掺杂了Sm和Cu的四硼酸锂玻璃的结构和光谱研究。

IF 2.9 3区 化学 Q3 CHEMISTRY, PHYSICAL
B. V. Padlyak, I. I. Kindrat, V. T. Adamiv, A. Drzewiecki, B. Cieniek and I. Stefaniuk
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引用次数: 0

摘要

利用 XRD、EPR、紫外-可见-近红外吸收和发光方法研究了 Cu-Sm 共掺杂 Li2B4O7 玻璃的局部结构和光谱特性,并将其与 Sm 掺杂和 Cu 掺杂 Li2B4O7 玻璃的相应结果进行了比较。EPR 光谱显示了一个轴对称信号,其特征超频结构属于 Cu2+ 离子。测定了 Cu2+/Cutotal 比率。光学吸收光谱显示出一个属于 Cu2+ 离子的宽而强的波段和几个属于 Sm3+ 离子的较弱的窄波段。对 Sm3+ 和 Cu+ 离子的光致发光 (PL) 和光致发光激发 (PLE) 光谱以及 PL 衰减动力学进行了记录、分析和讨论。光致发光光谱显示出一条宽带,分配给 Cu+ 离子的 3d94s1 → 3d10 转变,以及四条窄带,分配给 Sm3+ 离子的 4G5/2 → 6HJ(J = 5/2-11/2)转变。观察到的 PL 强度变化、Sm3+ 寿命缩短和 Cu+ 寿命延长的原因是 Sm3+ → Cu+ 的能量转移以及 Cu2+ 离子对 Sm3+ 发射的再吸收。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Structural and spectroscopic studies of lithium tetraborate glass co-doped with Sm and Cu

Structural and spectroscopic studies of lithium tetraborate glass co-doped with Sm and Cu

The local structure and spectroscopic properties of Cu–Sm co-doped Li2B4O7 glass have been studied using XRD, EPR, UV-Vis-NIR absorption and luminescence methods and compared with the corresponding results for Sm-doped and Cu-doped Li2B4O7 glasses. The EPR spectrum reveals an axially-symmetric signal with a characteristic hyperfine structure belonging to Cu2+ ions. The Cu2+/Cutotal ratio was determined. The optical absorption spectrum shows a broad, intense band attributed to Cu2+ ions and several weaker narrow bands attributed to Sm3+ ions. Photoluminescence (PL) and photoluminescence excitation (PLE) spectra as well as PL decay kinetics of Sm3+ and Cu+ ions were registered, analyzed, and discussed. The PL spectra show a broad band assigned to the 3d94s1 → 3d10 transition of Cu+ ions and four narrow bands assigned to the 4G5/26HJ (J = 5/2–11/2) transitions of Sm3+ ions. The observed changes in PL intensity, shortening of the Sm3+ lifetime and prolongation of the Cu+ lifetime were explained by energy transfer from Sm3+ → Cu+ and re-absorption of the Sm3+ emission by Cu2+ ions.

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来源期刊
Physical Chemistry Chemical Physics
Physical Chemistry Chemical Physics 化学-物理:原子、分子和化学物理
CiteScore
5.50
自引率
9.10%
发文量
2675
审稿时长
2.0 months
期刊介绍: Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.
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