Researchers at the University of Basel have engineered a novel molecule capable of storing four electrical charges—two positive and two negative—using natural sunlight rather than high-powered lasers. Composed of five linked units (a central light‐absorbing chromophore flanked by electron‐donating and ‐accepting moieties), this molecule accumulates charges via a two-step light exposure, remaining stable long enough to drive chemical fuel‐forming reactions. This innovation marks a major leap toward carbon‐neutral solar fuels like hydrogen and methanol, critical for aviation and heavy industry decarbonization.
Key Highlights
Quadra‐charge storage: Molecule stores 2 electrons and 2 holes under sunlight conditions, doubling typical two‐charge systems.
Five‐unit design: Central chromophore initiates charge separation, flanked by donor and acceptor units for efficient charge routing.
Two‐step excitation: Sequential light absorption steps accumulate charges, preventing recombination and enabling long‐lived charge states.
Artificial photosynthesis enabler: Provides foundational chemistry for solar‐driven water splitting and CO₂ reduction to green fuels.
Applications: Ideal for hard-to‐electrify sectors (aviation, shipping, heavy industry) requiring energy‐dense fuels and 24/7 power.