ScienceDaily: Top Technology News |
| Posted: 30 Jul 2011 03:02 PM PDT A new photovoltaic energy-conversion system can be powered solely by heat, generating electricity with no sunlight at all. While the principle involved is not new, a novel way of engineering the surface of a material to convert heat into precisely tuned wavelengths of light -- selected to match the wavelengths that photovoltaic cells can best convert to electricity -- makes the new system much more efficient than previous versions.  |
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