Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 3: Interfaces and Thin Films I

CPP 3.10: Vortrag

Montag, 14. März 2011, 12:45–13:00, ZEU 160

Thermal tuning of micro-structured conducting polymer thin films — •Robert Meier¹, Hsin-Yin Chiang¹, Matthias A. Ruderer¹, Shuai Guo¹, Johannes Wiedersich¹, Volker Körstgens¹, Jan Perlich², Stephan V. Roth², and Peter Müller-Buschbaum¹ — ¹TU München, Physik Department, LS Funkt. Mat., James-Franck-Str. 1, 85748 Garching, Germany — ²HASYLAB at DESY, 22603 Hamburg, Germany

Conducting polymers have already shown their great potential for versatile applications such as organic light emitting diodes or thin film transistors. For such applications many routes have been invented to structure thin films on the micro- and even the nanoscale. Since conducting polymers often have a low glass transition temperature the shape of polymeric microstructures can be tuned by posterior annealing. In this work we present an in-situ grazing incidence small angle x-ray scattering study of the influence of thermal treatment on micro-channels made of conducting polymers. These structures are fabricated via a new and easy fabrication routine combining a structured master and a film transfer technology. The temperature depending collapsing of the channels reveals a constant transition from sharp side walls to wavy surfaces. Such structured surfaces yield an increased light reflection and hence allow an enhanced optical absorption interesting for organic solar cells. The study is complemented with atomic force microscopy and scanning electron measurements of the polymeric microstructures before and after thermal treatment.