Researchers at Stanford University have successfully developed a brand new concept of OLEDs with a few nanometer of graphene as transparent conductor. This paved the way for inexpensive mass production of OLEDs on large-area low-cost flexible plastic substrate, which could be rolled up like wallpaper and virtually applied to anywhere you want. The researchers say that Graphene has the potential to be transparent, high-performance, highly conductive and cheaper by several orders of magnitude than current ITO based solutions.
Traditionally, indium tin oxide (ITO) is used in OLEDs, but indium is rare, expensive and difficult to recycle. Scientists have been actively searching for an alternative candidate.