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Technology

Perovskite-Silicon Tandem Solar Cells Exceeding 30% Efficiency

Quick fact

In 2024, a perovskite-silicon tandem cell reached an efficiency of 33.9%, shattering the long-standing 33.7% limit for single-junction silicon.

Why this is interesting

Solar panels you see on rooftops are typically around 20% efficient—but what if a single panel could convert over 30% of sunlight into electricity? That's exactly what has been achieved by stacking a mysterious material called perovskite on top of silicon.