June 14, 2005: Nanotechnology May Boost Electricity From Solar Cells
GOLDEN, Colo. - Researchers at the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL) have shown that nanotechnology may greatly increase the amount of electricity produced by solar cells.
In a paper published in a May issue of the American Chemical Society's Nano Letters journal, an NREL team found that tiny nanocrystals, also known as quantum dots, produce as many as three electrons from one high energy photon of sunlight. When today's photovoltaic solar cells absorb a photon of sunlight, the energy gets converted to at most one electron, and the rest is lost as heat.