Photoinduced charge separation in poly(1,4-phenylenevinylene) derivatives studied by electron paramagnetic resonance

Thomsen, E. A., Keeble, D. J., Lochab, B., Burn, P. L., El-Mkami, H. and Samuel, I. D. W. (2008) Photoinduced charge separation in poly(1,4-phenylenevinylene) derivatives studied by electron paramagnetic resonance. Organic Electronics, 9 5: 809-815. doi:10.1016/j.orgel.2008.05.020


Author Thomsen, E. A.
Keeble, D. J.
Lochab, B.
Burn, P. L.
El-Mkami, H.
Samuel, I. D. W.
Title Photoinduced charge separation in poly(1,4-phenylenevinylene) derivatives studied by electron paramagnetic resonance
Journal name Organic Electronics   Check publisher's open access policy
ISSN 1566-1199
Publication date 2008-10
Sub-type Article (original research)
DOI 10.1016/j.orgel.2008.05.020
Volume 9
Issue 5
Start page 809
End page 815
Total pages 7
Place of publication Amsterdam, The Netherlands
Publisher Elsevier Science
Language eng
Subject 0906 Electrical and Electronic Engineering
0912 Materials Engineering
Abstract We report a study of photoinduced charge separation in poly(1,4-phenylenevinylene) (PPV) derivatives with enhanced exciton dissociation using light-induced electron paramagnetic resonance (EPR). Four polymers were studied; all contained alkoxy and fluorenyl side chain units, and two of them also contained a nitro group on the 7-positon of the fluorenyl moieties. Pulsed EPR detected a light induced polaron for all the polymers with the intensity significantly higher for those with nitro groups. A second center was observed for these materials and spectra could be fitted assuming a radical anion was localized on the nitro groups. The fraction of radical anion and polaron centers was comparable, consistent with intramolecular exciton dissociation for the PPV derivatives containing the nitro groups. © 2008 Elsevier B.V. All rights reserved.
Keyword PPVs
Exciton dissociation
Electron paramagnetic resonance
Q-Index Code C1
Q-Index Status Provisional Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Chemistry and Molecular Biosciences
 
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Created: Fri, 15 Jan 2010, 15:33:19 EST by Simon Utteridge on behalf of Faculty of Science