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<p>We report a series of singly-doped K<sub>5</sub>La(MoO<sub>4</sub>)<sub>4</sub>:Er<sup>3+</sup>, Tb<sup>3+</sup> phosphors synthesized by a solid-state reaction (SSR) method and their structural and luminescence properties. Powder x-ray diffraction (PXRD) confirmed the phase and trigonal crystal structure with the <i>R</i>3<i>m</i>(#166) space group. Photoluminescence spectra of the as synthesized phosphors demonstrated a strong green emission with an intense peak at 545&#xa0;nm (<sup>5</sup>D<sub>4</sub>&#xa0;→&#xa0;<sup>7</sup>F<sub>5</sub>) upon excitation of 281&#xa0;nm for Tb<sup>3+</sup> ions and at 525&#xa0;nm (<sup>2</sup>H<sub>11/2</sub> <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11664_2025_12234_Article_IEq1.gif" Format="GIF" Height="6" Rendition="HTML" Resolution="72" Type="Linedraw" Width="21" /> </InlineMediaObject> <EquationSource Format="TEX">\(\to\)</EquationSource> <EquationSource Format="MATHML"><math> <mo stretchy="false">→</mo> </math></EquationSource> </InlineEquation> <sup>4</sup>I<sub>15/2</sub>) upon excitation of 377&#xa0;nm for Er<sup>3+</sup> ions. The SEM and EDS results indicate that the particle size was in the micron range and that elements of K, La, Mo, and O were uniformly distributed in the samples. These results lead to potential applications of K<sub>5</sub>La(MoO<sub>4</sub>)<sub>4</sub>:Tb<sup>3+</sup>, Er<sup>3+</sup> phosphors for display, with white- and green-emitting LEDs.</p> Graphical abstract <p></p>

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Synthesis and Photoluminescence in K5La(MoO4)4: Ln3+ (Ln = Tb, Er) Green-Emitting Phosphor for Optoelectronic Applications

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Amolkumar N. Jadhav,
  • Rajesh M. Bhagat,
  • Vivek Bhusari,
  • Prashant D. Hiwase,
  • Nadeem G. Alvi,
  • R. S. Chandok,
  • Shruti P. Dhale,
  • Nilesh S. Ugemuge,
  • Sunil S. Chaudhari,
  • Ashish W. Selokar

摘要

We report a series of singly-doped K5La(MoO4)4:Er3+, Tb3+ phosphors synthesized by a solid-state reaction (SSR) method and their structural and luminescence properties. Powder x-ray diffraction (PXRD) confirmed the phase and trigonal crystal structure with the R3m(#166) space group. Photoluminescence spectra of the as synthesized phosphors demonstrated a strong green emission with an intense peak at 545 nm (5D4 → 7F5) upon excitation of 281 nm for Tb3+ ions and at 525 nm (2H11/2 \(\to\) → 4I15/2) upon excitation of 377 nm for Er3+ ions. The SEM and EDS results indicate that the particle size was in the micron range and that elements of K, La, Mo, and O were uniformly distributed in the samples. These results lead to potential applications of K5La(MoO4)4:Tb3+, Er3+ phosphors for display, with white- and green-emitting LEDs.

Graphical abstract