Luminescent properties of Tb3+ doped sodium silica germanate glasses

Mario Enrique Álvarez-Ramos, Roberto Carlos Carrillo-Torres*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Tb3+-doped sodium silica germanate glasses were fabricated by conventional melt quenching technique with dopant concentrations of 0.3%mol and 0.9%mol. Their structural characteristics were analyzed through X-ray diffraction and Raman spectroscopy. The study of their optical properties was carried out through steady-state and time-resolved fluorescence spectroscopies. The emission spectra of both glasses are dominated by 5D47FJ manifold transitions. The most intense band, associated with the 5D47F5 transition, shows a clear split into two peaks (541 nm 550 nm) due to crystal field splitting. The decay of Tb3+ emission at 458 nm exhibits a non-exponential evolution accompanied by a shortening of its lifetime as the concentration of Tb3+ increases, due to a non-radiative Tb3+-Tb3+ energy transfer through the cross-relaxation mechanism [5D3, 7F6] → [5D4, 7F0] between two terbium ions. The color coordinates at different excitation wavelengths lie in the yellow-green region of the Commission International de l’Eclairage chromaticity diagram. The results indicate that the studied glasses can be used in applications such as solid-state lighting and display devices.

Original languageEnglish
Pages (from-to)4031-4037
Number of pages7
JournalIndian Journal of Physics
Volume97
Issue number13
DOIs
StatePublished - Nov 2023

Bibliographical note

Publisher Copyright:
© 2023, Indian Association for the Cultivation of Science.

Keywords

  • Cross-relaxation
  • Energy transfer
  • Luminescence
  • Sodium silica germanate glasses
  • Terbium

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