Thin field-effect characteristics

The aim of this chapter is to present a simple but general band structure picture of the metal-semiconductor interface and compare that with the characteristics of the metal-conjugated polymer interface. The discussion is focused on the polymer light emitting diode (LED) for which the metal-polymer contacts play a central role in the performance of the device. The metal-polymer interface also applies to other polymer electronic devices that have been fabricated, e.g., the thin-film field-effect transistor3, but the role of the metal-polymer interface is much less cruical in this case and... 

Yanagi, H., Araki, Y., Ohara, T., Hotta, S., Ichikawa, M. andTaniguchi, Y. (2003) Comparative carrier transport characteristics on organic field-effect transistors with vapor deposited thin films and epitaxially grown crystals of biphenyl-capped thiophene oligomers. Advanced Functional Materials, 13, 767-73. 

Rashmi, V.R. Balakrishnan, A.K. Kapoor, V. Kumar, S.C. Jain, R. Mertens, S. An-napoorni, Effect of field dependent trap occupancy on organic thin film transistor characteristics, J. Appl. Phys. 94 (2003) 5302-5306. 

Kudo, K., M. lizuka, S. Kuniyoshi, and K. Tanaka. 2001. Device characteristics of lateral and vertical type organic field effect transistors. Thin Solid Films 393 362-367. 

Flexible picene thin film field-effect transistors have been fabricated using a gate dielectric from poly(tetra-lluoro-/7-xylylene) on a poly(ethylene terephthalate) substrate [39]. These field-effect transistors show /I-channel output/transfer characteristics. A sensing effect for oxygen is observed. The hysteresis in the transfer curves is negligible. The parylene gate can eliminate a reduction in the drain current. 

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