Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
DS: Fachverband Dünne Schichten
DS 62: Organic Thin Films I
DS 62.3: Vortrag
Freitag, 18. März 2011, 10:45–11:00, GER 38
Templating effect for organic heterostructure film growth: Perflluoropentacene on Diindenoperylene — •Alexander Gerlach1, Alexander Hinderhofer1, Takuya Hosokai1, Christian Frank1, Jiří Novák2, and Frank Schreiber1 — 1Institut für Angewandte Physik, Universität Tübingen, 72076 Tübingen, Germany — 2ESRF, BP 220, 38043 Grenoble Cedex 9, France
We present a systematic study of templating effects in organic heterostructure growth, i.e. the growth behavior of the top layer depends on the structural and morphological properties of the bottom layer [1,2]. We prepared thin films of the electron donor diindenoperylene (DIP) each with different crystal structure, grain size, and grain orientation. The electron acceptor perfluoropentacene (PFP) was evaporated on those template layers to form an organic heterostructure. Using x-ray reflectivity, grazing incidence x-ray diffraction, and atomic force microscopy we show that the structure and morphology of the PFP film varies with the properties of the DIP layer underneath. Two main structural effects are observed: PFP molecules in the top layer adopt partly the orientation of the DIP molecules in the bottom layer and the crystalline quality of the PFP layer correlates with the crystallinity of the DIP layer in terms of the coherent in-plane island size. Moreover, we find that the morphology and particularly the shape of the PFP domains depend strongly on DIP template layer.
[1] A. Hinderhofer et al., Europhys. Lett. 91 56002 (2010).
[2] A. Hinderhofer et al., submitted (2010).