% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@PHDTHESIS{Stadtmller:819719,
      author       = {Stadtmüller, Benjamin},
      title        = {{S}tudy of intermolecular interactions in hetero-organic
                      thin films},
      volume       = {61},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2016-05320},
      isbn         = {978-3-89336-871-6},
      series       = {Schriften des Forschungszentrum Jülich. Reihe
                      Schlüsseltechnologien/ Key Technologies},
      pages        = {VIII, 198 S.},
      year         = {2013},
      note         = {RWTH Aachen, Diss., 2013},
      abstract     = {In this work we present a systematic study of the structure
                      formation in hetero-organic systems consisting of the
                      prototype molecules
                      3,4,9,10-perylene-tetra-carboxylic-dianhydride (PTCDA) and
                      copper-II-phthalocyanine (CuPc) adsorbed on the Ag(111)
                      surface. The geometric structure of these systems is
                      investigated with established surface science techniques
                      like low energy electron diffraction, scanning tunneling
                      microscopy or the X-ray standing wave technique. The
                      electronic structure of the individual molecules in the
                      mixed films is revealed by angle resolved photoemission
                      spectroscopy data which are analyzed in the orbital
                      tomography approach introduced recently [PBF$^{+}$09,
                      PRU$^{+}$11]. Laterally mixed films of CuPc and PTCDA were
                      studied in order to reveal the influence of the substrate
                      mediated intermolecular interaction on the geometric and
                      electronic properties of the mixed film. The lateral order,
                      i.e., the size and shape of the unit cell, can be tuned by
                      changing the relative coverage of the molecules on the
                      surface. A highly surprising finding is that the charge
                      transfer between the individual molecules in the mixed film
                      and the substrate is no longer reflected by their adsorption
                      height on the surface. We explain this finding by a coupling
                      of the electronic levels of the molecules via a hybrid
                      state, which results in an additional population of the
                      PTCDA LUMO and a complete depopulation of the CuPc LUMO
                      level. Vertically stacked bilayer films allow to study both
                      the intermolecular interaction strength along the vertical
                      stacking direction and the influence of the second organic
                      layer on the properties of the metal organic interface. For
                      the adsorption of CuPc on a closed PTCDA layer on Ag(111), a
                      smooth organic-organic interface was formed. CuPc adsorbs in
                      the second layer on PTCDA and does not destroy the lateral
                      order of the PTCDA layer. The vertical distance between the
                      organic layers indicates a mainly electrostatic and van der
                      Waals interaction across the hetero-organic interface.
                      However, the chemical bonding between PTCDA and the silver
                      surface is changed upon the adsorption of CuPc. This is
                      reflected in an enhanced charge transfer into the PTCDA LUMO
                      level coinciding with an altered vertical adsorption height
                      of PTCDA which depends on the CuPc coverage. These findings
                      can be explained by an additional screening effect, induced
                      by the adsorption of CuPc.},
      cin          = {PGI-3},
      cid          = {I:(DE-Juel1)PGI-3-20110106},
      pnm          = {141 - Controlling Electron Charge-Based Phenomena
                      (POF3-141)},
      pid          = {G:(DE-HGF)POF3-141},
      typ          = {PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/819719},
}