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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Fundamentals of Perovskite Photovoltaics (joint session CPP, DS, HL)

CPP 13.4: Poster

Montag, 20. März 2017, 18:30–21:00, P1A

morphology evolution of titania films during in situ spray coating for perovskite solar cells — •Bo Su¹, Herbert A. Caller-Guzman¹, Volker Körstgens¹, Yichuan Rui², Yuan Yao¹, Stephan V. Roth³, and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — ²College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, P. R. China — ³DESY, Notkestr. 85, 22607 Hamburg, Germany

We combine a sol-gel route with spray coating to obtain porous titania films. Spray coating is used as deposition method since it is allowing for scaling-up to large scale production. A block copolymer template assisted sol-gel process is used to form nanostructured titania films. The structure evolution is probed with in situ GISAXS during the spray coating process, enabling the detection of characteristic length scales during fabrication. The morphology of the sprayed films is characterized ex-situ with SEM, TEM and optical microscopy as well. In addition, the crystalline structure of the titian films is probed with XRD. The perovskite solar cells based on sprayed titania films are characterized under AM 1.5G standard condition. We extract a structure-function relationship for different spray parameters.