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Abstract <p>Ce<sub>0.50</sub>Y<sub>0.44–<i>x</i></sub>Tb<sub>0.06</sub>Eu<sub><i>x</i></sub>F<sub>3</sub> nanoparticles (<i>x</i> = 0, 0.015, 0.03, 0.06) of single-phase hexagonal structure (CeF<sub>3</sub> matrix) are synthesized via co-precipitation. The average particle size is found to be 14.5 nm. Characteristic emission bands are observed upon excitation at 266 nm: Ce<sup>3+</sup> (5<i>d</i> → 4<i>f</i> transition), Tb<sup>3+</sup> (<sup>5</sup><i>D</i><sub>4</sub>&#xa0;→ <sup>7</sup><i>F</i><sub><i>J</i></sub>, 480–620 nm), and Eu<sup>3+</sup> (<sup>5</sup><i>D</i><sub>0</sub> → <sup>7</sup><i>F</i><sub><i>J</i></sub>, 570–700 nm). The temperature dependence of integral intensities and their ratios (Ce<sup>3+</sup>/Tb<sup>3+</sup>, Ce<sup>3+</sup>/Eu<sup>3+</sup>, Tb<sup>3+</sup>/Eu<sup>3+</sup>) are studied in the 80–320 K range of temperatures. The highest sensitivity toward temperature is obtained for ratio Ce<sup>3+</sup>/Eu<sup>3+</sup> at Eu<sup>3+</sup> concentration <i>x</i> = 0.03. Kinetic studies of Tb<sup>3+</sup> luminescence confirm temperature-induced quenching due to enhanced phonon-assisted transfer of energy to Eu<sup>3+</sup>.</p>

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Mechanisms of the Temperature Dependence of Luminescence Characteristics of CeF3–YF3 Nanoparticles Activated by Ion Pairs Tb3+/Eu3+

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • V. A. Fedorova,
  • M. S. Pudovkin

摘要

Abstract

Ce0.50Y0.44–xTb0.06EuxF3 nanoparticles (x = 0, 0.015, 0.03, 0.06) of single-phase hexagonal structure (CeF3 matrix) are synthesized via co-precipitation. The average particle size is found to be 14.5 nm. Characteristic emission bands are observed upon excitation at 266 nm: Ce3+ (5d → 4f transition), Tb3+ (5D4 → 7FJ, 480–620 nm), and Eu3+ (5D0 → 7FJ, 570–700 nm). The temperature dependence of integral intensities and their ratios (Ce3+/Tb3+, Ce3+/Eu3+, Tb3+/Eu3+) are studied in the 80–320 K range of temperatures. The highest sensitivity toward temperature is obtained for ratio Ce3+/Eu3+ at Eu3+ concentration x = 0.03. Kinetic studies of Tb3+ luminescence confirm temperature-induced quenching due to enhanced phonon-assisted transfer of energy to Eu3+.