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首页> 外文期刊>Optical Materials >Optical characterization and Judd-Ofelt analysis of Pr~(3+) ions in sol-gel derived zirconia/polyethylene glycol composite
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Optical characterization and Judd-Ofelt analysis of Pr~(3+) ions in sol-gel derived zirconia/polyethylene glycol composite

机译：溶胶-凝胶法氧化锆/聚乙二醇复合物中Pr〜（3+）离子的光学表征和Judd-Ofelt分析

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摘要

The photoluminescence characteristics of praseodymium (Pr3+) doped zirconia/polyethylene glycol (ZrO2/PEG) samples were studied using optical absorption and emission spectra. The optical properties were theoretically analysed using standard and modified Judd-Ofelt (J-O) models. The oscillator strength of the observed transitions and J-O intensity parameters were calculated using these J-O models. The radiative properties such as radiative transition probability (A(T)), branching ratio (beta(R)), stimulated emission cross-section (sigma(e)) and gain band width (sigma(e) x Delta lambda(eff)) for the excited states of Pr3+ in ZrO2/PEG composite have been determined. The experimental branching ratios obtained from the emission spectra were compared with the theoretical values. The excitation spectra of Pr3+ doped samples show overlapping of Pr3+ excitation peak at 448 nm at the end of the broad excitation band of the host, indicating the charge transfer between the host and Pr3+ ions. Luminescence decay analysis confirmed concentration quenching in the prepared samples and the lifetime values are found to be in the microsecond range. (C) 2017 Elsevier B.V. All rights reserved.
机译：利用光吸收和发射光谱研究了（（Pr3 +）掺杂的氧化锆/聚乙二醇（ZrO2 / PEG）样品的光致发光特性。使用标准和改进的Judd-Ofelt（J-O）模型对光学特性进行了理论分析。使用这些J-O模型计算观察到的跃迁的振荡器强度和J-O强度参数。辐射特性，例如辐射跃迁概率（A（T）），分支比（beta（R）），受激发射截面（sigma（e））和增益带宽（sigma（e）x Delta lambda（eff） ）已经确定了ZrO2 / PEG复合物中Pr3 +的激发态。从发射光谱获得的实验支化比与理论值进行比较。 Pr3 +掺杂样品的激发光谱在主体的宽激发带末端显示448 nm处Pr3 +激发峰的重叠，表明主体与Pr3 +离子之间的电荷转移。发光衰减分析证实了所制备样品中的浓度猝灭，并且发现寿命值在微秒范围内。 （C）2017 Elsevier B.V.保留所有权利。

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