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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 16: Perovskite and Photovoltaics II (joint session HL/KFM)

KFM 16.2: Vortrag

Donnerstag, 20. März 2025, 09:45–10:00, H13

Stabilizing Perovskite Solar Cells by Organic Salts Under One Full Sun and Maximum Power Point Tracking — •Zekarias Teklu Gebremichael^{1, 2}, Niklas Manikowsky^{2, 3}, Chikezie Williams Ugokwe^{1, 2}, Bashudev Bhandari^{2, 3}, Ulrich S. Schubert^{1, 2}, and Harald Hoppe^{1, 2} — ¹Laboratory of Organic and Macromolecular Chemistry (IOMC Jena), Friedrich-Schiller- University Jena, Jena, Germany — ²Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich-Schiller-University Jena, Jena, Germany — ³Faculty of Physics and Astronomy, Friedrich-Schiller- University Jena, Jena, Germany

The use of organic halide salts to passivate metal halide perovskite (MHP) surfaces have been studied extensively. Passivating the surface defects of the MHP is of critical importance for realizing high-efficiency and stability of perovskite solar cells (PSCs). Here we discuss the success of a multifunctional organic salt used as passivation material for grain boundary defects and as molecular sealing layer in terms of stabilization. To assess the stability of PSCs, maximum power point tracking is seemingly the most realistic condition for the ageing test. Here, PSCs made from the four cation RbCsMAFA based perovskite absorber layer were aged under full light with maximum power point tracking and in addition they were tested periodically by IV-characterization, in order to yield all photovoltaic parameters for improved understanding of the ageing process.

Keywords: Perovskite,; passivation,; Maximum power point tracking (MPPT)