We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Upconversion Spectral Modulation and Temperature Sensing of NaYF<sub>4</sub>:Yb<sup>3+</sup>/Ho<sup>3+</sup>/Tm<sup>3+</sup>/Gd<sup>3+</sup> Nanorods with Resistance to Thermal Quenching.
- Authors
Zhou, Wei; Yang, Jian; Jin, Xiangliang
- Abstract
Upconversion (UC) nanomaterials are of interest to researchers because of their excellent photostability, effective quantum efficiency and optical temperature dependence. However, most UC nanomaterials are thermally quenched, which causes optical nanothermometers to be susceptible to their own thermal effects, reducing the accuracy of temperature measurements. In this paper, NaYF4:Yb3+/Ho3+/Tm3+/Gd3+ nanorods with UC luminescence and resistance to thermal quenching are prepared through a simple hydrothermal method. The UC luminescence intensity of NaYF4:Yb3+/Ho3+/Tm3+/Gd3+ nanorods is adjusted by doping with Tm3+ ions. The luminescence intensity at each location shows different temperature dependence as the temperature increases. When the temperature reaches 573 K, the integrated luminescence intensity is three times that at 293 K. At the same time, the intensity at all temperature points in the range of 293–573 K is greater than the intensity at 293 K, which shows that the nanorods have excellent resistance to thermal quenching. In addition, the relative sensitivity (Sr) of LIR(I696/I476), LIR(I696/I541), LIR(I696/I646), LIR(I696/I802), and LIR(I541/I476) is investigated based on the luminescence intensity ratio (LIR) technique. The Sr of LIR(I696/I802) is found to have larger values in the low-temperature range, while Sr of LIR(I696/I476) has larger values in the high-temperature range. The use of LIR(I696/I802) and LIR(I696/I476) in separate temperature bands allows Sr to reach 0.93–1.67 %K−1 in the range of 293–573 K, confirming that the nanorods have high Sr over a wide temperature interval. This study indicates that the NaYF4:Yb3+/Ho3+/Tm3+/Gd3+ nanorods are promising candidates for optical thermometers with high sensitivity, wide temperature range, and resistance to thermal quenching.
- Subjects
YTTERBIUM; THERMAL resistance; PHOTON upconversion; NANORODS; QUANTUM efficiency; TEMPERATURE
- Publication
Journal of Electronic Materials, 2024, Vol 53, Issue 5, p2514
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-024-10957-6