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首页> 外文期刊>Solid state sciences >Effect of Tb3+ concentration in the visible emission of terbium-doped gadolinium oxysulfide microspheres
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Effect of Tb3+ concentration in the visible emission of terbium-doped gadolinium oxysulfide microspheres

机译：Tb3 +浓度在掺杂铽掺甲酸钆微球的可见发射中的影响

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摘要

Experimental data obtained from optical characterization of Gd2O2S:Tb(3+)microspheres were compared with a rate-equation model in order to understand and simulate the emission intensity and color tonality as a function of Tb3+ concentration. The microparticles were prepared by hydrothermal synthesis and characterized by TEM and XRD to confirm spherical microparticles with a hexagonal lattice. Furthermore, fluorescent spectroscopy and rate equation model revealed that the direct energy transfer between Gd3+- Tb3+ ions and the migration of the excitation energy between Tb3+ play an important role in the luminescence intensity, while the color tonality is mainly governed by the non-radiative relaxation processes between Tb3+ at low concentrations. Finally, our results suggest that the rate equation model provides an efficient alternative to estimate theoretically the maximum doping concentration in oxysulfides before they present quenching of luminescence.
机译：将Gd2O2s的光学表征获得的实验数据与速率方程模型进行比较，以便理解和模拟作为TB3 +浓度的函数的发光强度和色调。 通过水热合成制备微粒，其特征在于TEM和XRD，以确认具有六边形格子的球形微粒。 此外，荧光光谱和速率方程模型显示GD3 + - ＆gt之间的直接能量转移; Tb3 +离子和Tb3 +之间的激发能量的迁移在发光强度中起重要作用，而色调主要由Tb3 +在低浓度下的非辐射弛豫过程管辖。 最后，我们的结果表明，速率等式模型提供了一种有效的替代方案来估计氧硫化物中的最大掺杂浓度，然后呈现出发光的淬火。

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