30 Apr 2012:
Boosts Output of Solar Panels
By adding microscopic folds onto the surface of photovoltaic materials, a design variation borrowed from a
Folded solar cell
natural leaf, researchers say they have been able to boost the solar output of flexible plastic solar cells by 47 percent
. According to the scientists, who published their findings in the journal Nature Photonics
, the folds acted as a sort of “wave guide,” channeling light waves and increasing the material’s exposure to light. “I expected that it would increase the photocurrent because the folded surface is quite similar to the morphology of leaves, a natural system with high light harvesting efficiency,” said Jong Bok Kim, a researcher from Princeton University and lead author of the study. “However, when I actually constructed solar cells on top of the folded surface, its effect was better than my expectations.” And since the researchers used relatively inexpensive plastic materials — as opposed to the more expensive silicon commonly used in panels — they hope their findings will help lead to a cheaper and efficient source of solar power.
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Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm. Watch the video.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.
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