Yttrium-Doped Hematite Photoanodes for Solar Water Splitting: Photoelectrochemical and Electronic Properties
Ceramics International
2018
Tanel Kaambre,
Mārtiņš Vanags,
Rainer Pärna,
Vambola Kisand,
Reinis Ignatāns,
Jānis Kleperis,
Andris Šutka
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.
Atslēgas vārdi
Hematite; Y3+ doping; Photoelectrochemical; Mott-Schottky analysis
DOI
10.1016/j.ceramint.2018.04.147
Hipersaite
https://www.sciencedirect.com/science/article/pii/S0272884218310216
Kaambre, T., Vanags, M., Pärna, R., Kisand, V., Ignatāns, R., Kleperis, J., Šutka, A. Yttrium-Doped Hematite Photoanodes for Solar Water Splitting: Photoelectrochemical and Electronic Properties. Ceramics International, 2018, Vol.44, Iss.11, 13218.-13225.lpp. ISSN 0272-8842. Pieejams: doi:10.1016/j.ceramint.2018.04.147
Publikācijas valoda
English (en)