کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1402133 | 1501737 | 2015 | 9 صفحه PDF | دانلود رایگان |
• Spectroscopic properties of Dy3+ doped different FP glasses are studied.
• Higher covalency is observed in the sodium fluoro-phosphate (FP) glasses.
• Sodium FP glass has highest luminescence intensity at 577 nm than other FP glasses.
• FP glasses can be useful for white light emission.
Dy3+ doped different fluoro-phosphate glasses are prepared and they are characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR), Raman, optical absorption, and photoluminescence (PL) techniques. The structural characterization is accomplished by XRD, FTIR and Raman spectroscopy. The morphological analysis was performed by SEM. The absorption spectra have been analyzed using Judd–Ofelt theory and the intensity parameters have been evaluated. These parameters are used to calculate radiative properties such as emission probabilities (AR), radiative lifetimes (τR) and integrated absorption cross-sections (Σ) for different Dy3+ transitions. The PL spectra exhibit bands in the blue, yellow and red regions. Furthermore, the dependence of luminescence properties such as stimulated emission cross-sections (σp) and branching ratios (β) on different metal cations in these glasses is studied. From decay curve analysis, the lifetimes of the excited state 4F9/2 have been measured. The calorimetric property is also studied based on Commission International del’Eclairage (CIE) standards for Dy3+ doped different fluoro-phosphate glasses and discussed.
Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Structure - Volume 1080, 25 January 2015, Pages 153–161