Regensburg 2004 – wissenschaftliches Programm
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.