Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 44: Poster IV: Thin film photovoltaics; Organic electronics and photovoltaics (jointly with CPP, HL, O); Organic thin films; Trends in atomic layer deposition (Focused session)

DS 44.29: Poster

Freitag, 30. März 2012, 09:30–12:00, Poster E

Optical and structural properties of organic heterostructures: PTCDA and SnPc on Au(111) — •Kristin Wachter, Marco Gruenewald, Matthias Meissner, Falko Sojka, Roman Forker, and Torsten Fritz — University of Jena, Institute of Solid State Physics, Max-Wien-Platz 1, 07743 Jena, Germany

The optical and structural properties of organic heterostructures of ultrathin 3,4,9,10-perylenetetracarboxylic-dianhydride (PTCDA) and tin(II)-phthalocyanine (SnPc) films grown on the reconstructed Au(111) surface were investigated by Differential Reflectance Spectroscopy (DRS), Low Energy Electron Diffraction (LEED) and Scanning Tunneling Microscopy (STM) under ultra-high vacuum conditions. The film growth was carried out by organic molecular beam epitaxy (OMBE). In our optical spectra we find clear indications for a strong interaction between the substrate and the first monolayer SnPc and PTCDA, respectively. The overlying PTCDA, however, decouples from the first monolayer. Furthermore, from LEED measurements we conclude a commensurate structure of a SnPc monolayer film on Au(111) at room temperature.