在BaSO4:V5+,Eu3+中的表面陷的强烈红色光及其应用
S Varalakshmi1, Arunachalam Lakshmanan1, L Sangeetha1
1Department of Physics, Saveetha Engineering College, Chennai, India.
Luminescence : the journal of biological and chemical luminescence
|November 24, 2024
概括
与和欧 (BaSO4:V5+,Eu3+) 合的硫酸显示出对白色LED具有有前途的红色特性. 它的可调节发光也可以实现高达180°C的非接触温度计.
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:
- 硫酸 (BaSO4) 是的常见宿主格子.
- 用过渡金属和稀土元素进行注可以调整发光特性.
- 了解兴奋剂效应对于开发新光学材料至关重要.
研究的目的:
- 用瓦纳 (V5+) 和欧洲 (Eu3+) 合的BaSO4进行合成和特征化.
- 为了研究V5+和Eu3+补充剂之间的发光特性和相互作用.
- 评估BaSO4:V5+,Eu3+作为白色LED的红色和发光温度计的潜力.
主要方法:
- 在1000°C的空气中合成BaSO4:V5+和BaSO4:Eu.
- 与V5+和Eu3+进行联合兴奋剂,研究它们的相互作用.
- 光发光 (PL) 谱学用于分析辐射光谱和取决于温度的行为.
主要成果:
- 由于V5+-O2−的电荷转移,BaSO4:V5+呈现出蓝绿色的辐射 (495nm).
- BaSO4:Eu 显示了 Eu2+ (375 nm) 和 Eu3+ (619 nm) 的光.
- 的联合兴奋剂增强了Eu3+的排放,同时灭了Eu2+的排放.
- 欧联合兴奋剂增强了Eu3+兴奋剂的效率和红移排放.
- BaSO4:V5+,Eu3+具有强烈的红色辐射 (619 nm),与商业相美.
- 不同于V5+排放,Eu3+排放具有低热火率,最高可达210°C.
- Eu3+与V5+光的比率随着温度 (30°C180°C) 的增加而增加.
结论:
- BaSO4:V5+,Eu3+是白色LED的有前途的红色,因为它具有高效和热稳定的Eu3+排放.
- 取决于温度的发光率使其可用作非接触式发光温度计.
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