Dy<sup>3+</sup> and Mn<sup>4+</sup> Ions Co-Doped Stannate Phosphors for Applications in Dual-Mode Optical Thermometry
In order to break through the limitations of the application of traditional temperature measurement technology, non-contact optical temperature sensing material with good sensitivity is one of the current research hotspots. Herein, a series of Dy<sup>3+</sup> and Mn<sup>4+</sup&...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/7/1569 |
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| Summary: | In order to break through the limitations of the application of traditional temperature measurement technology, non-contact optical temperature sensing material with good sensitivity is one of the current research hotspots. Herein, a series of Dy<sup>3+</sup> and Mn<sup>4+</sup> co-doping Mg<sub>3</sub>Ga<sub>2</sub>SnO<sub>8</sub> fluorescent materials were prepared successfully, and the crystal structure, phase purity, and morphology of the synthesized phosphors were comprehensively investigated, as well as their photoluminescence properties, energy transfer, and high-temperature thermal stability. The two pairs of independent thermally coupled energy levels of Dy<sup>3+</sup> ions and Mn<sup>4+</sup> ions in Mg<sub>3</sub>Ga<sub>2</sub>SnO<sub>8</sub> are utilized to realize the dual-mode optical temperature detection with excellent performance. On the one hand, based on the different ionic energy level transitions of <sup>4</sup>F<sub>9/2</sub>→<sup>6</sup>H<sub>13/2</sub> and <sup>2</sup>E<sub>g</sub>→<sup>4</sup>A<sub>2g</sub> responding differently to temperature, two emission bands of 577 nm and 668 nm were chosen to construct the fluorescence intensity ratio thermometry, and the maximum sensitivity of 1.82 %K<sup>−1</sup> was achieved at 473 K. On the other hand, based on the strong temperature dependence of the lifetime of Mn<sup>4+</sup> in Mg<sub>3</sub>Ga<sub>2</sub>SnO<sub>8</sub>:0.06Dy<sup>3+</sup>,0.009Mn<sup>4+</sup>, fluorescence lifetime thermometry was constructed and a maximum sensitivity of 2.75 %K<sup>−1</sup> was achieved at 473 K. Finally, the Mg<sub>3</sub>Ga<sub>2</sub>SnO<sub>8</sub>: 0.06Dy<sup>3+</sup>,0.009Mn<sup>4+</sup> sample realizes dual-mode optical temperature measurement with high sensitivity and a wide temperature detection range, indicating that the sample has promising applications in optical temperature measurement. |
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| ISSN: | 1420-3049 |