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Graphene in Lighting - Posted at 11:25 AM on Feb. 9, 2010 by ausetute
OLEDs, organic light diodes, used in mobile phones, cameras and very thin TVs, are composed of a light generating layer of plastic placed between 2 electrodes, one of which must be transparent. They are quite expensive to produce and the transparent electrode used is the metal alloy indium tin oxide. Indium is rare and and the electrode is difficult to recycle.

Scientists have just discovered that graphene can be used as the transparent electrode creating an organic light-emitting electrochemical cell, LEC. Graphene, composed of a single layer of carbon atoms, has high electrical conductivity making it a suitable electrode, is virtually transparent, and can be produced in solution as graphene oxide, and it can be recycled. Since all the LEC components can be produced in solution, scientists think it should be possible to create illuminated displays that can be rolled up or applied as a wallpaper or on ceilings.

The future is looking brighter :)

Piotr Matyba, Hisato Yamaguchi, Goki Eda, Manish Chhowalla, Ludvig Edman, and Nathaniel D. Robinson. Graphene and Mobile Ions: The Key to All-Plastic, Solution-Processed Light-Emitting Devices. ACS Nano, 2010; 100204180201054 DOI: 10.1021/nn9018569
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