Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 66: Focus Session (CPP with HL): Hybrid photovoltaics and perovskites I

HL 66.3: Vortrag

Donnerstag, 19. März 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.