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LED Efficiency Puzzle Reportedly Solved

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SANTA BARBARA, Calif., April 21, 2011 — Nitride-based LEDs are efficient, nontoxic and long-lasting, but they are considered impractical for general lighting because of a drop in efficiency when operating at high power. Researchers at the University of California said they have now figured out why. Chris Van de Walle, a professor in the materials department at UCSB, and his colleagues investigated the drop in efficiency, a phenomenon known as “droop,” by performing quantum mechanical calculations. LED droop. (Image: UC Santa Barbara engineering) The researchers said the LED droop can be attributed to...Read full article

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    Published: April 2011
    AmericasAuger recombinationBasic ScienceChris Van de WalleConsumerdroop effectEmmanouil KioupakisGermanyKris DelaneyLight SourcesNitride-based LEDsPatrick Rinkequantum mechanical calculationsResearch & TechnologysemiconductorsUniversity of California Santa BarbaraLEDs

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