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<p>A series of Er<sup>3+</sup>/Yb<sup>3+</sup> co-doped NaY(WO<sub>4</sub>)<sub>2</sub> (NYWO) phosphors are prepared by molten salt synthesis (MSS) with Na<sub>2</sub>SO<sub>4</sub> as solvent. The holding temperature, holding time, and solvent-to-solute mass ratio parameters are regulated. The structure, morphology, and luminescence properties of the samples were tested by XRD, SEM, and fluorescence spectrometers, respectively. The lamellar sample is prepared at 900℃ for 5&#xa0;h when solvent-to-solute is 3, which has the highest pure green upconversion luminescence (UCL) intensity under 980&#xa0;nm laser excitation. It is demonstrated that the UCL intensity of the samples prepared by MSS is higher than that of solid sintered samples. The maximum absolute sensitivity (S<sub>A</sub>) and relative sensitivity (S<sub>R</sub>) are 0.012184&#xa0;K⁻<sup>1</sup> at 507&#xa0;K and 0.01102&#xa0;K⁻<sup>1</sup> at 303&#xa0;K, respectively. These materials can be used for pure green luminescence displays and temperature sensing.</p>

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Pure green upconversion luminescence and temperature sensing of NaY(WO4)2:Er3+/Yb3+ prepared by molten salt method

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Meiling Li,
  • Yongze Cao,
  • Lihong Cheng,
  • Yuhan Fan,
  • Yichao Wang,
  • Xiangping Li,
  • Xizhen Zhang,
  • Baojiu Chen

摘要

A series of Er3+/Yb3+ co-doped NaY(WO4)2 (NYWO) phosphors are prepared by molten salt synthesis (MSS) with Na2SO4 as solvent. The holding temperature, holding time, and solvent-to-solute mass ratio parameters are regulated. The structure, morphology, and luminescence properties of the samples were tested by XRD, SEM, and fluorescence spectrometers, respectively. The lamellar sample is prepared at 900℃ for 5 h when solvent-to-solute is 3, which has the highest pure green upconversion luminescence (UCL) intensity under 980 nm laser excitation. It is demonstrated that the UCL intensity of the samples prepared by MSS is higher than that of solid sintered samples. The maximum absolute sensitivity (SA) and relative sensitivity (SR) are 0.012184 K⁻1 at 507 K and 0.01102 K⁻1 at 303 K, respectively. These materials can be used for pure green luminescence displays and temperature sensing.