Regensburg 1998 – scientific programme
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DS: Dünne Schichten
DS 15: Organische Schichten
DS 15.3: Fachvortrag
Tuesday, March 24, 1998, 18:45–19:00, H 34
Electron Transmission Through Organized Organic Thin Films for Discrete Initial Electron Kinetic Energies — •T. Quast1, B. Winter1, I.V. Hertel1, A. Haran2, and R. Naaman2 — 1Max-Born-Institut f"ur Nichtlineare Optik und Kurzzeitspektroskopie, Postfach 1107, D-12474 Berlin, Germany — 2Weizmann Institute of Science, Dept. of Chem. Physics, Rehovot 76100, Israel
Synchrotron ratiation (SR) pulses are used to eject electrons from a gold substrate covered with highly organized organic thin films (OOTF)in order to investigate their transmission probability through the OOTF as a function of the electron initial kinetic energy. By variation of the SR photon energy within a few eV above the Au-4f binding energy levels we controlled the initial kinetic energy of the substrate electrons. The observed oscillations in the transmission probability for porphyrin-based films as a function of the kinetic energy is argued to be due to band structure effects of the well-ordered molecular adsorbate. We also present valence photoemission spectra (PES) of different type OOTF in order to confirm the films’ molecular structural order.