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Russel B. Ross, Claudia M. Cardona, Francis B. Swain, Dirk M. Guldi, Shankara G. Sankaranarayanan, Edward Van Keuren, Brian C. Holloway and Martin Drees Tuning Conversion Efficiency in Metallo Endohedral Fullerene-Based Organic Photovoltaic Devices Advanced Functional Materials 19

Version of Record online: 28 MAY 2009 | DOI: 10.1002/adfm.200900214

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The use of 1-(3-hexoxycarbonyl)propyl-1-phenyl-[6,6]-Lu3N@C81, Lu3N@C80–PCBH leads to significant improvements in the open circuit voltage of poly(3-hexylthiophene), P3HT, based OPV devices. This open circuit voltage enhancement is due to an improved molecular orbital offset between fullerene acceptor and polymer donor. Through properly matching the film processing and the donor to acceptor ratio, P3HT/Lu3N@C80–PCBH devices with power conversion efficiency greater than 4% are demonstrated.

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