Dresden 2020 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 70: Hybrid Perovskite and Photovoltaics II (joint session CPP/HL)

CPP 70.4: Talk

Wednesday, March 18, 2020, 15:45–16:00, ZEU 260

In-situ study of slot-die printed titania films for up-scale fabrication of all-solid-state dye-sensitized solar cells — •Nian Li¹, Wei Chen¹, Manuel Scheel¹, Volker Körstgens¹, Matthias Schwartzkopf², Stephan V. Roth², and Peter Müller-Buschbaum^1,3 — ¹Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany. — ²Deutsches Elektronen-Synchrotron DESY Notkestrasse 85, D-22603 Hamburg, Germany. — ³Heinz Maier-Leibnitz Zentrum (MLZ) Technische Universität München Lichtenbergstr. 1, D-85748 Garching, Germany.

Printing, a simple and low-cost technique, is employed to fabricate mesoporous titania films as electron-transporting layers for upscaling all-solid-state dye-sensitized solar cells (DSSCs). The deposition methods strongly affect the final titania morphology, and further solar cell efficiency. Therefore, a detailed understanding of structure formation is of crucial importance for optimizing the industrial coating films. In the present work, we provide insights into the structure evolution of slot-die printed films via in situ grazing-incidence small-angle X-ray scattering (GISAXS). The printing-solution synthesis is performed by sol-gel chemistry and a structure-directing template polystyrene-block-polyethylene oxide (PS-b-PEO) to achieve the structure tailoring. The evolution of nanostructure length scales of the titania/PS-b-PEO composite film is revealed in real-time and in situ during slot-die printing. The resulting mesoporous titania films with highly ordered structures serve as photoanodes of all-solid-state DSSCs.