Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 6: Poster: Structural Ordering and Electronic Transport (joint focus with HL)

CPP 6.14: Poster

Monday, March 26, 2012, 17:30–19:30, Poster A

Tuning of Crystal Orientation in Conducting Polymer Blends — •Eva M. Herzig¹, Klaus Wagenbauer¹, Volker Körstgens¹, Weijia Wang¹, Yuan Yao¹, Adeline Buffet², Stephan V. Roth², and Peter Müller-Buschbaum² — ¹TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — ²HASYLAB at DESY, 22603 Hamburg, Germany

Surface sensitive x-ray diffraction is a powerful method to investigate molecular orientation in thin conducting polymer films [1]. In organic electronics successful charge transport depends strongly on the structural arrangement of the organic components because charge transport is anisotropic in such materials. Therefore control over crystallization and crystal orientation is highly desirable to improve device performance.

Using grazing incidence wide angle x-ray scattering we are able to show that the addition of an amorphous, electrolytic polymer results in an increased molecular ordering in standard organic photovoltaic films. This ordering is examined with respect to different parameters like temperature and substrate surface thereby showing ways of deliberately influencing the polymer crystal orientation.
[1] J. Perlich, J. Rubeck, S. Botta, R. Gehrke, S. V. Roth, M. A. Ruderer, S. M. Prams, M. Rawolle, Q. Zhong, V. Körstgens, and P. Müller-Buschbaum, Rev. Sci. Instrum. 81, 105105 (2010)