摘要
研究了峰值波长651nm的红色发光材料(CaO)20.68(MgO)1.32(SiO2)4S2∶Eu2+,Dy3+的制备及发光特性。通过XRD分析表明硫气氛中合成的材料为具有硫成分的硅酸盐相。红光发射带为硫元素进入晶格后在发光中心周围形成了类似长余辉材料CaS∶Eu2+,Cl-的局域结构。这也使材料具有了硫化物长余辉材料的发射光谱特征和硅酸盐材料高化学稳定性和高亮度的优点。热释光测量揭示它可能是一种潜在的红色长余辉材料。
Preparation and luminescence character of a red emission material （ CaO ）20.68 （ MgO ）1.32 （SiO2）4S2 ：Eu^2＋, Dy^3＋, which has a emission band centered at 651 nm were described in detail. XRD analysis shows that the obtained product is sulfur-bearing silicate. The red emission band indicates the local structure of luminescence center is quite similar with the traditional long-afterglow phosphor CaS：Eu^2＋ Cl-. This structure makes the phosphor colligate both merits of the sulfide phosphor and silicate phosphor. Thermoluminescence curve indicates that this material could be a latent red emission long-afterglow phosphor.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2007年第1期51-54,共4页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金(10404028)
国家科技部863项目(2002AA324060)资助项目
关键词
红光发射
硅酸盐
硫化物
长余辉
稀土
red emission
silicate phosphor
sulfide phosphor
long-afterglow
rare earths
