Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 47: Electronic Structure of Surfaces: Spectroscopy, Surface States
O 47.4: Poster
Dienstag, 8. März 2016, 18:15–20:30, Poster E
Long-Lived Excited States in Porphyrin Nanostructures — •Hannes Hartmann1, Ingo Barke1, Alexej Friedrich1, Per-Arno Plötz1, Kevin Oldenburg1, Johannes A.A.W. Elemans2, Mohammadreza Bahrami1, Karl-Heinz Meiwes-Broer1, Oliver Kühn1, Stefan Lochbrunner1, and Sylvia Speller1 — 1University of Rostock, Institute of Physics, 18059 Rostock, Germany — 2Radboud University Nijmegen, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands
Long-lived excitons are a promising pathway for energy transfer over long distances. Here we show that self-organized porphyrin nanostructures host excited states with surprisingly long lifetimes. The molecule aggregates are investigated by spatially and time-resolved photoemission electron microscopy (PEEM). While time-resolved fluorescence spectroscopy reveals lifetimes in the nanosecond range, additional decay processes are observed by PEEM with substantially longer time constants. These optically dark states may enable an efficient energy transport channel within the aggregates.