白光LED用铕掺杂硼铋钙玻璃的结构与光学性能

发布时间：2018-06-24 12:26

本文选题：发光材料 + 红光发射　；参考：《无机化学学报》2017年05期

【摘要】：采用熔融冷却法制备了铕掺杂的硼铋钙玻璃。研究了不同硼铋比(n_B/n_(Bi))和钙离子浓度条件下的密度、摩尔体积、折射率等物理性质,分析了玻璃的结构、光学性质和热稳定性。实验结果表明,Eu~(3+)较好的熔融于玻璃中,形成发光中心,在465 nm蓝光激发下,613 nm处有较为强烈的发射,光谱强度值随nB/nBi变化不明显,但随Ca O浓度升高而逐渐递减。玻璃结构总体呈现非晶态,对称性相对较低,结构致密程度和对称性均随nB/nBi的降低而降低,随CaO浓度的升高而升高。玻璃结构主要组成为[BO_3]三角体、[BiO_3]三角体,[BO4]四面体和[BiO_6]八面体,不存在[BO_3]组成的硼六元环。研究结果表明,此系列硼铋钙玻璃能有效匹配蓝光芯片发射红光,且具有熔点低、热稳定较好、折射率相对适宜的特点。
[Abstract]:The boron bismuth calcium glass doped with europium was prepared by melt cooling method. The physical properties of density, molar volume and refractive index at different ratios of bismuth boron and calcium ions were studied. The structure, optical properties and thermal stability of glass were analyzed. The experimental results show that EU ~ (3) melts well in glass to form luminescent centers, and there is a strong emission at 613 nm under the excitation of 465nm blue light. The spectral intensity does not change obviously with NB / nBi, but decreases gradually with the increase of Cao concentration. The glass structure is amorphous, and the symmetry is relatively low. The density and symmetry of glass structure decrease with the decrease of NB / nBi, and increase with the increase of Cao concentration. The glass structure is mainly composed of [Bos _ 3] triangle, [Bio _ s _ 3] triangle, [BO _ 4] tetrahedron and [Bio _ 6] octahedron. The results show that the series of boron bismuth calcium glasses can effectively match the red light emitted by blue light chips, and have the characteristics of low melting point, good thermal stability and relatively suitable refractive index.
【作者单位】：江西理工大学材料科学与工程学院;江西理工大学冶金与化学工程学院;
【基金】：江西省基金项目(No.GJJ150636,2014ZBAB206006) 江西理工大学优秀博士基金项目(No.YB2016008)资助
【分类号】：TQ171.7

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