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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Structural and optical studies on Dy3+ ions doped alkali lead borophosphate glasses for white light applications
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Structural and optical studies on Dy3+ ions doped alkali lead borophosphate glasses for white light applications

机译：DY3 +离子的结构和光学研究掺杂的白光应用碱性铅磷酸玻璃

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摘要

Dy3+ ions doped alkali lead borophosphate glasses with chemical compositions of (45-x) H(3)BO(3+)20P(2)O(5)+10Al(2)O(3)+10PbO+15Li(2)CO(3)+xDy(2)O(3) (where x = 0.0, 0.1, 0.25, 0.50, 1.0 and 2.0 wt%) have been prepared by conventional melt quenching technique and their physical, structural and spectroscopic behavior were studied systematically through XRD, FTIR, SEM with EDAX, optical absorption, luminescence and decay measurements. The density and refractive index increase with increasing of Dy3+ ions concentration and accordingly creating more non-bridging oxygen (NBOs) into glass matrix. X-ray diffraction study proves the amorphous nature of the prepared glasses. The FTIR study reveals the presence of BO4, PO4 vibrational groups and the bending of B-O-P, P-O-P units. The surface morphology and existence of elements in the prepared glasses have been studied through SEM with EDAX. The absorption spectra exhibit nine peaks with hypersensitive transition corresponding to H-6(15/2)-> F-6(11/2) at around 1270 nm. The Judd-Ofelt (JO) theory is used to calculate the calculated oscillator strengths, JO intensity parameters, radiative transition probabilities, stimulated emission cross-section and branching ratio for the present glasses. The JO intensity parameters follow the trend as Omega(2)>Omega(6)>Omega(4). The luminescence spectra of the glass sample displayed three emission peaks with high intensity are centered at 478 nm and 574 nm respectively. These attractive luminescence features of the proposed glasses in the white region verified using CIE 1931 diagram useful for the development of white light applications. The decay measurements of the prepared glasses for the state F-4(9/2) were measured and exhibits both single and non-exponential behavior.
机译：采用常规熔融淬火技术制备了化学成分为（45-x）H（3）BO（3）+20P（2）O（5）+10Al（2）O（3）+10PbO+15Li（2）CO（3）+xDy（2）O（3）（x=0.0,0.1,0.25,0.50,1.0和2.0 wt%）的掺Dy3+离子碱性硼磷酸铅玻璃，并通过XRD、FTIR、SEM、EDAX、光学吸收光谱、x射线衍射、x射线衍射和x射线衍射等手段系统地研究了其物理、结构和光谱行为，发光和衰变测量。密度和折射率随着Dy3+离子浓度的增加而增加，从而在玻璃基体中产生更多的非桥氧（NBO）。X射线衍射研究证明了所制备玻璃的非晶态性质。FTIR研究揭示了BO4、PO4振动基团的存在以及B-O-P、P-O-P单元的弯曲。用扫描电镜（SEM）和能谱仪（EDAX）研究了玻璃的表面形貌和元素的存在。在1270nm左右，吸收光谱显示出九个具有超灵敏跃迁的峰，对应于H-6（15/2）->F-6（11/2）。用Judd-Ofelt（JO）理论计算了所计算的振子强度、JO强度参数、辐射跃迁几率、受激发射截面和分支比。JO强度参数遵循ω（2）>ω（6）>ω（4）的趋势。玻璃样品的发光光谱显示出三个高强度的发射峰，分别集中在478nm和574nm。利用CIE 1931图验证了所提出的玻璃在白光区的这些有吸引力的发光特性，这些发光特性对于白光应用的开发非常有用。测量了制备的玻璃在F-4（9/2）状态下的衰变，并显示出单指数和非指数行为。

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