Gas-Sensing Characteristics of Organic Thin-Film Transistors

As indicated before, the semiconductor, which interacts with analyte, is the main element in thin-fihn transistor-based gas sensors. Research has shown that for fabrication of these devices both organic and inorganic semiconductors can be used. 

2 Gas-Sensing Characteristics of Organic Thin-Film Transistors 

Typical operating characteristics of OTFTs are shown in Fig. 20.2. These results were obtained by Zhu et al. (2002), who studied pentacene-based TFT as a humidity sensor. 

Phthalocyanines(metallophthalocyanines) Oxygen, iodine, bromine (Laurs and Hedand 1987) nitrogen dioxide (Hu et al. 2000 Bouvet 2006) ozone (Bouvet et aL 2(X)la, b Bouvet 2006) alcohols, ketones, thiols, nitriles, esters, ring compounds (Crone et al. 2001) 

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