Organic Semiconductor Transistor Sensors

Berggren, M., Forchheimer, R., Bobacka, J., Svensson, P.O., Nilsson, D., Larsson, O., Ivaska, A., 2008. PEDOT PSS-Based electrochemical transistors for ion-to-electron transduction and sensor signal amplification. In Bernards, D., MaUiaras, G., Owens, R. (Eds.), Organic Semiconductors in Sensor Applications. Springer Berhn Heidelberg. 

ORGANIC SEMICONDUCTOR THIN-FILM TRANSISTOR SENSORS... 

As a class of n-type organic semiconductors, PBI derivatives have received considerable attention for a variety of applications [312, 313], for example, for organic or polymer light-emitting diodes (OLEDs and PLEDs) [314, 315], thin-film organic field-effect transistors (OFETs) [316, 317], solar cells [318, 319], and liquid crystals [320]. They are also interesting candidates for single-molecule device applications, such as sensors [321], molecular wires [322], or transistors [141]. 

Abstract Thin film conductivity sensors that use metal phthalocyanine semiconductors offer properties distinct from those of organic thin film transistor sensors. 

Organic semiconductors (OS), such as pentacene, lead phthalocyanine etc. have attracted considerable attention as the components of barrier heterojunctions with other organic or inorganic semiconductors (IS) for transistor, sensor or photovoltaic application. Therefore, dependence of the electronic and recombination properties of the heterostructure interface on the technological conditions of the interface formation is of great importance [1-6]. 

An important area where technology and heterocyclic chemistry combine is that of electroactive organic materials. The applications of these materials, which extend beyond simple replacements for metals, include use as conductors, superconductors, semiconductors, batteries, transistors, sensors, light emitting diodes (LEDs), and related electrochromic applications. This area is of great commercial importance. 

Huang J, Miragliotta J, Becknell A, Katz HE (2007) Hydroxy-terminated organic semiconductor-based field-effect transistors for phosphonate vapor detection. J Am Chem Soc 129 9366-9376 Janata J, Josowicz M (1998) Chemical modulation of work function as a transduction mechanism for chemiceil sensors. Acc Chem Res 31 241-248... 

There has recently been considerable interest in the detection and identification of air-borne volatile compounds in such diverse areas as quality control of perfume to detection of toxic gases. Miniaturization, the potential low cost of sensors and the variety of applications promise an enormous market (29, 30), Chemical sensors (29) for volatile compounds operate on varied principles and can be classified according to the method of functioning into basic groups such as electrical (field-effect transistors, metal oxide semiconductors and organic semiconductors), optical (spectrophotometric, luminescence, optothermal) and sensors that are sensitive to a change of mass (piezoelectric and acoustosurface). 

Solid-state potentiometric sensors that are based on the chemical modulation of the work function of organic semiconductors were reviewed. These include the chemically sensitive field-effect transistor in which the conventional gate of... 

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