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Keywords:

  • charge transport;
  • conducting polymers;
  • organic electronics;
  • photovoltaic devices
Thumbnail image of graphical abstract

Charge transport measurements reveal non-Langevin recombination for KP115:PCBM organic photovoltaic devices. This rare but highly advantageous behaviour allows a long charge carrier drift length and thus devices with thick active layers retain a high fill factor. However, no clear correlation with morphology was found, indicating that the origin of non-Langevin recombination may be more complex than previously thought.