荧光粉
光致发光
材料科学
扫描电子显微镜
发光
光致发光激发
拉曼光谱
单斜晶系
分析化学(期刊)
钨酸盐
发射光谱
傅里叶变换红外光谱
透射电子显微镜
粉末衍射
光学
谱线
光电子学
化学
晶体结构
纳米技术
结晶学
物理
天文
冶金
复合材料
色谱法
作者
Yongqing Zhai,Meng Wang,Qian Zhao,Jiabao Yu,Xuemin Li
标识
DOI:10.1016/j.jlumin.2015.11.037
摘要
ZnWO4:Eu3+,Dy3+ white light-emitting phosphors were prepared by a hydrothermal method followed with calcination process. The as-synthesized phosphors were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectrum, Raman spectra, scanning electron microscope (SEM), transmission electron microscope (TEM), diffused reflectance spectra, photoluminescence excitation and emission spectra, and photoluminescence decay curves. Furthermore, external quantum efficiency of ZnWO4:Eu3+,Dy3+ was determined. The results showed that the obtained phosphors have monoclinic wolframite structure. The particles of the phosphors was nearly spherical in shape, and the particle size was about 70–100 nm. Upon excitation at UV light, the white light-emitting can be obtained by combining the blue–green emission of tungstate group and characteristic emission of Eu3+ and Dy3+. Based on the excitation/emission spectra and decay curves, the energy transfer and photoluminescence mechanism for ZnWO4:Eu3+, Dy3+ system were discussed.
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