United Press International
09-19-06
Advances in solar cell science announced
AMES, Iowa, Sept. 19 (UPI) -- U.S. scientists say they have made discoveries in
materials science and plasma chemistry that might boost the performance of
solar cells.
Professor Vikram Dalal, director of Iowa State University's Microelectronics
Research Center, is working with PowerFilm Inc., an Ames, Iowa, company that
manufactures thin, flexible solar panels, to improve the performance and stability
of the company's solar cells.
A challenge facing solar cell manufacturers is the fact that most cells are
manufactured with crystalline silicon, the same material used to make computer
semiconductors. Because computer parts have more value than solar cells, Dalal
said there's a shortage of silicon for solar cells.
There is, however, a way to manufacture solar cells using non-crystalline silicon
wafers, although they only produce about half the electricity as crystalline silicon.
And their performance drops by about another 20 percent over time.
But Dalal says Iowa State researchers have devised a way to improve the
performance of the cells by about 35 percent and eliminate about 15 percent of
the drop in performance.
The discoveries are expected to result in several patents, Dalal said.