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Optical and EPR spectroscopy in pure and blended films of a novel lowband gap polymer*

Published online by Cambridge University Press:  06 December 2006

A. Aguirre ,
G. Janssen ,
E. Goovaerts ,
K. Colladet ,
D. Vanderzande  and
L. Lutsen
A. Aguirre
Affiliation:
University of Antwerp, Physics Department, CDE, Universiteitsplein 1, 2610 Antwerp, Belgium
G. Janssen
Affiliation:
University of Antwerp, Physics Department, CDE, Universiteitsplein 1, 2610 Antwerp, Belgium
E. Goovaerts*
Affiliation:
University of Antwerp, Physics Department, CDE, Universiteitsplein 1, 2610 Antwerp, Belgium
K. Colladet
Affiliation:
Hasselt University, Institute for Materials Research (IMO), Agoralaan Bld. D, 3590 Diepenbeek, Belgium
D. Vanderzande
Affiliation:
Hasselt University, Institute for Materials Research (IMO), Agoralaan Bld. D, 3590 Diepenbeek, Belgium
L. Lutsen
Affiliation:
IMEC, Division IMOMEC, Wetenschapspark 1, 3590 Diepenbeek, Belgium
*
etienne.goovaerts@ua.ac.be
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Abstract

Efficient charge transfer between a newly synthesized low band gap (LBG) conjugated polymer and the C60 derivative PCBM is demonstrated. Spectral and time-resolved photoluminescence (PL) measurements show strong quenching and charge separation in the picosecond time range. The charge transfer is further confirmed by light-induced electron paramagnetic resonance (EPR) measurements of both the positive polarons and the fullerene radicals, which can be resolved in high-frequency EPR. The potential for the LBG polymer to act as acceptor was examined in blends with the para-phenylene-vinylene polymer MDMO-PPV. No charge transfer, but instead energy transfer from MDMO-PPV to LBG occurs in these blends, as shown by PL spectroscopy.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 36 , Issue 3 , December 2006 , pp. 285 - 287
Copyright
© EDP Sciences, 2006

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Footnotes

*

This paper has been presented at “ECHOS06”, Paris, 28–30 juin 2006.

References

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