Department of Physics, S.V. University, Tirupathi 517 502, AP, India.
Department of Physics, S.V. University, Tirupathi 517 502, AP, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Mar 25;122:639-48. doi: 10.1016/j.saa.2013.11.102. Epub 2013 Nov 28.
Different metal oxide based fluoro-phosphate glasses doped with Sm(3+) ions are investigated using XRD, SEM with EDS, FTIR, Raman spectra, optical absorption and photo-luminescence techniques. These glass matrices have been prepared by conventional melt quenching technique. The glassy nature of the present glass matrices are confirmed by XRD profiles and SEM photographs. The composition of the glasses is checked by EDS. Based on FTIR and Raman spectra, the authors have analyzed functional groups that are present in the glass matrices. Judd-Ofelt intensity parameters, Ωλ (λ=2,4,6) have been evaluated from absorption spectra. Radiative parameters such as radiative transition probabilities (AR), radiative lifetimes (τR), integrated absorption cross sections (Σ) and branching ratios (βR) are calculated using Judd-Ofelt intensity parameters. From the photoluminescence spectra, experimental branching ratios (βexp) and stimulated emission cross-sections (σP) for all the observed emission transitions are calculated. To investigate luminescence potentiality of (4)G5/2→(6)H7/2 emission level of Sm(3+) doped different fluorophosphate glasses, experimental radiative lifetimes (τexp) are obtained from decay curve analysis for all glass matrices. Finally, these observed results are discussed and compared with the literature data.
采用 X 射线衍射（XRD）、扫描电子显微镜结合能谱分析（SEM-EDS）、傅里叶变换红外光谱（FTIR）、拉曼光谱、吸收光谱和光致发光（PL）技术研究了不同金属氧化物基掺 Sm(3+)氟磷酸盐玻璃。这些玻璃基质是通过传统的熔融淬火技术制备的。XRD 图谱和 SEM 照片证实了本玻璃基质的玻璃态。EDS 检查了玻璃的组成。基于 FTIR 和拉曼光谱，作者分析了玻璃基质中存在的功能团。从吸收光谱中评估了 Judd-Ofelt 强度参数Ωλ（λ=2,4,6）。利用 Judd-Ofelt 强度参数计算了辐射参数，如辐射跃迁概率（AR）、辐射寿命（τR）、积分吸收截面（Σ）和分支比（βR）。从光致发光光谱中，计算了所有观察到的发射跃迁的实验分支比（βexp）和受激发射截面（σP）。为了研究 Sm(3+)掺杂不同氟磷酸盐玻璃中（4）G5/2→（6）H7/2发射能级的发光潜力，通过对所有玻璃基质的衰减曲线分析获得了实验辐射寿命（τexp）。最后，对这些观察结果进行了讨论，并与文献数据进行了比较。
