Flexible organic transistor

Flexible organic transistors have been attractive for driving electronic devices such as paper-like displays, low-cost identification tags, and flexible photovoltaic cells. These devices may not be fabricated using conventional inorganic materials. In order to commercialize such devices, it is necessary... 

Klauk, H., Hahk, M., Zschieschang, U., Eder, F., Schmid, G. and Dehm, Ch. (2003) Pentacene organic transistors and ring oscillators on glass and on flexible polymeric substrates. Appl Phys. Lett., 82, 4175-4177. 

Gelinck, G. H. et al. 2004. Flexible active-matrix displays and shift registers based on solution-processed organic transistors. Nature Mater. 3 106-110. 

Cao, Q. et al. 2006. Transparent flexible organic thin-film transistors that use printed single-walled carbon nanotube electrodes. Appl. Phys. Lett. 88 113511. 

Project (by Sarnoff Corp with DuPont de Nemours and Co Central Research and Development) to print organic transistors on plastic for electronic displays and circuits. The goal is to develop materials, thin flexible plastic substrates, and methods for continuous high-resolution printing. 

J.B.P.H. Geuns, T.C.T. Beenhakkers, M. Giesbers, B. Huisman, B.-H. Mena Benito, E. Touwslager, F.J. Marsman, A. van Rens B. and de Leeuw, D.M. (2004) Flexible active-matrix displays and shift registers based on solution-processed organic transistors. Nature Mater., 3, 106— 110. 

In this chapter we review recent progress of organic transistors for sensor applications. Emphasis is put on large-area, flexible pressure sensors suitable for electronic artificial skin and for photodetectors suitable for sheet image scanners. We also describe future prospects of large-area sensors and the other issues. 

Fig. 16.1. A flexible, large-area pressure sensor. A plastic film with organic transistors (1),...

In this scheme we have overcome the above problem by introducing organic transistor integrated circuits as a flexible active matrix to read out pressure images, or distribution of pressure. As a result, we have successfully developed large-area, flexible pressure sensors with the number of pressure sensors exceeding 1,000. As shown in Fig. 16.2, the device is manufactured by laminating four different functional films ... 

Someya, T., Kato, Y., Sekitani, T., Iba, S., Noguchi, Y, Murase, Y, Kawaguchi, H., and Sakurai, T., Conformable, flexible, large-area networks of pressure and thermal sensors with organic transistor active matrixes, Proc. Natl. Acad. Sci. U.S.A., 102, 12321, 2005. 

Huitema, H.E.A. et al., A flexible QVGA display with organic transistors, Proc. 2003 Int. Display Workshop, Fukuoka, Japan, 1664, 2003. 

In 2004, Someya et al. [24] improved the fabrication technique for these devices and developed an electronic artificial skin. In this work, once again, organic transistors were not used as sensors in themselves but as addressing elements of a flexible matrix which was used to read out pressure maps... 

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