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

Oct 08, 2015

The 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.

IDTechEx's analyst explains his views on the graphene market

Sep 04, 2015

Dr Khasha Ghaffarzadeh, IDTechExA few weeks ago we reported on a new IDTechEx market report, in which they predict that the graphene market will reach nearly $200 million by 2026, with the estimation that the largest sectors will be composites, energy applications and graphene coatings.

We were very interested in learning more, and Dr Khasha Ghaffarzadeh, IDTechEx's head of consulting was kind enough to answer a few questions and explain the company's view on the graphene market.

Q: IDTechEx has been following graphene for a long time with dedicated events and reports. Why is this new material interesting for IDTechEx?

We have a long track record of analyzing emerging advanced materials such as quantum dots, CNTs, Ag nanostructures, silicon nanostructures, OLED materials, etc. We were however pulled into the world of graphene by our clients’ questions. Once in, we soon realized that there is a big synergy between graphene and our events. in fact, our events on supercapacitors and printed electronics were the right near-term addressable market for graphene, and that is why we managed to rapidly build up the largest business-focused event on graphene. Our events on graphene are held in the USA and Europe each year – see

KAIST scientists create novel graphene QD LEDs

Jun 16, 2015

Researchers from Korea Advanced Institute of Science and Technology (KAIST) have fabricated light-emitting diodes (LEDs) based on graphene quantum dots (GQDs). The researchers made pure GQDs using a cost-effective, scalable and environmentally friendly method that allows direct fabrication of GQDs using water, without surfactants or chemical solvents.

KAIST researchers create GQD LEDs image

The GQDs were used as emitters in organic light-emitting diodes (OLEDs) to identify the quantum dots’ key optical properties. After carefully designing the layer configuration so that electron and hole injection could be balanced, the scientists constructed GQD LEDs exhibiting luminance of 1000 cd/m2, which is considered very high and well over the usual brightness of displays used in smartphones. Because of their thinness, GQDs may even be used to create a foldable paper-like display.

Graphene enables tiny bulb on a chip

Jun 16, 2015

A team of scientists from Columbia, Seoul National University (SNU), and Korea Research Institute of Standards and Science (KRISS) reported the creation of an on-chip visible light source using graphene as a filament. Creating light in small structures on the surface of a chip is crucial for developing fully integrated 'photonic' circuits that do with light what is now done with electric currents in semiconductor integrated circuits. 

Graphene filament used for creating lightbulb on a chip image

The scientists attached small strips of graphene to metal electrodes, suspended the strips above the substrate, and passed a current through the filaments to cause them to heat up. The team refers to this design as 'the world's thinnest light bulb', a type of 'broadband' light emitter that can be integrated into chips and may pave the way towards the realization of atomically thin, flexible, and transparent displays, and graphene-based on-chip optical communications. 

Boron-laced nanographenes show promise for next-gen displays by featuring an intensive blue light

Jun 11, 2015

Scientists at the Goethe University in Germany have developed a new class of organic luminescent materials through the targeted introduction of boron atoms into the molecular structures of graphene. The compound feature an intensive blue fluorescence and are therefore of interest for use in organic light-emitting diodes (OLEDs). 

Boron-laced graphene emit intensive blue light image

A comparison of the new boron-containing nanographenes with an analogous boron-free material verifies the fact that the boron atoms have a great impact on two important properties of an OLED: the fluorescence shifts into the desirable blue spectral range and the capacity to transport electrons is substantially improved. currently, very limited use can be made of boron-containing nanographenes, since most of the exponents are sensitive to air and moisture. The scientists in this study claim that this problem does not occur with their materials, which is important with regard to practical applications. 

Graphenea launches large area monolayer graphene suspended over microcavities

Jun 08, 2015

Graphenea recently introduced large area monolayer graphene suspended over microcavities as a standard catalog product, that can be used for NEMS (Nanoelectromechanical systems) due to its reliance on small vibrating membranes, which are sensitive to tiny forces.

Graphenea's graphene over cavities for NEMS image Image courtesy of Stefan Wagner / Max Lemme, University of Siegen

NEMS are entering mainstream technology through sensors and actuators in platforms as common as inkjet printers, accelerometers, displays, and optical switches. The membranes used in NEMS need to be lightweight and stiff, with a high Young's modulus. As such, graphene is a very promising candidate for applications that require ultrathin membranes with excellent mechanical properties.

Unique process improves graphene's performance as a transparent conductor

Jun 08, 2015

Researchers from the University of Maryland found that intercalating (embedding) sodium ions in a reduced graphene oxide (rGO) network, printed with graphene oxide (GO) ink, can significantly improve its performance as a transparent conductor in displays, solar cells and electronic devices.

The scientists used cost-effective materials and production techniques to receive a highly scalable printed electronics system that produces relatively inexpensive and stable conductors. The team theorizes the increased stability is due to the natural oxidation of sodium along the edges of the printed networks which forms a barrier that prevents ion loss. Networks printed with the ink exhibit up to 79 percent optical transmittance and 311 Ohms per square of sheet resistance.