Synthesis and characterization of Eu3+/Dy3+ codoped composite phosphors SrAl2Si2O8/SrAlSi1/2O7/2 via a one-pot nitrate-gel process
Synthesis and characterization of Eu3+/Dy3+ codoped composite phosphors SrAl2Si2O8/SrAlSi1/2O7/2 via a one-pot nitrate-gel process
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DOI：
10.1007/s10971-012-2704-z
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发表时间：
2012-03
影响因子：
2.5
通讯作者：
Zhengwu Lu;L. Weng;S. Song;Peixin Zhang;Qianqian Hou;X. Ren
中科院分区：
文献类型：
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作者：
Zhengwu Lu;L. Weng;S. Song;Peixin Zhang;Qianqian Hou;X. Ren
采用硝酸盐凝胶法合成了Eu 3+和Dy 3+共掺杂的SrAl 2Si 2 O 8/SrAlSi 1/2 O 7/2复合荧光粉。采用热分析、X射线衍射和红外光谱等方法研究了前驱体的热分解过程。Eu 3 +/Dy 3+共掺杂的SrAl 2Si 2 O 8/SrAlSi 1/2 O 7/2荧光粉在近紫外380 nm激发下，由前驱体热处理过程中自发相分离产生的复合基质可产生蓝光（436 nm）、蓝绿光（486 nm）、黄光（583 nm）和红光（617 nm）。研究了Dy 3+掺杂浓度对复合荧光粉结构、缺陷特征和发光性能的影响。
Composite phosphors SrAl2Si2O8/SrAlSi1/2O7/2codoped with Eu3+and Dy3+were synthesized via a simple one-pot nitrate-gel process. The thermal decomposition process of the precursor is investigated by thermal analysis, X-ray diffraction and infrared spectroscopy, respectively. The as-prepared Eu3+/Dy3+codoped SrAl2Si2O8/SrAlSi1/2O7/2phosphors could yield blue (436 nm), bluegreen (486 nm), yellow (583 nm), and red (617 nm) lights under near-UV 380 nm excitation from a composite matrix produced by spontaneous phase separation during heat treatment of the precursor. Moreover, the effects of Dy3+doping concentration on the structures, defect features, and luminescence properties of the composite phosphors were examined in detail.