Self-referenced luminescence thermometry with Sm 3+ doped TiO 2 nanoparticles

The performance of Sm 3+ doped TiO 2 nanoparticles for luminescence temperature sensing was tested over a temperature range from room to 110 °C. The Sm 3+ ions were incorporated into TiO 2 nanocrystals using hydrolytic sol−gel route. Microstructural characterization of the obtained material was performed using transmission electron microscopy and x-ray diffraction measurements. Luminescence emission spectra of Sm 3+ doped TiO 2 nanoparticles consists of two distinct spectral regions: the high energy region associated with the trap emission of the TiO 2 host, and the low energy region with well-resolved emission peaks of the Sm 3+ ions. The ratio between Sm 3+ emission and TiO 2 trap emission shows strong temperature dependence, and is tested for temperature sensing. The relative sensor sensitivity was found to be higher than 1% °C −1 over given temperature range with the ...

M D Drami?anin, ? Anti?, S ?ulubrk, S P Ahrenkiel and J M Nedeljkovi?

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