Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New Low-Cost, Transparent Electrodes

01.07.2013
Indium tin oxide (ITO) has become a standard material in light-emitting diodes, flat panel plasma displays, electronic ink and other applications because of its high performance, moisture resistance, and capacity for being finely etched.

But indium is also rare and expensive, and it requires a costly deposition process to make opto-electronic devices and makes for a brittle electrode. Replacing indium as the default material in transparent electrodes is a high priority for the electronics industry.

Now, in a paper appearing in APL Materials, a new open-access journal produced by AIP Publishing, researchers report creating a sturdy, transparent, and indium-free electrode from silver (Ag) and titanium dioxide (TiO2) that could replace indium-based electrodes in some applications.

"Silver and titanium are much more abundant than indium in the earth's crust, and so we anticipate that electronic devices based on silver and titanium dioxide would be a more sustainable materials system and be manufactured at a low cost," said T.L. Alford, a professor of Materials Science and Engineering at Arizona State University who led the research.

The TiO2/Ag/TiO2 composite electrode multilayer film the researchers studied has been well characterized in the literature, but the team optimized both the thickness of the silver layer and the manufacturing process so that the multilayer film has a low sheet resistance and high optical transmittance, both properties necessary for high-performance.

The researchers created films with a sheet resistance as low as one sixth of that achieved by previous studies, while maintaining approximately 90 percent optical transmittance. With the choice of an underlying substrate made of polyethylene napthalate (PEN) -- a sturdy polymer used in a variety of applications from bottling carbonated beverages to manufacturing flexible electronics -- the researchers added additional durability.

Because of a less expensive manufacturing process and the wide availability of titanium dioxide, silver and PEN, the new TiO2/Ag/TiO2 thin film could one day help make devices such as electronic displays and solar cells more affordable by replacing more expensive indium-based electrodes.

The article, "High Quality Transparent TiO2/Ag/TiO2 Composite Electrode Films Deposited on Flexible Substrate at Room Temperature by Sputtering" is authored by Aritra Dhar and T. L. Alford. The paper is among the first to appear in the new journal Applied Physics Letters-Materials, which is published by the AIP Publishing. See: http://dx.doi.org/10.1063/1.4808438

ABOUT THE JOURNAL
APL Materials is a new open access journal featuring original research on significant topical issues within the field of materials science. See: http://aplmaterials.aip.org

Jason Socrates Bardi | Newswise
Further information:
http://www.aip.org

More articles from Materials Sciences:

nachricht Serendipity uncovers borophene's potential
23.02.2017 | Northwestern University

nachricht Switched-on DNA
20.02.2017 | Arizona State University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>