Huang Jun, Yi Shuangping, Deng Yaomin, Xian Jieqiang, Zhang Lu
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Sep 5;148:324-7. doi: 10.1016/j.saa.2015.04.009. Epub 2015 Apr 11.
In this paper, we reported a series of Eu(3+) activated Sr2La2MgW2O12 phosphors synthesized by the solid state reaction method. X-ray diffraction analysis revealed that Sr2La2MgW2O12 doped with Eu(3+) was pure phase. Upon the 464 nm light excitation, Sr2La2MgW2O12:Eu(3+) phosphors exhibited a red emission centered at 613 nm, originated from the (5)D0-(7)F2 transition of Eu(3+) ions. The optimum concentration of Eu(3+) for the highest luminescence was found to be 20 mol%, and the critical distance was calculated to be 11.98Å. The Commission International de l'Eclairage (CIE) chromaticity coordinate of Sr2La1.8MgW2O12:0.20Eu(3+) was (x=0.626, y=0.374), which was closed to the standard of NTSC (x=0.670, y=0.330). The results indicated that Sr2La2MgW2O12:Eu(3+) could be a potential red phosphor for white light-emitting diodes (WLEDs).
在本文中，我们报道了一系列通过固态反应法合成的Eu(3+)激活的Sr2La2MgW2O12荧光粉。X射线衍射分析表明，掺杂Eu(3+)的Sr2La2MgW2O12为纯相。在464 nm光激发下，Sr2La2MgW2O12:Eu(3+)荧光粉呈现出以613 nm为中心的红色发射，源于Eu(3+)离子的(5)D0-(7)F2跃迁。发现发光最强时Eu(3+)的最佳浓度为20 mol%，计算得到的临界距离为11.98Å。Sr2La1.8MgW2O12:0.20Eu(3+)的国际照明委员会(CIE)色度坐标为(x = 0.626, y = 0.374)，接近NTSC标准(x = 0.670, y = 0.330)。结果表明，Sr2La2MgW2O12:Eu(
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