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首页> 外文期刊>Physica, B. Condensed Matter >Judd-Ofelt analysis of luminescence emission from Zn_2SiO _4:Eu~3 nanoparticles obtained by a polymer-assisted solgel method
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Judd-Ofelt analysis of luminescence emission from Zn_2SiO _4:Eu~3 nanoparticles obtained by a polymer-assisted solgel method

机译：聚合物辅助溶胶凝胶法获得的Zn_2SiO _4：Eu〜3纳米粒子的发光发射的Judd-Ofelt分析

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In this research we prepared Zn_2SiO_4:Eu~3 phosphor nanopowders using a combination of solgel and combustion synthesis with the aim to examine the influence of synthesis conditions on the optical properties of the phosphor. As combustion fuels we used polyethylene glycol (PEG) with different average molecular weights, and the combustion was performed in two ways - in a microwave oven and a conventional furnace. Optical properties were examined by photoluminescence spectroscopy and spectra of all samples showed intense red emission, typical for ff electronic transitions of the Eu~3 ions. Emission decays exhibited classical one exponential behavior at longer times and nonlinear nature at short times, with average lifetimes varied from 0.49 to 0.71 ms between samples. JuddOfelt theory was applied to experimental data for the quantitative determination of optical parameters such as Ω_(2,4) JuddOfelt parameters, radiative and nonradiative transition rates and emission quantum efficiency. Calculated parameters vary moderately between samples prepared with different PEGs and combusted in different manner.
机译：在这项研究中，我们结合溶胶凝胶和燃烧合成法制备了Zn_2SiO_4：Eu〜3荧光粉纳米粉，目的是研究合成条件对荧光粉光学性能的影响。作为燃烧燃料，我们使用了平均分子量不同的聚乙二醇（PEG），并通过两种方式进行燃烧-在微波炉和常规炉中进行。通过光致发光光谱检查了光学性质，所有样品的光谱均显示出强烈的红色发射，这是Eu〜3离子的ff电子跃迁的典型现象。发射衰减在更长的时间表现出经典的一种指数行为，而在短时间表现出非线性特性，样本之间的平均寿命从0.49到0.71 ms不等。 JuddOfelt理论应用于实验数据，用于定量确定光学参数，例如Ω_（2,4）JuddOfelt参数，辐射和非辐射跃迁速率以及发射量子效率。在用不同的PEGs制备并以不同方式燃烧的样品之间，计算的参数会有适度的变化。

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