Featured Research

from universities, journals, and other organizations

Engineers make world's fastest organic transistor, herald new generation of see-through electronics

Date:
January 8, 2014
Source:
Stanford School of Engineering
Summary:
Researchers have produced the world's fastest thin-film organic transistors, proving that this experimental technology could achieve the performance needed for high-resolution television screens and similar electronic devices. For years engineers have been trying to use inexpensive, carbon-rich molecules and plastics to create organic semiconductors that can approximate the performance of costlier technologies based on silicon.

Transparent transistors on glass Transparent transistors on this postage-stamp size glass have speed characteristics rivaling some forms of silicon transistors. The device used a new process to make this world record-setting organic transistor, paving the way for a new generation of cheap, transparent electronic devices.
Credit: Jinsong Huang and Yongbo Yuan

Teams from Stanford and the University of Nebraska-Lincoln collaborate to make thin, transparent semiconductors that could become the foundation for cheap, high-performance displays.

Two university research teams have worked together to produce the world's fastest thin-film organic transistors, proving that this experimental technology has the potential to achieve the performance needed for high-resolution television screens and similar electronic devices.

For years engineers the world over have been trying to use inexpensive, carbon-rich molecules and plastics to create organic semiconductors capable of performing electronic operations at something approaching the speed of costlier technologies based on silicon. The term "organic" was originally confined to compounds produced by living organisms but now extended to include synthetic substances based on carbons and includes plastics.

In the Jan. 8 edition of Nature Communications, engineers from the University of Nebraska-Lincoln (UNL) and Stanford University show how they created thin-film organic transistors that could operate more than five times faster than previous examples of this experimental technology.

Research teams led by Zhenan Bao, professor of chemical engineering at Stanford, and Jinsong Huang, assistant professor of mechanical and materials engineering at UNL used their new process to make organic thin-film transistors with electronic characteristics comparable to those found in expensive, curved-screen television displays based on a form of silicon technology.

They achieved their speed boost by altering the basic process for making thin-film organic transistors.

Typically, researchers drop a special solution, containing carbon-rich molecules and a complementary plastic, onto a spinning platter -- in this case, one made of glass. The spinning action deposits a thin coating of the materials over the platter.

In their Nature Communications paper, the collaborators describe two important changes to this basic process.

First they spun the platter faster. Second they only coated a tiny portion of the spinning surface, equivalent to the size of a postage stamp.

These innovations had the effect of depositing a denser concentration of the organic molecules into a more regular alignment. The result was a great improvement in carrier mobility, which measures how quickly electrical charges travel through the transistor.

The researchers called this improved method "off-center spin coating." The process remains experimental, and the engineers cannot yet precisely control the alignment of organic materials in their transistors or achieve uniform carrier mobility.

Even at this stage, off-center spin coating produced transistors with a range of speeds much faster than those of previous organic semiconductors and comparable to the performance of the polysilicon materials used in today's high-end electronics.

Further improvements to this experimental process could lead to the development of inexpensive, high-performance electronics built on transparent substrates such as glass and, eventually, clear and flexible plastics.

Already, the researchers have shown that they can create high-performance organic electronics that are 90 percent transparent to the naked eye.

Other key members of the research teams included Yongbo Yuan, a postdoctoral associate at UNL's Nebraska Center for Materials and Nanoscience, Gaurav Giri, a graduate student in chemical engineering at Stanford and Alex Ayzner, a postdoctoral researcher at the Stanford Synchrotron Radiation Lightsource.

The work was funded by the U.S. Defense Advanced Research Projects Agency (DARPA), the Air Force Office of Scientific Research and the National Science Foundation.


Story Source:

The above story is based on materials provided by Stanford School of Engineering. The original article was written by Tom Abate. Note: Materials may be edited for content and length.


Journal Reference:

  1. Yongbo Yuan, Gaurav Giri, Alexander L. Ayzner, Arjan P. Zoombelt, Stefan C. B. Mannsfeld, Jihua Chen, Dennis Nordlund, Michael F. Toney, Jinsong Huang, Zhenan Bao. Ultra-high mobility transparent organic thin film transistors grown by an off-centre spin-coating method. Nature Communications, 2014; 5 DOI: 10.1038/ncomms4005

Cite This Page:

Stanford School of Engineering. "Engineers make world's fastest organic transistor, herald new generation of see-through electronics." ScienceDaily. ScienceDaily, 8 January 2014. <www.sciencedaily.com/releases/2014/01/140108154502.htm>.
Stanford School of Engineering. (2014, January 8). Engineers make world's fastest organic transistor, herald new generation of see-through electronics. ScienceDaily. Retrieved August 21, 2014 from www.sciencedaily.com/releases/2014/01/140108154502.htm
Stanford School of Engineering. "Engineers make world's fastest organic transistor, herald new generation of see-through electronics." ScienceDaily. www.sciencedaily.com/releases/2014/01/140108154502.htm (accessed August 21, 2014).

Share This




More Matter & Energy News

Thursday, August 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Flower Power! Dandelions Make Car Tires?

Flower Power! Dandelions Make Car Tires?

Reuters - Business Video Online (Aug. 20, 2014) Forget rolling on rubber, could car drivers soon be traveling on tires made from dandelions? Teams of scientists are racing to breed a type of the yellow flower whose taproot has a milky fluid with tire-grade rubber particles in it. As Joanna Partridge reports, global tire makers are investing millions in research into a new tire source. Video provided by Reuters
Powered by NewsLook.com
Awesome New Camouflage Sheet Was Inspired By Octopus Skin

Awesome New Camouflage Sheet Was Inspired By Octopus Skin

Newsy (Aug. 19, 2014) Scientists have developed a new device that mimics the way octopuses blend in with their surroundings to hide from dangerous predators. Video provided by Newsy
Powered by NewsLook.com
Researcher Testing on-Field Concussion Scanners

Researcher Testing on-Field Concussion Scanners

AP (Aug. 19, 2014) Four Texas high school football programs are trying out an experimental system designed to diagnose concussions on the field. The technology is in response to growing concern over head trauma in America's most watched sport. (Aug. 19) Video provided by AP
Powered by NewsLook.com
Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

AFP (Aug. 19, 2014) A solar cell that resembles a flower is offering a new take on green energy in Japan, where one scientist is searching for renewables that look good. Duration: 01:29 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins