The response characteristics of odor sensor based on organic thin-film transistor for environment malodor measurements

Jin Wook Jeong, Young Wook Park, Tae Hyun Park, Jin Hwan Choi, Hyun Ju Choi, Eun Ho Song, Byeong Kwon Ju

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This paper studies the response characteristics of an odor sensor based on organic thin-film transistors (OTFTs) obtained from spin-coated poly-3-hexylthiophene (P3HT) on a thermally grown SiO2/Si wafer. The response characteristics of the odor sensor based on OTFTs are measured for odor gases generated from liquid fumes of 2-mercaptoethanol and 3-methylindole, such as are typically emitted by pig slurry in ambient air conditions. The experiments show that the response characteristics of the OTFT, when exposed to the 2-mercaptoethanol and 3-methylindole gases, result in a threshold voltage shift, a change in drain current, and a change in mobility with the gate bias.

Original languageEnglish
JournalCurrent Applied Physics
Issue number4 SUPPL.
Publication statusPublished - 2011 Jul 1



  • Environment sensor
  • Gas sensor
  • Odor sensor
  • OTFTs

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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