Observation of Very Narrow Linewidths in the Fluorescence Excitation Spectra of Single Conjugated Polymer Chains at 1.2 K

Florian A. Feist, Giovanni Tommaseo, and Thomas Basché
Phys. Rev. Lett. 98, 208301 – Published 15 May 2007

Abstract

Fluorescence emission and excitation spectra of single poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] polymer molecules embedded in poly(methylmethacrylate) have been recorded at 1.2 K. The ubiquitous spectral diffusion causes large variations in the spectral shape and apparent linewidth in the emission spectra. Nevertheless, we find very narrow (0.1cm1) purely electronic zero-phonon lines in the excitation spectra, which are 2 orders of magnitude smaller than previous estimates of the homogeneous linewidth. These results complement the molecular description of the low energy transitions in conjugated polymers.

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  • Received 26 February 2007

DOI:https://doi.org/10.1103/PhysRevLett.98.208301

©2007 American Physical Society

Authors & Affiliations

Florian A. Feist, Giovanni Tommaseo, and Thomas Basché*

  • Institut für Physikalische Chemie, Johannes Gutenberg-Universität, 55099 Mainz, Germany

  • *To whom correspondence should be addressed. Electronic address: thomas.basche@uni-mainz.de

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Issue

Vol. 98, Iss. 20 — 18 May 2007

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