Regensburg 2025 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 32: Poster Session II
CPP 32.45: Poster
Thursday, March 20, 2025, 09:30–12:00, P3
Optimizing RbCsFAMA perovskite solar cells with piperazine-inspired passivation technique — •Bashudev Bhandari1,2,3, Zekarias Teklu Gebremichael1,2, Niklas Manikowsky2,3, Chikezie Williams Ugokwe1,2, Ulrich S Schubert1,2, and Harald Hoppe1,2 — 1Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich-Schiller-University Jena — 2Faculty of Physics and Astronomy, Friedrich-Schiller- University Jena, Jena, Germany — 3Laboratory of Organic and Macromolecular Chemistry (IOMC Jena), Friedrich-Schiller- University Jena, Jena, Germany
Perovskite solar cells (PSCs) have emerged as a promising photovoltaic technology, with extraordinary optoelectronic properties. However, stability and defects are the challenges of perovskite solar cells. This work explores the role of piperazine as a novel passivating agent to address these limitations. Piperazine's bifunctional structure enables effective defect passivation at the grain boundaries and interfaces of RbCsFAMA perovskite films, significantly reducing non-radiative recombination losses. Different characterization and imaging techniques photoluminescence spectroscopy, X-ray diffraction and scanning electron microscopy demonstrate improved crystallinity and electronic properties of the RbCsFAMA perovskite films after passivation. This improvement is shown to be transferred into solar cell devices.
Keywords: Perovskite; Piperazine; Passivation; Perovskite solar cells; Photovoltaics