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SrY2S4 – a novel host lattice for up-conversion luminescence and high-sensitive optical thermometry.
- Source :
- CrystEngComm; 4/7/2024, Vol. 26 Issue 13, p1829-1836, 8p
- Publication Year :
- 2024
-
Abstract
- Lanthanide ion-doped up-conversion (UC) luminescent materials are highly coveted for their utility in diverse applications such as anti-counterfeiting, fluorescence labeling, and temperature sensing. Here, we attempt to adopt SrY<subscript>2</subscript>S<subscript>4</subscript> as a novel host lattice for UC luminescence and high-sensitive optical thermometry under near-infrared irradiation. The results show that the single Er<superscript>3+</superscript>-doped SrY<subscript>2</subscript>S<subscript>4</subscript> samples present their main emissions in green and red regions under 1550 and 980 nm excitations, which correspond to the H<subscript>11/2</subscript>/<superscript>4</superscript>S<subscript>3/2</subscript> → <superscript>4</superscript>I<subscript>15/2</subscript> and <superscript>4</superscript>F<subscript>9/2</subscript> → <superscript>4</superscript>I<subscript>15/2</subscript> transitions of Er<superscript>3+</superscript> ions, respectively. The green to red intensity ratio increases with the Er<superscript>3+</superscript> concentration under both 980 and 1550 nm excitations. The mechanisms of UC luminescence and energy transfer are further systematically investigated by UC spectra and fluorescence decay dynamics. Furthermore, the non-contact temperature sensing performance of the SrY<subscript>2</subscript>S<subscript>4</subscript>:10%Er<superscript>3+</superscript> sample is explored via employing fluorescence intensity ratio (FIR) technology. At an excitation of 980 nm, the maximum absolute sensitivity (S<subscript>A</subscript>) reaches 7.5 × 10<superscript>−3</superscript> K<superscript>−1</superscript> at 480 K. By utilizing a much safer excitation laser of 1550 nm, the maximum S<subscript>A</subscript> achieves 8.4 × 10<superscript>−3</superscript> K<superscript>−1</superscript> at 450 K, with a high and stable S<subscript>A</subscript> of more than 7.9 × 10<superscript>−3</superscript> K<superscript>−1</superscript> over a broad temperature range of 360–570 K. The relative sensitivity is 1.06% and 1.01% K<superscript>−1</superscript> under 980 and 1550 nm excitations, respectively. These results indicate that the ternary sulfide SrY<subscript>2</subscript>S<subscript>4</subscript> can be adopted as a novel host to achieve promising UC luminescence and thermal sensing performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 26
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 176219374
- Full Text :
- https://doi.org/10.1039/d3ce01284k