December 20, 2002
Quantum Dot LEDs Take Big Step Forward In Brightness

Brighter screens and less power.

Researchers have produced an organic light-emitting diode (LED) that is about 25 times more efficient than the best quantum-dot LEDs to date. The structure contains a single layer of cadmium-selenium quantum dots sandwiched between two organic thin films. Seth Coe and colleagues at the Massachusetts Institute of Technology believe that their approach could be used to fabricate other hybrid organic-inorganic devices (S Coe et al. 2002 Nature 420 800).

In a separate story about the race of many companies to bring organic LED products to market Nobel Laureate Alan Heeger sees organic LEDs revolutionizing light fixture technology.

Heeger, whose discoveries in polymer conductivity earned him and two colleagues a Nobel prize in 2000, said the innovations in lighting could be more dramatic than those in consumer electronics.

OLEDs, coupled with mature inorganic LED technology that already brightens traffic signals and auto taillights, could replace incandescent and fluorescent light bulbs with wallpaper that changes lighting patterns and colors, sheets of radiant film that could be cut to size or light cords that accent walls, handrails or steps, Heeger said.

No need for light bulbs. Though I suppose if some of your wallpaper stopped glowing you might need to re-wallpaper part of a wall to get it glowing again.

Share |      Randall Parker, 2002 December 20 02:30 AM  Materials Advances


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