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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 31: Hybrid and Perovskite Photovoltaics III (joint session CPP/DF/DS/HL, organized by DS)

CPP 31.7: Vortrag

Mittwoch, 9. März 2016, 11:15–11:30, H11

Water based hybrid solar cells: spray deposition of the active layer monitored with x-ray scattering methods — •Volker Körstgens¹, Christoph Mayr¹, Stephan V. Roth², Hristo Iglev³, Reinhard Kienberger³, and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching — ²DESY Photon Science, Notkestr. 85, 22607 Hamburg — ³TU München, Physik-Department, LS Laser- und Röntgenphysik, James-Franck-Str. 1, 85748 Garching

Spray-coating is a technique suitable for the large-scale and cost-effective preparation of hybrid photovoltaics. Unique environmentally friendly processing of hybrid solar cells can be realized with systems based on the solvent water. Using an active layer consisting of laser-ablated titania nanoparticles and water-soluble poly[3-(potassium-6-hexanoate)thiophene-2,5-diyl] (P3P6T) hybrid solar cells were realized. [1] For the performance of these devices the morphology of the active layer is of major importance. We followed the development of the morphology in situ with high spatial and temporal resolution. The mesoscale was probed with GISAXS and the crystallinity of the polymer and the inorganic component was probed with GIWAXS. The changes of the morphology of the active layer with increasing thickness and the dependence on the blocking layer chosen as the initial substrate are discussed and implications for an improved spray protocol will be given.

[1] Körstgens et al., Nanoscale 7, 2900 (2015).