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Structural and spectral characterisation of Er3+ and Nd3+ doped Ga-La-S-Se glasses

机译:ER3 +和ND3 +掺杂GA-LA-SE-SE玻璃的结构和光谱表征

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摘要

In this work, the spectroscopy of Er3+ and Nd3+ 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 Nd3+ doped samples, whilst co-operative upconversion, radiation trapping and concentration quenching were observed in Er3+ 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ER3 +和ND3 +掺杂SE-GLS玻璃的光谱。 掺杂和非掺杂样品之间的结构比较是为了评估眼镜之间的差异。 对于这种比较,采用拉曼光谱和热分析。 研究样品的光谱性质,以鉴定负责淬灭掺杂剂的荧光寿命的机制。 特别地,在Nd3 +掺杂样品中观察到易弛豫和浓度猝灭,而在ER3 +掺杂样品中观察到辐射捕获和浓缩猝灭。 获得的结果证明了声子能量在荧光机制中的基本作用。 硫属元素化物的低位旋光能量降低了促进合作效应的非辐射过程的速率。 可以利用这种效果来设计用于太阳能收割机的新激光器和敏感剂。

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  • 来源
    《RSC Advances》 |2018年第48期|共9页
  • 作者单位

    Univ Southampton Optoelctron Res Ctr Univ Rd Southampton SO17 1BJ Hants England;

    Ist Super Mario Boella Via PC Boggio 61 I-10134 Turin Italy;

    Univ Southampton Optoelctron Res Ctr Univ Rd Southampton SO17 1BJ Hants England;

    Univ Southampton Optoelctron Res Ctr Univ Rd Southampton SO17 1BJ Hants England;

    Politecn Torino INSTM Corso Duca Abruzzi 24 I-10129 Turin Italy;

    Politecn Torino INSTM Corso Duca Abruzzi 24 I-10129 Turin Italy;

    Univ Southampton Optoelctron Res Ctr Univ Rd Southampton SO17 1BJ Hants England;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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