Nb2O5 对掺杂 RE3+ 离子的纳米结构磷酸盐玻璃的发光特性和结构特性的影响

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids Pub Date : 2024-09-25 DOI:10.1016/j.jnoncrysol.2024.123232

Luiz P. Silva Neto , Nilmar Camilo , José C. Filho , Viviane Pilla , Luana E.S. Silva , Noelio O. Dantas , Acácio A. Andrade

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引用次数: 0

摘要

在玻璃中掺杂 RE3+ 离子的五氧化二铌（Nb2O5）在开发用于光学设备的发光材料方面引起了极大的兴趣。本研究探讨了一种采用 CdS 并掺杂 Nd3+ 和 Eu3+ 离子的纳米结构磷酸盐玻璃，重点关注 Nb2O5 添加的影响。利用光学吸收、光致发光（PL）、时间分辨光致发光和拉曼散射对其结构和发光特性进行了表征。研究发现，Nb2O5 对基质有显著影响，它是一种网络形成剂，并能将声子能量从 1060 cm-1 降低到 900 cm-1。Eu3+ 离子的不对称比例从 5 增加到 8，也证明了结构的变化。聚光衰变曲线表明 Nd3+ 离子分布在不同对称性的位点上，Nb2O5 使 4F3/2 电平的寿命从 337 μs 缩短到 282 μs。研究结果表明，Nb2O5 可以调节磷酸盐玻璃的结构和发光特性，因此有望成为一种先进的光致发光材料。

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Influence of Nb2O5 on the luminescent and structural properties of nanostructured phosphate glasses doped with RE3+ ions

Niobium pentoxide (Nb₂O₅) in glasses doped with RE³⁺ ions has garnered significant interest in developing luminescent materials for optical devices. This study explores a phosphate glass nanostructured with CdS and doped with Nd³⁺ and Eu³⁺ ions, focusing on the impact of Nb₂O₅ addition. Using optical absorption, photoluminescence (PL), time–resolved photoluminescence, and Raman Scattering, the structural and luminescent properties were characterized. Nb₂O₅ was found to significantly influence the matrix, acting as a network–forming agent, and reducing phonon energy from ∼1060 to 900 cm^-1. Structural changes were also evidenced by an increase in the asymmetric ratio of Eu³⁺ ions from ∼5 to 8. PL decay curves indicated Nd³⁺ ions distributed across sites with different symmetries, with Nb₂O₅ reducing the lifetime of the ⁴F_3/2 level from 337 to 282 μs. The findings demonstrate that Nb₂O₅ can modulate the structural and luminescent properties of phosphate glass, making it a promising for advanced photoluminescent materials.

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来源期刊

Journal of Non-crystalline Solids 工程技术-材料科学：硅酸盐

CiteScore

6.50

自引率

11.40%

发文量

576

审稿时长

35 days

期刊介绍： The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.