蓝光激活EU2+-Doped绿色超稳定持久发光材料用于紧急照明
Daming Li1,2, Shoulian Guo1,2, Lina An1,2
1School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining, China.
概括
新的持久发光光体,Ca8-xMg3AlGaSi7O28:x%Eu2+可以被蓝光激发. 这些材料对安全和防伪技术的应用有前途.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 持久发光 (PL) 材料对于安全,保安和防伪应用至关重要.
- 当前的PL材料通常需要紫外线激发,这限制了它们的实际使用.
- 开发可见光,特别是蓝光可激发的光是一种重要的研究目标.
研究的目的:
- 为了合成和描述基于Ca8xMg3AlGaSi7O28:x%Eu2+的新型持久发光光体 (PLP).
- 研究这些新开发的PLP的结构,光学和发光性质.
- 评估这些蓝光刺激的潜在应用.
主要方法:
- 合成的高温固态反应方法.
- 瑞特维尔德精细化用于晶体结构分析 (Rwp=7.85%,Rp=5.36%,χ2=2.12).
- 分散反射光谱和热发光分析以确定光学带隙和陷深度.
主要成果:
- 成功合成了发出Ca8xMg3的明亮绿色光的AlGaSi7O28:x%Eu2+.
- 确定了具有CaO8多面体的空间组P-421m的晶体结构.
- 在CMAGSO:0.1%Eu2+.中计算出光带能量 (Eg) 约为4.02 eV.
- 确定了一个单一的陷层,深度在0.65和0.66 eV之间.
结论:
- 合成的Ca8-xMg3AlGaSi7O28:x%Eu2+体表现出高效的蓝光激发和持久的发光.
- 这些材料具有适合先进应用的结构和光学性能.
- 这些体显示出在安全系统,信息加密和防伪技术中使用的巨大潜力.
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