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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: POSTERS Nanoparticles

CPP 14.4: Poster

Dienstag, 24. März 2009, 14:00–16:30, P3

Time resolved luminescence spectroscopy of self–assembling magnesium porphyrins — •Jȩdrzej Szmytkowski^1,2, Jonas Conradt¹, Chilla Malla Reddy³, Teodor Silviu Balaban^2,3, and Heinz Kalt^1,2 — ¹Karlsruhe Institute of Technology (KIT), Universität Karlsruhe (TH), Institute of Applied Physics, Karlsruhe, Germany — ²Center for Functional Nanostructures (CFN), Karlsruhe, Germany — ³Karlsruhe Institute of Technology (KIT), Forschungszentrum Karlsruhe, Institute for Nanotechnology, Karlsruhe, Germany

Self–assembled porphyrins are promising materials to mimic natural bacteriochlorophylls (BChl) c, d or e encountered in the chlorosomes of photosynthetic bacteria. Such large assemblies of porphyrin metal complexes can be also used in hybrid solar cells as light harvesting antennas. In order to address their suitability we have studied the time resolved luminescence of novel magnesium diacetyl porphyrins. The decays of luminescence have been analyzed by a fitting procedure, which produces decay associated spectra (DAS). The analysis shows a short-lived component associated with the supramolecular architecture. This has implications for optimizing device geometries where the exciton diffusion lengths are not surpassed.