Gradient doping of phosphorus in Fe₂O₃ nanoarray photoanodes for enhanced charge separation.

ABSTRACT: Hematite (α-Fe₂O₃) is a promising candidate for solar-to-hydrogen energy conversion. However, the low carrier mobility and extremely high charge recombination rate limit the practical application of hematite in solar water splitting. This paper describes the fabrication of a Fe₂O₃ photoanode with gradient incorporation of phosphorus (P) employing a facile dipping and annealing method to improve the charge separation for enhanced photoelectrochemical water oxidation. This gradient P incorporation increases the width of band bending over a large region in Fe₂O₃, which is crucial for promoting the charge separation efficiency in the bulk. Although both gradient and homogeneous P-incorporated Fe₂O₃ samples

SUBMITTER: Luo Z 

PROVIDER: S-EPMC5304616 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature