Regensburg 2010 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Poster: Organic Electronics and Photovoltaics
CPP 27.17: Poster
Mittwoch, 24. März 2010, 17:30–19:00, Poster C
Time-resolved luminescence spectroscopy of biomimetic, self-assembling porphyrins — •Jonas Conradt1,2, Hendrik Kuhn1, Peter Marek3, Manuel Reinhard2,5, Oliver Lösch5, Alexander Colsmann2,5, Uli Lemmer2,5, Teodor Silviu Balaban3,4, and Heinz Kalt1,2 — 1Karlsruhe Institute of Technology (KIT), Institute for Applied Physics (AP), Karlsruhe, Germany — 2Karlsruhe Institute of Technology (KIT), Center for Functional Nanostructures (CFN), Karlsruhe, Germany — 3Karlsruhe Institute of Technology (KIT), Institute for Nanotechnology (INT), Karlsruhe, Germany — 4Université Paul Cézanne Aix-Marseille III, ISM2 - Chirosciences, Marseille, France — 5Karlsruhe Institute of Technology (KIT), Institute for Light Technology (LTI), Karlsruhe, Germany
Self-assembling porphyrins represent a promising candidate in order to mimic natural bacteriochlorophylls, the light-harvesting system found in photosynthetic bacteria exhibiting chlorosomes. Such biomimetic porphyrins with a central zinc or magnesium atom show interesting photophysical properties. We performed time-resolved spectroscopy on these porphyrins in order to investigate the properties of monomers as well as self-assembled aggregates. An improved fitting algorithm is developed to identify more reliable the decay-associated spectra and the corresponding decay times. The large extinction coefficient of the porphyrins makes them an interesting candidate for photovoltaic application. They can help to improve the external quantum efficiency of hybrid and dye-sensitized solar cells. Their photovoltaic suitability is investigated.