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Lofty Thought of the Day
- Category: Science & Technology
ScienceDaily (Feb. 6, 2010) — With the use of the new super material graphene, Swedish and American researchers have succeeded in producing a new type of lighting component. It is inexpensive to produce and can be fully recycled.
The invention, which paves the way for glowing wallpaper made entirely of plastic, for example, is published in the scientific journal ACS Nano by scientists at Linköping University and Umeå University, in Sweden, and Rutgers, The State University of New Jersey.
Ultra-thin and electricity-saving organic light diodes, so-called OLEDs, have recently been introduced commercially in mobile phones, cameras, and super-thin TVs. An OLED consists of a light-generating layer of plastic placed between two electrodes, one of which must be transparent. Today's OLEDs have two drawbacks -- they are relatively expensive to produce, and the transparent electrode consists of the metal alloy indium tin oxide. The latter presents a problem because indium is both rare and expensive and moreover is complicated to recycle. Now researchers at Linköping and Umeå universities, working with American colleagues, are presenting an alternative to OLEDs, an organic light-emitting electrochemical cell (LEC). It is inexpensive to produce, and the transparent electrode is made of the carbon material graphene.
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