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Nguyen, Chi
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Publications (3/3 displayed)
- 2024The usability of the Judd-Ofelt theory for luminescent thermometry using Eu3+-doped phosphate glasscitations
- 2024Monitoring decomposition of Eu3+ doped LaPO4 nanocrystals in glass using Eu3+ as an optical probe for applications in temperature sensingcitations
- 2022The usability of the Judd-Ofelt theory for luminescent thermometry using Eu3+-doped phosphate glasscitations
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article
Monitoring decomposition of Eu3+ doped LaPO4 nanocrystals in glass using Eu3+ as an optical probe for applications in temperature sensing
Abstract
<p>The methods to directly introduce crystals of known chemistry, size, and optical properties into a glass matrix are useful to circumvent some limitations related to the control of the growth of crystalline phases in glass-ceramics. The emission spectrum of LaPO<sub>4</sub>:Eu<sup>3+</sup> is characteristic for highly symmetrical coordination of Eu<sup>3+</sup> and very distinct from the emission spectrum of Eu<sup>3+</sup> in amorphous host, which allows for its application as an optical probe. Here, Eu<sup>3+</sup> - doped LaPO<sub>4</sub> crystals were prepared using solid state reaction and added into various phosphate glass melt before quenching. From the changes in the micro-luminescence spectra, the decomposition occurs along with the diffusion of the Eu<sup>3+</sup> ions into the glass confirming that the measurement of the micro-luminescence allows one to precisely track the crystal's decomposition inside the composite. It is demonstrated, for the first time to our knowledge, that the thermometric sensitivity of the Eu<sup>3+</sup> ions can be enhanced by adding the LaPO<sub>4</sub>:Eu<sup>3+</sup> crystals into phosphate fluoride glasses due to special separation of the crystallites during the composite preparation and also to the reduction of the self-absorption of the <sup>5</sup>D<sub>1</sub>→<sup>7</sup>F<sub>1</sub> emission. The composite material is promising for applications in temperature sensing.</p>