Gate-tunable gas sensing behaviors in air-stable ambipolar organic thin-film transistors

Hyunah Kwon, Hocheon Yoo, Masahiro Nakano, Kazuo Takimiya, Jae Joon Kim, Jong Kyu Kim

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Chemiresistive gas sensors, which exploit their electrical resistance in response to changes in nearby gas environments, usually achieve selective gas detection using multi-element sensor arrays. As large numbers of sensors are required, they often suffer from complex and high-cost fabrication. Here, we demonstrate an ambipolar organic thin-film transistor as a potential multi-gas sensing device utilizing gate-tunable gas sensing behaviors. Combining behaviors of both electron and hole carriers in a single device, the proposed device showed dynamic changes depending on gate biases and properties of target gases. As a result, the gas response as a function of gate biases exhibits a unique pattern towards a specific gas as well as its concentrations, which is very different from conventional unipolar organic thin-film transistors. In addition, our device showed an excellent air-stable characteristic compared to typical ambipolar transistors, providing great potential for practical use in the future.

Original languageEnglish
Pages (from-to)1910-1916
Number of pages7
JournalRSC Advances
Issue number4
Publication statusPublished - 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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