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首页> 外文期刊>Physica, B. Condensed Matter >Fluorescence spectroscopy of Sm3+ ions in P2O5-PbO-Nb2O5 glasses
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Fluorescence spectroscopy of Sm3+ ions in P2O5-PbO-Nb2O5 glasses

机译：P2O5-PbO-Nb2O5玻璃中Sm3 +离子的荧光光谱

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摘要

Sm3+-doped lead phosphate-based glasses modified with niobium have been prepared and characterized by optical absorption, emission spectra and decay curve analysis. The peak positions and intensities of the absorption spectrum of 1.0 mol% Sm2O3-doped glass have been analysed by the free-ion Hamiltonian model and Judd-Ofelt analysis, respectively. The predicted radiative properties are comparable with the experimental values. The emission properties and lifetimes of the (4)G(5/2) level for different Sm3+ ion concentrations have been determined. Lifetime of the (4)G(5/2) level decreases, with increase of Sm3+ ions concentration, from 2.52 (0.1 mol%) to 0.57 ms (4.0 mol%) due to cross-relaxation energy transfer (ET) between Sm3+ ions. The decay curve for the (4)G(5/2) level is single exponential for 0-1 mol% Sm2O3 ions concentration and become non-exponential from 0.5 mol%. The non-exponential decay curves are well fitted to the Yokoto-Tanimoto model. From decay curve analyses, ET, donor to acceptor interaction and diffusion parameters have been obtained and their relative variation with concentration of Sm3+ ions has been discussed. The calculated relative donor quantum yield also supports ET between Sm3+ ions.
机译：制备了掺铌的Sm3 +掺杂磷酸铅基玻璃，并通过光吸收，发射光谱和衰减曲线分析对其进行了表征。分别通过自由离子哈密顿量模型和Judd-Ofelt分析法分析了1.0 mol％Sm2O3掺杂的玻璃的峰位置和吸收光谱强度。预测的辐射特性与实验值相当。确定了不同Sm3 +离子浓度的（4）G（5/2）能级的发射性质和寿命。由于Sm3 +离子之间的交叉弛豫能量转移（ET），随着Sm3 +离子浓度的增加，（4）G（5/2）的寿命从2.52（0.1 mol％）降低到0.57 ms（4.0 mol％） 。 （4）G（5/2）能级的衰减曲线对于0-1 mol％Sm2O3离子浓度为单指数，从0.5 mol％开始变为非指数。非指数衰减曲线非常适合横河-谷本模型。通过衰减曲线分析，获得了ET，供体-受体相互作用和扩散参数，并讨论了它们随Sm3 +离子浓度的相对变化。计算的相对供体量子产率也支持Sm3 +离子之间的ET。

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