Fused Bithiophene Imide Dimer-Based n-Type Polymers for High-Performance Organic Electrochemical Transistors

Kui Feng, Wentao Shan, Suxiang Ma, Ziang Wu, Jianhua Chen, Han Guo, Bin Liu, Junwei Wang, Bangbang Li, Han Young Woo, Simone Fabiano, Wei Huang, Xugang Guo

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


The development of n-type organic electrochemical transistors (OECTs) lags far behind their p-type counterparts. In order to address this dilemma, we report here two new fused bithiophene imide dimer (f-BTI2)-based n-type polymers with a branched methyl end-capped glycol side chain, which exhibit good solubility, low-lying LUMO energy levels, favorable polymer chain orientation, and efficient ion transport property, thus yielding a remarkable OECT electron mobility (μe) of up to ≈10−2 cm2 V−1 s−1 and volumetric capacitance (C*) as high as 443 F cm−3, simultaneously. As a result, the f-BTI2TEG-FT-based OECTs deliver a record-high maximum geometry-normalized transconductance of 4.60 S cm−1 and a maximum μC* product of 15.2 F cm−1 V−1 s−1. The μC* figure of merit is more than one order of magnitude higher than that of the state-of-the-art n-type OECTs. The emergence of f-BTI2TEG-FT brings a new paradigm for developing high-performance n-type polymers for low-power OECT applications.

Original languageEnglish
Pages (from-to)24198-24205
Number of pages8
JournalAngewandte Chemie - International Edition
Issue number45
Publication statusPublished - 2021 Nov 2


  • electron mobility
  • fused bithiophene imide dimer
  • n-type polymer semiconductors
  • organic electrochemical transistors
  • organic electronics

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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