Full control of plastic transistors

May 16, 2012

In an article in the highly ranked interdisciplinary journal PNAS, Loïg Kergoat, a researcher at Linköping University, describes how transistors made of plastic can be controlled with great precision.

The Organic Electronics Research Group at Linköping University (LiU) in Sweden, led by Professor Magnus Berggren, attracted great attention a year ago when Lars Herlogsson showed in his doctoral thesis that it was possible to construct fully functional field-effect out of plastic.

Kergoat, a post-doc in the same research group, now shows that transistors made of plastic can be controlled with great precision.

If a transistor is to be usable in a logic circuit, the threshold voltage, where the transistor switches from off to on, or zero to one, must be well defined. Kergoat has now shown that by changing the material on the gate electrode, the electrode in a transistor that governs the current through both the other electrodes, the threshold voltage can also gradually be shifted.

"Transistors built from organic electronics need to be able to be controlled with weak voltages, preferably as close to zero as possible," Kergoat says.

By changing the electrode material, for example from gold to calcium, the threshold voltage is reduced by as much as 0.9V.

"This means that we can control exactly one of the most important properties of our transistors, which is of great significance now that we're building circuits of various types," Berggren says.

Research was conducted in collaboration between the Organic Electronics Group in the Linköping University Department of Science and Technology and a research group at the Université Paris Diderot, Paris 7, where Berggren was a guest professor between 2009 and 2011.

Explore further: Chemically driven micro- and nanomotors

More information: "Tuning the Threshold Voltage in Electrolyte-Gated Organic Field-Effect Transistors", Proceedings of the National Academy of Sciences, online May 14, 2012, doi: 10.1073/pnas.1120311109

add to favorites email to friend print save as pdf

Related Stories

Sensor of plastic can be produced in a printing press

Feb 08, 2005

Electrochemical transistors made of plastic open myriad possibilities. Since both electrons and ions are active, they can function as a bridge between traditional electronics and biological systems. A new dissertation from ...

Intel and QinetiQ Collaborate On Transistor Research

Feb 09, 2005

The results of a two-year joint research programme by Intel Corporation and QinetiQ into new transistor technology that could become a promising candidate for making microprocessors in the middle of the next decade was made ...

Organic chips - not just in your kitchen anymore

Feb 22, 2011

(PhysOrg.com) -- IMEC researchers at the International Solid-State Circuits Conference, in San Francisco, California are expected to introduce a microprocessor made with organic semiconductors.

Recommended for you

Chemically driven micro- and nanomotors

12 hours ago

At least since the movie "The Fantastic Voyage" in 1966, in which a submarine is shrunk down and injected into the blood stream of a human, people have been toying with the idea of sending tiny "micromachines" ...

Pyramid nanoscale antennas beam light up and down

14 hours ago

Researchers from FOM Institute AMOLF and Philips Research have designed and fabricated a new type of nanoscale antenna. The new antennas look like pyramids, rather than the more commonly used straight pillars. ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.