by Staff Writers
Linkoping, Sweden (SPX) May 22, 2012
In an article in the highly ranked interdisciplinary journal PNAS, Loig Kergoat, a researcher at Linkoping University, describes how transistors made of plastic can be controlled with great precision.
The Organic Electronics Research Group at Linkoping 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 transistors 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 Linkoping University Department of Science and Technology and a research group at the Universite Paris Diderot, Paris 7, where Berggren was a guest professor between 2009 and 2011. Article: "Tuning the Threshold Voltage in Electrolyte-Gated Organic Field-Effect Transistors", PNAS, the Proceedings of the National Academy of Sciences of the United States, online May 14, 2012, doi: 10.1073/pnas.1120311109
Computer Chip Architecture, Technology and Manufacture
Nano Technology News From SpaceMart.com
Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.
Researchers map path to quantum electronic devices
Durham NC (SPX) May 16, 2012
A team of Duke University engineers has created a master "ingredient list" describing the properties of more than 2,000 compounds that might be combined to create the next generation of quantum electronics devices. The goal is topological insulators (TI), man-made crystals that are able to conduct electrical current on their surfaces, while acting as insulators throughout the interior of t ... read more
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2012 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|