In one line
Solar cell architecture stacking a perovskite layer atop silicon to break the single-junction efficiency limit.
What it means
Perovskite-silicon tandem cells stack a thin perovskite layer above a conventional crystalline silicon cell. The perovskite captures higher-energy blue light while silicon captures lower-energy red, pushing lab efficiency past 34% (vs ~26% single-junction silicon limit). First commercial modules from Oxford PV, Qcells, and LONGi reached 2 GW combined production capacity in 2026. Long-term stability remains the open commercial question.
Related terms
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