Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 19: Poster: Crystallization, Nucleation and Self Assembly
CPP 19.10: Poster
Dienstag, 12. März 2013, 18:15–20:15, Poster C
Control over crystallization and crystallite orientation in conducting polymer blend films — •Eva M. Herzig1, Ammara Akthar1, Anna Naumann1, Claudia M. Palumbiny1, Weijia Wang1, Shuai Guo1, Gregory Tainter1, Jan Perlich2, Shun Yu2, Stephan V. Roth2, and Peter Müller-Buschbaum1 — 1TU München, Physik Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — 2HASYLAB at DESY, 22603 Hamburg, Germany
Various parameters can be exploited to influence the morphology and therefore the performance of conducting polymer blends used in photovoltaic applications [1]. In particular charge transport is anisotropic in many conducting polymers and hence is sensitive to molecular orientation and presence of crystalline domains. Therefore it is highly desirable to have control over crystallization and crystallite orientation. We demonstrate for the well-studied system P3HT:PCBM the response of molecular ordering to the addition of two different passive components. The thorough investigation of these systems, using advanced scattering techniques, spectroscopy and microscopy measurements, allow us to select well-defined preparation protocols to deliberately choose the predominant orientation of crystalline domains in the thin conducting polymer blend films.
[1] M. A. Ruderer, and P. Müller-Buschbaum, Soft Matter 7, 5482 (2011)