Berlin 2015 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 60: Focus Session Hybrid Photovoltaics and Prevovskites I (joint session CPP HL, O)
CPP 60.3: Talk
Thursday, March 19, 2015, 10:15–10:30, C 130
Laser-ablated titania nanoparticles for aqueous processed hybrid solar cells — •Volker Körstgens1, Stephan Pröller2, Christoph Mayr1, Gonzalo Santoro3, Stephan V. Roth3, Hristo Iglev4, Reinhard Kienberger4, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85848 Garching — 2TU München, Munich School of Engineering, James-Franck-Str. 1, 85748 Garching — 3DESY Photon Science, Notkestr. 85, 22607 Hamburg — 4TU München, Physik-Department, LS Laser- und Röntgenphysik, James-Franck-Str. 1, 85748 Garching
Hybrid solar cells are produced by applying a new water-based processing method. The active layer consists of titanium dioxide nanoparticles produced by laser ablation in liquid and the water-soluble hole-conducting polymer poly[3-(potassium-6-hexanoate)thiophene-2,5-diyl] (P3P6T). The production of TiO2 nanoparticles via laser ablation in liquid is tested with two approaches, using TiO2 powder as target and a solid titanium target. The crystallinity of both components of the active layer, laser-ablated TiO2 and P3P6T is investigated with X-ray diffraction (XRD) and grazing incidence wide angle X-ray scattering (GIWAXS). A key factor for the performance of the active layer is the functionalization of TiO2 with the polymer P3P6T, which is probed with spectroscopic methods. The hybrid solar cells show high fill factors and open circuit voltages underlining the potential of the novel material and the environment-friendly processing method.