Organic field-effect transistors frequency

To reach this frequency is in no way trivial, and in particular requires a minimum mobility of charge carriers within the organic field effect transistors. This important issue will be discussed below. It has to be noted, however, that in view of the technological applications, a reliable and constant device performance may be even more important than a peak performance of the individual circuits. 

As a low-cost alternative to traditional inorganic semiconductors based transistors, organic field effect transistors are ideally positioned for applications such as radio frequency ID tags, sensors, and smart banknotes [36-40]. An archetypical structure of a bottom-gate top-contact OFET is shown in Scheme 3.7a. Other device architectures have also been employed depending on the relative... 

In addition to applications as functional materials in OLEDs and OSCs, semiconducting polymers are needed for other (opto)electronic devices as well. With regard to displays, sensors, and radio-frequency identification tags (RFIDs) for example, it is a challenge to create polymer-based organic transistors (thin-film transistors, OTFT field-effect transistors, OFETs). Figure 6.7 sketches an optional OFET design, and additionally shows schematically its principle of operation. 

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