Patent 7825326 was granted and assigned to Konarka Technologies on November, 2010 by the United States Patent and Trademark Office.
This disclosure relates to a photovoltaic cell that includes a first electrode, a second electrode, and an active layer disposed between the first and second electrodes. The active layer includes two different fullerenes. The weight ratio of the first fullerene to the second fullerene is at least about 1:20.