Roman Forker

Alkali Metal Doped Organic Molecules on Insulators: Charge Impact on the Optical Properties

Supporting Information on: DOI: 10.1002/adma.201000891 Alkali Metal Doped Organic Molecules on Insulators: Charge Impact on the Optical Properties By Thomas Dienel, Andreas Krause, Ronald Alle, Roman Forker, Klaus Meerholz, and Torsten Fritz 1 Institut fur Angewandte Photophysik, Technische Universitat Dresden, 01062 Dresden (Germany) 2 Anorganisch-Chemisches Institut, Universitat Zurich, Winterthurerstrasse 190, 8057 Zurich (Switzerland) 3 Institut fur Physikalische Chemie, Universitat zu Koln, Luxemburgerstrasse 116, 50939 Koln (Germany) 4 Institut fur Festkorperphysik, Friedrich-Schiller-Universitat Jena, Helmholtzweg 5, 07743 Jena (Germany)

Degradation and segregation: Thermal stability and highly ordered epitaxial thin films of large aromatic molecules

The authors present an investigation of highly ordered epitaxial thin films of large organic molecules, namely quaterrylene derivatives. Even though the raw material quaterrylene tetracarboxylic diimide (QTCDI) starts to decompose below its sublimation temperature, epitaxial monolayers could be grown. By modifying the preparation procedure, highly ordered domains of quaterrylene dicarboxylic monoimide, being the main decomposition product of QTCDI, could also be produced. Although both molecules bear strong similarities, they grow in a dissimilar fashion influenced by their substituents and molecular dipole and quadrupole moments. The structures are characterized by scanning tunneling microscopy and, in case of QTCDI, low energy electron diffraction.

Optical Constants of - and -Zinc(II)-Phthalocyanine Films

We present a dataset of the optical constants of α- and β-zinc(II)-phthalocyanine (ZnPc). They were determined accurately from transmission and differential reflectance spectra, with the surface roughness taken into account. For this purpose, thin films were prepared on quartz glass substrates via physical vapor deposition and characterized by ultraviolet-visible (UV-Vis) spectroscopy before as well as after a well-defined annealing process. Kramers-Kronig consistency of the optical constants obtained was checked by means of a numerical algorithm.