[1] Univ Angers, Grp Syst Conjugues Lineaires, IMMO, CNRS,UMR 6501, F-49045 Angers, France
[2] Univ Mediterranee, Fac Sci Luminy, CNRS, UMR 6114,Lab Mat Mol & Biomat, F-13288 Marseille, France
[3] Univ Angers, ERT Cellules Photovolt Plast, F-49045 Angers, France