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Strong near-infrared upconversion luminescence of the Er3+/Y3+ co-doped YbVO4 phosphor for multimode optical temperature measurement.
- Source :
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Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy . Jan2025, Vol. 325, pN.PAG-N.PAG. 1p. - Publication Year :
- 2025
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Abstract
- [Display omitted] • YbVO 4 : Er3+/Y3+ phosphor exhibits strong upconversion NIR luminescence. • Defect bands enhance the upconversion NIR luminescence of YbVO 4 : Er3+/Y3+. • Multimode temperature measurement is realized in YbVO 4 : Er3+/Y3+. • The relative sensitivity is higher than most other optical thermometry materials. This study explored the enhancement of near-infrared emissions in YbVO 4 : Er3+ through Y3+ ion doping under a 980 nm laser excitation. The phosphor exhibits weak green emissions at 527 nm (2H 11/2 → 4I 15/2) and 553 nm (4S 3/2 → 4I 15/2), red emissions at 654 nm (4F 9/2 → 4I 15/2), and a strong near-infrared emission at 803 nm (4I 9/2 → 4I 15/2). Optimal doping concentration of Y3+ ion in YbVO 4 : 0.02 Er3+ was determined to be 0.1, resulting in a 7.6-fold enhancement of near-infrared luminescence. This enhancement is attributed to defect bands facilitating energy transfer from green and red levels to the near-infrared levels. Furthermore, a multi-mode temperature sensor based on YbVO 4 : Er3+/Y3+ was developed, offering four distinct temperature sensing modes: TCEL of 2H 11/2 /4S 3/2 , NTCEL of 2H 11/2 /4F 9/2 and 4S 3/2 /4F 9/2 , and single luminescence emission intensity of 4I 9/2 energy level. The sensor demonstrates maximum relative sensitivities of 1.17 % K−1 at 298 K, 0.66 % K−1 at 298 K, 0.41 % K−1 at 298 K and 1.29 % K−1 at 673 K. YbVO 4 : Er3+/Y3+ phosphor exhibits high temperature sensitivity, showcasing significant potential for optical temperature sensing applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13861425
- Volume :
- 325
- Database :
- Academic Search Index
- Journal :
- Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 180679269
- Full Text :
- https://doi.org/10.1016/j.saa.2024.125176