Temperature sensing using a Cr:ZnGa2O4 new phosphor

S. K. Sharma; E. Glais; M. Pellerin; C. Chaneac; B. Viana

doi:10.1117/12.2219990

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27 February 2016 Temperature sensing using a Cr:ZnGa₂O₄ new phosphor

S. K. Sharma, E. Glais, M. Pellerin, C. Chaneac, B. Viana

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Proceedings Volume 9749, Oxide-based Materials and Devices VII; 974922 (2016) https://doi.org/10.1117/12.2219990
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

The luminescence emission of a thermographic phosphor based on trivalent chromium doped ZGO (ZnGa₂O₄) bulk as well as nanoparticles is here reported. This material has a strong temperature dependence on the optical features such as ratio of their emission bands, bandwidths, bands position as well as the lifetime decay of the Cr³⁺. This makes this material well suitable as temperature sensor. ZnGa₂O₄ (ZGO), a normal spinel, exhibits a high brightness persistent luminescence, when doped with Cr³⁺ ions and shows an emission spectrum centered at 695 nm. At the nanometric scale, ZGO is used for in vivo imaging with a better signal to background ratio than classical fluorescent NIR probes. In this work we investigate the ability of the host to be a new thermographic phosphor. Several optical features are investigated in a broad temperature range (10 K-700 K). A comparison between bulk material and nanoparticles is introduced. The obtained results could be used to determine the optimal design parameters for sensor development.

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S. K. Sharma, E. Glais, M. Pellerin, C. Chaneac, and B. Viana "Temperature sensing using a Cr:ZnGa₂O₄ new phosphor", Proc. SPIE 9749, Oxide-based Materials and Devices VII, 974922 (27 February 2016); https://doi.org/10.1117/12.2219990

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