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<p>In the present study, Titanium dioxide (TiO<sub>2</sub>) doped with Eu<sup>3+</sup> at different molar concentrations (0 to 3.0&#xa0;mol %) was synthesized by the Sol–Gel method. The prepared powders were characterized using X-ray diffraction (XRD), FTIR, UV–Vis spectroscopy, and photoluminescence spectroscopy. The XRD patterns confirmed the formation of a single anatase phase that is in agreement with JCPDS card no. 01–073-1764. FTIR spectra depicted the characteristic peaks of the Ti–O bond stretching vibrations observed at 420&#xa0;cm<sup>-1</sup>. The Diffuse reflectance study confirms that the prepared phosphors are wide-band gap material, which can successfully accommodate the dopant ions. Photoluminescence (PL) spectra reveal the samples are excited by near UV light, with the strongest emission around 615&#xa0;nm that corresponds to the electrical dipole transition <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub> of Eu<sup>3+</sup> ions. Judd–Ofelt theory was also employed, and JO intensity parameters along with the radiative properties were evaluated. The phonon sideband analysis using excitation spectra was applied to get the phonon energy and the electron–phonon coupling strength. The CIE coordinates (0.66, 0.34) affirm the red color emission from the prepared samples. The luminescence decay analysis was also performed to determine the lifetime of the materials. All these research findings suggest that the synthesized phosphors are an auspicious candidate to be exploited in the field of solid-state lighting applications.</p>

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Tailoring structural and optical properties of Europium-doped TiO2 nanopowders for advanced solid-state lighting

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • Ayesha Bhandari,
  • H. C. Swart,
  • Vinay Kumar

摘要

In the present study, Titanium dioxide (TiO2) doped with Eu3+ at different molar concentrations (0 to 3.0 mol %) was synthesized by the Sol–Gel method. The prepared powders were characterized using X-ray diffraction (XRD), FTIR, UV–Vis spectroscopy, and photoluminescence spectroscopy. The XRD patterns confirmed the formation of a single anatase phase that is in agreement with JCPDS card no. 01–073-1764. FTIR spectra depicted the characteristic peaks of the Ti–O bond stretching vibrations observed at 420 cm-1. The Diffuse reflectance study confirms that the prepared phosphors are wide-band gap material, which can successfully accommodate the dopant ions. Photoluminescence (PL) spectra reveal the samples are excited by near UV light, with the strongest emission around 615 nm that corresponds to the electrical dipole transition 5D0 → 7F2 of Eu3+ ions. Judd–Ofelt theory was also employed, and JO intensity parameters along with the radiative properties were evaluated. The phonon sideband analysis using excitation spectra was applied to get the phonon energy and the electron–phonon coupling strength. The CIE coordinates (0.66, 0.34) affirm the red color emission from the prepared samples. The luminescence decay analysis was also performed to determine the lifetime of the materials. All these research findings suggest that the synthesized phosphors are an auspicious candidate to be exploited in the field of solid-state lighting applications.