Dresden 2011 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films

DS 42.29: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

Influence of different solvents on the morphology in P3HT:PCBM bulk heterojunction systems for organic photovoltaics — •Shuai Guo¹, Matthias A. Ruderer¹, Volker Körstgens¹, Robert Meier¹, Hsin-Yin Chiang¹, Jan Perlich², and Peter Müller-Buschbaum¹ — ¹TU München, Physik Department, LS Funkt. Mat., James-Franck-Str. 1, 85748 Garching, Germany — ²HASYLAB at DESY, 22603 Hamburg, Germany

Polymer-based photovoltaics have become of major interest in basic research as well as in application. One very promising system consists of poly(3-hexylthiophene) (P3HT) and the fullerene derivate PCBM. We investigate the morphology of bulk heterojunction films based on P3HT:PCBM. Films are cast from different solvents. It is well known that the solvent properties strongly influence the film formation and therefore influence the performance. In this work the surface structure is investigated by optical microscopy and AFM. In combination with scattering techniques such as XRR, GI(U)SAXS and GIWAXS, revealing the inner structure as well as the crystallinity, the whole morphology of the active layer is detected. Consequently, the different morphologies formed from different solvents are determined and compared with the corresponding performance of these systems.