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Wrapping graphene oxide around copper nanowires improves its stability in air

Feb 09, 2016

Researchers at the University of California at Berkeley and the Lawrence Berkeley National Laboratory have developed a new solution-based, cost-effective way to wrap reduced graphene oxide around the surface of ultrathin transparent conducting copper nanowires. The technique aims to significantly improve the stability of the wires in air and reduce the amount of light scattered by the materials.

Graphene-oxide to wrap around copper nanowires image

Thin films made of the wires might be used in optoelectronics devices, particularly in displays and flexible electronics. Metal nanowire films could make good replacements for the expensive and brittle indium tin oxide (ITO) in next-generation electronics, thanks to their excellent electrical and optical properties and the fact that they can be easily processed in solution.

Will Samsung incorporate graphene electrodes in their upcoming OLED TVs?

Jan 07, 2016

The OLED Association, a trade group that promotes OLED technologies, published an interesting article in which they give predictions for the OLED market. The Association sees Samsung returning to the OLED TV market in 2017, and those upcoming OLED TVs will use several new technologies - including graphene-based transparent electrodes.

Samsung curved OLED TV launch photo 2

Samsung OLED TV (2013)

Last month we reported that researchers at Korea's ETRI developed transparent graphene-based electrodes for OLED panels. The researchers say that these new electrodes improve the transparency and "image quality" of OLEDs by 40 to 60 percent, compared to current silver-based electrodes. The researchers aim to continue the research and improve the performance of their electrodes.

New transparent graphene-based electrode to improve the transparency and quality of OLED displays

Dec 18, 2015

Researchers at Korea's ETRI (Electronics and Telecommunications Research Institute) developed transparent graphene-based electrodes for OLED panels. The researchers say that these new electrodes improve the transparency and "image quality" of OLEDs by 40 to 60 percent, compared to current silver-based electrodes.

LG Display 5.5-inch' flexible AMOLED panel (SID 2015)A flexible OLED prototype (LGD)

The researchers explain that current metal (mostly silver) based electrodes have a limited viewing angle because of their internal light reflection, and the external light reflection affects the image quality. Graphene electrodes are more transparent and reduce the reflectance by 40-60 percent.

Graphene layer protects silver nanowires from radiation damages

Nov 11, 2015

Researchers at Purdue University suggest wrapping silver nanowires with an ultrathin layer of graphene can protect the structures from damage and could represent a key to realizing their commercial potential. Silver nanowires are known to hold promise for applications such as flexible displays and solar cells, but their susceptibility to damage from UV radiation and harsh environmental conditions has limited their commercialization.

Graphene protects silver nanowires image

The scientists state that Devices made from silver nanowires and graphene could find uses in solar cells, flexible displays for computers and consumer electronics, future "optoelectronic" circuits and more, since that graphene "extracts and spreads" most of the thermal energy away from the nanowires. Raman spectroscopy was performed by the Purdue Department of Physics and Astronomy and findings showed the graphene sheathing protected the nanowires even while being subjected to 2.5 megawatts of energy intensity per square centimeter from a high-energy laser, which vaporizes the unwrapped wires. The unwrapped wires were damaged with an energy intensity as little as .8 megawatts per square centimeter. The graphene also helps to prevent moisture damage.

Thomas Swan extends graphene product portfolio

Oct 31, 2015

Thomas Swan has announced the availability of two new graphene grades: Elicarb Electrical Grade Graphene Powder for conductive inks and Elicarb Materials Grade Graphene Powder for composites & plastics. In combination with the company's existing products of Elicarb Premium Grade Graphene Powder and Elicarb Premium Grade Graphene Dispersion (AQ) which are meant for electronics & displays applications, the company now provides a full suite of graphene products.

Thomas Swan's new graphene products image

Thomas Swan states that it continues to focus on reliably delivering high quality, consistent graphene products via the Direct Exfoliation process which extracts graphene directly from graphite raw materials. By tuning its extraction process, the company can produce graphene products that range from the Few Layer Graphene through to the Multi-Layer graphene nanoplatelet. 

Haydale's GNPs used in functional graphene ink

Oct 29, 2015

Haydale recently announced that its proprietary HDPlas technology has been used to create functionalized Graphene Nanoplatelets (GNPs) that have been incorporated into a functional graphene ink, which has been developed for screen printing. The ink has been created with area printing applications in mind.

Haydale graphene ink image

A recent report details how a screen-printable functional graphene based ink, supplied by Goodfellow, performs better than many normal carbon-based ink, opening the door to innovative applications that require enhanced electrical conductivity, excellent adhesion on a range of substrates and high print resolution. Such applications are found in sensors, displays, printed electronics and electrodes.

UK collaboration seeks to develop graphene-based ultra-barrier materials for displays and electronics

Oct 08, 2015

CPI logo imageThe Centre of Process Innovation (CPI) has announced that it will be part of a UK-based collaboration to develop the next generation of graphene-based ultra-barrier materials for flexible transparent plastic electronic based displays. The materials on which this work focuses on are required for the next generation of smartphones, tablets and wearable electronics and the twelve month project titled ‘Gravia’ will investigate the feasibility of producing graphene-based barrier films for next generation flexible OLED lighting and display products. 

The project combines the skills from each of the partners (University of Cambridge, FlexEnable Ltd, the National Physical Laboratory and the Centre for Process Innovation) and expects to deliver a feasible material and process system. It builds upon significant existing investments by InnovateUK and the EPSRC in this area. The resulting ultra-barrier material can be potentially used in a wide range of novel applications by the lead business partner, FlexEnable.