Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 20: Poster: Colloids and Complex Liquids
CPP 20.35: Poster
Dienstag, 12. März 2013, 18:15–20:15, Poster C
In-situ spray deposition of colloidal thin films - a microbeam GISAXS study — •Stephan Volkher Roth1, Gunthard Benecke1,2, Sebastian Bommel1, Berit Heidmann1, Gerd Herzog1, Roman Mannweiler1, Jan Perlich1, Johannes Risch1, Gonzalo Santoro1, Matthias Schwartzkopf1, Shun Yu1, Kuhu Sarkar3, and Peter Müller-Buschbaum3 — 1DESY, Notkestraße 85, D-22607 Hamburg — 2MPI Coll. Inter. Golm, Abt. Biomat., Wissenschaftspark Potsdam-Golm, D-14424 Potsdam — 3Lehrst. funkt. Mat., TU München, James-Franck-Str. 1, D-85748 Garching
Fast, flexible and reliable production of thin films in organic photovoltaic devices has led to the use of fluid spray deposition as one method of choice [1,2]. This method is easy to employ while at the same time yielding fully functionally devices with comparable efficiencies. Spray deposition is a complex fluidic process based on nanolitre droplets. To tailor the structure-function relationship starting from the nanoscopic level, it is therefore mandatory to understand the layer formation during the spraying process in-situ. We combined colloidal solution spraying and grazing incidence small-angle x-ray scattering in-situ to explore the rapid structural build-up during spraying as a function of different solvents and especially as a function of temperature. We present our results on this high-throughput combinatorial study and show that especially the latter parameter is crucial to obtain homogenous thin polymeric films. [1] Vak et al., Appl. Phys. Lett. 91, 081102 (2007) [2] Alaa et al., Adv. Funct. Mat. 22, 4078 (2012)