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首页> 外文期刊>Optical Materials >Down-conversion luminescence and shielding parameters of Dy~(3+): NFBT glass for white LED and radiation applications
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Down-conversion luminescence and shielding parameters of Dy~(3+): NFBT glass for white LED and radiation applications

机译：DY〜（3+）的下转换发光和屏蔽参数：用于白色LED和辐射应用的NFBT玻璃

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A new kind of dysprosium (Dy3+) ions doped niobium fluoro borotellurite (NFBT) glass with compositions (35- x )TeO2 + 30H3 BO3 + 15Nb2O5 + 10SrCO3 + 10CdF2 + x Dy 2O3 (where x = 0.05, 0.3, 0.5, 1, 2 and 3 in wt. %, hereafter refers as to Dy 3+ ions' concentration) was fabricated with melt quenching method and characterized through X-ray diffraction, physical (density (p), molar volume of oxygen (V o), and optical basicity ( th), etc.), visible absorption, excitation, emission and lifetime measurements. Its density increases while its molar volume decreases with increase of Dy3+ ions, which indicates that the glass becomes more compact. The absorption spectrum shows the various characteristic peaks of Dy3+ ions attributed to the transitions from the 6H 15/2 ground level to the different excited energy levels. The oscillator strengths and Judd-Ofelt intensity parameters (W l =2, 4 & 6) were articulated from the optical absorption spectrum. The photoluminescence spectrum reveals that this NFBT glass has several emission bands, corresponding to 4F 9/2 - 6H 15/2 (blue), 4F 9/2 - 6H 13/2 (yellow) and 4F 9/2 - 6H 11/2 (red) transitions, respectively. The emission intensity increased with Dy3+ ions concentration from 0.05 wt. % to 1 wt. %, after that the concentration quenching was observed for higher concentrations (2 & 3 wt. %). The non-exponential decay curves were analysed with Inokuti-Hirayama (IH) model ( S =6), indicating a nature of dipoledipole interaction between the donor and the acceptor of Dy3+ ions. The Commission International de'Eclairage (CIE 1931 (x , y) and CIE 1976 ( u , v )) coordinates and the correlated color temperature (CCT) values clearly show that the present glass can be useful in cool white light (CCT4000 K) region. Moreover, mass attenuation coefficient (mu / p), and effective atomic number (Z eff) parameters were also articulated through Phy-X/PSD program. Hence, the results indicate that the prepared glasses could be suitable for laser, smart white LED (1DyNFBT) and gamma ray shielding (3DyNFBT) applications.
机译：一种新的镝（DY3 +）离子掺杂铌氟硼牙素（NFBT）玻璃配合物（35- x）TeO 2 + 30H3 Bo3 + 15NB2O5 + 10sRCO 3 + 10CDF2 + X Dy 2O3（其中x = 0.05,0.3,0.5,1， 2和3在wt.％，下文中指以Dy 3 +离子的浓度为熔融淬火方法制备，并通过X射线衍射，物理（密度（P），氧气体积（V O），和光学碱度（TH）等），可见吸收，激发，发射和寿命测量。它的密度随着DY3 +离子的增加而降低，其摩尔体积随着DY3 +离子的增加而降低，这表明玻璃变得更加紧凑。吸收光谱显示Dy3 +离子的各种特征峰，其归因于从6H 15/2地面的过渡到不同的激发能级。振荡器强度和Judd-elt强度参数（Wl = 2,4＆6）从光学吸收光谱铰接。光致发光光谱显示，该NFBT玻璃具有几个发射带，对应于4F 9/2 - ＆ 6h 15/2（蓝色），4f 9/2 - ＆ 6h 13/2（黄色）和4f 9/2 - ＆ 6小时11/2（红色）过渡。发射强度随来自0.05重量的DY3 +离子浓度增加。 ％〜1 wt。 ％，之后观察到更高浓度（2＆3重量％）的浓度猝灭。用Inokuti-Hirayama（IH）模型（S = 6）分析非指数衰减曲线，表明供体与DY3 +离子的受体之间的偶极鲕脂相互作用的性质。委员会国际De'eclairage（CIE 1931（X，Y）和CIE 1976（U，V））坐标和相关的色温（CCT）值清楚地表明，目前玻璃可用于凉爽的白光（CCT＆GT; 4000 k）地区。此外，通过PHY-X / PSD程序阐述了质量衰减系数（MU / P）和有效原子数（Z型EFF）参数。因此，结果表明，制备的眼镜可以适用于激光，智能白色LED（1DYNFBT）和伽马射线屏蔽（3DYNFBT）应用。

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