Breakthrough in efficiency of organic or flexible solar cells
Traditional silicon solar panels are heavy and bulky and convert about 20 percent of the light that hits them to useful electrical power. For years, researchers have worked to create flexible, or "conformal," organic solar cells that can be wrapped around surfaces, rolled up or even painted onto structures, but the best scientists have been able to do is about 3 percent efficiency, until now.
Researchers at Wake Forest, with the help of researchers at New Mexico State University, have achieved an efficiency rate for organic solar cells of almost 6 percent. In order to be considered a viable technology, the solar cells must be able to convert about 10 percent of the energy in sunlight to electricity. Wake Forest researchers hope to reach 10 percent by October 2006, said David Carroll, director of the nanotechnology center at Wake Forest.
A test system at Wake Forest's nanotechnology center was used to simulate the sun, Carroll said, and the simulated spectrum was precisely measured and shot onto the organic solar cell, which appeared as a thin coat of paint. Devices at the center have registered almost 6 percent efficiency.
This breakthrough was announced in October at the Santa Fe Workshop on Nanoengineered Materials and Macro-Molecular Technologies, which was sponsored by Wake Forest's nanotechnology center.
I first saw this at earthsentinel but the story appears over at physorg.
posted by Unknown @ 7:58 AM
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