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Environment & Energy
Related: About this forumCause of LED Efficiency Droop Finally Revealed
http://engineering.ucsb.edu/news/699[font face=Serif]April 22, 2013
[font size=5]Cause of LED Efficiency Droop Finally Revealed[/font]
NEWS RELEASE
[font size=3](Santa Barbara, Calif. ) Researchers at University of California, Santa Barbara, in collaboration with colleagues at the École Polytechnique in France, have conclusively identified Auger recombination as the mechanism that causes light emitting diodes (LEDs) to be less efficient at high drive currents.
Until now, scientists had only theorized the cause behind the phenomenon known as LED droopa mysterious drop in the light produced when a higher current is applied. The cost per lumen of LEDs has held the technology back as a viable replacement for incandescent bulbs for all-purpose commercial and residential lighting.
This could all change now that the cause of LED efficiency droop has been explained, according to researchers James Speck and Claude Weisbuch of the Center for Energy Efficient Materials at UCSB, an Energy Frontier Research Center sponsored by the U.S. Department of Energy.
Knowledge gained from this study is expected to result in new ways to design LEDs that will have significantly higher light emission efficiencies. LEDs have enormous potential for providing long-lived high quality efficient sources of lighting for residential and commercial applications. The U.S. Department of Energy recently estimated that the widespread replacement of incandescent and fluorescent lights by LEDs in the U.S. could save electricity equal to the total output of fifty 1GW power plants.
[/font][/font]
http://arxiv.org/abs/1304.5469
[font size=5]Cause of LED Efficiency Droop Finally Revealed[/font]
NEWS RELEASE
[font size=3](Santa Barbara, Calif. ) Researchers at University of California, Santa Barbara, in collaboration with colleagues at the École Polytechnique in France, have conclusively identified Auger recombination as the mechanism that causes light emitting diodes (LEDs) to be less efficient at high drive currents.
Until now, scientists had only theorized the cause behind the phenomenon known as LED droopa mysterious drop in the light produced when a higher current is applied. The cost per lumen of LEDs has held the technology back as a viable replacement for incandescent bulbs for all-purpose commercial and residential lighting.
This could all change now that the cause of LED efficiency droop has been explained, according to researchers James Speck and Claude Weisbuch of the Center for Energy Efficient Materials at UCSB, an Energy Frontier Research Center sponsored by the U.S. Department of Energy.
Knowledge gained from this study is expected to result in new ways to design LEDs that will have significantly higher light emission efficiencies. LEDs have enormous potential for providing long-lived high quality efficient sources of lighting for residential and commercial applications. The U.S. Department of Energy recently estimated that the widespread replacement of incandescent and fluorescent lights by LEDs in the U.S. could save electricity equal to the total output of fifty 1GW power plants.
[/font][/font]
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Cause of LED Efficiency Droop Finally Revealed (Original Post)
OKIsItJustMe
Apr 2013
OP
Buzz Clik
(38,437 posts)1. I assumed it was bras.
http://www.livescience.com/28664-bras-make-breasts-sag.html
But, upon reading the article, it's a different kind of droop.
Who knew?
But, upon reading the article, it's a different kind of droop.
Who knew?
djean111
(14,255 posts)2. That is very good news!
Right now I have been buying incandescent bulbs, and being scrupulous about turning them off when not needed. I am not going to buy the mercury things at all. I buy LED when they are on sale.
Gman
(24,780 posts)3. Republicans will still complain about their right
To use technology that is over 100 years old despite the common good.