Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 42: Poster Session II (Nanostructures at surfaces: arrays; Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: Other; Nanostructures at surfaces: Wires, tubes; Metal substrates: Adsorption of O and/or H; Metal substrates: Clean surfaces; Metal substrates: Adsorption of organic/bio moledules; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsorption of inorganic molecules; Metal substrates: Epitaxy and growth; Heterogeneous catalysis; Surface chemical reactions; Ab-initio approaches to excitations in condensed matter; Organic, polymeric, biomolecular films– also with adsorbates; Particles and clusters)
O 42.106: Poster
Mittwoch, 25. März 2009, 17:45–20:30, P2
IRRAS studies on a new emitter material for OLEDs — •Tobias Glaser1, Martin Binder1, Annemarie Pucci1, Christian Lennartz2, and Christian Schildknecht2 — 1Kirchhoff-Institut für Physik, Universität Heidelberg — 2BASF SE, 67056 Ludwigshafen
A new emitter material for organic light emitting devices (OLEDs) called CN-PMBIC is investigated by infrared (IR) spectroscopy. Experiments were performed under UHV conditions with a commercial FT IR spectrometer flanged to the chamber. Thin films of the organic material were deposited by vapor sublimation on different substrates. Especially infrared reflection absorption spectroscopy (IRRAS) is a well-suited method to investigate the growth of the organic films. Furthermore, the influence of Ca on CN-PMBIC was studied at room temperature and at 100 K. Ca plays an important role as cathode material in OLED fabrication. The evaporation of Ca onto a film of CN-PMBIC gives rise to new IR features that strongly depend on the sequence in which the various materials are deposited and on the sample temperature. The new features are supposed to be related to dynamic charge transfer effects.