Plasmonic concentrators for enhanced light absorption in ultrathin film organic photovoltaics

  title={Plasmonic concentrators for enhanced light absorption in ultrathin film organic photovoltaics},
  author={Aminy Ostfeld and Domenico Pacifici},
  journal={Applied Physics Letters},
We report on experimental absorption enhancement in 24 and 150-nm-thick bulk heterojunctions of the conducting polymer poly(3-hexylthiophene) and the fullerene (6,6)-phenyl C61 butyric acid methyl ester. By using periodic and quasiperiodic hole arrays as nanoengineered plasmonic concentrators milled in a silver film, a spectrally broad, omnidirectional, and polarization-insensitive absorption enhancement is observed over that of a reference layer deposited on a flat film. As the result of… 

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