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Hydrogen sensing by NKN thin film with high dielectric constant and ferroelectric property
Ishinomaki Senshu University.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
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2005 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 108, no 1-2, 490-495 p.Article in journal (Refereed) Published
Abstract [en]

Hydrogen sensing properties of sodium potassium niobate NaxKyNbOz (NKN) thin films were studied. The NKN thin films were prepared by reactive rf magnetron sputtering. NKN is a ferroelectric material with high dielectric constant. The polarization increases in hydrogen ambient and decreases in oxygen ambient. The conductivity of the NKN film in hydrogen ambient is higher than in oxygen ambient, and these changes are reversible. The threshold voltage of the current–voltage (IV) characteristics depends on the hydrogen concentration, and a large response of 3.3 V was obtained.

Place, publisher, year, edition, pages
2005. Vol. 108, no 1-2, 490-495 p.
Keyword [en]
NKN thin films, Ferroelectric property, Hydrogen sensing
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-11290DOI: 10.1016/j.snb.2004.11.025OAI: oai:DiVA.org:uu-11290DiVA: diva2:39058
Available from: 2007-08-27 Created: 2007-08-27 Last updated: 2017-12-11Bibliographically approved

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Wingqvist, Gunilla

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