In-Situ Photostability Analysis of Perovskite Solar Cells by Time-Evolving Photoluminescence Imaging

作者：Jackson Schall, Amy E. Louks, Goutam Paul, Nikita S. Dutta, Steve Johnston, Chun-Shen Jiang, Axel F. Palmstrom, Mowafak Al‐Jassim, Dana B. Kern · 年份：2023 · DOI：10.1109/pvsc48320.2023.10359669 · 被引用次数：4 · 研究领域：Perovskite Materials and Applications、Chalcogenide Semiconductor Thin Films、Quantum Dots Synthesis And Properties

In this work we investigate reversible metastabilities and irreversible degradation due to light soaking of triplecation mixed-halide perovskite p-i-n solar cells. We use spatially resolved luminescence imaging to document the spatial inhomogeneities that exist even in high-performance devices with median efficiencies >20%. We monitor light-soaking degradation in-situ using time-evolving photoluminescence images, electro-luminescence images, and transient photovoltage. Post-stress measurements of external quantum efficiency and Kelvin-probe force microscopy suggest that long-term degradation primarily affects electrode interfaces rather than the absorber layer.