Ultraviolet Upconversion Emission of CaAl<sub>2</sub>SiO<sub>6</sub> Polycrystals Doped with Pr<sup>3+</sup> Ions
The spectroscopic properties of Pr<sup>3+</sup> ions in the aluminosilicate matrix were investigated for the first time. Synthesis of CaAl<sub>2</sub>SiO<sub>6</sub> (CASO) polycrystals doped with Pr<sup>3+</sup> ions was carried out using the sol–gel...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/14/2944 |
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| Summary: | The spectroscopic properties of Pr<sup>3+</sup> ions in the aluminosilicate matrix were investigated for the first time. Synthesis of CaAl<sub>2</sub>SiO<sub>6</sub> (CASO) polycrystals doped with Pr<sup>3+</sup> ions was carried out using the sol–gel method. The crystalline structures have been confirmed with XRD measurement. The absorption, excitation, emission spectra, and time decay profiles of the praseodymium (III) ions were measured and analyzed. It was found that upon excitation with visible light, this material exhibits emission mainly in the UVC region, via an upconversion emission process. The Stokes emission in the visible range is observed mainly from the <sup>3</sup>P<sub>0</sub> and <sup>1</sup>D<sub>2</sub> energy levels. The <sup>1</sup>D<sub>2</sub>→<sup>3</sup>H<sub>4</sub> emission is very stable even at very high temperatures. The studied aluminosilicate phosphors possess characteristics that confirm their potential in upconversion emission applications. |
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| ISSN: | 1420-3049 |