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<p>Dy<sup>3+</sup> and Eu<sup>3+</sup> co-doped borosilicate glasses have been synthesised via melt quench technique. Amorphous behaviour of the sample has been verified by XRD study. FT-IR analysis confirmed the presence of various bonds in the host lattice. Energy band gap values of the co-doped glasses were estimated from the UV-VIS data via Tauc Plot. Excitation spectra were recorded under 575&#xa0;nm (Dy<sup>3+</sup>) and 612&#xa0;nm (Eu<sup>3+</sup>) emission wavelengths of co-doped glasses. Emission spectra of the co-doped glasses under 350&#xa0;nm and 393&#xa0;nm showed a significant shift towards increasing red emission with increasing Eu<sup>3+</sup> concentrations. Dexter’s theory was applied to study the transfer of energy mechanism between Dy<sup>3+</sup> and Eu<sup>3+</sup> ions. Time decay curves were plotted for the co-doped glasses for 350&#xa0;nm excitation and 576&#xa0;nm emission wavelength. CIE coordinate diagram shows a shift towards red region with increasing excitation wavelength from 350&#xa0;nm to 465&#xa0;nm. The enhancement of red component with increasing Eu<sup>3+</sup> concentrations in the as -prepared borosilicate glasses can be appropriately utilised in various w-LEDs and other optoelectronic devices applications.</p>

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Enhanced Red Luminescence in Dy3+/Eu3+ Co-doped Calcium Alumino Borosilicate Glasses for w-LED Applications

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • Videsh Kumar,
  • Sheetal Kumari,
  • Shristy Malik,
  • Ravita,
  • Tripti Sharma,
  • Aman Prasad,
  • A. S. Rao

摘要

Dy3+ and Eu3+ co-doped borosilicate glasses have been synthesised via melt quench technique. Amorphous behaviour of the sample has been verified by XRD study. FT-IR analysis confirmed the presence of various bonds in the host lattice. Energy band gap values of the co-doped glasses were estimated from the UV-VIS data via Tauc Plot. Excitation spectra were recorded under 575 nm (Dy3+) and 612 nm (Eu3+) emission wavelengths of co-doped glasses. Emission spectra of the co-doped glasses under 350 nm and 393 nm showed a significant shift towards increasing red emission with increasing Eu3+ concentrations. Dexter’s theory was applied to study the transfer of energy mechanism between Dy3+ and Eu3+ ions. Time decay curves were plotted for the co-doped glasses for 350 nm excitation and 576 nm emission wavelength. CIE coordinate diagram shows a shift towards red region with increasing excitation wavelength from 350 nm to 465 nm. The enhancement of red component with increasing Eu3+ concentrations in the as -prepared borosilicate glasses can be appropriately utilised in various w-LEDs and other optoelectronic devices applications.