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  • Title: Interface and gate bias dependence responses of sensing organic thin-film transistors.
    Author: Tanese MC, Fine D, Dodabalapur A, Torsi L.
    Journal: Biosens Bioelectron; 2005 Nov 15; 21(5):782-8. PubMed ID: 16242618.
    Abstract:
    The effects of the exposure of organic thin-film transistors, comprising different organic semiconductors and gate dielectrics, to 1-pentanol are investigated. The transistor sensors exhibited an increase or a decrease of the transient source-drain current in the presence of the analyte, most likely as a result of a trapping or of a doping process of the organic active layer. The occurrence of these two effects, that can also coexist, depend on the gate-dielectric/organic semiconductor interface and on the applied gate field. Evidence of a systematic and sizable response enhancement for an OTFT sensor operated in the enhanced mode is also presented.
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