked semiconductor pathways. A processed P3HT: poly(dimethylsiloxane) (PDMS) composite afforded a semiconducting film that exhibits superior ductility and notable mobility versus the single-component polymer semiconductor counterpart.