Structural and photoluminescent properties of BaxZn1−xMoO4:Eu3+ phosphors synthesized by solid-state reaction method
Structural and photoluminescent properties of BaxZn1−xMoO4:Eu3+ phosphors synthesized by solid-state reaction method
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DOI：
10.1007/s10854-014-2539-1
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Daqiang Hu;Ying Wang;Weiliang Huan
中科院分区：
文献类型：
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作者：
Daqiang Hu;Ying Wang;Weiliang Huan
在空气气氛中用固相反应法合成了BaxZn1−xMoO4：Eu3+(0.1%≤_x：≤_(0.7))红色荧光粉。用X射线衍射仪和拉曼光谱对荧光粉的结构进行了表征。用光致发光(PL)光谱研究了荧光粉的光致发光性质。实验结果表明，Ba2+的引入增强了615 nm的发射。不同Ba2+/Zn2+比的钼酸盐荧光粉的光致发光性能也发生了相应的变化。系统地讨论了光致发光强度随Ba2+浓度以及不同激发波长的变化。最佳组成为x=0.5时，BaxZn1−xMoO4：Eu3+荧光粉具有良好的发光性能，在615 nm处的发光强度约为ZnMoO4：Eu3+的3倍，可作为紫外光和蓝筹片激发的红色荧光粉应用于白色发光二极管。
BaxZn1−xMoO4:Eu3+(0.1 ≤ x ≤ 0.7) red phosphors were synthesized at the temperature of 800 °C by solid-state reaction method in air atmosphere. The structures of the phosphors were characterized by X-ray diffraction and Raman spectra. Photoluminescence (PL) spectra were also used to investigate the photoluminescent properties of the phosphors. The experimental results indicated that the introduction of Ba2+enhanced the emission at 615 nm. The different Ba2+/Zn2+ratios of the molybdate phosphors caused the corresponding changes of photoluminescent properties. The variation of photoluminescent intensity with Ba2+concentration as well as with different excitation wavelengths was discussed systematically. BaxZn1−xMoO4:Eu3+phosphors with the optimal compositions of x = 0.5 exhibited satisfactory and excellent PL and the intensity of the emission at 615 nm was about three times stronger than that of ZnMoO4:Eu3+, which could be applied as red-emitting phosphors excited by ultra-violet and blue chips in white light-emitting diodes.