Featured Research

from universities, journals, and other organizations

Physicists' findings improve quality of flexible, conductive, transparent glass

Date:
June 26, 2014
Source:
Binghamton University, State University of New York
Summary:
A new technique will improve the quality of flexible, conductive, transparent glass. Companies such as Sharp and LG already use a-IGZO in some high-end displays. It's also found in Apple's new iPad Air. But it has been difficult to maintain transparency and conductivity: In some samples, experts said, the material took on a brown or yellow tinge that would harm the display's performance. New research addresses the problem.

A new technique developed by a Binghamton University physicist and his colleagues will improve the quality of flexible, conductive, transparent glass.
Credit: Image courtesy of Binghamton University, State University of New York

A new technique developed by a Binghamton University physicist and his colleagues will improve the quality of flexible, conductive, transparent glass. (The sort that's needed for Minority Report-style giant computer displays.)

Related Articles


Louis Piper's research focuses on metal oxides, a class of materials that includes some of the best insulators as well as some of the best conductors in use today. He and his colleagues, writing this month in the journal Applied Physics Letters, suggest a new method for manufacturing amorphous indium gallium zinc oxide (a-IGZO), a ceramic that looks like glass and can behave like metal, or even like silicon.

Companies such as Sharp and LG already use a-IGZO in some high-end displays. It's also found in Apple's new iPad Air. But it has been difficult to maintain transparency and conductivity: In some samples, Piper said, the material took on a brown or yellow tinge that would harm the display's performance.

Using X-ray photoelectron spectroscopy to examine the chemical composition and electronic structure of a-IGZO, Piper and his colleagues tested 50 samples, each about a centimeter square and a micron thick. Previous studies have worked with fewer than five samples; this larger effort enabled the physicists to observe trends and conduct data analysis.

The surprising finding of these elaborate experiments? The deep subgap feature, which caused the discoloration in the material, is the result of local variation in oxygen coordination, rather than oxygen vacancies. "There was a lot of detective work," Piper said. "Several models had suggested missing oxygen played an important role, but our data showed otherwise."

Eventually, computations conducted by theorists at the University of Bath backed up the experimental findings from Binghamton: Oxygen that has too few positive metal ions surrounding it seems to be the cause of the subgap.

The team not only identified the reason for the subgap feature; it also developed a way to resolve the problem. Low-temperature annealing -- heating at 390 degrees Fahrenheit (a temperature you might use when baking a pizza) -- allows a-IGZO to retain its conductive properties but removes the subgap states, Piper said.

Bottom line, he said: "You don't have to sacrifice transparency for conductivity."

Creating a more reliable production process for a-IGZO will save electronics manufacturers money. It could also reduce energy use, as a fully transparent display can take advantage of ambient light and does not require as much backlighting.


Story Source:

The above story is based on materials provided by Binghamton University, State University of New York. The original article was written by Rachel Coker. Note: Materials may be edited for content and length.


Journal Reference:

  1. S. Sallis, K. T. Butler, N. F. Quackenbush, D. S. Williams, M. Junda, D. A. Fischer, J. C. Woicik, N. J. Podraza, B. E. White, A. Walsh, L. F. J. Piper. Origin of deep subgap states in amorphous indium gallium zinc oxide: Chemically disordered coordination of oxygen. Applied Physics Letters, 2014; 104 (23): 232108 DOI: 10.1063/1.4883257

Cite This Page:

Binghamton University, State University of New York. "Physicists' findings improve quality of flexible, conductive, transparent glass." ScienceDaily. ScienceDaily, 26 June 2014. <www.sciencedaily.com/releases/2014/06/140626121701.htm>.
Binghamton University, State University of New York. (2014, June 26). Physicists' findings improve quality of flexible, conductive, transparent glass. ScienceDaily. Retrieved April 1, 2015 from www.sciencedaily.com/releases/2014/06/140626121701.htm
Binghamton University, State University of New York. "Physicists' findings improve quality of flexible, conductive, transparent glass." ScienceDaily. www.sciencedaily.com/releases/2014/06/140626121701.htm (accessed April 1, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, April 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

7-Year-Old Girl Gets 3-D Printed 'robohand'

7-Year-Old Girl Gets 3-D Printed 'robohand'

AP (Mar. 31, 2015) Although she never had much interest in prosthetic limbs before, Faith Lennox couldn&apos;t wait to slip on her new robohand. The 7-year-old, who lost part of her left arm when she was a baby, grabbed it as soon as it came off a 3-D printer. (March 31) Video provided by AP
Powered by NewsLook.com
Dutch Architects Show Off 3D House-Building Prowess

Dutch Architects Show Off 3D House-Building Prowess

Reuters - Innovations Video Online (Mar. 31, 2015) Dutch architects are constructing a 3D-printed canal-side home, which they hope will spark an environmental revolution in the house-building industry. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Solar Plane Stops in China

Solar Plane Stops in China

Reuters - News Video Online (Mar. 31, 2015) Solar Impulse 2 stops over in China&apos;s Chonqing, completing the fifth leg in its bid to become the first solar powered plane to travel around the globe. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Solar Impulse Lands in China After 20-Hour Flight from Myanmar

Solar Impulse Lands in China After 20-Hour Flight from Myanmar

AFP (Mar. 31, 2015) Solar Impulse 2 lands in China, the world&apos;s biggest carbon emitter, completing the fifth leg of its landmark global circumnavigation powered solely by the sun. Duration: 00:55 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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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