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Proceedings Paper

Improving the photovoltaic properties of organic solar cells by structuring the P3HT:PCBM photoactive layer with functionalized SWCNTs
Author(s): H. Derbal-Habak; C. Bergeret; J. Cousseau; J. M. Nunzi
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Paper Abstract

The optical and electrical properties of bulk polymer RR-P3HT (Regio-Regular Poly(3-hexylthiophène-2,5- diyl):PCBM (Methanofullerene Phenyl-C61-Butyric-Acid-Methyl-Ester) heterojunction incorporating single wall carbon nanotubes (SWCNTs) have been already reported by a number of research groups. We investigated a new approach to functionalize CarboLex single wall carbon nanotubes (SWCNTs-e) for increasing their dispersion in various solvents. The addition of SWCNTs-e in the matrix of P3HT:PCBM improves the photovoltaic (PV) characteristics. Results show that the photovoltaic parameters depend on the concentration of SWCNTs-e. The incorporation of low concentrations of SWCNTs-e in the photoactive layer increases the current density Jsc before annealing. We attribute the improved performance to partial crystallisation of the RR-P3HT. As revealed by XRD studies and confirmed by the absorbance spectra which exhibit the characteristic 600 nm shoulder. Interestingly, we observed also that doping the P3HT:PCBM system with the functionalized SWCNTs increases Voc from 0.583 to 0.744 V.

Paper Details

Date Published: 30 August 2010
PDF: 6 pages
Proc. SPIE 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion, 77720P (30 August 2010); doi: 10.1117/12.859916
Show Author Affiliations
H. Derbal-Habak, Univ. d'Angers (France)
Institut Matériaux Microélectronique Nanosciences de Provence, CNRS, Univ. Aix-Marseille (France)
C. Bergeret, Lab. Moltech Anjou, CNRS, Univ. d'Angers (France)
J. Cousseau, Lab. Moltech Anjou, CNRS, Univ. d'Angers (France)
J. M. Nunzi, Queen's Univ. (Canada)

Published in SPIE Proceedings Vol. 7772:
Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion
Loucas Tsakalakos, Editor(s)

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