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

作者：Li, Ping; Wang, Hanlin; Ma, Lanchao; Xu, Long; Xiao, Fei; Yi, Zhengran^*; Liu, Yunqi^*; Wang, Shuai^*

来源：Science China Chemistry, 2016, 59(6): 679-683.

DOI：10.1007/s11426-015-0511-9

• organic thin-film transistors
• acceptor-acceptor structure
• balanced ambipolar transport
• conjugated copolymer

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 cm(2) 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.

• 出版日期2016-6
• 单位中国科学院; 数字制造装备与技术国家重点实验室; 华中科技大学