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Synthesis and characterization of high molecular weight and regioregular poly[3-(4-octylphenyl)thiophene] for bulk heterojunction photovoltaic cells*

Published online by Cambridge University Press:  24 January 2007

F. Ouhib ,
R. C. Hiorns ,
S. Bailly ,
R. de Bettignies ,
A. Khoukh ,
H. Preud'homme ,
J. Desbrières  and
C. Dagron-Lartigau
F. Ouhib
Affiliation:
LPCP, CNRS-UMR 5067, Université de Pau et des Pays de l'Adour, Hélioparc, 2 Av. P. Angot, 64053 Pau Cedex, France
R. C. Hiorns*
Affiliation:
LPCP, CNRS-UMR 5067, Université de Pau et des Pays de l'Adour, Hélioparc, 2 Av. P. Angot, 64053 Pau Cedex, France
S. Bailly
Affiliation:
CEA-Saclay, LCS, DRT-LITEN-GENEC, Bât. 451, 91191 Gif-sur-Yvette, France
R. de Bettignies
Affiliation:
CEA-Saclay, LCS, DRT-LITEN-GENEC, Bât. 451, 91191 Gif-sur-Yvette, France
A. Khoukh
Affiliation:
LPCP, CNRS-UMR 5067, Université de Pau et des Pays de l'Adour, Hélioparc, 2 Av. P. Angot, 64053 Pau Cedex, France
H. Preud'homme
Affiliation:
LCABIE, CNRS-UMR 5034, Université de Pau et les Pays de l'Adour, Hélioparc, 2 Av. P. Angot, 64053 Pau, France
J. Desbrières
Affiliation:
LPCP, CNRS-UMR 5067, Université de Pau et des Pays de l'Adour, Hélioparc, 2 Av. P. Angot, 64053 Pau Cedex, France
C. Dagron-Lartigau
Affiliation:
LPCP, CNRS-UMR 5067, Université de Pau et des Pays de l'Adour, Hélioparc, 2 Av. P. Angot, 64053 Pau Cedex, France
*
roger.hiorns@univ-pau.frchristine.dagron-lartigau@univ-pau.fr
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Abstract

Various poly[3-(4-octylphenyl)thiophene]s (POPTs) were prepared either by oxidative polymerisation or by chain-growth Grignard metathesis (GRIM). In accordance with previous results, the former polymerisation yielded polydisperse POPT. The method based on the GRIM reaction made possible the preparation of medium and higher molecular weight polymers with lower polydispersities. The POPTs were found to have band-gaps of ca. 1.7 eV. The photovoltaic characteristics of POPTs-blend-[6,6]-phenyl C61 butyric acid methyl ester (PCBM) composites under AM 1.5 conditions in standard ITO/PEDOT-blend-PSS/POPT-blend-PCBM/LiF/Al solar cells were studied. It was found that POPT prepared via GRIM could deliver greater efficiencies than its equivalent prepared by oxidative polymerisation. It is expected that access to even higher molecular weight POPTs may improve the efficiencies of such devices.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 37 , Issue 3 , March 2007 , pp. 343 - 346
Copyright
© EDP Sciences, 2007

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Footnotes

*

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

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