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Keywords:

  • Conducting polymers;
  • Conjugated polymers;
  • Photovoltaic devices;
  • Solar cells, heterojunction
Thumbnail image of graphical abstract

For bulk-heterojunction photovoltaic cells fabricated from conjugated polymers and a fullerene derivative, the relation between the open-circuit voltage (Voc) and the oxidation potential for different conjugated polymers is studied. A linear relation between Voc and the oxidation potential is found (see figure). Based on this relation, the energy-conversion efficiency of a bulk-heterojunction solar cell is derived as a function of the bandgap and the energy levels of the conjugated polymer.