Berlin 2012 – scientific programme

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DS: Fachverband Dünne Schichten

DS 44: Poster IV: Thin film photovoltaics; Organic electronics and photovoltaics (jointly with CPP, HL, O); Organic thin films; Trends in atomic layer deposition (Focused session)

DS 44.23: Poster

Friday, March 30, 2012, 09:30–12:00, Poster E

Wavelength dependent pathways in the degradation of P3HT and PCPDTBT — •Ulf Dettinger¹, Holger Hintz¹, Catharina Sessler¹, Heiko Peisert¹, Hans Joachim Egelhaaf², and Thomas Chassé¹ — ¹Eberhard-Karls-University, Institute for Physical and Theoretical Chemistry, Auf der Morgenstelle 18, D-72076 Tübingen, Germany — ²Konarka Technologies GmbH, Landgrabenstr. 94, D-90443 Nürnberg, Germany

Organic photovoltaic (OPV) present a promising and cost effective technology for the energy market of the future. Although the race for high efficiencies is still on the run, the stability of the single device materials becomes more and more important. Therefore photo degradation of P3HT and PCPDTBT thin films was investigated under both standard Air Mass 1.5 conditions and single wavelength illumination. The degradation of the materials was monitored using UV/VIS and FTIR transmission spectroscopy. Generally PCPDTBT exhibits an enhanced stability compared to the state of the art material P3HT. The effectiveness of the photo reaction does not follow the absorption spectrum in the case of P3HT suggesting a radical based mechanism which is not initiated by the polymer absorption[1].

[1] H. Hintz, H.J. Egelhaaf, L. Lüer, J. Hauch, H. Peisert, T. Chassé Chem. Mater., 2011, 23 (2), 145-154