Dresden 2026 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 4: Perovskite and Photovoltaics: Synthesis and Performance

HL 4.8: Talk

Monday, March 9, 2026, 11:45–12:00, POT/0251

Beyond 1D: How Edge Effects Impact Ion Densities and Stability in Perovskite Solar Cells — •Jarla Thiesbrummel^{1, 2}, Francisco Peña-Camargo², Bruno Ehrler³, Dilara Abdel⁴, Patricio Farrell⁴, and Felix Lang¹ — ¹University of Potsdam, Potsdam, Germany — ²Helmholtz-Zentrum zu Berlin, Berlin, Germany — ³AMOLF, Amsterdam, Germany — ⁴Weierstrass Institut, Berlin, Germany

Understanding how mobile ions redistribute within metal halide perovskites is essential for interpreting device stability and quantitative ion-density measurements. While most studies focus on ion transport along the device stack, lateral ion motion and edge effects remain relatively unexplored, despite their strong relevance, especially in small-area, lab-scale photovoltaic devices. In this work, we investigate side collection of ions at device edges and its consequences for both apparent ion densities and long-term material stability, using a combination of 2D drift-diffusion simulations and experiments.

Keywords: Mobile ions; Stability; Lateral movement; Edge Effects; Efficiency