Dresden 2026 – scientific programme

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UP: Fachverband Umweltphysik

UP 8: Poster

UP 8.5: Poster

Wednesday, March 11, 2026, 15:00–17:00, P1

The Impact of Ionic Conductivity on Device Performance in Perovskite Solar Cells — •Immo Petersen^{1, 2}, Aaron Schüller-Ruhl^{1, 2}, Tim Timewell^{1, 2}, Ali Reza Nazari Pour^{1, 2}, Lukas Wagner^{1, 2}, and Jan Christoph Goldschmidt^{1, 2} — ¹Physics of Solar Energy Conversion Group, Department of Physics, Marburg University, Germany. — ²mar.quest Marburg Center for Quantum Materials and Sustainable Technology, Marburg University, Germany.

Perovskite solar cells (PSCs) are a promising candidate for cost-effective climate change mitigation; however, their relatively low operational stability remains a major challenge. Recent studies identified mobile ions to be one of the main causes for operational efficiency losses. This work investigates how the density of migrating ions affects the electrical device performance.

For determining the density and mobility of migrating ions, Fast Hysteresis, Mott-Schottky analysis and dark-CELIV measurements are performed. In these methods, a defined voltage protocol is applied to the PSC and the resulting current response is recorded. The measurements are carried out on PSCs with varying electrode materials and different hole transport layers. These layers influence the properties of migrating ions and the surface-recombination rate. In a second step, drift-diffusion simulations are used to model ion dynamics and their influence on the electrical behavior of PSCs.

We found that the magnitude of surface recombination strongly modifies the impact of accumulating ions. Untangling the underlying mechanisms is a central objective of this work.

Keywords: perovskite solar cells; mobile ion migration; drift-diffusion simulation; surface recombination; carbon electrode