Kazan (Volga region) Federal University, KFU
KAZAN
FEDERAL UNIVERSITY
 
CEF3-TBF3-YF3 NANOPARTICLES FOR RATIOMETRIC TEMPERATURE SENSING
Form of presentationArticles in international journals and collections
Year of publication2024
Языканглийский
  • Kalinichenko Svetlana Igorevna, author
  • Nizamutdinov Aleksey Sergeevich, author
  • Pudovkin Maksim Sergeevich, author
  • Bibliographic description in the original language Pudovkin M. S., Kalinichenko S. I., Nizamutdinov A. S. CeF3-TbF3-YF3 nanoparticles for ratiometric temperature sensing // Optical Materials. – 2024. – T. 148. – S. 114831. https://doi.org/10.1016/j.optmat.2024.114831.
    Annotation The Ce0.5Y0.5-XTbXF3 (X = 0.01, 0.02, 0.05, 0.1, and 0.5) nanoparticles demonstrated a single-phase hexagonal structure corresponding to CeF3 host. The average diameter was 15 ? 1 nm. Under Ce3+ excitation at 266 nm, the luminescence peaks of (5d – 4f) Ce3+ and 5D4 – 4FJ (J = 6, 5, 4, and 3) Tb3+ were observed. The emission peaks from 5D3 level of Tb3+ were not observed. We took the luminescence integrated intensity ratio (LIR) of Ce3+ and Tb3+ peaks as a temperature-dependent parameter (303–523 K range). The LIR functions decay with the temperature increase. Indeed, with the temperature rise, the depopulation rate of Ce3+ excited state by Tb3+ becomes higher (phonon-assisted process). Thus, the ICe/ITb decreases. However, the rate of the LIR decay decreases with the increase of Tb3+ concentration. It was suggested, that this phenomenon is related to the presence of two competing processes populating the 5D4 state of Tb3+. There are phonon-assisted non-radiate transition from 5D3 to 5D4 of Tb3+ and cross-relaxation between Tb3+ ions, which was considered less temperaturedependent. The contribution of less temperature-dependent cross-relaxation process to the population of 5D4 increases with the Tb3+ concentration increase compared to 5D3 – 5D4 non-radiative transition. More significant contribution of the cross-relaxation leads to the decrease in the LIR descent rate. The maximum Sa and Sr values were 0.19 K-1 and 1.74 %/K at 303 K, respectively.
    Keywords Keywords: Luminescent thermometry LIR Ratiometric temperature sensing Ce3+/Tb3+
    The name of the journal Optical Materials
    URL https://doi.org/10.1016/j.optmat.2024.114831.
    Please use this ID to quote from or refer to the card https://repository.kpfu.ru/eng/?p_id=293705&p_lang=2
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