Seminar by Fanny Baumann, ICN2

In resolve of the global energy crisis, photovoltaics is an elegant solution to a non-exhaustive source of energy, the sun. Perovskite Solar Cells (PSCs) show promise for flexible, cheap, and lightweight photovoltaics, but before successful implementation the technology must overcome challenges with stability guarantees. With many both reversible and irreversible potential instability-phenomena, detection of initial instability under any unavoidable stressor that PSCs are subjected to can be aided by in-situ characterization. By monitoring physical and chemical properties of full device PSCs under combined stressors one can follow the decay in performance and material integrity (strain, crystallinity, impedance) in real time. Several in-situ operational stability tests were performed using X-ray diffraction (XRD), photoluminescence (PL) and electrochemical impedance spectroscopy (EIS).The adapted procedures allowed for comparison with stability enhancing methods including MXene-interlayers and precursor additives, to understand their effects in devices and to further tailor stability enhancing efforts in PSCs.
 

Dr Baumann performed her undergraduate studies in the Engineering Nanoscience program at Lund University, in parallel with pursuing world class athletics (windsurfing). Her master thesis was supervised by Anders Hagström (EPFL) and Eva Unger (LU). She continued with PhD studies at ICN2 in Barcelona and defended her thesis in Sept 2025.
 

All are very welcome!