High-Performance n-Type Polymeric Mixed Ionic-Electronic Conductors: The Impacts of Halogen Functionalization

Wanli Yang, Kui Feng, Suxiang Ma, Bin Liu, Yimei Wang, Riqing Ding, Sang Young Jeong, Han Young Woo, Paddy Kwok Leung Chan, Xugang Guo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Developing high-performance n-type polymer mixed ionic-electronic conductors (PMIECs) is a grand challenge, which largely determines their applications in vaious organic electronic devices, such as organic electrochemical transistors (OECTs) and organic thermoelectrics (OTEs). Herein, two halogen-functionalized PMIECs f-BTI2g-TVTF and f-BTI2g-TVTCl built from fused bithiophene imide dimer (f-BTI2) as the acceptor unit and halogenated thienylene–vinylene–thienylene (TVT) as the donor co-unit are reported. Compared to the control polymer f-BTI2g-TVT, the fluorinated f-BTI2g-TVTF shows lower-positioned lowest unoccupied molecular orbital (LUMO), improved charge transport property, and greater ion uptake capacity. Consequently, f-BTI2g-TVTF delivers a state-of-the-art µC* of 90.2 F cm−1 V−1 s−1 with a remarkable electron mobility of 0.41 cm2 V−1 s−1 in OECTs and an excellent power factor of 64.2 µW m−1 K−2 in OTEs. An OECT-based inverter amplifier is further demonstrated with voltage gain up to 148 V V−1, which is among the highest values for OECT inverters. Such results shed light on the impacts of halogen atoms on developing high-performing n-type PMIECs.

Original languageEnglish
Article number2305416
JournalAdvanced Materials
Volume36
Issue number4
DOIs
Publication statusPublished - 2024 Jan 25

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • halogen functionalization
  • n-type polymer semiconductors
  • organic electrochemical transistors
  • organic thermoelectrics
  • polymeric mixed ionic-electronic conductors

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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