Tuesday, February 03, 2009
Thin-film solar cells can use inexpensive, low-temperature processing to stack amorphous silicon and germanium photovoltaic layers atop a reflective foil backing. By using multiple layers with semiconductor junctions tuned to different wavelengths of light, thin-film module makers claim that their solar cells are not only cheaper, but could outperform expensive crystalline solar cells in many climates. Advanced Green Technologies (AGT, Ft. Lauderdale, Fla.) claims its thin-film solar cell modules trade higher output on sunny days for better performance on cloudy days. AGT said its thin-film cells outperform glass encapsulated monocrystalline solar cells where sunny days are the exception. The reason, the company said, is that they continue to produce electricity when its cloudy.
Posted by R. Colin Johnson at 7:54 AM