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<p>A novel series of yellow-emitting silicate phosphors, NaY<sub>1−x</sub>SiO<sub>4</sub>: xDy<sup>3+</sup> (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05), was synthesized via a high-temperature solid-state reaction method. The phase composition, crystal structure, concentration quenching behavior, thermal stability, photoluminescence lifetime, and CIE chromaticity coordinates of the samples were systematically investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectroscopy, high-temperature PL measurements, and fluorescence decay analysis. Under 348&#xa0;nm ultraviolet excitation, the phosphors exhibited strong yellow emission. The luminescence intensity varied with Dy<sup>3+</sup> doping concentration, showing concentration quenching at x = 0.03. Based on Dexter’s theory, the quenching mechanism was attributed to electric dipole–dipole interactions among Dy<sup>3+</sup> ions. Furthermore, the thermal stability and chromaticity of the NaY<sub>0.97</sub>SiO<sub>4</sub>: 0.03Dy<sup>3+</sup> sample were evaluated. At 473&#xa0;K, the emission intensity retained approximately 86.21% of its initial value at room temperature, and the corresponding CIE chromaticity coordinates were (0.3377, 0.3556), located in the yellow region. These results suggest that NaY<sub>1−x</sub>SiO<sub>4</sub>:xDy<sup>3+</sup> phosphors are promising candidates for applications in display devices and white light-emitting diodes (W-LEDs).</p>

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Synthesis and luminescence properties of novel yellow-emitting NaYSiO4:Dy3+ phosphor

  • 期刊论文

  • 发表日期：

    2026年6月26日

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  • Zhenyu Chen,
  • Yingchao Xu,
  • Subin Wang,
  • Zhifang Liu,
  • Yunxiang Du,
  • Yuxuan Wei,
  • Qingfeng Tu

摘要

A novel series of yellow-emitting silicate phosphors, NaY1−xSiO4: xDy3+ (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05), was synthesized via a high-temperature solid-state reaction method. The phase composition, crystal structure, concentration quenching behavior, thermal stability, photoluminescence lifetime, and CIE chromaticity coordinates of the samples were systematically investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectroscopy, high-temperature PL measurements, and fluorescence decay analysis. Under 348 nm ultraviolet excitation, the phosphors exhibited strong yellow emission. The luminescence intensity varied with Dy3+ doping concentration, showing concentration quenching at x = 0.03. Based on Dexter’s theory, the quenching mechanism was attributed to electric dipole–dipole interactions among Dy3+ ions. Furthermore, the thermal stability and chromaticity of the NaY0.97SiO4: 0.03Dy3+ sample were evaluated. At 473 K, the emission intensity retained approximately 86.21% of its initial value at room temperature, and the corresponding CIE chromaticity coordinates were (0.3377, 0.3556), located in the yellow region. These results suggest that NaY1−xSiO4:xDy3+ phosphors are promising candidates for applications in display devices and white light-emitting diodes (W-LEDs).