Berlin 2015 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 31: P3: Hybrid Photovoltaics and Preovskites

CPP 31.2: Poster

Tuesday, March 17, 2015, 14:00–16:00, Poster B

Light harvesting structured titania films prepared by PDMS molds — •Bo Su, Yichuan Rui, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching

Due to the high surface to volume ratio and the bicontinuous morphology, foam-like nanostructures are becoming more interesting in photovoltaics. To improve the power conversion efficiency, a light-trapping strategy is widely used in dye-sensitized solar cells (DSSCs) and organic photovoltaics (OPVs). In our study, we demonstrate foam-like structured titania films, which are made by blade coating and soft-molding methods, with an additional superstructure in the micrometer range. The master to implement the superstructure is prepared by photolithography. Then replica molds are made from the master with poly(dimethyl siloxane) (PDMS). Finally, the different light trapping structured titania films are prepared by applying these PDMS molds. After the fabrication of DSSCs, the photocurrent-voltage characteristics of the DSSCs are measured. The morphology of the films is characterized with SEM and AFM. The optical properties are determined by UV/Vis spectroscopy.