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Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Poster Session III

CPP 37.14: Poster

Mittwoch, 3. April 2019, 11:00–13:00, Poster B1

Electrical Characterization of the Double Perovskite Cs2AgBiBr6 — •Fabian Schmitz, Jonas Horn, and Derck Schlettwein — Justus-Liebig-Universität Gießen, Institut für Angewandte Physik

Hybrid organic-inorganic lead halide perovskites have been investigated intensively during the last decade. Issues of chemical stability, interfacial contact formation and the toxicity of lead represent the main present challenges for perovskite solar cells. Fully inorganic absorbers, such as the double perovskite Cs2AgBiBr6 provide a possible solution to some of these problems. Despite rather fast nongeminate recombination, this material is not only a promising approach to overcome the stability issues but also facilitates ambient processing with less problematic solvents and reduces the toxicity problems of prospective cells.[1] We prepared such inorganic layers to evaluate their suitability as absorber or buffer layers in solar cells by measuring their I-V-characteristics in the dark and under illumination, incident photon conversion efficiency and open circuit voltage decay. Further, we measured the electronic properties of Cs2AgBiBr6 layers using symmetric metal contacts in order to investigate I-V-hysteresis, which is a good indicator of contact characteristics in perovskite solar cells.
R. Kentsch, M. Scholz, J. Horn, D. Schlettwein, K. Oum, T. Lenzer, J. Phys. Chem. C, 122, 25940 (2018).

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