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RESEARCH PRODUCT
Yttrium-doped hematite photoanodes for solar water splitting: Photoelectrochemical and electronic properties
Tanel KäämbreTanel KäämbreMartins VanagsRainer PärnaJanis KleperisVambola KisandAndris ŠUtkaAndris ŠUtkaReinis Ignatanssubject
Materials scienceDopantProcess Chemistry and TechnologyDopingchemistry.chemical_element02 engineering and technologyYttriumHematite010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialschemistryChemical engineeringImpurityvisual_artMaterials ChemistryCeramics and Compositesvisual_art.visual_art_mediumWater splittingThin film0210 nano-technologyTransparent conducting filmdescription
Abstract We investigate yttrium-doped hematite thin-film photoelectrochemical properties and find yttrium incorporation to amply improve the performance as a photoanode for water splitting under visible light. We used the spray pyrolysis method to prepare a set of yttrium doped Fe2-xYxO3 (x = 0, 0.05, 0.10, 0.15, 0.2) thin films (thickness below 500 nm) on glass and transparent conductive oxide coated glass slides. Using a substitutional homovalent (Y3+) dopant, the effect on functionality is rationalised as a combined effect on the electronic structure and small polaron mobility from the lattice structure, impurity levels, lattice stability and variance in hybridisation. The photoelectrochemical response measurements indicate highest performance at Fe1.9Y0.1O3 composition.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-08-01 | Ceramics International |