Organic Field Effect Transistor

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Revision as of 03:32, 28 October 2009 by Bonificio (Talk | contribs) (Applications)

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Cross section of metal-oxide semiconductor field effect transistor.

An organic field effect transistor is a field effect transistor that uses an organic semiconductor in its channel. The advantages of using an organic are their low cost, ease of fabrication, especially for complex geometries, and perhaps most importantly for future applications, their flexibility. The most popularly used organic semiconductor for this application is pentacene.

The structure of pentacene, a common organic semiconductor.


An exciting application to OFETs is their optical properties that can be used for visual displays. OFETS can carry charges and conduct electron, thus it can be used as a light emitting device. The first light emitting field effect transistor was fabricated in 2003 by a german group. They used a polycrystalline tetracine thin film bridge between a gold electrodes that acted as the electron source and sink. When electrons and holes are injected into this OFET, electroluminescence occurs in the organic bridge.

Reverse Micelles

Reverse micelles are the opposite of typical micelles - they form in a hydrophobic environment. These micelles have the hydrophilic heads aggregating in the center of the sphere, with the hydrophobic tailes pointing outwards. These micelle are used to form miniature test tubes because they create a nanoscale hydrophilic environment at their center where reactions can occur. One application of these is the formation of quantum dots at the center of these reverse micelles.