Exciton and Hole-Transfer Dynamics in Polymer: Fullerene Blends

Exciton and Hole-Transfer Dynamics in Polymer: Fullerene Blends

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 towa...

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Veröffentlicht in:EPJ Web of conferences 2013-01, Vol.41, p.4012-np
Hauptverfasser: Serbenta, A., Pavelyev, V.G., Hummelen, J.C., van Loosdrecht, P. H. M., Pshenichnikov, M.S.
Format: Artikel
Sprache:eng
Schlagworte:
Derivatives
Diffusion
Dynamic tests
Dynamics
Excitation
Fullerenes
Heterojunctions
Polymer blends
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Zusammenfassung: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 PC sub(71)BM domains. High polaron generation efficiency in P3HT blends indicates excellent intercalation between the polymer and the fullerene even at highest PC sub(71)BM concentration thereby yielding a valuable information on the blend morphology.
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/20134104012