Ascent Solar working toward 20% thin film photovoltaic efficiency
by Ann Steffora Mutschler, Senior Editor
Source:
Electronic News, May 9, 2007
http://www.edn.com/index.asp?layout=article&articleid=CA6440595
Littleton, Colo.-based thin-film photovoltaic module maker Ascent Solar Technologies Inc. said today it has been selected by the U.S. Air Force to develop a flexible thin film tandem solar cell with the goal of demonstrating thin film photovoltaic efficiencies of 20 percent, which is higher than other technologies manufactured so far. According to the company, tandem solar cells are a combination of two cells stacked atop one another, with the top and bottom cells gathering energy from separate parts of the solar spectrum.
Tandem cells require two solar cells that not only have the desired electrical and optical properties, but must also share compatible manufacturing processes. The program will be performed under a phase one Small Business Innovative Research contract.
Dr. Joseph Armstrong, VP and CTO of Ascent noted in a statement, “This important Air Force program builds upon significant work already performed by Ascent Solar personnel in the area of wide bandgap thin-film photovoltaic technology.”
“In particular, this program will demonstrate the ability to make solar cells using a new material system that has the potential to serve as the top cell of a new and innovative tandem solar cell configuration on which Ascent Solar has been working,” he continued.
“It’s like putting two efficient technologies in a hybrid car, each with its own strengths, but performing better together than either one individually. We are delighted that the U.S. Air Force selected Ascent Solar to work with it in this exciting and promising technology area,” Armstrong added.