Manufacturing Industry
Silver-coated solar cells boost energy efficiency.(EMERGING TECHNOLOGY)(Brief article)
Advanced Materials & Processes, July, 2007
A 16-fold enhancement in light absorption in 1.25-micron silicon thin-film solar cells for light with a wavelength of 1050 nm has been reported by researchers at the University of New South Wales, Australia. They have also reported a seven-fold enhancement in light absorption in light wavelengths of 1200 nm.
The UNSW researchers have devised a way to deposit a thin film of silver (about 10 nm thick) onto a solar cell surface and then heat it to 200[degrees]C (390[degrees]F). This breaks the film into 100-nanometer "islands" of silver that boost the cell's light trapping ability, thereby boosting its efficiency. "Most thin-film solar cells are between eight and 10% efficient," says Dr. Kylie Catchpole. "But the new technique could increase efficiency to between...
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