Polymer field-effect transistor frequency

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. 

In 2005, Philips, which invests around 10% of its sales income on research and development, claimed a new research breakthrough with a polymer-based memory which is non-volatile, that is to say it will not lose data when the power supply is switched off. The technology involves the use of a field-effect transistor in which the gate dielectric is composed of a polymer ferro-electric material. Applications include the ability to make low-cost radio-frequency identification tags (RFID), a product which is being widely introduced into logistics and retail businesses with reported world production estimates of some 1.3 billion tags in 2005. 

High performance electrical or optoelectrical devices, such as LEDs, field effect transistors (o-FET), and PV cells, fabricated from conjugated polymers have been demonstrated [233-236]. Also, a number of important prototypes have been demonstrated in this emerging plastic electronics technology such as multi- and full-color displays and radio-frequency transponders [237]. The properties of the conjugated polymers discussed in this chapter are presented in Table 3. 

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