Efficient n-Type Small-Molecule Mixed Ion-Electron Conductors and Application in Hydrogen Peroxide Sensors

Hailiang Liao, Junxin Chen, Liuyuan Lan, Yaping Yu, Genming Zhu, Jiayao Duan, Xiuyuan Zhu, Haojie Dai, Mingfei Xiao, Zhengke Li, Wan Yue, Iain McCulloch

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Small-molecule semiconductors used as the channel of organic electrochemical transistors (OECTs) have been rarely reported despite their inherent advantages of well-defined molecular weight, convenient scale-up synthesis, and good performance reproducibility. Herein, three small molecules based on perylene diimides are readily prepared for n-type OECTs. The final molecules show preferred energy levels, tunable backbone conformation, and high film crystallinity, rendering them good n-type dopability, favorable volumetric capacities, and substantial electron mobilities. Consequently, the OECTs afford a record-low threshold voltage of 0.05 V and a normalized peak transconductance of 4.52 × 10-2S cm-1, as well as impressive long-term cycling stability. Significantly, the OECTs utilized for hydrogen peroxide sensing are further demonstrated with a detection limit of 0.75 μM. This work opens the possibility of developing nonfullerene small molecules as superior n-type OECT materials and provides important insights for designing high-performance small-molecule mixed ion-electron conductors for OECTs and (bio)sensors.
Original languageEnglish (US)
Pages (from-to)16477-16486
Number of pages10
JournalACS Applied Materials and Interfaces
Issue number14
StatePublished - Apr 13 2022
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-21

ASJC Scopus subject areas

  • General Materials Science


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