Solid-state synthesis, characterization and luminescent properties of Eu3+-doped gadolinium tungstate and molybdate phosphors: Gd(2-x)MO6:Eux3+ (M = W, MO)
Solid-state synthesis, characterization and luminescent properties of Eu3+-doped gadolinium tungstate and molybdate phosphors: Gd(2-x)MO6:Eux3+ (M = W, MO)
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DOI：
10.1016/j.jssc.2008.07.008
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发表时间：
2008-10-01
影响因子：
3.3
通讯作者：
Chen, Hao-Hong
中科院分区：
文献类型：
--
作者：
Lei, Fang;Yan, Bing;Chen, Hao-Hong
在900℃和1300℃固相反应4 h下，成功合成了Gd(2-x)MO6:Eu-x(3+) （M = Mo， W）的钨酸钆和钼酸钆红色荧光粉。采用x射线粉末衍射仪（XRD）、TG-DSC、FT-IR、PL、UV-vis和SEM对产物进行了表征。室温光致发光表明，制备的Gd(2-x)MO6:Eu-x(3+) （M = Mo， W）具有较强的红光发射，这是由于Eu3+ ((5)Do -> F-7(J), J = 0,1,2,3的特征跃迁所致。4)对这些荧光粉。同时，(5)Do -> F-7(2)处于优势地位。研究了Gd(2-x)MO6:EUx3+ （M = Mo， W）体系中Eu3+的发射量子效率。XRD结果表明，Gd2WO6和Gd2MoO6均属于空间群为C2/c的单斜晶系[A， Bril， G. Blasse， J. Chem.]。物理学报，45 (1966):2350-2356 [a]。布里尔，G. Blasse， J. Chem。Phys. 45 1966) 2350-23561。SEM图像表明，Gd1.96WO:Eu-0.04（3+）的形状为平均直径约300 nm的聚集小颗粒，Gd1.96MoO6:Eu-0.04（3+）的形状为块状结构。(C) 2008 Elsevier Inc .版权所有
Red phosphors gadolinium tungstate and molybdate with the formula Gd(2-x)MO6:Eu-x(3+) (M = Mo, W) were successfully synthesized by the solid-state reaction at 900 and 1300 degrees C for 4 h, respectively. The products were characterized by an X-ray powder diffractometer (XRD), TG-DSC, FT-IR, PL, UV-vis and SEM. Room-temperature photoluminescence indicated that the as-prepared Gd(2-x)MO6:Eu-x(3+) (M = Mo, W) had a strong red emission, which is due to the characteristic transitions of Eu3+ ((5)Do -> F-7(J), J = 0, 1, 2, 3. 4) for these phosphors. Meanwhile, the (5)Do -> F-7(2) is in the dominant position. The emission quantum efficiency of Eu3+ in the Gd(2-x)MO6:EUx3+ (M = Mo, W) system has been investigated. The XRD results indicate that both Gd2WO6 and Gd2MoO6 belong to the monoclinic system with space group C2/c [A, Bril, G. Blasse, J. Chem. Phys. 45 (1966) 2350-2356] and 12/a [A. Bril, G. Blasse, J. Chem. Phys. 45 1966) 2350-23561, respectively. SEM images indicate that the shape of Gd1.96WO:Eu-0.04(3+) is aggregated small particles with a mean diameter of about 300 nm, and the shape of Gd1.96MoO6:Eu-0.04(3+) is block-like Structures. (C) 2008 Elsevier Inc, All rights reserved.