Sep 19, 2010
American Institute of Physics reveals more cost-efficient selenium photovoltaic cells
Posted by Rosalind Sanders in categories: business, sustainability
Did you know that many researchers would like to discover light-catching components in order to convert more of the sun’s power into carbon-free electric power?
A new study reported in the journal Applied Physics Letters in August this year (published by the American Institute of Physics), explains how solar energy could potentially be collected by using oxide materials that have the element selenium. A team at the Lawrence Berkeley National Laboratory in Berkeley, California, embedded selenium in zinc oxide, a relatively affordable material that could make more efficient use of the sun’s power.
The team noticed that even a relatively small amount of selenium, just 9 percent of the mostly zinc-oxide base, significantly enhanced the material’s efficiency in absorbing light.
The main author of this study, Marie Mayer (a fourth-year University of California, Berkeley doctoral student) affirms that photo-electrochemical water splitting, that means using energy from the sun to cleave water into hydrogen and oxygen gases, could potentially be the most fascinating future application for her labor. Managing this reaction is key to the eventual production of zero-emission hydrogen powered motors, which hypothetically will run only on water and sunlight.