Carborane-based electron transport material challenges buckminsterfullerene in tandem solar cells

By Chloe Wallace2026-09-09T08:23:00

Illustration shows a carborane-based molecule on a PbI2-terminated FAPbI3 perovskite surface

Source: © Lea Zimmermann/HZB

By improving electron extraction and reducing parasitic light absorption, new material boosts tandem cell efficiency, but not yet device longevity

Researchers have developed a carborane-based electron transport material for perovskite/silicon tandem solar cells that offers an alternative to the field’s default choice, buckminsterfullerene (C₆₀).