Mn4+-Doped magnesium titanate-a promising phosphor for self-referenced optical temperature sensing

Francesca Venturini, Michael Baumgartner, Sergey M. Borisov

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Phosphors based on magnesium titanate activated with Mn4+ 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 Mg2TiO4 are investigated for different Mn4+ 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.

Original languageEnglish
Article number668
JournalSensors (Switzerland)
Volume18
Issue number2
DOIs
Publication statusPublished - 24 Feb 2018

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Keywords

  • Luminescence
  • Manganese
  • Optical sensor
  • Phosphor
  • Temperature sensor

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

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