n-Type Rigid Semiconducting Polymers Bearing Oligo(Ethylene Glycol) Side Chains for High-Performance Organic Electrochemical Transistors

Xingxing Chen, Adam Marks, Bryan D. Paulsen, Ruiheng Wu, Reem B. Rashid, Hu Chen, Maryam Alsufyani, Jonathan Rivnay, Iain McCulloch

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

N-type conjugated polymers as the semiconducting component of organic electrochemical transistors (OECTs) are still undeveloped with respect to their p-type counterparts. Herein, we report two rigid n-type conjugated polymers bearing oligo(ethylene glycol) (OEG) side chains, PgNaN and PgNgN, which demonstrated an essentially torsion-free π-conjugated backbone. The planarity and electron-deficient rigid structures enable the resulting polymers to achieve high electron mobility in an OECT device of up to the 10−3 cm2 V−1 s−1 range, with a deep-lying LUMO energy level lower than −4.0 eV. Prominently, the polymers exhibited a high device performance with a maximum dimensionally normalized transconductance of 0.212 S cm−1 and the product of charge-carrier mobility μ and volumetric capacitance C* of 0.662±0.113 F cm−1 V−1 s−1, which are among the highest in n-type conjugated polymers reported to date. Moreover, the polymers are synthesized via a metal-free aldol-condensation polymerization, which is beneficial to their application in bioelectronics.

Original languageEnglish (US)
Pages (from-to)9368-9373
Number of pages6
JournalAngewandte Chemie - International Edition
Volume60
Issue number17
DOIs
StatePublished - Apr 19 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • General Chemistry

Keywords

  • metal-free aldol condensation
  • n-type conjugated polymers
  • oligo(ethylene glycol) side chains
  • organic electrochemical transistors
  • rigid semiconducting polymers

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