Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.566
Publication date: 16th December 2024
One of the major drawbacks of lead halide perovskites and an obstacle to their commercialization is their lack of long-term chemical and structural stability. When exposed to external stressors, these materials either chemically degrade or structurally transform into other crystal phases. Understanding the end-of-life mechanisms of perovskites is essential for developing better strategies to prevent their degradation and enable reversible process for re-manufacturing thin films and devices. I investigated the synergistic role of humidity and oxygen in the degradation pathway of lead halide perovskites used in solar cells. This was achieved using synchrotron-based in-situ grazing-incidence wide-angle X-ray scattering (GIWAXS) and X-ray photoelectron spectroscopy (XPS) (Hidalgo et al., J. Am. Chem. Soc. 2023). This initial work highlighted the interplay between structural changes and surface chemical reactions in lead halide perovskites, leading to the evaluation of a surface passivation strategy and compositional engineering, resulting in more durable lead halide perovskites for photovoltaic applications.
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