Temperature sensing using a Cr:ZnGa2O4 new phosphor

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

doi:10.1117/12.2219990

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

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

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.

Citation Download Citation

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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