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Phase control of iron oxides grown in nano-scale structures on FTO and Si(100): Hematite, maghemite and magnetite
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
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2015 (English)In: Vacuum, ISSN 0042-207X, E-ISSN 1879-2715, Vol. 117, 85-90 p.Article in journal (Refereed) Published
Abstract [en]

We demonstrate that iron oxide in the form of hematite, suitable as absorption material in photo-electrochemical cells, can be produced by pulsed chemical vapour deposition. By choosing carbon monoxide or nitrogen as carrier gases in the process the phase and granularity of the grown material can be controlled. The choice of carrier gas affect the decomposition rate of iron pentacarbonyl used as iron precursor. The iron oxide phase is also dependent on the chosen substrate, here fluorine doped tin oxide and crystalline silicon have been used. Regardless of the substrate nitrogen yields hematite, whereas carbon monoxide gives, magnetite on Si and maghemite on fluorine doped tin oxide. A combination of Raman spectroscopy, X-ray diffraction, and hard X-ray photoelectron spectroscopy were used for characterization of the crystalline phase and chemical composition in the films. Scanning electron microscopy were used to visualise the deposited films' nano-structure.

Place, publisher, year, edition, pages
2015. Vol. 117, 85-90 p.
Keyword [en]
Hard X-ray photoelectron spectroscopy, HAXPES, Hematite, Thin films, Pulsed chemical vapour deposition, PEC
National Category
Physical Sciences Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-257638DOI: 10.1016/j.vacuum.2015.03.037ISI: 000356114500018OAI: oai:DiVA.org:uu-257638DiVA: diva2:840706
Available from: 2015-07-09 Created: 2015-07-06 Last updated: 2017-12-04Bibliographically approved

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Johansson, Fredrikvon Fieandt, LinusBoman, MatsLindblad, Andreas

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