BBCNEWS The Engineers August 21, 2021 12:37:00
In different regions and stack these materials on top of each other. now, this stacking of solar cells on top of each other we call multi—junctions, and the simplest multi—junction is a tandem cell, two solar cells on top of each other. and the perovskite we tune to match perfectly silicon. it absorbs only the visible light and we let the silicon absorb all the infrared. and in doing that we actually fundamentally improve the efficiencies. if we made a perfect perovskite on silicon tandem cell, that would top out at about 45%. so we've fundamentally lifted the ceiling. and if we went one s...