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Regensburg 2016 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 41: Crystallization, Nucleation, Self Assembly II (joint session CPP/DY, organized by CPP)

CPP 41.2: Talk

Wednesday, March 9, 2016, 16:30–16:45, H42

Time-resolved characterization of aggregation during printing of thin filmsStephan Pröller1, Feng Liu2, Cheng Wang3, Thomas P. Russell2, Alexander Hexemer3, Peter Müller-Buschbaum4, and •Eva M. Herzig11Technische Universität München, Munich School of Engineering, Lichtenbergstr. 4, 85748 Garching , Germany — 2Department of Polymer Science and Engineering, University of Massachusetts Amherst, MA 01003 , USA — 3Lawrence Berkeley National Laboratory, Advanced Light Source Berkeley , CA 94720 , USA — 4TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching , Germany

The nanomorphology can strongly influence the physical properties of thin films. For example, polymer:fullerene mixtures used in the application for organic photovoltaics vary significantly in performance depending on the inner film morphology. Tracking the actual crystallization and aggregation processes on length scales ranging from sub-nanometers to several tens of nanometers reveals how the different growth processes compete with each other leading to the final film morphology.[1] We can track solvent removal, fullerene aggregation and polymer crystallization with time for different exerimental conditions using grazing incidence x-ray scattering revealing fundamental mechanisms of thin film formation. This information correlated with device performance helps to derive design principles for large scale, industrial thin film fabrication.

[1] Pröller et al, Adv. Energy Mater. DOI:10.1002/aenm.201501580

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