Highly-oriented Fe2O3/ZnFe2O4 nanocolumnar heterojunction with improved charge separation for photoelectrochemical water oxidation

Abstract

This paper describes the design and synthesis of a heterojunction photoanode composed of highly-oriented Fe₂O₃/ZnFe₂O₄ nanocolumnar arrays with a well-defined morphology by reactive ballistic deposition and atomic layer deposition. This specific structure enhances the charge separation at the Fe₂O₃/ZnFe₂O₄ interface, leading to an improved photoelectrochemical performance for water oxidation.