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Applied Physics A

, Volume 107, Issue 1, pp 13–16 | Cite as

Polaron dynamics in thin polythiophene films studied with time-resolved photoemission

  • Erwan Varene
  • Petra Tegeder
Rapid communication

Abstract

Femtosecond time-resolved two-photon photoemission spectroscopy is employed to study the dynamics of an excited state in a thin regioregular poly(3-hexylthiophene) (RR-P3HT) film deposited on a conducting polymer poly(3,4-ethylene-dioxythiophene): poly-(styrenesulfonate) (PEDT:PSS) electrode following optical excitation at 2.1 eV. We found that the biexponential decay of this excited state has a fast component (2.6 ps) assigned to bound polaron pairs which recombine quickly or separate to be added to the slow component (7.6 ps). The latter is attributed to polarons generated via charge transfer between adjacent polymer chains.

Keywords

Polaron Band P3HT Film Excited State Dynamic Visible Pulse Regioregular Poly 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

Funding by the Deutsche Forschungsgemeinschaft (DFG) through the priority program SPP 1355 “Elementary Processes in Organic Photovoltaics” is gratefully acknowledged.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Fachbereich PhysikFreie Universität BerlinBerlinGermany

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