Long-Lasting Phosphorescence in BaSi2O2N2 : Eu2 + and Ba2SiO4 : Eu2 + Phases for X-Ray and Cathode Ray Tubes
Long-Lasting Phosphorescence in BaSi2O2N2 : Eu2 + and Ba2SiO4 : Eu2 + Phases for X-Ray and Cathode Ray Tubes
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DOI：
10.1149/1.3267513
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发表时间：
2010-02
影响因子：
3.9
通讯作者：
Meiyuan Wang;Xia Zhang;Z. Hao;X. Ren;Yongshi Luo;H. Zhao;Xiaojun Wang;Jiahua Zhang
中科院分区：
文献类型：
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作者：
Meiyuan Wang;Xia Zhang;Z. Hao;X. Ren;Yongshi Luo;H. Zhao;Xiaojun Wang;Jiahua Zhang
本文报道了用固相反应法合成的Ba 2SiO 4：0.01Eu2 + -xSi 3 N4（x = 0-1）和2BaCO 3 -ySi 3 N4：0.01Eu2+（y = 1/6-1）荧光粉的X射线和阴极射线管蓝绿色长余辉发光。通过调节Si 3 N4的含量，在BaSi 2 O2 N2（峰值在490 nm），Ba 2SiO 4（505 nm）和Ba 3SiO 5（590 nm）相中，Eu 2+可能是磷光源。2BaCO 3-ySi 3 N4：0.0 1 Eu 2+中Ba 2 SiO 4：Eu 2+相的强磷光是由于N取代0产生浅陷阱所致。而在Ba 2SiO 4：0.0 1 Eu 2+ -xSi 3 N4中，N优先与Ba 2SiO 4反应生成BaSi 2 O2 N2，从而表现出BaSi 2 O2 N2：Eu 2+相的强磷光，而Ba 2SiO 4：Eu 2+相的弱磷光。
We report the long-lasting bluish-green phosphorescence for X-ray or cathode ray tubes in the phosphors with compositions of either Ba 2 SiO 4 :0.01Eu 2+ -xSi 3 N 4 (x = 0-1) or 2BaCO 3 -ySi 3 N 4 :0.01Eu 2+ (y = 1/6-1) synthesized by a solid-state reaction. By tuning the Si 3 N 4 content, the phosphorescence may originate from Eu 2+ in BaSi 2 O 2 N 2 (peaking at 490 nm), Ba 2 SiO 4 (505 nm), and Ba 3 SiO 5 (590 nm) phases. The strong phosphorescence of the Ba 2 SiO 4 :Eu 2+ phase in 2BaCO 3-y Si 3 N 4 :0.01Eu 2+ is attributed to N substitution for 0 to generate a shallow trap. In Ba 2 SiO 4 :0.01Eu 2+ -xSi 3 N 4 , however, N prefers reacting with Ba 2 SiO 4 to form BaSi 2 O 2 N 2 , thereby exhibiting a strong phosphorescence of the BaSi 2 O 2 N 2 :Eu 2+ phase but a weak phosphorescence of the Ba 2 SiO 4 :Eu 2+ phase.