Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 74: Ultrafast Electron and Spin Dynamics at Interfaces
O 74.2: Poster
Wednesday, March 9, 2016, 18:15–20:30, Poster A
Exciton Dynamics in Thin Sexithiophene Films on Au(111) — Wibke Bronsch1, •Sebastian Baum1, Malte Wansleben1,2, Kristof Zielke1, Cornelius Gahl1, and Martin Weinelt1 — 1Freie Universität, Berlin, Deutschland — 2Physikalisch-Technische Bundesanstalt, Berlin, Deutschland
Sexithiophene (6T)/Gold is a model system for an organic semiconductor/metal interface. Exciton formation and relaxation as well as charge transfer processes across those interfaces are of high relevance in molecular electronics. Starting from the optical properties of thin 6T films on Au(111) investigated by differential reflectance spectroscopy, we performed time-resolved two-photon photoelectron spectroscopy using different excitation energies below and within the vibrational progression of the S1 absorption band. As a result we can draw a detailed picture of the exciton dynamics.