Preprint Article Version 1 This version not peer reviewed

Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing

Version 1 : Received: 17 January 2018 / Approved: 18 January 2018 / Online: 18 January 2018 (05:37:15 CET)

How to cite: Venturini, F.; Baumgartner, M.; Borisov, S.M. Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing. Preprints 2018, 2018010168 (doi: 10.20944/preprints201801.0168.v1). Venturini, F.; Baumgartner, M.; Borisov, S.M. Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing. Preprints 2018, 2018010168 (doi: 10.20944/preprints201801.0168.v1).

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 0 to 80 °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, enabling monitoring of temperature fluctuation in subsecond time domain.

Subject Areas

phosphor; optical sensor; temperature sensor; manganese, luminescence

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