Red-emitting olivine-type ceramic luminophores Li2MGeO4 (M = Zn, Mg) doped with Sm3+

Q2 Engineering Optical Materials: X Pub Date : 2024-03-30 DOI:10.1016/j.omx.2024.100311

Nikola Bednarska-Adam , Marta Kuwik , Tomasz Goryczka , Wojciech A. Pisarski , Joanna Pisarska

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Abstract

This article investigates the luminescent properties of olivine-type germanate ceramics luminophores doped with trivalent samarium (Sm³⁺) ions, prepared through a solid-state reaction method with two distinct compositions: Li₂MgGeO₄:0.5Sm³⁺ and Li₂ZnGeO₄:0.5Sm³⁺. The emission spectra for germanate systems displayed characteristic bands associated with Sm³⁺ ion transitions. The results obtained for the studied ceramic luminophores indicated that orangish-red and red emissions attributed to characteristic 4f-4f transitions of Sm³⁺ ions. On the other hand, broad bands assigned directly to the ceramic matrices were registered around 425 nm and 440 nm for Li₂MgGeO₄:0.5Sm³⁺ and Li₂ZnGeO₄:0.5Sm³⁺ samples, respectively. The impact of the matrix composition on the emission spectra of samarium-doped olivine-type germanate ceramics has been examined in details.

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掺杂了 Sm3+ 的橄榄石型陶瓷发光体 Li2MGeO4（M = Zn、Mg）的红色发光体

本文研究了掺杂三价钐（Sm3+）离子的橄榄石型锗酸盐陶瓷发光体的发光特性：Li2MgGeO4:0.5Sm3+ 和 Li2ZnGeO4:0.5Sm3+。锗酸盐体系的发射光谱显示出与 Sm3+ 离子跃迁相关的特征带。所研究陶瓷发光体的结果表明，橘红色和红色发射归因于 Sm3+ 离子的特征性 4f-4f 转变。另一方面，Li2MgGeO4:0.5Sm3+ 和 Li2ZnGeO4:0.5Sm3+ 样品分别在 425 纳米和 440 纳米附近出现了直接归属于陶瓷基质的宽带。详细研究了基体成分对掺钐橄榄石型锗酸盐陶瓷发射光谱的影响。

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