Norwegian researchers develop UV LEDs built on graphene

Researchers at the Norwegian University of Science and Technology's (NTNU) Department of Electronic Systems, led by professors Helge Weman and Bjørn-Ove Fimland, have succeeded in building UV LEDs by growing AlGaN nanowires on graphene. "We've shown that it's possible, which is really exciting," says PhD candidate Ida Marie Høiaas, who has been working on the project with PhD candidate Andreas Liudi Mulyo.

A layer of graphene placed on glass forms the substrate for the researchers' new diode that generates UV light. Researchers then grew nanowires of AlGaN on the graphene lattice, using molecular beam epitaxy. This was conducted in Japan, where the NTNU research team collaborates with Katsumi Kishino at Sophia University in Tokyo.

The Graphene Light project demonstrates its laser graphene foam lighting device

In May 2017 we reported on a new project at the Institute of Low Temperature and Structure Research (Wroclaw, Poland) that developed a new efficient white light source that uses graphene foam excitated by a continuous-wave laser.

The project is still in progress, and the researchers demonstrated the technology at IDTechEx Graphene & 2D Materials Europe 2019 earlier this month, as can be seen in our video above.

Graphene-Info's Batteries, Graphene Oxide, Lighting, Displays and Graphene Investments Market Reports updated to April 2019

Today we published new versions of all our graphene market reports. Graphene-Info provides comprehensive niche graphene market reports, and our reports cover everything you need to know about these niche markets. The reports are now updated to April 2019.

Graphene batteries market report 3D cover

The Graphene Batteries Market Report:

  • The advantages using graphene batteries
  • The different ways graphene can be used in batteries
  • Various types of graphene materials
  • What's on the market today
  • Detailed specifications of some graphene-enhanced anode material
  • Personal contact details into most graphene developers

The report package provides a good introduction to the graphene battery - present and future. It includes a list of all graphene companies involved with batteries and gives detailed specifications of some graphene-enhanced anode materials and contact details into most graphene developers. Read more here!

Graphene serves as both substrate and transparent electrode in ultraviolet LEDs

Researchers at the Norwegian University of Science and Technology (NTNU) in Norway, Sophia University in Japan and SINTEF Industry, Norway have demonstrated the use of graphene as both a growth substrate and transparent conductive electrode for an ultraviolet light-emitting diode.

Graphene serves as both substrate and transparent electrode in ultraviolet LEDs imageTop- and bird-view SEM images of nanocolumns grown on DLG transferred onto amorphous silica glass

The team focused on a flip-chip configuration, where GaN/AlGaN nanocolumns were grown as the light-emitting structure using plasma-assisted molecular beam epitaxy. Although the sheet resistance increased after nanocolumn growth compared with pristine double-layer graphene, the experiments showed that the double-layer graphene functioned adequately as an electrode. The GaN/AlGaN nanocolumns were found to exhibit a high crystal quality with no observable defects or stacking faults.

Graphene Lighting launches new plant and receives orders

Manchester-based Graphene Lighting has announced the commencing of its new wholly owned mass production facility in Shenzen, China.

JTX graphene bulbs, Hongkong lighting fair 2017 photo

The Company shared that its previous plans of merging with JTX ended in October 2017, and it will focus its efforts towards sales and marketing using its own and partner capabilities. Graphene Lighting also said that the manufacturing facility has been in pilot production for the last 6 months and has commenced product shipment over the last four weeks.

Versarien - Think you know graphene? Think again! Versarien - Think you know graphene? Think again!