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<p>Globally, people are using more energy, which has led to research into more sustainable energy sources. This research is the investigation of the structural and photometric properties of CaGd<sub>1−<i>x</i></sub>Al<sub>3</sub>O<sub>7</sub>: <i>x</i>Tb<sup>3+</sup> (<i>x</i> = 0.03, 0.04, 0.05, 0.06, and 0.07&#xa0;mol) nanophosphors, with the purpose of economically designing wLEDs. Here, the nanophosphor was created by the solution combustion method, and then its morphological characteristics and crystallite size were thoroughly examined using high-resolution transmission electron microscopy (HR-TEM) and X-ray diffraction techniques. The distinctive green emissions of Tb<sup>3+</sup> ions were observed in all samples under 310&#xa0;nm near ultraviolet light stimulation, which was caused by the <sup>5</sup>D<sub>4</sub> → <sup>7</sup>F<sub>5</sub> (543&#xa0;nm) transition. Investigations into the relationship between PL emission intensity and Tb<sup>3+</sup> doping concentration revealed that 4&#xa0;mol% was the ideal doping concentration. The critical distance was calculated theoretically to be approximately 19.32&#xa0;Å, and quadrupole-quadrupole interaction dominated the concentration quenching. Cool green emission from the nanophosphor is supported by chromaticity analysis for the optimized sample, which includes CIE (0.203, 0.602) with color temperature 7999&#xa0;K. The targeted Tb<sup>3+</sup> activated CaGdAl<sub>3</sub>O<sub>7</sub> nanophosphors are a favorable candidate for solid state lighting applications as a result of our studies.</p>

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Photoluminescent investigation and combustion synthesis of Tb3+-activated CaGdAl3O7 nanophosphors

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Diksha Rani,
  • Anil Kumar,
  • Dinesh Kumar

摘要

Globally, people are using more energy, which has led to research into more sustainable energy sources. This research is the investigation of the structural and photometric properties of CaGd1−xAl3O7: xTb3+ (x = 0.03, 0.04, 0.05, 0.06, and 0.07 mol) nanophosphors, with the purpose of economically designing wLEDs. Here, the nanophosphor was created by the solution combustion method, and then its morphological characteristics and crystallite size were thoroughly examined using high-resolution transmission electron microscopy (HR-TEM) and X-ray diffraction techniques. The distinctive green emissions of Tb3+ ions were observed in all samples under 310 nm near ultraviolet light stimulation, which was caused by the 5D4 → 7F5 (543 nm) transition. Investigations into the relationship between PL emission intensity and Tb3+ doping concentration revealed that 4 mol% was the ideal doping concentration. The critical distance was calculated theoretically to be approximately 19.32 Å, and quadrupole-quadrupole interaction dominated the concentration quenching. Cool green emission from the nanophosphor is supported by chromaticity analysis for the optimized sample, which includes CIE (0.203, 0.602) with color temperature 7999 K. The targeted Tb3+ activated CaGdAl3O7 nanophosphors are a favorable candidate for solid state lighting applications as a result of our studies.