荧光强度比技术及其可靠性

IF 2.4 3区化学 Q3 CHEMISTRY, ANALYTICAL

Methods and Applications in Fluorescence Pub Date : 2022-05-17 DOI:10.1088/2050-6120/ac70ab

Vishab Kesarwani, V. K. Rai

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引用次数: 9

摘要

本文报道了熔融淬火法制备1.0 mol% Er3+/2.0 mol% Yb3+掺杂/共掺杂玻璃的光吸收和上转换(UC)研究。用XPS和XRF分析分别确定了所制玻璃的元素和组成。利用吸收光谱计算了Judd-Ofelt强度参数，并利用该参数预测了Er_O键的性质、跃迁概率、分支比和辐射寿命。CIE的研究显示出非颜色可调和高纯度的绿色发光(94.2%)。在三种不同的泵浦功率密度下，记录了2.0 mol% Yb3+敏化玻璃的温度依赖性UC发射光谱，以建立可靠的基于FIR的温标。此外，温度相关光谱的Arrhenius拟合表明，共掺杂玻璃中绿色发光的热猝灭程度较低。

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Fluorescence intensity ratio technique and its reliability

The present article reports the optical absorption and upconversion (UC) studies of 1.0 mol% Er3+/2.0 mol% Yb3+ doped/codoped glasses prepared by melt-quenching technique. The elements present and the composition of the prepared glass have been confirmed from XPS and XRF analysis respectively. Judd-Ofelt intensity parameters have been calculated using the absorption spectrum which is further utilized to predict the nature of Er_O bond, the transition probabilities, branching ratios and radiative lifetimes. The CIE study shows non-colour tunable and highly pure green emission (94.2%). The temperature-dependent UC emission spectra of the 2.0 mol% Yb3+ sensitized glass have been recorded at three different pump power densities to establish a reliable FIR based temperature scale. Furthermore, the Arrhenius fitting of the temperature-dependent spectra reveals low thermal quenching of green luminescence in the codoped glass.

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来源期刊

Methods and Applications in Fluorescence CHEMISTRY, ANALYTICALCHEMISTRY, PHYSICAL&n-CHEMISTRY, PHYSICAL

CiteScore

6.20

自引率

3.10%

发文量

期刊介绍： Methods and Applications in Fluorescence focuses on new developments in fluorescence spectroscopy, imaging, microscopy, fluorescent probes, labels and (nano)materials. It will feature both methods and advanced (bio)applications and accepts original research articles, reviews and technical notes.