EPJ Web of Conferences (Mar 2013)

Exciton and Hole-Transfer Dynamics in Polymer: Fullerene Blends

  • van Loosdrecht P. H. M.,
  • Hummelen J.C.,
  • Pavelyev V.G.,
  • Serbenta A.,
  • Pshenichnikov M.S.

DOI
https://doi.org/10.1051/epjconf/20134104012
Journal volume & issue
Vol. 41
p. 04012

Abstract

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Ultrafast hole transfer dynamics from fullerene derivative to polymer in bulk heterojunction blends are studied with visible-pump - IR-probe spectroscopy. The hole transfer process is found to occur in 50/300 fs next to the interface, while a longer 15-ps time is attributed to exciton diffusion towards interface in PC71BM domains. High polaron generation efficiency in P3HT blends indicates excellent intercalation between the polymer and the fullerene even at highest PC71BM concentration thereby yielding a valuable information on the blend morphology.