Ba12(BO3) 7F4 (LBBF) 晶体与Eu3+,Tb3+,Ce3+进行合:结构和发光特性
Tatyana B Bekker1,2, Alexey A Ryadun2,3, Alexey V Davydov1,2
1Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia. t.b.bekker@gmail.com.
Dalton transactions (Cambridge, England : 2003)
|June 2, 2023
概括
这项研究探讨了用稀土元素合的LiBa12(BO3) 7F4 (LBBF) 晶体的发光特性,以便在白色LED中潜在使用. 作为先进照明应用中的红色发射元件,LBBF:Eu3+显示出有前途.
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:
- 对白色发光二极管 (LED) 的新光的研究对于节能照明至关重要.
- 稀土合材料为光电子应用提供可调节的发光特性.
- Ba12(BO3) 7F4 (LBBF) 作为宿主材料的潜力正在被探索.
研究的目的:
- 为了研究LiBa12(BO3) 7F4 (LBBF) 单晶和多晶样品的发光特性.
- 评估用Eu3+,Tb3+和Ce3+合的LBBF在白色LED应用中的潜力.
- 了解LBBF:Eu3+中的晶体结构和兴奋机制.
主要方法:
- 单晶和多晶LBBF样本的合成和表征.
- 使用三价欧 (Eu3+), (Tb3+) 和 (Ce3+) 的兴奋剂和联合兴奋剂.
- 光发光谱学,X射线衍射 (XRD) 用于结构分析.
- 确定CIE坐标和相关的色温 (CCT).
主要成果:
- 解密了LBBF:Eu3+ (P42/mbc) 的晶体结构,揭示了异价替代 (3Ba2+ ← 2Eu3+ + 空位).
- 配合剂的LBBF:Eu3+,Tb3+,Ce3+和LBBF:Eu3+,Tb3+在日光附近呈现出高CCTs (9232K和4849K,分别) 的发光.
- 在395nm激发下,LBBF:Eu3+样本 (0.5重%和2重%Eu3+) 显示出强烈的红色辐射,具有高量子产量 (63%和60%).
结论:
- 用Eu3+合的LBBF显示出作为白色LED中复合的红色发射元件的巨大潜力.
- 观察到的发光特性表明它适合用于可调节的照明应用.
- 结构分析提供了对兴奋剂行为及其对发光效应的影响的见解.
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