Regensburg 2019 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Poster Session III

CPP 37.6: Poster

Wednesday, April 3, 2019, 11:00–13:00, Poster B1

Impact of microstructure of hybrid perovskite powders on the mechanical properties of completely dry processed perovskite layers via pressing — •Maximilian Schultz¹, Nico Leupold², Konstantin Schötz¹, Ralf Moos², and Fabian Panzer¹ — ¹Soft Matter Optoelectronics — ²Department of Functional Materials, all University of Bayreuth, Bayreuth, 95440, Germany

Optoelectronic devices based on hybrid perovskites have undergone a remarkable development within the last few years. However, state of the art processing approaches such as solution processing or evaporation suffer from an intrinsically high complexity, as the actual perovskite crystallization and its film processing happen simultaneously and are inextricably interconnected.

Here we present an alternative, entirely dry processing approach, which decouples perovskite crystallization and film formation, by using readily prepared perovskite powders and produce films by appropriate mechanical pressure treatment. We show how the used pressure and the powder microstructure, i.e. particle size and stoichiometry affect the mechanical stability, compactness and surface roughness of the pressed layers. We further address how specific temperature treatment during the pressing step can be used to improve the properties of the pressed layer.