Alkali and mixed alkali effect: spectroscopic properties of Eu3+ and Tb3+ ions doped zinc tungstate boro phosphate glasses

Abstract

Doped with trivalent rare-earth ions (Eu3+ and Tb3+), zinc tungstate borophosphate glasses are reported in this study, along with their structural, elemental, optical properties. Amorphous glass was identified via X-ray diffraction analysis. The elemental evaluation was finished using EDAX. The FTIR spectrum is used to identify ligands. The produced glasses’ optical features were studied using FT-Raman spectral analysis, photoluminescence excitation (PLE), and photoluminescence (PL) analysis. Emission spectra of glasses doped with Eu3+ ions reveal the bright red emission at 613 nm (5D0 → 7F2) with an excitation wavelength of 394 nm. (7F0 → 5L6) Green light is emitted at 545 nm (5D4 → 7F5) and 379 nm (7F6 → 5G6) is used for excitation in the emission spectra of glasses doped with Tb3+ ions. By analyzing decay curves, we may estimate how long Eu3+ or Tb3+ ions in BPWZL glasses will remain stable. The energy level diagram explains the emission procedure that takes place in (Eu3+ and Tb3+) doped zinc tungstate borophosphate glasses.