Ultra-thin and low-power organic light emitting diodes, OLED, are found in mobile telephones, cameras and small TV sets. Today, OLED are relatively expensive to make. Researchers at Umeå and Linköping Universities and American colleagues are now presenting an alternative: an organic light emitting cell (LEC) where the transparent electrode is made from the graphitic carbon material graphene. All the parts can be produced from solution, and LEC are therefore made in a printing press.
- This opens the way for cheap production of completely plastic-based lighting and display components in the form of large flexible sheets that can be rolled up or put up on walls or ceilings as wallpaper, says Professor Ludvig Edman of Umeå University.