Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Swedish researcher invents fast switching and printable transistor

Abstract:
A fully functional, fast switching and printable transistor in cheap plastic is invented by researcher Lars Herlogsson, Linkoping University in Sweden. All six articles in his doctoral thesis were published in the Advanced Materials journal.

Swedish researcher invents fast switching and printable transistor

Sweden | Posted on September 16th, 2011

The thesis claims that with the help of polymers, plastics, which are already manufactured on a large scale, it is possible to manufacture transistors that are fast and can run on small printed batteries, where the drive voltage is around 1 volt.

They are particularly suitable for printed electronics.

The transistor is made up of two polymers, one of which acts as a semiconductor and the other as an electrolyte; a substance containing mobile charged ions that controls the current flowing through the transistor.

Polymers consist of linked chains of molecules. Thanks to the fact that one type of charged particle in the electrolyte, be it positive or negative ions, binds to the polymer chain in the semiconducting polymer. The active layer, in which the electric field is concentrated in the electrolyte, becomes very thin (1 nanometre) irrespective of the thickness of the electrolyte layer.

Whether it is a negative or positive ion that binds depends on whether it is a transistor that is hole-conducting (p-channel) or if it is electron-conducting (n-channel).

The thin active layer permits the use of very low driving voltages. By combining p- and n-channel transistors, Lars Herlogsson has constructed complementary circuits, CMOS circuits, which reduces the power consumption.

"This is robust CMOS technology which allows for very low drive voltages, and besides that, it is well suited to printed electronics", he says.

To achieve these low drive voltages using conventional technology would require nanometre thin layers. Printing such thin layers is impossible because the printing surface on paper or plastic film is typically rough. However, printing a 100-nanometre thick layer, as in this case, is possible using conventional printing techniques.

The idea of creating a thin active layer also impressed electronics Professor Christer Svensson, now emeritus of the examining committee.

"A scientifically very neat job, an intelligent idea that he clearly showed works in reality. There may be applications for this type of electronics such as in large TV screens where silicon is unable to compete", Svensson says.

The focus of Lars Herlogssons thesis has been to produce a material system for polymer-based organic transistors that can be printed at a reasonable price. The result is a transistor that within traditional electronics is called a field-effect transistor. Four of the thesis articles are related to just that, but the other two articles are related to the following:

one addresses woven electronics where the organic electrolyte transistors are embedded in the intersections between textile microfibers.
The other shows how to produce an organic field-effect transistor with a drop of water as the electrolyte.

All of the six articles in the dissertation have been published in the prestigious scientific journal Advanced Materials.

Now, after spending years on research, Lars Herlogsson has taken a step closer to production. September 1, he began working at the company Thin Film Electronics in Linkoping to develop inexpensive printed memories.

"As scientists, our task is to push the boundaries and show what is practical and possible. Industry can produce the organic electronics better than we can and there are many talented plastic electronics companies, says Magnus Berggren, Professor of organic electronics at Linkoping University.

Thesis: Electrolyte-Gated Organic Thin-Film Transistors, Lars Herlogsson, Department of Science and Technology, Linköping University, Campus Norrköping, 2011

Full bibliographic information

A Water-Gate Organic Field-Effect Transistor by L. Kergoat, L. Herlogsson, D, Braga, B. Piro, M-C. Pham, X. Crispin, M. Berggren and G. Horowitz. Advanced Materials 2010, 22, 2265. DOI: 10.1002/adma.200904163

####

For more information, please click here

Contacts:
Åke Hjelm
+46-13281395

Copyright © AlphaGalileo

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

University of Tehran Researchers Invent Non-Enzyme Sensor to Detect Blood Sugar April 23rd, 2014

Gold nanoparticles help target, quantify breast cancer gene segments in a living cell April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Chip Technology

Harris & Harris Group Notes the Receipt of Proceeds From the Sale of Molecular Imprints' Semiconductor Business to Canon April 22nd, 2014

Progress made in developing nanoscale electronics: New research directs charges through single molecules April 21st, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Scientists open door to better solar cells, superconductors and hard-drives: Research enhances understanding of materials interfaces April 14th, 2014

Discoveries

University of Tehran Researchers Invent Non-Enzyme Sensor to Detect Blood Sugar April 23rd, 2014

Gold nanoparticles help target, quantify breast cancer gene segments in a living cell April 23rd, 2014

Atomic switcheroo explains origins of thin-film solar cell mystery April 23rd, 2014

Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014

Announcements

Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014

NanoSafe, Inc. announces the addition of the Labconco Protector® Glove Box to its NanoSafe Tested™ registry April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Printing/Lithography/Inkjet

Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014

Conductive Inks: booming to $2.8 billion by 2024 April 17th, 2014

Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014

Obducat has launched a new generation of SINDRE® Nano Imprint production system April 11th, 2014

NanoNews-Digest
The latest news from around the world, FREE







  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE