Dresden 2026 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 4: Perovskite and Photovoltaics: Synthesis and Performance
HL 4.7: Talk
Monday, March 9, 2026, 11:30–11:45, POT/0251
minimizing ionic losses in DMSO-free tin-based perovskite solar cells — •Paria Forozi Sowmeeh1, Shengnan Zuo2, Chiara Frasca2, Biruk Alebachew Seid1, Sercan Ozen1, Wentao Liu2, Mahmoud Hussein Aldamasy2, Yuan Zhang3, Fengshuo Zu2,3, Norbert Koch2,3, Martin Stolterfoht4, Antonio Abate2, Artem Musiienko2, and Felix Lang1 — 1Institute of Physics and Astronomy University of Potsdam, Potsdam-Golm, Germany — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany — 3Department of Physics, Humboldt University of Berlin, Berlin, Germany — 4Electronic Engineering Department, The Chinese University of Hong Kong, Hong Kong SAR, China
The presence of mobile ions and the potential toxicity of Pb-based perovskite solar cells remain two major drawbacks for their commercialization despite their exceptional optoelectronic properties. On the other hand, Sn-based perovskites, which are believed to exhibit smaller ion-induced instabilities, have been revealed as eco-friendly perovskite counterparts, though thorough investigations are still missing. Herein, we investigate the nature of mobile ions, quantify the ionic loss within Sn-based perovskite solar cells and compare with those of Pb-based and mixed PbSn devices. We report minimal ionic losses and over 10-fold lower ion densities in DMSO-free processed Sn samples compared to Pb-based perovskites. The Sn-based devices also exhibit the lowest associated ionic losses with sustained device stability upon illumination. This study paves the way for development of innovative, stable thin film solar cells with suppressed ion migration.
Keywords: ion migration; perovskite solar cell; Tin-based perovskite; DMSO-free solar cell