For our 18th webinar, we are pleased to welcome our invited guest, Dr. Mostafa Othman, Scientist at the Photovoltaics and Thin Film Electronics Laboratory (PV-LAB), EPFL. Mostafa recently completed his PhD in Photonics (Micro-engineering) at EPFL, where his research focused on perovskite solar cells, thin-film optoelectronics, and degradation mechanisms in emerging photovoltaic materials.
He will be presenting:
Stacking faults as primary degradation seeds in formamidinium-rich perovskite absorbers
In this talk, Dr. Othman will discuss how crystallographic defects act as early degradation sites in formamidinium-rich perovskite absorbers, providing new insights into performance loss and long-term stability of perovskite solar cells.
The webinar will be hosted by Matthias Diethelm.
Date & Time: Tuesday, 10 February 2026, 10:00–11:00 (CET)
This webinar is a must-attend for researchers from both industry and academia working on perovskite solar cell research, degradation, and stability.
We look forward to seeing you there!
Invited Speakers
Dr. Mostafa Othman
Doctoral Assistant, EPFL
Mostafa Othman was a Marie Skłodowska-Curie Early-Stage Fellow at PV-Lab, EPFL. He successfully defended his PhD thesis last October under the supervision of Dr Aïcha Hessler-Wyser, Dr Christian M. Wolff and Prof. Christophe Ballif. His PhD work has been focused on correlating nanoscale landscape of halide-perovskite materials to device long-term operational stability. In this talk, he will discuss an overlooked aspect in perovskite materials, intragrain defects, and highlight their impact on the optoelectronic properties and devices' longevity.
Dr. Matthias Diethelm
Matthias is an R&D Scientist at Fluxim. His appointment at Fluxim follows a distinguished academic journey, most recently as a Postdoctoral Researcher at Empa and the University of Oxford, where he advanced key research in CIGS and perovskite photovoltaics. With a PhD from EPFL earned through research at Empa, Matthias has significantly contributed to our understanding of ion-influenced optoelectronics, OLED technologies and photovoltaics, demonstrated through numerous impactful publications.
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