Ascent Solar Wins High Efficiency Solar Cell Program

Business Wire, May 9, 2007

LITTLETON, Colo. -- Ascent Solar Technologies, Inc. (NASDAQ:ASTI) (BSX:AKC) today announced that it has been selected by the U.S. Air Force to develop an innovative flexible thin film tandem solar cell with the goal of demonstrating thin film photovoltaic efficiencies of 20%.

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.

Ascent Solar Vice President and Chief Technology Officer Dr. Joseph Armstrong stated, "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. 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."

About Ascent Solar Technologies:

Ascent Solar Technologies, Inc. is a developer of state-of-the-art, thin-film photovoltaic modules and is located in Littleton, Colorado. Please visit our website for additional information at www.ascentsolar.com.

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