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Updated: Jul 9, 2025

Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
在强的色-红色发射 CeO2:Sm3+,Eu3中高效率的能量转移
Nguyen Van Hai1, Nguyen Thi Khanh Linh1, Dinh Thi Hien1
1Faculty of Chemistry, Hanoi National University of Education 136 Xuan Thuy Road, Cau Giay District Hanoi Viet Nam.
在二氧化 (CeO2) 中,高效率的能量从 (Sm3+) 转移到欧 (Eu3+),增强了红光的发射. 这项研究证实了Sm3+到Eu3+的能量传输,达到84%的效率.
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:
- 二氧化 (CeO) 是的通用宿主材料.
- 与 (Sm3+) 和欧 (Eu3+) 等稀土离子联合可以调整发光特性.
- 了解能量转移机制对于优化性能至关重要.
研究的目的:
- 合成和描述单独的Sm3+和Sm3+/Eu3+联合化的CeO2.
- 调查CeO2中从Sm3+到Eu3+的能量传输 (ET) 效率.
- 探索这些的潜力,以有效发射红光.
主要方法:
- 溶液燃烧合成,然后进行热处理.
- 用于晶体结构分析的X射线衍射 (XRD).
- 扫描电子显微镜 (SEM) 用于形态学.
- 能量分散式X射线光谱 (EDX) 用于元素组成.
- 光发光谱学用于发光特性和衰变动力学分析.
主要成果:
- 成功合成单相立方CeO2合物与Sm3+以及与Sm3+/Eu3+联合合.
- 在360nm激发下,Sm3+单独合的CeO2在573nm和615nm时呈现出黄色红色的辐射.
- CeO2:Sm3+,Eu3+的体在631 nm时显示出主导的红色发射,这是由于Sm3+向Eu3+ (84%) 的高效能量转移.
- 德克斯特理论分析表明,能量转移的四极-四极相互作用机制.
结论:
- 从Sm3+到Eu3+在CeO2中实现了高效的能量传输.
- 与Sm3+和Eu3+联合使用CeO2是提高Eu3+排放效率的有效策略.
- 这些光剂在需要高效的红光发射的应用中表现有前途.
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