Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing
1
Institute of Applied Mathematics and Physics, Zurich University of Applied Sciences, Winterthur 8401, Switzerland
2
Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
*
Authors to whom correspondence should be addressed.
Sensors 2018, 18(2), 668; https://doi.org/10.3390/s18020668
Received: 17 January 2018
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Revised: 18 February 2018
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Accepted: 22 February 2018
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Published: 24 February 2018
(This article belongs to the Special Issue Lab on Fiber Optrodes for Chemical and Biological Sensing: Recent Trends and Advances)
Phosphors based on magnesium titanate activated with Mn ions are of great interest because, when excited with blue light, they display a strong red-emitting luminescence. They are characterized by a luminescence decay which is strongly temperature dependent in the range from −50 C to 150 C, making these materials very promising for temperature sensing in the biochemical field. In this work, the optical and thermal properties of the luminescence of Mg TiO are investigated for different Mn doping concentrations. The potential of this material for temperature sensing is demonstrated by fabricating a fiber optic temperature microsensor and by comparing its performance against a standard resistance thermometer. The response of the fiber optic sensor is exceptionally fast, with a response time below 1 s in the liquid phase and below 1.1 s in the gas phase.
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Keywords:
phosphor; optical sensor; temperature sensor; manganese, luminescence
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MDPI and ACS Style
Venturini, F.; Baumgartner, M.; Borisov, S.M. Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing. Sensors 2018, 18, 668. https://doi.org/10.3390/s18020668
AMA Style
Venturini F, Baumgartner M, Borisov SM. Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing. Sensors. 2018; 18(2):668. https://doi.org/10.3390/s18020668
Chicago/Turabian StyleVenturini, Francesca, Michael Baumgartner, and Sergey M. Borisov. 2018. "Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing" Sensors 18, no. 2: 668. https://doi.org/10.3390/s18020668
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