| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1262116 | Journal of Rare Earths | 2013 | 4 Pages |
Li2Y4–xEux(WO4)7–y(MoO4)y red-emitting phosphors were synthesized by solid state reaction and characterized by powder X-ray diffraction (XRD) and photoluminescence (PL) spectrum. The excitation spectra showed that the phosphors could be efficiently excited by near-UV light of 395 nm. When the relative molar ratio of Mo/W was 7:0, and the optimum doped concentration of Eu3+ was 2.8 mol, the phosphor showed strong red emission lines at 615 nm corresponding to the forced electric dipole 5D0→7F2 transition of Eu3+. Compared with Na2Y2Eu2(MoO4)7 and K2Y2Eu2(MoO4)7, the fluorescence intensity of Li2Y1.2Eu2.8(MoO4)7 phosphor was the strongest. The CIE chromaticity coordinates of Li2Y1.2Eu2.8(MoO4)7 phosphor was calculated to be (0.66, 0.34).
Graphical abstractEmission spectra (λex=395 nm) of Li2Y1.2Eu2.8(WO4)7–y(MoO4)y phosphors with different WO42– doping ratios (y=0, 0.7, 1.4, 2.1, 2.8, 3.5, 4.2, 4.9, 5.6, 6.3, 7.0) (a) and Li2Y4–xEux(MoO4)7 phosphors with different Eu3+ doping ratios (x=0.4, 0.8, 1.2, 1.6, 2.0, 2.4, 2.8, 3.2, 3.6, 4.0) (b)Figure optionsDownload full-size imageDownload as PowerPoint slide
