Scholarlink

<p>A series of trivalent samarium ion (Sm<sup>3+</sup>)-doped tetrahedral scheelite-structured AgGd(MoO<sub>4</sub>)<sub>2</sub> (<i>x</i> at% Sm<sup>3+</sup>:AgGd(MoO<sub>4</sub>)<sub>2</sub>, <i>x</i> = 1–12) phosphors were synthesized using the high-temperature solid-state method. The structural characterization of these phosphors was performed using X-ray diffraction (XRD), XRD Rietveld refinement, a scanning electron microscope, and Fourier transform infrared spectroscopy. Density functional theory calculations were employed to unveil the electronic structure (including the band structure and density of states). Photoluminescence (PL) spectroscopy was employed to scrutinize the luminescent properties and the thermal stability of the emission was also evaluated. The most prominent emission peak was observed at 646&#xa0;nm upon excitation at 406&#xa0;nm. The quenching mechanism of Sm<sup>3+</sup> ions within the AgGd(MoO<sub>4</sub>)<sub>2</sub> host lattice was identified as a dipole–dipole interaction, with the quenching concentration of 2 at%. These findings collectively highlight the significant potential of Sm<sup>3+</sup>:AgGd(MoO<sub>4</sub>)<sub>2</sub> orange-reddish phosphors for application in white light-emitting diodes.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Orange-reddish luminescence of Sm3+-doped AgGd(MoO4)2 scheelite-type phosphor with high thermal stability

  • 期刊论文

  • 发表日期：

    2026年4月13日

查看全文
  • Yongqing Zheng,
  • Chong Li,
  • Wenzhi Su,
  • Yong Zou,
  • Shoujun Ding

摘要

A series of trivalent samarium ion (Sm3+)-doped tetrahedral scheelite-structured AgGd(MoO4)2 (x at% Sm3+:AgGd(MoO4)2, x = 1–12) phosphors were synthesized using the high-temperature solid-state method. The structural characterization of these phosphors was performed using X-ray diffraction (XRD), XRD Rietveld refinement, a scanning electron microscope, and Fourier transform infrared spectroscopy. Density functional theory calculations were employed to unveil the electronic structure (including the band structure and density of states). Photoluminescence (PL) spectroscopy was employed to scrutinize the luminescent properties and the thermal stability of the emission was also evaluated. The most prominent emission peak was observed at 646 nm upon excitation at 406 nm. The quenching mechanism of Sm3+ ions within the AgGd(MoO4)2 host lattice was identified as a dipole–dipole interaction, with the quenching concentration of 2 at%. These findings collectively highlight the significant potential of Sm3+:AgGd(MoO4)2 orange-reddish phosphors for application in white light-emitting diodes.