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<p>The preparation of LaAlO<sub>3</sub> doped with various concentrations of Dy<sup>3+</sup> via a solid-state reaction technique is reported. Optimum photoluminescence (PL) emission was observed for 3.0 mol.% dopant. The critical distance between the activators for the optimum PL case was 3.330 Å. PL emission peaks centered at 478 and 494 nm and at 590 and 615 nm were observed and attributed to the <sup>4</sup><i>F</i><sub>9/2</sub> → <sup>6</sup><i>H</i><sub>15/2</sub> and <sup>4</sup><i>F</i><sub>9/2</sub> → <sup>6</sup><i>H</i><sub>13/2</sub> transitions of Dy<sup>3+</sup>, respectively. The thermoluminescence glow curve shape factors for various cases indicated the existence of second-order kinetics with deeper traps with activation energies in the range of 0.44–0.46 eV.</p>

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Photoluminescence and Thermoluminescence Studies of LaAlO3 Perovskite Doped with Dy3+

  • 期刊论文

  • 发表日期：

    2026年7月21日

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  • R. S. Kundu,
  • R. Shrivastava

摘要

The preparation of LaAlO3 doped with various concentrations of Dy3+ via a solid-state reaction technique is reported. Optimum photoluminescence (PL) emission was observed for 3.0 mol.% dopant. The critical distance between the activators for the optimum PL case was 3.330 Å. PL emission peaks centered at 478 and 494 nm and at 590 and 615 nm were observed and attributed to the 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 transitions of Dy3+, respectively. The thermoluminescence glow curve shape factors for various cases indicated the existence of second-order kinetics with deeper traps with activation energies in the range of 0.44–0.46 eV.