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Proceedings Paper

Correlation of charge transport and sensing behavior in organic semiconductor field-effect chemical sensors
Author(s): Davianne Duarte; Ananth Dodabalapur
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Paper Abstract

Pentacene based organic thin-film transistors were used to study the effects of polar analytes on charge transport behavior during vapor sensing. Four analytes were tested with various dipole moments and polarization properties. The analytes include, ethyl acetate, ethanol, cyclohexane, and styrene. While the ethanol and ethyl acetate molecules, with the larger dipole moment, have a more significant effect on the sensing behavior, a non-polar molecule such as styrene, which is polarizable, also has the ability to produce a response. The non-polar molecule, cyclohexane produced no significant response. This study helps provide a physical basis and insight into the analyte/organic semiconductor interactions for the organic transistor based sensor response.

Paper Details

Date Published: 16 September 2011
PDF: 8 pages
Proc. SPIE 8118, Organic Semiconductors in Sensors and Bioelectronics IV, 81180K (16 September 2011); doi: 10.1117/12.893401
Show Author Affiliations
Davianne Duarte, The Univ. of Texas at Austin (United States)
Ananth Dodabalapur, The Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 8118:
Organic Semiconductors in Sensors and Bioelectronics IV
Ruth Shinar; Ioannis Kymissis, Editor(s)

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