Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Poster: Nanoparticles and Composite Materials

CPP 8.34: Poster

Montag, 26. März 2012, 17:30–20:00, Poster A

Evolution of lateral structures during the functional stack build-up of P3HT:PCBM based bulk heterojunction solar cells — •Shuai Guo¹, Matthias Ruderer¹, Christopher Birkenstock¹, Ezzeldin Metwalli¹, Monika Rawolle¹, Jan Perlich², and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — ²HASYLAB at DESY, Notkestr. 85, 22603 Hamburg, Germany

Solution-processable organic photovoltaics have shown great promise for providing an entirely new generation of ultralow-cost, lightweight, and flexible electronic devices, which would be an ideal alternative to replace the traditional expensive silicon-based semiconductors. Here, the most prominent material system 1,2-dichlorobenzene solution processed P3HT:PCBM bulk heterojunction (BHJ) solar cells, are prepared and investigated at different steps of the multi-layer stack build-up. The inner structural characteristics are probed with grazing incidence small angle X-ray scattering (GISAXS) and X-ray reflectivity. The surface morphology is detected with atomic force microscopy. Therefore, an in-depth knowledge of three-dimensional morphology of the polymer-based solar cell, starting from the cleaned ITO substrate up to the final post-treated solar cell, is generated. Three noticeable lateral structures, originating from the substrate, the active layer and the aluminum electrode, are detected with GISAXS. The correlation between nanostructure within the thin films and the solar cell efficiency are addressed.