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.
Bibliographical noteFunding Information:
This work was supported by a Grant-in-Aid (10030041-2009-12) under the Next-Generation New Technology Development Programs from the Ministry of Knowledge Economy of the Korean government, World Class University (WCU, No. R32-2008-000-10082-0) Project of the Ministry of Education, and by Business for Cooperative R&D between Industry, Academy, and Research Institute funded Korea Small and Medium Business Administration in 2010 (Grant no. 00042724-1).
- Environment sensor
- Gas sensor
- Odor sensor
ASJC Scopus subject areas
- General Materials Science
- General Physics and Astronomy