Fall 2009
- Designer Duo Create a Dress With 24,000 LEDs (link)
Wired.com
- Green light from lasers ; Cree expands LED capacity (pdf)
Semiconductor Today
- A Road Map to New Lighting (link)
Seeking Alpha, By Michael Kanellos
Light bulbs remain the last vestige of the vacuum-tube era. Tube TVs and stereos are gone. Computers went digital in the 1950s. Other amusing light anniversaries: Georges Claude invented the neon light in 1911 while the fluorescent was invented in 1927 in Germany. The compact fluorescent, invented by former GE engineer Ed Hammer, came to light in 1976. GE loved it – many thought it would be impossible – but initially balked at building it because of the cost of a factory. (White light LEDs came around in the early 1990s courtesy of Shuji Nakamura.)
- A 360-Degree Virtual Reality Chamber Brings Researchers Face to Face with Their Data (link)
Scientific American
Chris Van de Walle, a UCSB Materials Professor, has been studying conductivity in a class of material called transparent conductors, used in solar cells to let in as much light as possible.
Summer 2009
- New Angle on Approach to Green Lasers (link)
Semiconductor Today
Shuji Nakamura's group at UCSB has reported on a blue-green laser diode.
- University of California Scientist; Leading Edge of Energy-Efficient Lighting and Environmental Management (link)
Pacific Coast Business Times
May 2009
- Green Promise Seen in Switch to LED Lighting (link)
By Elisabeth Rosenthal and Felicty Barringer, The New York Times
Light emitting diodes (LEDs) could decrease carbon dioxide emissions by up to 50% in just over 20 years.
- UCSB Simulations Support Auger Droop Theory
compoundsemiconductor.net (link)
First principle calculations expose Auger recombination as the predominant cause of LED droop and the green gap, but offer few solutions. The calculations by UCSB's Kris Delaney, Patrick Rinke and Chris Van de Walle show that droop in visible LEDs is caused by interband Auger recombination, a form of non-radiative recombination that peaks at 2.5 eV.
- Atom Probe Aids UCSB's Cluster Search
compoundsemiconductor.net
A new analytical tool just placed into service at UCSB is set to solve a wide range of problems in GaN-related electronic materials. That's according to Jim Speck, a professor in UCSB's materials department and a specialist in wide-bandgap semiconductors.
- DenBaars to Speak at the Santa Barbara Summit on Energy Efficiency (link)
The inaugural Santa Barbara Summit on Energy Efficiency will bring together global influencers and stakeholders in energy efficiency technologies, commercialization, and policy for two days of in-depth discussions and the latest industry updates in the fast-moving sector.
Want to listen to the Podcast?
Steve DenBaars interview with Lance Orozco from KCLU
http://www.kclu.org/news/local/story.php?story_id=444
Energy Efficiency Emphasized at UC Santa Barbara Summit
http://venturacountystar.com/news/2009/may/21/no-headline---na8fcefficency21/
April 2009
- Green Lasers: The Next Innovation in Chip-Based Beams (pdf)
Shuji Nakamura and Michael Riordan, Scientific American
Semiconductors can generate laser light in all colors except one. But new techniques for growing laser diodes could soon make brilliant full-spectrum displays a reality.
- Prospects for LED Lighting (link)
Siddha Pimputkar, James S. Speck, Steven P. DenBaars, & Shuji Nakamura
More than one-fifth of US electricity is used to power artificial lighting. Light-emitting diodes based on group III/nitride semiconductors are bringing about a revolution in energy-efficient lighting. It is anticipated that further advances in white LEDs will revolutionize the lighting industry and lead us into a more energy-efficient and bright future.
March 2009
- [Lighting Fair] Key Figures Discuss Future of LED, OLED Lights (article)
- LED Lighting Market To Grow At 28% To $5 Billion by 2012 (article)
In recent years, LED technology has made impressive performance gains, which in turn have improved the efficiency of LED lighting fixtures. During 2008-2012, white LED fixtures will make gains in market share as the best commercially available high-performance white LEDs.
- National Geographic Article on Energy Conservation (full article)
Changing Bulbs (follow up article)
The Light-emitting diode (LED) looks like the eco-bulb of the future. With no filament, just a microchip, it uses significantly less energy than an incandescent.
February 2009
- UC Profits From Patent Technology
Inventive Investments Benefit Budget, Industry (article)
Despite the profit generated by such technologies, Sherylle Mills Englander, Director of the UCSB Office of Technology & Industry Alliances, said the reason for patenting UCSB inventions is not simply for the financial benefits, but rather to provide helpful resources for the public.
"Our biggest potential impact in the next few years is our Solid State Lighting & Energy Center," Englander said. "Their predominant focus is on LEDs. They use ten percent of the energy and they never burn out. Imagine if you could replace every stoplight in the community with LEDs how much energy you would save."
- Umesh Mishra, Newly Elected Member of The National Academy of Engineering (NAE)
Election to the National Academy of Engineering is among the highest professional distinctions accorded to an engineer. Academy membership honors those who have made outstanding contributions to "engineering research, practice, or education, including, where appropriate, significant contributions to the engineering literature," and to the "pioneering of new and developing fields of technology, making major advancements in traditional fields of engineering, or developing/implementing innovative approaches to engineering education."
UMESH K. MISHRA, professor, department of electrical and computer engineering, University of California, Santa Barbara. For contributions to development of gallium-nitride electronics and other high-speed, high-power semiconductor electronic devices.
http://www.semiconductor-today.com/news_items/2009/FEB/UCSB_090209.htm
http://www.eurekalert.org/pub_releases/2009-02/naos-nao020609.php
- LED's Good Housekeeping Seal (article)
By Eric A. Taub, New York Times: Technology
The D.O.E. is bringing LED lighting products into its Energy Star Program.
- Residential LED Lighting for Consumers (article)
ENERGY STAR qualified LED lighting is a natural fit for cutting-edge renovation, new construction projects, or do-it-yourself upgrades. ENERGY STAR qualified residential LED lighting uses at least 75% less energy, lasts 25 times longer than incandescent lighting and provides optimal light color.
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