在LaAlO3:Pr3+,Gd3+中通过陷工程和能量转移实现多模式和多色发光
Nimai Pathak1,2,3, Abdulelah Alolayan1, Kawsar Ali4
1Department of Chemistry, Illinois Institute of Technology, Chicago, 60616, IL, USA.
概括
我们开发了新型的Pr3+和Gd3+联合合的LaAlO光体,表现出多模式发光,包括持久发光. 这些先进的材料在数据存储和光疗等领域提供了多方面的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 发光的光度是非常的低.
背景情况:
- 在单一光器中实现多式发光对于先进的应用至关重要,但在色调和陷工程方面面临挑战.
- 之前对化的研究尚未完全解决多种发光现象的整合问题.
研究的目的:
- 设计和描述新型的Pr3+和Gd3+联合合的LaAlO (LAO:PG) 光器,并集成多式发光.
- 调查发光的潜在机制,包括能量转移动态和陷水平工程.
主要方法:
- 合成和表征Pr3+和Gd3+联合合的LaAlO.
- 光发光谱学用于分析下转换发光 (DCL) 和上转换发光 (UCL).
- 对持续发光 (PersL),光学刺激发光 (OSL) 和热刺激发光 (TSL) 的分析.
- 密度函数理论 (DFT) 计算以将缺陷与陷水平相关联.
主要成果:
- 在LAO:PG光器展现多模式发光,包括DCL (UV可见和NIR),UV-CUCL,和显着的PersL持续数分钟.
- 与Pr3+和Gd3+的联合剂使新的发光模式能够实现,并且与Pr3+单独剂的LAO相比,增强了持久发光.
- TSL的分析发现了五个不同的陷级别,DFT的计算支持了内在缺陷与这些陷之间的联系,解释了多模式发光.
结论:
- 开发的LAO:PG光器证明了集成发光功能的有希望的平台.
- 谨慎调节陷和能量传递动态是实现多种发光模式的关键.
- 这些具有应用在数据存储,光疗和防伪技术方面的潜力.
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