Superefficient, Cost-Effective Solar Cell Breaks Conversion Records
A tiny solar cell doubles the efficiency of common photovoltaics’ conversion of sunlight to electricity
by capturing the energy from a broader spectrum of light.
David Biello, December 08, 2006
source:
SCIENCE NEWS /Scientific American
http://www.sciam.com/article.cfm?chanID=sa003&articleID=643C3D30-E7F2-99DF-3108C4CB8A197667
SOLAR EFFICIENCY: New solar cells capture more of the energy in sunlight by layering semiconducting material on top of germanium wafers. A tiny chip similar to the solar cells carried by many satellites and other spacecraft today–including the surprisingly long-lived Mars Rovers–has shattered previous records for maximum efficiency in producing electricity from sunlight. “This is the photovoltaic equivalent of the four-minute mile,” affirms Larry Kazmerski, director of the Department of Energy’s National Center for Photovoltaics in Colorado. “This is a disruptive technology that eventually could provide us, at least in the Southwest, with cost-competitive electricity fairly quickly.”