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O: Oberflächenphysik

O 14: Postersitzung (Adsorption an Oberflächen, Epitaxie und Wachstum, Organische Dünnschichten, Oxide und Isolatoren, Phasenübergänge, Rastersondentechniken, Struktur und Dynamik reiner Oberflächen)

O 14.62: Poster

Montag, 8. März 2004, 18:00–21:00, Bereich C

Deposition of ordered TiOPc thin films by Supersonic Molecular Beam Epitaxy (SuMBE) — •Karsten Walzer¹, Tullio Toccoli², Alessia Pallaoro², Roberto Verucchi², Salvatore Iannotta², Torsten Fritz¹, and Karl Leo¹ — ¹Institut für Angewandte Photophysik, TU Dresden, 01062 Dresden, Germany — ²Institute for Photonics and Nanotechnology, Trento, Italy

The deposition of organic thin films for device applications requires a reliable method for the deposition of well-ordered molecular films significantly above the monolayer level. Searching for an alternative method to conventional organic molecular beam deposition (OMBD), we used Supersonic Molecular Beam Epitaxy (SuMBE) for the deposition of ordered organic films. The method uses the expansion of an inert carrier gas into vacuum with organic molecules seeded into the beam, which allows to control both energy and momentum of the molecules.

We present the SuMBE growth of titanyl phthalocyanine (TiOPc), which is of interest for organic solar cells. Substrates were glass and mica. Depending on substrate and substrate temperature we could adjust the growth of different crystal phases and surface morphologies. Especially the TiOPc phase II was grown at significantly lower substrate temperatures than usually needed in OMBD.