Applied Physics A

, Volume 107, Issue 1, pp 13–16

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

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.

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Fachbereich PhysikFreie Universität BerlinBerlinGermany

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