An isoindigo-bithiazole-based acceptor-acceptor copolymer for balanced ambipolar organic thin-film transistors

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• 作者：Ping Li ; Hanlin Wang ; Lanchao Ma ; Long Xu ; Fei Xiao ; Zhengran Yi…
• 刊名：SCIENCE CHINA Chemistry
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：59
• 期：6
• 页码：679-683
• 全文大小：1,715 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Chinese Library of Science
  Chemistry
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1870
• 卷排序：59

文摘

Balanced carrier transport is observed in acceptor-acceptor (A-A′) type polymer for ambipolar organic thin-film transistors (OTFTs). It is found that the incorporation of two electron-accepting moieties (BTz and IIG) into a polymer main chain to form A-A′ polymer PIIG-BTz could lower highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels and facilitate good molecular stacking of the polymer. Ambipolar transistor behaviour for PIIG-BTz, with the balanced hole and electron mobilities of 0.030 and 0.022 cm2 V−1 s−1 was observed in OTFT devices, respectively. The study in this work reveals that the utilization of acceptor-acceptor (A-A′) structure in polymer main chain can be a feasible strategy to develop ambipolar polymer semiconductors.Keywordsorganic thin-film transistorsacceptor-acceptor structurebalanced ambipolar transportconjugated copolymer