The Impact of Silver Codoping on Tb³⁺ Luminescence in Lithium Tetraborate Glasses.

IF 3.2 4区化学 Q2 CHEMISTRY, ANALYTICAL

Luminescence Pub Date : 2025-01-01 DOI:10.1002/bio.70074

I I Kindrat, B V Padlyak, A Drzewiecki, I M Teslyuk, V T Adamiv

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引用次数: 0

Abstract

Spectroscopic properties of Tb-doped and Tb-Ag codoped lithium tetraborate (LTB) glasses with Li₂B₄O₇ (or Li₂O-2B₂O₃) composition are investigated and analysed using electron paramagnetic resonance (EPR), optical absorption, photoluminescence (PL) and photoluminescence excitation (PLE) spectra, PL decay kinetics and absolute quantum yield (QY) measurements. PL spectra of the investigated glasses show numerous narrow emission bands corresponding to the ⁵D₄ → ⁷F_J (J = 6-0) and ⁵D₃ → ⁷F_J (J = 5-3) transitions of Tb³⁺ (4f⁸) ions. The most intense PL band of Tb³⁺ ions at 541 nm (⁵D₄ → ⁷F₅ transition) is characterised by a lifetime slightly exceeding 2.6 ms. PL spectra of the Ag-containing glass show two broad weakly resolved emission bands in the violet-green spectral range attributed to Ag⁺ ions and nonplasmonic Ag nanoclusters. Decay kinetics of these bands are nonmonoexponential, characterised by an average lifetime in the microsecond range. A significant enhancement of the PL intensity and PL QY of Tb³⁺ ions was observed in Tb-Ag codoped LTB glass in comparison with Tb-doped LTB glass. The excitation energy transfer (EET) mechanisms from Ag⁺ ions and Ag nanoclusters to Tb³⁺ ions were explored.

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银共掺杂对四硼酸锂玻璃中Tb3+发光的影响。

利用电子顺磁共振（EPR）、光学吸收、光致发光（PL）和光致发光激发（PLE）光谱、PL衰变动力学和绝对量子产率（QY）测量，研究和分析了含有Li2B4O7（或li20 - 2b2o3）成分的tb掺杂和Tb-Ag共掺杂四硼酸锂（LTB）玻璃的光谱特性。所研究玻璃的PL光谱显示出与Tb3+ (4f8)离子的5D4→7FJ （J = 6-0）和5D3→7FJ （J = 5-3）跃迁相对应的许多窄发射带。Tb3+离子在541 nm处（5D4→7F5跃迁）最强的PL波段，其寿命略大于2.6 ms。含银玻璃的PL光谱在紫绿色光谱范围内显示出两个宽的弱分辨发射带，归因于银离子和非等离子体银纳米团簇。这些波段的衰减动力学是非单指数的，其特征是平均寿命在微秒范围内。在Tb-Ag共掺杂的LTB玻璃中，Tb3+离子的PL强度和PL QY明显增强。探讨了Ag+离子和Ag纳米团簇向Tb3+离子的激发能转移机制。

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来源期刊

Luminescence 生物-生化与分子生物学

CiteScore

5.10

自引率

13.80%

发文量

248

审稿时长

3.5 months

期刊介绍： Luminescence provides a forum for the publication of original scientific papers, short communications, technical notes and reviews on fundamental and applied aspects of all forms of luminescence, including bioluminescence, chemiluminescence, electrochemiluminescence, sonoluminescence, triboluminescence, fluorescence, time-resolved fluorescence and phosphorescence. Luminescence publishes papers on assays and analytical methods, instrumentation, mechanistic and synthetic studies, basic biology and chemistry. Luminescence also publishes details of forthcoming meetings, information on new products, and book reviews. A special feature of the Journal is surveys of the recent literature on selected topics in luminescence.