Luminescence temperature sensing based on spectral characteristic of CeF3-TbF3-YF3 nanoparticles

• Published in: 2024 International Conference Laser Optics (ICLO) p. 391
• Main Authors: Kalinichenko, S.I., Nizamutdinov, A.S., Pudovkin, M.S.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.07.2024
• Subjects: Ce3+/Tb3; Energy exchange; Ions; Luminescence; Luminescence thermometry; Nanoparticles; rare-earth ions; ratiometric temperature sensing; Temperature; Temperature dependence; Temperature sensors
• ISSN: 2642-5580
• DOI: 10.1109/ICLO59702.2024.10624310

When \mathrm{Ce}^{3+} ions are excited, intense peaks of luminescence of \mathbf{T b}^{3+} ions are observed, which indicates an obvious energy transfer from \mathrm{Ce}^{3+} to \mathrm{Tb}^{3+}. It has been shown that the ratio of the intensities of the luminescence bands \mathrm{Ce}^{3+} to \mathbf{T b}^{3+} is a decreasing function depending on temperature. The ratio of the intensities of the luminescence bands of \mathrm{Ce}^{3+} and \mathrm{Tb}^{3+} ions (in the range of 303-523 \mathrm{~K}) was used as a temperature-dependent parameter. The rate of decrease in the LIR function decreases with increasing temperature for different concentrations of \mathbf{T b}^{\mathbf{3 +}} ions. It has been suggested that this phenomenon is due to the presence of two processes populating the { }^{5} \mathrm{D}_{4} state of the \mathbf{T b}^{3+} ion. There are a multiphonon non-radiation transition from the { }^{5} D_{3} to { }^{5} D_{4} level of the \mathbf{T b}^{3+} ion (more temperature-dependent) and cross-relaxation between \mathbf{T b}^{3+} ions, which was estimated as less temperature-dependent process.