n-CdS/n-GaAs voltage-enhanced photoanode

Abstract
We report an n‐CdS photoanode grown on an n‐GaAs substrate. The photovoltage at the n‐GaAs/n‐CdS junction in series with the CdS/electrolyte junction increases the solar‐cell efficiency by a factor of about 1.5 relative to a simple n‐CdS photoelectrochemical solar cell.