Comparative study of Sm3+ ions doped phosphate based oxide and oxy-fluoride glasses for solid state lighting applications

论文摘要

The physical and luminescent properties of Sm3+-doped oxide and oxy-fluoride phosphate glasses were investigated. The glass samples with chemical composition of 69 P2O5-10 BaO-10 ZnO-10 Gd2O3-1 Sm2O3 and 69 P2O5-10 BaO-10 ZnO-10 GdF3-1 Sm2O3 were prepared by conventional melt quenching technique. The prepared glass samples were characterized with density, molar volume, refractive index,FTIR, UV-Vis-NIR, photo luminesce nce, radio luminescence, decay time profile and CIE diagram. The density and refractive index of the oxide glass have higher values as compared to the oxy-fluoride glass.The FTIR spectra show the reduction of O-H group in oxy-fluoride glass. The characteristic peaks of Sm3+are observed at 360,372,402,438,419,473,944,1077,1227,1373,1474,1529 and 1585 nm in UV-VIS-NIR spectra. These peaks are related respectively to the transitions from ground state 6H5/2to4D3/2,6P7/2,6 P3/2, 4I11/2,6F11/2,6F9/2,6F7/2,6F5/2,6F3/2,6H15/2and6F1/2 excited states. From photoluminescence and radio-luminesce nce it is observed that the oxy-fluoride glass samples show better emission intensity than the oxide glass. The Judd-Ofelt theory（J-0 theory） was used to find J-O intensity Ωλ（λ = 2,4 and 6）parameters and radiative properties such as transition probability, stimulated emission cross section and branching ratios for titled glasses. The trend observed in the J-O parameters is Ω4>Ω2>Ω6. The transition probability,emission cross section and branching ratio have the highest values for the 4G5/2→6H7/2transition. The CIE coordinates of the prepared glass samples are positioned in the orange region and the CCT value is 3776.105 for oxide and oxyfluoride glass. The oxy-fluoride glass has shorter decay time as compared to the oxide glass and it is recorded to be 1.62 and 1.32 ms for oxide and oxy-fluoride respectively. According to the results obtained in this work, it is obvious that these glass samples can be good candidate materials for producing cool orange light.

论文目录

文章来源

类型: 期刊论文

作者: M.Shoaib,G.Rooh,R.Rajaramakrishna,N.Chanthima,N.Kiwsakunkran,H.J.Kim,J.Kaewkhao,S.Tuscharoen

来源: Journal of Rare Earths 2019年04期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 无机化工

单位: Department of Physics, Abdul Wali Khan University,Center of Excellence in Class Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University,Department of Physics, Kyungpook National University

基金: supported by the Nakhon Pathom Rajabhat University Thailand(PD1_2017)and National Council of Research Thailand(NRCT)

分类号: TQ171.1

页码: 374-382

总页数: 9

文件大小: 1549K

下载量: 15

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