Voltage-Dependent Stability and Degradation Pathways in Perovskite Solar Cells
Howe, Benjamin
Howe, Benjamin
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Abstract
The stability and degradation of perovskite solar cells depend strongly on operating voltage, but the role of electrical bias remains unclear. Different bias conditions, like maximum power point and short-circuit, may promote ion migration and interfacial charge accumulation, with consequences for both recoverable performance losses and irreversible device degradation. In this work, we investigate how controlled bias switching can be used to distinguish reversible ionic redistribution effects from permanent performance loss. Preliminary results show bias-dependent differences in T80 lifetimes. Photoluminescence voltage sweeps provide complementary evidence for correlations between ionic dynamics, hysteresis, and long-term stability. Ongoing impedance spectroscopy, physics-based modeling, and machine learning classification of spectra aim to provide a framework for interpreting these effects.
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Date
1/1/2026
Student Status
Graduate Student
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Poster
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Physics
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College of Engineering and Mathematical Sciences
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Physical Science