Scholarlink

<p>A series of singly doped Er<sup>3+</sup> and Tb<sup>3+</sup> ions are used to generate green emission from the Na<sub>5</sub>Y(MoO<sub>4</sub>)<sub>4</sub> host matrix. These phosphors were prepared using the solid-state reaction (SSR) route. X-ray diffraction (XRD) results confirm the Scheelite-type tetragonal structure with a I4<sub>1</sub>/a space group. Photoluminescence (PL) behavior in the visible region has been studied. Host excitation at 292&#xa0;nm is also observed in this phosphor owing to the charge transfer band (CTB). Under 292 nm and 377&#xa0;nm excitation, the highly intense emission for Er<sup>3+</sup> doped Na<sub>5</sub>Y(MoO<sub>4</sub>)<sub>4</sub> was obtained at 554&#xa0;nm (<sup>4</sup>S<sub>3/2</sub> → <sup>4</sup>I<sub>15/2</sub>). For Tb<sup>3+</sup> ions, dominant emission was obtained at 545&#xa0;nm (<sup>5</sup>D<sub>4</sub> → <sup>7</sup>F<sub>5</sub>) for the excitation of 292&#xa0;nm and 487&#xa0;nm. Generally, these rare earth ions are extracted from mineral ores including monazite from mining. CIE coordinates are noticed in the range of 0.246 to 0.73 and correlated color temperature (CCT) and color purity (CP) values are also obtained for quenched concentrations of Er<sup>3+</sup> and Tb<sup>3+</sup> ions. CIE coordinates, CCT, and CP values confirm this phosphor as a cool green-emitting phosphor with maximum color purity near 90% in optimum concentrations of sample. Luminescence lifetime measurements were also performed for <sup>4</sup>S<sub>3/2</sub> → <sup>4</sup>I<sub>15/2</sub> transition causing emission at 554&#xa0;nm. From this study, the synthesized phosphors can be considered as a viable material for green-emitting LEDs, white light-emitting diodes (wLEDs), and other optoelectronic devices.</p> Graphical abstract <p></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

Synthesis, Structure, Morphology, and Host-Sensitized Luminescence in Na5Y(MoO4)4:Er3+, Tb3+ Green-emitting Phosphors for Optoelectronic Applications

  • 期刊论文

  • 发表日期：

    2026年7月17日

查看全文
  • Shubham Warudkar,
  • Shruti P. Dhale,
  • Nilesh Ashtankar,
  • Hamdy Khamees Thabet,
  • Zeinhom M. El-Bahy,
  • Shweta Vyas,
  • R. V. Barde,
  • Nilesh S. Ugemuge

摘要

A series of singly doped Er3+ and Tb3+ ions are used to generate green emission from the Na5Y(MoO4)4 host matrix. These phosphors were prepared using the solid-state reaction (SSR) route. X-ray diffraction (XRD) results confirm the Scheelite-type tetragonal structure with a I41/a space group. Photoluminescence (PL) behavior in the visible region has been studied. Host excitation at 292 nm is also observed in this phosphor owing to the charge transfer band (CTB). Under 292 nm and 377 nm excitation, the highly intense emission for Er3+ doped Na5Y(MoO4)4 was obtained at 554 nm (4S3/2 → 4I15/2). For Tb3+ ions, dominant emission was obtained at 545 nm (5D4 → 7F5) for the excitation of 292 nm and 487 nm. Generally, these rare earth ions are extracted from mineral ores including monazite from mining. CIE coordinates are noticed in the range of 0.246 to 0.73 and correlated color temperature (CCT) and color purity (CP) values are also obtained for quenched concentrations of Er3+ and Tb3+ ions. CIE coordinates, CCT, and CP values confirm this phosphor as a cool green-emitting phosphor with maximum color purity near 90% in optimum concentrations of sample. Luminescence lifetime measurements were also performed for 4S3/2 → 4I15/2 transition causing emission at 554 nm. From this study, the synthesized phosphors can be considered as a viable material for green-emitting LEDs, white light-emitting diodes (wLEDs), and other optoelectronic devices.

Graphical abstract