Deep Ultraviolet LEDs: A killer Application for Graphene? (Graphene Europe 2015)

The idea of using graphene as an epitaxial substrate for semiconductor growth as well as a transparent substrate electrode, has the potential to become a disruptive technological platform for building many future semiconductor device systems. For deep ultraviolet (UV) light-emitting diodes (LEDs), in huge need for various sterilization and disinfection purposes, our concept offers a real advantage over today's AlGaN LED thin film technology that are extremely expensive and inefficient. CrayoNano are developing deep UV LEDs based on AlGaN nanowires grown on graphene that potentially can solve these issues as will be discussed further in my talk.

Dr. Helge Weman is a professor in nanoelectronics at the Norwegian University of Science and Technology (NTNU) in Trondheim, Norway. He received his PhD in semiconductor physics in 1988 from Linköping University, Sweden. During his career he has held various positions at UCSB (USA), NTT Optoelectronics Lab (Japan), EPFL (Switzerland), and IBM Res. Lab (Switzerland). Since 2005 Weman is leading a research group at NTNU on III-V semiconductor nanowires and graphene for use in optoelectronic applications. Weman has authored more than 100 refereed journal papers and is the inventor of six patent applications. In June 2012 he co-founded CrayoNano AS, where he is currently the Chief Technology Officer and Member of the Board.

CrayoNano is developing optoelectronic devices based on semiconductor nanowires on graphene. This technology will enable smaller and more efficient optoelectronic devices for high growth markets like white LEDs, displays and solar cells. By using graphene as a combined electrode and substrate for the active nanowires the final devices become extremely thin and flexible that are able to absorb or emit large amounts of light from a small area using less material, making the CrayoNano technology platform the most efficient and cost effective standard for optoelectronic devices