Fluorinated Alcohol-Processed N-Type Organic Electrochemical Transistor with High Performance and Enhanced Stability

Genming Zhu, Junxin Chen, Jiayao Duan, Hailiang Liao, Xiuyuan Zhu, Zhengke Li, Iain McCulloch, Wan Yue

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Tuning the film morphology and aggregated structure is a vital means to improve the performance of the mixed ionic-electronic conductors in organic electrochemical transistors (OECTs). Herein, three fluorinated alcohols (FAs), including 2,2,2-trifluoroethanol (TFE), 1,1,1,3,3,3-hexafluoroisopropanol (HFIP), and perfluoro-tert-butanol (PFTB), were employed as the alternative solvents for engineering the n-type small-molecule active layer gNR. Remarkedly, an impressive μC∗ of 5.12 F V-1 cm-1 s-1 and a normalized transconductance of 1.216 S cm-1 are achieved from the HFIP-fabricated gNR OECTs, which is three times higher than that of chloroform. The operational stability has been significantly enhanced by the FA-fabricated devices. Such enhancements can be ascribed to the aggregation-induced structural ordering by FAs during spin coating, which optimizes the microstructure of the films for a better mixed ion and electron transport. These results prove the huge research potential of FAs to improve OECT materials' processability, device performance, and stability, therefore promoting practical bio-applications.

Original languageEnglish (US)
Pages (from-to)43586-43596
Number of pages11
JournalACS Applied Materials and Interfaces
Volume14
Issue number38
DOIs
StatePublished - Sep 28 2022
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science

Keywords

  • aggregation
  • conductivity and stability
  • fluorinated alcohols
  • n-type small-molecule mixed conductor
  • organic electrochemical transistors
  • solvent engineering

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