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<p>This study investigates the structural, optical, and electrical properties of La₂O₃ and La₂O₃/SnO₂ nanocomposites, with applications in microelectronics and optoelectronics. SnO₂ improves the photoluminescence and dielectric properties of La₂O₃. La₂O₃ exhibits emission peaks at 592&#xa0;nm, 651&#xa0;nm, and 710&#xa0;nm, with 85% color purity. La₂O₃/SnO₂ composites demonstrate reduced color fidelity (60–65%), a transition from orange-red to UV-blue, and emissions at 322–379&#xa0;nm, with a peak at 358&#xa0;nm (~ 350 a.u.). Electrical experiments demonstrate a transition from grain-dominated conduction in La₂O₃ to mixed conduction in composites. This is evidenced by a 40% reduction in real impedance (Z′), which suggests enhanced carrier mobility from Sn<sup>4</sup>⁺-induced oxygen vacancies. The Maxwell–Wagner and Koop models are supported by the composites' improved AC conductivity and dielectric relaxation. The composites exhibit potential for use in high-efficiency UV light-emitting devices due to their shift in emission energy and a CCT of 9800&#xa0;K.</p>

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Tailoring photoluminescence and dielectric performance in La₂O₃/SnO₂ nanocomposites for advanced semiconductor and optoelectronic applications

  • 期刊论文

  • 发表日期：

    2025年8月25日

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  • V. Charles Vincent,
  • P. Elaiyaraja,
  • S. Senthil,
  • A. Jayanthi,
  • V. Ratchagar,
  • S. Srinivasan

摘要

This study investigates the structural, optical, and electrical properties of La₂O₃ and La₂O₃/SnO₂ nanocomposites, with applications in microelectronics and optoelectronics. SnO₂ improves the photoluminescence and dielectric properties of La₂O₃. La₂O₃ exhibits emission peaks at 592 nm, 651 nm, and 710 nm, with 85% color purity. La₂O₃/SnO₂ composites demonstrate reduced color fidelity (60–65%), a transition from orange-red to UV-blue, and emissions at 322–379 nm, with a peak at 358 nm (~ 350 a.u.). Electrical experiments demonstrate a transition from grain-dominated conduction in La₂O₃ to mixed conduction in composites. This is evidenced by a 40% reduction in real impedance (Z′), which suggests enhanced carrier mobility from Sn4⁺-induced oxygen vacancies. The Maxwell–Wagner and Koop models are supported by the composites' improved AC conductivity and dielectric relaxation. The composites exhibit potential for use in high-efficiency UV light-emitting devices due to their shift in emission energy and a CCT of 9800 K.