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首页> 外文期刊>Physica, B. Condensed Matter >Spectroscopic features of Pr3+, Nd3+, Sm3+ and Er3+ ions in Li2O-MO (Nb2O5, MoO3 and WO3)-B2O3 glass systems
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Spectroscopic features of Pr3+, Nd3+, Sm3+ and Er3+ ions in Li2O-MO (Nb2O5, MoO3 and WO3)-B2O3 glass systems

机译：Li2O-MO（Nb2O5，MoO3和WO3）-B2O3玻璃系统中Pr3 +，Nd3 +，Sm3 +和Er3 +离子的光谱特征

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摘要

Li2O-MO (Nb2O5, MoO3 and WO3)-B2O3 glasses doped with four rare earth ions, viz., Pr3+, Nd3+, Sm3+ and Er3+ (of 1.0 mol% each) were prepared. The glasses were characterized by X-ray diffraction, differential scanning calorimetry, ESR, optical absorption and photoluminescence spectra. From the measured intensities of various absorption bands of these glasses, the Judd-Ofelt parameters Omega(2), Omega(4) and Omega(6) have been evaluated. The Judd-Ofelt theory could successfully be applied to characterize the absorption and luminescence spectra of these glasses. From this theory, various radiative properties like transition probability A, branching ratio beta(r), the radiative life time tau(r) and the emission cross-section sigma(E) for various emission levels of these glasses have been determined and reported. An attempt has also been made to throw some light on the relationship between the structural modifications and luminescence efficiencies of all the three glasses. The analysis of the data indicated high non-radiative losses in Nb2O5 mixed glasses. (C) 2008 Elsevier B.V. All rights reserved.
机译：制备掺杂有四个稀土离子的Li 2 O-MO（Nb 2 O 5，MoO 3和WO 3）-B 2 O 3玻璃，即Pr 3+，Nd 3+，Sm 3+和Er 3+（各为1.0摩尔％）。通过X射线衍射，差示扫描量热法，ESR，光吸收和光致发光光谱来表征玻璃。从这些眼镜的各种吸收带的测量强度，已评估了Judd-Ofelt参数Omega（2），Omega（4）和Omega（6）。 Judd-Ofelt理论可以成功地应用于表征这些玻璃的吸收光谱和发光光谱。根据该理论，已经确定并报告了这些玻璃的各种发射水平的各种辐射特性，如跃迁几率A，分支比β（r），辐射寿命tau（r）和发射截面sigma（E）。还试图阐明所有三种玻璃的结构修改和发光效率之间的关系。数据分析表明，Nb2O5混合玻璃的非辐射损耗较高。 （C）2008 Elsevier B.V.保留所有权利。

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