Manufacturing Industry
World record moves lower-cost solar energy a step closer.(Brief Article)
Design News, July, 1999 by Chamberlain, Gary
Researchers at the National Renewable Energy Laboratory (NREL) (Golden, CO) have taken another step toward reduced costs and increased competitiveness for solar energy. They set a new world record for thin-film solar cell efficiency. The measurement of 18.8% efficiency for the copper indium gallium diselenide (CIS) cell topped the previous record, also set at NREL, by more than 1%.
A solar cell's efficiency is measured by the percentage of available sunlight converted by the photovoltaic cell into electricity. Thin-film photovoltaics use very thin layers of semiconductor material applied to a low-cost backing, such as glass or flexible plastic or stainless steel. CIS thin-film technology, in particular, has demonstrated outdoor reliability and stable conversion...
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