EquipmentUp to date · Jan 15, 2026
Tandem Solar Cell
A multi-junction solar cell that stacks two or more absorber layers to capture different parts of the solar spectrum. Perovskite-silicon tandems are the most promising near-term technology.
Why It Matters
Tandem cells break through silicon's ~29% theoretical efficiency limit. Commercial tandem modules at 28-30% efficiency could mean 30% more power from the same roof area.
Related Terms
Perovskite Solar Cell
An emerging photovoltaic technology using perovskite-structured compounds (typically methylammonium lead halides) as the light-absorbing layer. Lab efficiencies exceed 26%.
Module Efficiency
The percentage of sunlight that a solar panel converts into electricity. Modern panels range from 15-22% efficient.