New visible light absorbing materials for solar fuels, Ga(Sbx)N1-x.
basic_science · Level V
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- Record sourced from PubMed, PMID 24536005.
- Also identified by DOI 10.1002/adma.201305083.
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Abstract
A novel visible-light-absorbing dilute alloy, Ga(Sbx)N1-x is synthesized by metal organic chemical vapor deposition (MOCVD) for solar hydrogen production. Significant bandgap reduction of GaN, from 3.4 eV to 1.8 eV, is observed, with a low (2%) incorporation of antimonide, and the lattice expansion is in agreement with our first-principles calculations. The band edges of Ga(Sbx)N1-x are found to straddle the water redox potentials showing excellent suitability for solar water splitting.