| SrAl2O4∶Eu2+，Dy3+晶格点缺陷的形成及其在发光材料中的作用 |
| Formation and Roles of Point Defects in SrAl2O4∶Eu2+，Dy3+ Phosphors |
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| 摘要: 采用高温固相法合成了具有不同点缺陷的SrAl2O4∶Eu2+，Dy3+发光粉。通过余辉衰减特性、激发光谱与热致发光性能测试，研究了晶格点缺陷在发光材料中的作用。结果表明，DySr·对长余辉发光性能有很大的影响，可以作为具有合适深度的电子陷阱；氧离子空位(VO··)不能作为具有合适深度的电子陷阱，但可增加电子陷阱Dy3+ |
| 关键词: 铝酸盐 发光材料 晶格缺陷 余辉 |
| 基金项目: |
| Abstract: The SrAl2O4∶Eu2+，Dy3+ phosphors containing different point defects were synthesized by solid-state reaction method. The roles of crystal point defects in SrAl2O4∶Eu2+，Dy3+ phosphors were studied by comparing afterglow decay properties, excitation spectra and thermoluminescence of different samples. The results show that DySr· plays an important role in persistent luminescence of SrAl2O4∶Eu2+，Dy3+ phosphors. It can serve as an effective electron trap having apprepriate depth for persistent luminescence. VO·· can not serve as the electron trap with an appropriate depth, but can increase the trap depth of the DySr·. There is interaction between the Dy3+(DySr·) and the Eu2+(EuSr×), and only if the distance between them is close enough, can DySr· become effective electron trap. The VSr″ can become hole trap, but the change of its concentration in phosphors does not arouse the obvious change of persistent luminescence. |
| Keywords: aluminate luminescent material crystal defect afterglow |
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| 吕兴栋,舒万艮.SrAl2O4∶Eu2+，Dy3+晶格点缺陷的形成及其在发光材料中的作用[J].无机化学学报,2006,22(5):808-812. |
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