Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Did You Say Flexible Electronics? - Organic electronic devices possible with supercritical carbon dioxide process

Cornell University researchers (left to right) Eisuke Murotani, George Malliaras, Alex Zakhidov, Christopher Ober, Priscilla Taylor, Hon Hang Fong, Jin Kyun Lee and John De Marco. The Cornell team is working with scientists at the University of Melbourne in Australia to develop "flexible electronics" from organic semiconducting materials.

Credit: Christopher K. Ober, Cornell University; people.ccmr.cornell.edu/~cober/
Cornell University researchers (left to right) Eisuke Murotani, George Malliaras, Alex Zakhidov, Christopher Ober, Priscilla Taylor, Hon Hang Fong, Jin Kyun Lee and John De Marco. The Cornell team is working with scientists at the University of Melbourne in Australia to develop "flexible electronics" from organic semiconducting materials.

Credit: Christopher K. Ober, Cornell University; people.ccmr.cornell.edu/~cober/

Abstract:
Someday, moving a large, flat-screen TV across the country might be as simple as taking it off the wall, rolling it up and sliding it into a study tube. That's the vision of researchers Christopher Ober and George Malliaras at Cornell University, and Andrew Holmes at the University of Melbourne, Australia, who are fabricating organic semiconducting materials with a little help from supercritical carbon dioxide, or CO2.

Did You Say Flexible Electronics? - Organic electronic devices possible with supercritical carbon dioxide process

Arlington, VA | Posted on February 2nd, 2009

Organic semiconductors are the main component of a range of future organic electronics, such as flexible flat-panel displays, inexpensive solar cells and advanced medical devices. Because they are energy-efficient, inexpensive and lightweight, organic electronics are expected someday to compose a multi-billion industry.

Electronics today are dominated by inorganic materials, especially silicon. Development of organic electronic devices, necessary for that desired flexibility, has been stymied until now because ordinary solvents used in the photolithographic process are very damaging to active organic materials. The researchers, funded by the National Science Foundation, have developed a new process that instead employs supercritical CO2--a far gentler solvent with properties midway between a gas and a liquid.

Supercritical CO2 is an unusual solvent, not quite polar like water, but not quite non-polar like hydrocarbons. As a result it will not dissolve most organic semiconductors. It also has almost no viscosity, and it will wet everything. That means that only certain molecules or polymers are soluble in it. Researchers take advantage of these unique attributes by designing special photoresists that will work in such an environmentally friendly solvent.

The new fabrication process means layers of organic materials can be stacked and the interface between the layers isn't disturbed in the fabrication process. "The interface region is important for charge transport," Ober said. "If it remains undisturbed, we can fabricate small-scale structures with the same electronic characteristics as current large-scale devices."

With the new technology, electronic displays would be made of organic electronics on a substrate of plastic, which in addition to being flexible, is cheaper, lighter and more durable than current glass displays. Because the display is capable of generating its own light, the image would be would be clear in strong sunlight, another advantage over existing technology.

Smart bandages and solar panels are two additional candidates for organic electronics.

A smart bandage would revolutionize wound treatment. The bandage is something that hasn't changed for 10,000 years. To check a wound's progress, it is still necessary to peel back the bandage. "Smart bandages could monitor wound healing without disturbing the bandage, administer antibiotics as needed and send a medical staff up-to-date information about the wound's treatment," Ober said.

As for solar energy, organic electronics could give the technology a giant step forward. Only a very small fraction of power today is generated by solar cells, which convert solar energy into electricity, because they are expensive to produce and the efficiency of most common panels is only about 10 percent.

"With organic semiconducting materials, the panels would be much smaller, much more efficient and lighter than the current technology, making them much cheaper to produce and easier to mount on buildings," Ober said.

Experts predict if the cost of producing solar cells could be reduced by a factor of 10, solar energy would be not only environmentally favorable, but also economically favorable.

While the U.S. scientists provide expertise in evaluating the properties of materials and in the use of supercritical CO2 in device fabrication, the Australian group brings to the collaboration its synthetic capabilities to provide photo-resist materials designed to work together with supercritical carbon dioxide.

Investigators
Christopher Ober
George Malliaras

Related Institutions/Organizations
Cornell University
University of Melbourne

Locations
New York
Australia

####

About National Science Foundation
The National Science Foundation (NSF) is an independent federal agency that supports fundamental research and education across all fields of science and engineering, with an annual budget of $5.92 billion. NSF funds reach all 50 states through grants to over 1,700 universities and institutions. Each year, NSF receives about 42,000 competitive requests for funding, and makes over 10,000 new funding awards. The NSF also awards over $400 million in professional and service contracts yearly.

For more information, please click here

Contacts:
Diane E. Banegas
(703) 292-8070

Copyright © National Science Foundation

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

Display technology/LEDs/SS Lighting/OLEDs

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

PAM-XIAMEN Offers UV LED wafer April 15th, 2014

Better solar cells, better LED light and vast optical possibilities April 12th, 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

Energy

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

Like a hall of mirrors, nanostructures trap photons inside ultrathin solar cells April 22nd, 2014

Global leader in solar cell manufacturing eyes New York for major expansion outside of Japan: CNSE and Solar Frontier Explore $700 Million Investment, Job Creation in New York State April 22nd, 2014

Nanoreporters tell 'sour' oil from 'sweet': Rice University's hydrogen sulfide nanoreporters gather intel on oil before pumping April 22nd, 2014

Solar/Photovoltaic

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

Like a hall of mirrors, nanostructures trap photons inside ultrathin solar cells April 22nd, 2014

Global leader in solar cell manufacturing eyes New York for major expansion outside of Japan: CNSE and Solar Frontier Explore $700 Million Investment, Job Creation in New York State April 22nd, 2014

High-temperature plasmonics eyed for solar, computer innovation April 17th, 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