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DS: Fachverband Dünne Schichten

DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films

DS 42.39: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

IR studies on an emitter/host mixture — •Tobias Glaser¹, Christian Lennartz², Christian Schildknecht², and Annemarie Pucci¹ — ¹Kirchhoff-Institut für Physik, Universität Heidelberg — ²BASF SE, Ludwigshafen

In this study, we show how infrared spectroscopy can be used to investigate the mixing of two organic materials. The materials, in this case a phosphorescent emitter that was developed for organic light emitting devices and a suitable host material, were deposited by vapour sublimation under ultra-high vacuum conditions. By comparing the experimental spectra of thin layers of the pure materials to quantum chemical calculations, the calculated vibrational modes could be assigned to the measured absorption bands. Embedding the emitter into the host by simultaneous evaporation of these two materials gives rise to only small changes in the relative intensity of the IR absorption bands due to the change in background polarisability, but significantly effects the photoluminescence.