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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Interfaces and Thin Films II

CPP 18.1: Topical Talk

Dienstag, 23. März 2010, 13:45–14:15, H39

Functional thin films based on polymer- and hybrid-nanostructures for photovoltaic applications — •Peter Müller-Buschbaum — TU München, Physik-Department LS E13, James-Franck-Str. 1, 85747 Garching

Conducting photoactive polymers offer fascinating new possibilities with respect to energy research applications such as photovoltaics (PV). In the organic photovoltaics (OPV) approach both parts of a thin film, the n- and p-type material, are made from such conjugated polymers. In a hybrid approach typically the p-type conducting polymer is in contact with a metal oxide as for example titania. For both types of PV systems, the tailoring of the interface morphology between n- and p-type materials is essential. The small exciton diffusion length in conducting polymers causes a need for domain sizes on that scale, thereby resulting in the bulk heterojunction approach. Grazing incidence small and wide angle scattering allow for a determination of this inner structure, which is the essential key for tailoring morphologies. In OPV model systems the influence of blend ration [1] and prost production treatments [2] on both, device performance and morphology, are discussed.

[1] Ruderer, Müller-Buschbaum et al.; Chem. Phys. Chem. 10, 664-671 (2009)

[2] McNeill, Müller-Buschbaum, et al.; Adv. Funct. Mat. 19, 3103-3111 (2009)