In-situ chemical co-precipitation composition of hybrid precursors and luminescence of Y1−xGdxNbO4: RE3+ (RE = Tb, Eu) micron crystalline phosphors
In-situ chemical co-precipitation composition of hybrid precursors and luminescence of Y1−xGdxNbO4: RE3+ (RE = Tb, Eu) micron crystalline phosphors
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DOI：
10.1016/j.jallcom.2007.02.098
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发表时间：
2008-05
影响因子：
6.2
通讯作者：
Xiuzhen Xiao;B. Yan
中科院分区：
文献类型：
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作者：
Xiuzhen Xiao;B. Yan
本文首先采用原位共沉淀法组装杂化前驱体，合成了不同Y / Gd比的Tb3+/Eu3+掺杂Y1−xgdxnbo4荧光粉。研究了这些荧光粉的发光光谱，以考察基质成分对其发光行为的影响。其中Eu3+的红色发射强度（5D0-7F2）最强，Tb3+的绿色发射强度（5D4-7F5）最强。此外，由于Eu3+或Tb3+的环境不同，所有化合物中5d0 - 7f2to5d0 - 7f1 （Eu3+）或5d4 - 7f5to5d4 - 7f6 （Tb3+）的相对强度比也不同。通过x射线衍射和扫描电镜对制备的样品进行了物相和粒度的表征，结果表明制备的样品具有良好的结晶状态，晶粒尺寸在微米范围内。
In this paper, firstly Tb3+/Eu3+-doped Y1−xGdxNbO4phosphors with different ratio of Y to Gd have been synthesized by the in-situ co-precipitation assembly of hybrid precursors. Luminescent spectra of these phosphors have been investigated in order to examine the host matrix compositional effects on the photoluminescent behaviors. The red emission (5D0–7F2) intensity of Eu3+was the strongest, and so was the green emission (5D4–7F5) intensity of Tb3+. Furthermore, the relative intensity ratio of5D0–7F2to5D0–7F1(Eu3+) or5D4–7F5to5D4–7F6(Tb3+) in all compounds are different due to the different environment of Eu3+or Tb3+. Phase and particle size of prepared samples were characterized by X-ray diffraction, scanning electric microscope, indicating that the resultant samples present good crystalline state and crystalline grain sizes in the range of micrometer.