Impeding the charge recombination through modifying the electron–phonon coupling in organic charge transfer complexes

The third component doping is considered as an effective method to improve the performance of organic photovoltaics and to understand the role of the third component on the charge dissociation in ternary complexes. In this work, through changing the doping ratio of the third component, the electron–phonon (e–p) coupling coefficient is tuned, where the e–p coupling dependence of charge recombination is studied in ternary charge transfer complexes. Modifying the e–p coupling by an optimized doping ratio of the third component will effectively suppress charge recombination in ternary charge transfer complexes. Furthermore, the e–p coupling coefficient is tightly dependent on the external light intensity and temperature. Overall, the insights gained from this study may be of assistance to provide further information for improvement in the organic photovoltaics.