Saturday, July 30, 2011

Sun-free photovoltaics by MIT

Materials engineered to give off precisely tuned wavelengths of light when heated are key to new high-efficiency generating system. A new photovoltaic energy-conversion system developed at MIT 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.

Source: MIT
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