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Space debris, more efficient LEDs, and thinner, cheaper solar cells
Date:10/25/2011

s/Releases/10.2011/Renewable-Energy-the-Environment-Congress-Presentation-Highlights.aspx#4">summary.

5. Novel LED Design May Boost Efficiencies

Light-emitting diodes (LEDs) are vastly more efficient than incandescent light bulbs and even compact fluorescent bulbs, but they still have design constraints that limit their potential. Researchers at the National Institute of Advanced Industrial Science and Technology (AIST) in Japan has used a new ridge-shaped design that is 10-16 times more efficient than the current flat design. Read full summary.

6. 'Inverted Pyramid' Design Makes Thinner Wafers, Cheaper Solar Cells

The battle between solar power and fossil fuels can be fought on many fronts, but a big one is cost. Researchers at MIT will discuss their newly designed prototype silicon solar cell that promises to be just as efficient as a standard silicon cell, but that uses much less material, making it theoretically cheaper to produce. Read full summary.

7. 'Power Droop' Challenges of LEDs for High-power Lighting

The United States is currently in a transition from old and familiar incandescent light bulbs to vastly more efficient solid-state LEDs, or light emitting diodes. There remain, however, formidable challenges facing LED technologies, particularly when trying to use them for high-power lighting applications. One of the major hurdles is the so-called "efficiency droop" that occurs when attempting to ramp up LEDs to high current densities. Researchers from Rensselaer Polytechnic Institute in New York will discuss the origin of this droop as well as ways to reduce it. Full presentation '/>"/>

Contact: Angela Stark
astark@osa.org
202-416-1443
Optical Society of America
Source:Eurekalert

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