Article: Ohio Inventor Develops Two-Junction Solar Cell

ALEXANDRIA, Va., Dec. 13 -- Geoffrey A. Landis of Berea, Ohio, has developed a silicon tandem solar cell with extended temperature range.

According to the U.S. Patent & Trademark Office: "A two-junction solar cell has a bottom solar cell junction of crystalline silicon, and a top solar cell junction of gallium phosphide. A three (or more) junction solar cell has bottom solar cell junctions of silicon, and a top solar cell junction of gallium phosphide. The resulting solar cells exhibit improved extended temperature operation."

The inventor was issued U.S. Patent No. 7,148,417 on Dec. 12.

The patent has been assigned to U.S. National Aeronautics & Space Administration, ...

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