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首页> 外文期刊>RSC Advances >Structural and spectral characterisation of Er3+ and Nd3+ doped Ga-La-S-Se glasses
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Structural and spectral characterisation of Er3+ and Nd3+ doped Ga-La-S-Se glasses

机译：掺Er3 +和Nd3 +的Ga-La-S-Se玻璃的结构和光谱表征

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In this work, the spectroscopy of Er ~(3+) and Nd ~(3+) doped Se-GLS glasses was studied. A structural comparison between doped and non-doped samples was done to assess the differences between the glasses. For this comparison, Raman spectroscopy and thermal analysis were employed. The spectral properties of the samples were studied in order to identify the mechanisms responsible for quenching the fluorescence lifetime of the dopants. In particular, cross-relaxation and concentration quenching were observed in Nd ~(3+) doped samples, whilst co-operative upconversion, radiation trapping and concentration quenching were observed in Er ~(3+) doped samples. The results obtained demonstrated the fundamental role of the phonon energy in the mechanism of fluorescence. The low phonon energy of chalcogenides decreased the rate of non-radiative processes promoting co-operative upconversion. This effect could be exploited to design new lasers and sensitizers for solar energy harvesters.
机译：在这项工作中，研究了掺Er〜（3+）和Nd〜（3+）的Se-GLS玻璃的光谱。进行了掺杂样品和非掺杂样品之间的结构比较，以评估玻璃之间的差异。为了进行比较，采用了拉曼光谱和热分析。研究了样品的光谱特性，以确定引起猝灭掺杂剂荧光寿命的机理。特别地，在掺钕（3+）的样品中观察到交叉弛豫和浓度猝灭，而掺Er（3+）的样品中观察到协同上转换，辐射俘获和浓度猝灭。获得的结果证明了声子能量在荧光机理中的基本作用。硫族化物的低声子能量降低了促进合作性上转换的非辐射过程的速率。可以利用这种效应来设计用于太阳能收集器的新型激光器和敏化剂。

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