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Solid-State Lighting
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From page 2... ... Liu Qi looked back over his shoulder at the "Water Cube," China's national aquatic center, standing a few hundred yards from the stadium. The Water Cube gave off an iridescent blue and green glow. Read the entire page →
From page 3... ... As researchers made progress, LED technology rapidly advanced and began to conquer incumbent technologies such as those for traffic lights. Red, yellow, and green LEDs used as little as 1/10 the electricity of the existing traffic light incandescent bulbs, saving roughly $1,000 of electricity per intersection each year. Read the entire page →
From page 4... ... , how to reduce defects in the semiconductor material (to reduce parasitic channels in which electrons lose energy without emitting light) , and how to "extract" more light from the LED once the light is created inside it -- that is, to reduce the amount of light that is trapped and re-absorbed in the LED.6 While the best products currently on the market have energy efficiencies of around 25 percent, cool white LEDs have already demonstrated 50 percent in the lab.7 Ultimately, the industry believes it may achieve energy efficiencies of 70-80 percent, although much basic research will still be needed to reach those levels.8 According to a recent study for DOE by Navigant,9 by the year 2030, LEDs are expected to reduce the electricity used for U.S. Read the entire page →
From page 5... ... Researchers are beginning to look at how to incorporate micromechanical optical components electrically activated miniature -- mirrors and lenses -- into the LED chip surface. This could allow beams of light from a lamp to be focused from a wide area to a spotlight. Read the entire page →

From page 2...

... Liu Qi looked back over his shoulder at the "Water Cube," China's national aquatic center, standing a few hundred yards from the stadium. The Water Cube gave off an iridescent blue and green glow.

Read the entire page →

From page 3...

... As researchers made progress, LED technology rapidly advanced and began to conquer incumbent technologies such as those for traffic lights. Red, yellow, and green LEDs used as little as 1/10 the electricity of the existing traffic light incandescent bulbs, saving roughly $1,000 of electricity per intersection each year.

Read the entire page →

From page 4...

... , how to reduce defects in the semiconductor material (to reduce parasitic channels in which electrons lose energy without emitting light) , and how to "extract" more light from the LED once the light is created inside it -- that is, to reduce the amount of light that is trapped and re-absorbed in the LED.6 While the best products currently on the market have energy efficiencies of around 25 percent, cool white LEDs have already demonstrated 50 percent in the lab.7 Ultimately, the industry believes it may achieve energy efficiencies of 70-80 percent, although much basic research will still be needed to reach those levels.8 According to a recent study for DOE by Navigant,9 by the year 2030, LEDs are expected to reduce the electricity used for U.S.

Read the entire page →

From page 5...

... Researchers are beginning to look at how to incorporate micromechanical optical components electrically activated miniature -- mirrors and lenses -- into the LED chip surface. This could allow beams of light from a lamp to be focused from a wide area to a spotlight.

Read the entire page →

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Solid-State Lighting Pages 2-5

Solid-State Lighting
Pages 2-5