Porous Semiconducting Polymers Enable High-Performance Electrochemical Transistors

Lizhen Huang, Zhi Wang, Jianhua Chen, Binghao Wang, Yao Chen, Wei Huang, Lifeng Chi, Tobin J. Marks, Antonio Facchetti

Research output: Contribution to journalArticlepeer-review

Abstract

Organic polymer electrochemical transistors (OECTs) are of great interest for flexible electronics and bioelectronics applications owing to their high transconductance and low operating voltage. However, efficient OECT operation must delicately balance the seemingly incompatible materials optimizations of redox chemistry, active layer electronic transport, and ion penetration/transport. The latter characteristics are particularly challenging since most high-mobility semiconducting polymers are hydrophobic, which hinders efficient ion penetration, hence limiting OECT performance. Here, the properties and OECT response of a series of dense and porous semiconducting polymer films are compared, the latter fabricated via a facile breath figure approach. This methodology enables fast ion doping, high transconductance (up to 364 S cm−1), and a low subthreshold swing for the hydrophobic polymers DPPDTT and P3HT, rivalling or exceeding the metrics of the relatively hydrophilic polymer, Pg2T-T. Furthermore, the porous morphology also enhances the transconductance of hydrophilic polymers, offering a general strategy for fabricating high-performance electrochemical transistors.

Original languageEnglish
Article number2007041
JournalAdvanced Materials
Volume33
Issue number14
DOIs
Publication statusPublished - Apr 8 2021

Keywords

  • breath figure fabrication
  • organic electrochemical transistors
  • porous films
  • semiconducting polymers

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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