Dysprosium doped lead fluoroborate glasses: Structural, optical, and thermal investigations

✍ Scribed by Rayappan, I. Arul ;Maheshvaran, K. ;Babu, S. Surendra ;Marimuthu, K.

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 454 KB
• Volume: 209
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201127386

✦ Synopsis

Abstract

Dy^3+^ doped lead fluoroborate (LFB) glasses (B~2~O~3~ + PbO + PbF~2~) have been prepared following conventional melt quenching technique by varying the concentration of Dy~2~O~3~ in the order 0.01, 0.1, 1, 2, and 3 mol%. X‐ray powder diffraction (XRD), Fourier transform infrared (FTIR), optical absorption, fluorescence emission, and decay curves have been recorded and analyzed. From the optical measurements and based on the Judd–Ofelt (JO) theory, the JO intensity parameters were evaluated and in turn used to evaluate the radiative transition probabilities (A), stimulated emission cross‐section ($\sigma _{{\rm P}}^{{\rm E}} $), radiative lifetimes (τ~rad~), and branching ratios (β~R~) for the various ^4^F~9/2~ → ^6^H~J~ (J = 11/2, 13/2, 15/2) transitions of Dy^3+^ ions in the LFB glasses and these values were compared with the other reported Dy^3+^:glasses. The decay curves of the ^4^F~9/2~ level were measured and found to be deviate from the exponential nature with the increase in Dy^3+^ ion concentration. The luminescence quantum efficiency of the ^4^F~9/2~ level was also determined and discussed. Differential scanning calorimetry (DSC) curves were used to evaluate the glass stability factor (S) and Hruby's parameter (H~R~) through the glass transition (T~g~), crystallization (T~c~), and melting (T~m~) temperatures and these results were discussed and reported.