September 8, 2008
Light trap boosts solar cells
Turn direct sunlight into diffuse light
in a solar cell and you boost the intensity of the light, which increases
the cell's efficiency. A solar concentrator that turns sunlight to
diffuse light traps more than 90% of the light that hits it.
Diffuse light is more intense because the light bounces around
inside the device, which means less of the light reflects away.
The light trap works with spectrum splitting solar cells,
which are optimized to convert specific parts of the solar spectrum.
Spectrum splitting solar cells are more efficient than single solar
cells that work across the whole solar spectrum.
a New Approach to Spectrum Splitting
Solar Energy Materials and Solar Cells, published online August
Institute for Solar Energy Systems
Related stories and briefs:
generates electricity -- another spectrum splitting technique
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September 8/15, 2008
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