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- W2059098954 abstract "Contemporary models are shown to significantly underestimate the attainable efficiency of solar energy conversion to water splitting, and experimentally a cell containing illuminated AlGaAs/Si RuO2/Ptblack is demonstrated to evolve H2 and O2 at record solar-driven water electrolysis efficiency. Under illumination, bipolar configured Al0.15Ga0.85As(Eg=1.6eV) and Si(Eg=1.1eV) semiconductors generate open circuit and maximum power photopotentials of 1.57 and 1.30 V, well suited to the water electrolysis thermodynamic potential:H2O→H2+1/2O2;EH2O°=EO2−EH2;EH2O°(25°C)=1.229V.The EH2O°/photopotential matched semiconductors are combined with effective water electrolysis O2 or H2 electrocatalysts, RuO2 or Ptblack. The resultant solar photoelectrolysis cell drives sustained water splitting at 18.3% conversion efficiencies. Alternate dual bandgap systems are calculated to be capable of attaining over 30% solar photoelectrolysis conversion efficiency." @default.
- W2059098954 created "2016-06-24" @default.
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- W2059098954 date "2001-07-01" @default.
- W2059098954 modified "2023-10-14" @default.
- W2059098954 title "Over 18% solar energy conversion to generation of hydrogen fuel; theory and experiment for efficient solar water splitting" @default.
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- W2059098954 doi "https://doi.org/10.1016/s0360-3199(00)00133-6" @default.
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