Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

Ultrathin device harvests electricity from human motion July 23rd, 2017

The July 23 close fly-by of asteroid 2017 BS5 is explored in a Q&A with Dr. John S. Lewis, chief scientist at Deep Space Industries July 23rd, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Pulses of electrons manipulate nanomagnets and store information: Scientists use electron pulses to create and manipulate nanoscale magnetic excitations that can store data July 21st, 2017

Display technology/LEDs/SS Lighting/OLEDs

Nanoparticles could spur better LEDs, invisibility cloaks July 19th, 2017

Cambridge Nanotherm partners with Inabata for global sales and distribution June 20th, 2017

Leti Will Demo World’s-first WVGA 10-µm Pitch GaN Microdisplays for Augmented Reality Video at Display Week in Los Angles: Invited Paper also Will Present Leti’s Success with New Augmented Reality Technology That Reduces Pixel Pitch to Less than 5 Microns May 22nd, 2017

CCNY physicists demonstrate photonic hypercrystals for control of light-matter interaction May 5th, 2017

Discoveries

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Pulses of electrons manipulate nanomagnets and store information: Scientists use electron pulses to create and manipulate nanoscale magnetic excitations that can store data July 21st, 2017

The first light atomic nucleus with a second face July 20th, 2017

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Announcements

Ultrathin device harvests electricity from human motion July 23rd, 2017

The July 23 close fly-by of asteroid 2017 BS5 is explored in a Q&A with Dr. John S. Lewis, chief scientist at Deep Space Industries July 23rd, 2017

Scientists announce the quest for high-index materials: All-dielectric nanophotonics: The quest for better materials and fabrication techniques July 22nd, 2017

Pulses of electrons manipulate nanomagnets and store information: Scientists use electron pulses to create and manipulate nanoscale magnetic excitations that can store data July 21st, 2017

Energy

'Upconverted' light has a bright future: Rice University professor developing plasmon-powered devices for medicine, security, solar cells July 17th, 2017

Making two out of one: FAU researchers have explained the mechanism behind a process that can increase the efficiency of organic solar cells July 12th, 2017

Argonne National Laboratory’s Continuous ALD Technology Licensed Exclusively to Forge Nano July 7th, 2017

Tiny bubbles provide tremendous propulsion in new microparticles research-Ben-Gurion U. June 21st, 2017

Solar/Photovoltaic

'Upconverted' light has a bright future: Rice University professor developing plasmon-powered devices for medicine, security, solar cells July 17th, 2017

Making two out of one: FAU researchers have explained the mechanism behind a process that can increase the efficiency of organic solar cells July 12th, 2017

Thinking thin brings new layering and thermal abilities to the semiconductor industry: In a breakthrough for the semiconductor industry, researchers demonstrate a new layer transfer technique called "controlled spalling" that creates many thin layers from a single gallium nitride July 11th, 2017

Tiny bubbles provide tremendous propulsion in new microparticles research-Ben-Gurion U. June 21st, 2017

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