Dresden 2017 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 44: Postersession II
DS 44.8: Poster
Donnerstag, 23. März 2017, 17:00–19:00, P1C
Infrared studies of device relevant interfaces - energetic and morphological insights — •Sabina Hillebrandt1,2, Sebastian Beck1,2, and Annemarie Pucci1,2 — 1Kirchhoff-Insitut für Physik, Universität Heidelberg, Germany — 2Innovationlab GmbH, Heidelberg, Germany
Organic electronic devices consist of stacked organic as well as inorganic materials and the device performance is mainly influenced by the interfaces of the layers. The investigation of charge generation, injection and transport at these interfaces is a major key to the basic understanding of the fundamental mechanisms in organic electronics. We use interface layers of metal oxides, i.e. nickel oxide (NiO) or molybdenum oxide (MoO3), and self-assembled monolayers (SAM) to engineer the surface of certain electrode materials in order to improve charge transport at the inorganic/organic interface. With their inherent dipole SAMs can improve the energetic alignment at the interface. Polarization dependent infrared spectroscopic studies reveal the orientation of such SAMs as well as the influence of the interlayers on the orientation of the subsequent organic semiconductor material like fluorinated zinc phtalocyanine (F4ZnPc). Additionally, supported by density functional theory (DFT) calculations, charge transfer between the electrode material and the organic semiconductor can be investigated, giving a deep insight into the energetic and morphological properties at the interface.