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Keywords:

  • organic semiconductors;
  • photovoltaics;
  • singlet fission;
  • magnetic fields;
  • charge transfer state
Thumbnail image of graphical abstract

Triplet exciton dissociation in singlet exciton fission devices with three classes of acceptors are characterized: fullerenes, perylene diimides, and PbS and PbSe colloidal nanocrystals. Using photocurrent spectroscopy and a magnetic field probe it is found that colloidal PbSe nanocrystals are the most promising acceptors, capable of efficient triplet exciton dissociation and long wavelength absorption.