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<p>This research explores luminescent properties of Eu<sup>3+</sup>-doped 0.42Pb(Mg<sub>0.335</sub>Nb<sub>0.665</sub>)O<sub>3</sub>–0.26Pb(In<sub>0.5</sub>Nb<sub>0.5</sub>)O<sub>3</sub>–0.32PbTiO<sub>3</sub> (PMINT:Eu<sup>3+</sup>) phosphors for red emission in lighting applications. PMINT: Eu<sup>3+</sup> was synthesized via solid-state-route and characterized by XRD, confirming pure tetragonal phase. Excitation spectra at 615&#xa0;nm emission showed broad charge-transfer-band at 323&#xa0;nm and sharp f-f transitions of Eu<sup>3+</sup>. Emission spectra at 465&#xa0;nm excitation revealed orange and red bands (591-650&#xa0;nm). Judd–Ofelt analysis offered detailed insights into optical properties, predicting radiative transition probabilities, branching ratios, and lifetimes of excited Eu<sup>3+</sup> states. High branching ratio for <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub> transition (red emission-615&#xa0;nm) indicates efficient conversion of absorbed energy into red light. This makes these phosphors highly suitable for applications requiring pure-red emission. The phosphors achieved &gt; 90% color purity and exhibited high activation energy of 0.30&#xa0;eV, suggesting excellent thermal stability. The intense blue excitation and narrow red emission make PMINT: Eu<sup>3+</sup> phosphors suitable for LEDs, enhancing color accuracy in white LEDs, offering high-fidelity white light for various applications.</p>

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Enhanced red-emitting and thermally stable 0.42Pb(Mg0.335Nb0.665)O3–0.26Pb(In0.5Nb0.5)O3–0.32PbTiO3: Eu3+ phosphor: Judd–Ofelt analysis

  • 期刊论文

  • 发表日期：

    2025年5月21日

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  • Jatin Dhanuka,
  • Sudipta Som,
  • G. Anandha Babu

摘要

This research explores luminescent properties of Eu3+-doped 0.42Pb(Mg0.335Nb0.665)O3–0.26Pb(In0.5Nb0.5)O3–0.32PbTiO3 (PMINT:Eu3+) phosphors for red emission in lighting applications. PMINT: Eu3+ was synthesized via solid-state-route and characterized by XRD, confirming pure tetragonal phase. Excitation spectra at 615 nm emission showed broad charge-transfer-band at 323 nm and sharp f-f transitions of Eu3+. Emission spectra at 465 nm excitation revealed orange and red bands (591-650 nm). Judd–Ofelt analysis offered detailed insights into optical properties, predicting radiative transition probabilities, branching ratios, and lifetimes of excited Eu3+ states. High branching ratio for 5D0 → 7F2 transition (red emission-615 nm) indicates efficient conversion of absorbed energy into red light. This makes these phosphors highly suitable for applications requiring pure-red emission. The phosphors achieved > 90% color purity and exhibited high activation energy of 0.30 eV, suggesting excellent thermal stability. The intense blue excitation and narrow red emission make PMINT: Eu3+ phosphors suitable for LEDs, enhancing color accuracy in white LEDs, offering high-fidelity white light for various applications.