Next-Gen LEDs Show Bright Future

Scientists in India are reporting an advance toward discovering a Holy Grail of the illumination industry — a white LED, a light-emitting diode that produces pure white light suitable for interior lighting of homes, offices and other buildings. Their study is in the Sept. 9 issue of ACS' The Journal of Physical Chemistry C. In the report, D. D. Sarma and Angshuman Nag point out that practical versions of these so-called white LEDs would be brighter, longer-lasting and more energy efficient than conventional light sources such as incandescent and fluorescent lamps and could replace them in the future.

However, scientists have faced several difficulties in developing pure white LEDs with all the requirements and desirable properties. Existing versions produce tinted, unstable shades of white light that mar their performance. The researchers report the first success in developing a new LED based on a new phosphor from semiconductor nanocrystals of cadmium sulfide mixed with manganese. It produces a stable shade of white light that remains constant over time and appears superior in overall performance in comparison to previous generations of white LEDs. The scientists now are working to boost its efficiency so that the white LED can be used in everyday applications.

News source: PhysOrg

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11 Comments

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This news just make me think.... Where are all those LCD display using LED? They where supposed to be available no? They are using it in some laptop but that's about it....

Andre said,
You mean OLED and those are different from LED.

No he meant actual LED backlit LCD displays. IIRC Apple offers them in their new notebooks.

I don't know about you guys, but I don't want pure white light in my home. In an office environment it can be okay though. I much prefer yellow light (<6000°K), which is the reason I mostly still use old incandescent bulbs (and rarely over 45W) in my apartment instead of those newfangled low energy flourescent lamps. So much cosier. I do have one of those "daylight lamps" as a bias light behind my monitor though.

Check out the source. We'll be lucky if this:
1). Works as advertised.
2). Sees the light of, heh, itself, in the next 8 years.

already have some led lighting in my house and the rest is compact fluorescent. the leds are nice, but expensive and don't offer nearly as much light. I've been thinking about making a bulb out of a couple cree leds, but that would probably be too bright