Navigation Links
UCLA team develops highly efficient method for creating flexible, transparent electrodes
Date:11/22/2011

As the market for liquid crystal displays and other electronics continues to drive up the price of indium -- the material used to make the indium tin oxide (ITO) transparent electrodes in these devices -- scientists have been searching for a less costly and more dynamic alternative, particularly for use in future flexible electronics.

Besides its high price, ITO has several drawbacks. It's brittle, making it impractical for use in flexible displays and solar cells, and there is a lack of availability of indium, which is found primarily in Asia. Further, the production of ITO films is relatively inefficient.

Now, researchers at UCLA report in the journal ACS Nano that they have developed a unique method for producing transparent electrodes that uses silver nanowires in combination with other nanomaterials. The new electrodes are flexible and highly conductive and overcome the limitations associated with ITO.

For some time, silver nanowire (AgNW) networks have been seen as promising candidates to replace ITO because they are flexible and each wire is highly conductive. But complicated treatments have often been required to fuse crossed AgNWs to achieve low resistance and good substrate adhesion. To address this, the UCLA researchers demonstrated that by fusing AgNWs with metal-oxide nanoparticles and organic polymers, they could efficiently produce highly transparent conductors.

The team of researchers represents a collaboration between the department of materials science and engineering at the UCLA Henry Samueli School of Engineering and Applied Science; the department of chemistry and biochemistry in the UCLA College of Letters and Science; and the California NanoSystems Institute (CNSI) at UCLA.

The team was led by Yang Yang, a professor of materials science and engineering, and Paul Weiss, director of the CNSI and a professor of materials science and engineering and of chemistry and biochemistry.

"In this work, we demonstrate a simple and effective solution method to achieve highly conductive AgNW composite films with excellent optical transparency and mechanical properties," said Yang who also directs the Nano Renewable Energy Center at the CNSI. "This is by far the best solution: a processed, transparent electrode that is compatible with a wide variety of substrate choices."

Scientists can easily spray a surface with the nanowires to make a transparent mat, but the challenge is to make the silver nanowires adhere to the surface more securely without the use of extreme temperatures (200 C) or high pressures, steps that make the nanomaterials less compatible with the sensitive organic materials typically used to make flexible electronics.

To meet this challenge, Rui Zhu, the paper's first author, developed a low-temperature method to make high-performance transparent electrodes from silver nanowires using spray coating of a unique combination of nanomaterials.

First, researchers sprayed a solution of commercially available silver nanowires onto a surface. They then treated the nanowires with a solution of titanium dioxide nanoparticles to create a hybrid film. As the film dries, capillary forces pull the nanowires together, improving the film's conductivity. The scientists then coated the film with a layer of conductive polymer to increase the wires' adhesion to the surface.

The AgNW composite meshes are highly conductive, with excellent optical transparency and mechanical properties. The team also built solar cells using the new electrodes and found that their performance was comparable to that of solar cells made with indium tin oxide.


'/>"/>
Contact: Jennifer Marcus
jmarcus@cnsi.ucla.edu
310-267-4839
University of California - Los Angeles
Source:Eurekalert

Related biology technology :

1. NASA develops super-black material that absorbs light across multiple wavelength bands
2. Rice University lab develops technique to control light from nanoparticles
3. iSpeech® Develops Audio Reader for Elseviers SciVerse Applications
4. Pixel perfect: Cornell develops a lens-free, pinhead-size camera
5. Veredus Laboratories Develops Lab-on-Chip Solution to Detect and Differentiate Several Food-Borne Pathogens, Including Escherichia coli (E. coli)
6. University of Houston develops method for creating single-crystal arrays of graphene
7. NJIT professor develops a biologically inspired catalyst, an active yet inert material
8. New England Biolabs Develops Novel Small RNA NGS Protocol: Reagents Improve Yield and Decrease Adaptor-Dimer Formation
9. Pitt-led team develops nanoscale light sensor compatible with Etch-a-Sketch nanoelectronic platform
10. Transgenomic Develops New Assays to Detect EGFR Mutations Using COLD-PCR
11. iDiverse Develops Stress Resistant Yeast for Producing Fuel Ethanol
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/19/2016)... , May 19, 2016 ... una sessione orale durante il 52 ° ... n. 8006)    - Le conclusioni dello ... riguarda i pazienti trattati, di cui il 90% presenta una ... sei mesi o più. Il settantadue per cento dei pazienti ...
(Date:5/18/2016)... ... May 18, 2016 , ... STACS DNA Inc., the ... easily track and report sexual assault kit processing to help them save time and ... pressure escalates for kits to be processed and victims informed of results. Due to ...
(Date:5/17/2016)... , May 18, 2016 Haselmeier ... prefilled pen following approval by EMA, the European Medicines ... science and technology company, the new pen version includes ... increased level of confidence to patients during use. ... prefilled pen easier to handle with a larger display ...
(Date:5/17/2016)... ... , ... The Children’s Tumor Foundation is enthusiastic to announce that in honor ... support in the fight against neurofibromatosis (NF) by lighting up blue and green, the ... tumors to grow on nerves throughout the body. It affects 1 in 3,000 people ...
Breaking Biology Technology:
(Date:3/22/2016)... , March 22, 2016 ... report "Electronic Sensors Market for Consumer Industry by Type ... Others), Application (Communication & IT, Entertainment, Home ... Global Forecast to 2022", published by MarketsandMarkets, ... expected to reach USD 26.76 Billion by ...
(Date:3/15/2016)... --> --> ... Research "Digital Door Lock Systems Market - Global Industry Analysis, ... global digital door lock systems market in terms of revenue ... forecast to grow at a CAGR of 31.8% during the ... enterprises (MSMEs) across the world and high industrial activity driving ...
(Date:3/11/2016)... --> --> ... Recognition Market by Technology (Pattern Recognition), by Component (Hardware, ... Type (On-Premises and Cloud), by Industry Vertical and by ... the global market is expected to grow from USD ... 2020, at a CAGR of 19.1%. , ...
Breaking Biology News(10 mins):