One-year outdoor testing reveals degradation paths in perovskite tandem solar cells - pv magazine Global

Researchers from TNO and Fraunhofer ISE ran a 1-year outdoor test of perovskite/perovskite/silicon triple-junction solar cells and found a clear efficiency decline from 17–18% to 13–14% driven by multi-stage degradation. The main failure mechanisms were voltage loss, encapsulation delamination, and UV/thermal-induced interface and transport-layer degradation rather than intrinsic absorber instability.

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