• Scientists develop quantum-powered material to make hydrogen using just sun and water Excitonic quantum superlattices enable efficient solar-powered hydrogen production, offering a greener alternative to fossil fuels. • A team of researchers at the University of Michigan has developed quantum materials that could revolutionize hydrogen fuel production using only sunlight and water. • In a breakthrough, the team addressed challenges in photocatalytic water splitting, a method for producing clean hydrogen. • In tests, their excitonic quantum superlattices demonstrated impressive efficiency when it came to clean hydrogen production. • Excitonic quantum superlattices Hydrogen fuel holds immense promise for reducing greenhouse gas emissions, as it emits only water vapor when burned. • It could one day power heavy-duty vehicles like trucks, trains, and ships, as well as support industrial heating and decentralized electricity systems.
Article Summaries:
- Scientists at the University of Michigan have engineered excitonic quantum superlattices-ultra‑thin stacks of gallium nitride and indium gallium nitride-to split water into hydrogen and oxygen using only sunlight and water. The quantum‑confined Stark effect extends the lifetime of photogenerated excitons, improving charge separation and enabling efficient photocatalysis. In laboratory tests, the material achieved a solar‑to‑hydrogen efficiency of 3.16 % under concentrated light and 1.64 % in outdoor demonstrations with 204‑fold sunlight intensity. While still below commercial thresholds, the results demonstrate the potential of quantum‑structured materials for greener hydrogen production. The study appears in Nature Energy.
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