Structural and luminescence characterization of a Dy/Tb co-doped borophosphate glass

J. F. C. Carreira, B. A. Sava, L. Boroica, M. Elisa, R. Stefan, R. C.C. Monteiro, T. Monteiro, L. Rino

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1 Citation (Scopus)

Abstract

A new optical glass with the molar composition 20B2O3-50P2O5-10Li2O-9Al2O3-5ZnO-3Dy2O3-3Tb2O3 was obtained by melting-quenching technique comprising wet route raw materials preparation, and the structural and optical characteristics of the glass were investigated by different experimental techniques. The amorphous nature was confirmed by X-ray diffraction (XRD) and the thermal stability was assessed by differential thermal analysis (DTA). Information about the defects of the co-doped glass as well as about the elemental compositional homogeneity was revealed by scanning electron microscopy/energy dispersive spectrometry (SEM/EDS). Structural information provided by Fourier Transform Infrared (FTIR) and Raman spectroscopy indicated metaphosphate structure of the glass together with boron oxide mostly in [BO3] Q2 units and also P[sbnd]O[sbnd]B bonds. Ultraviolet–visible (UV–Vis) absorbance, photoluminescence (PL), photoluminescence excitation (PLE) and time resolved photoluminescence (TRPL) spectra and luminescence decay curve were investigated systematically. Energy transfer process between Dy3+ and Tb3+ ions and its influence on luminescent properties were discussed.

Original languageEnglish
Article number119719
JournalJournal of Non-Crystalline Solids
Volume526
DOIs
Publication statusPublished - 15 Dec 2019

Keywords

  • Borophosphate glasses
  • Dy Tb dopants
  • FTIR Raman spectroscopy
  • Luminescence
  • Thermal properties

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