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16 September 2011 Correlation of charge transport and sensing behavior in organic semiconductor field-effect chemical sensors
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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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Davianne Duarte and Ananth Dodabalapur "Correlation of charge transport and sensing behavior in organic semiconductor field-effect chemical sensors", Proc. SPIE 8118, Organic Semiconductors in Sensors and Bioelectronics IV, 81180K (16 September 2011); https://doi.org/10.1117/12.893401
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