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在Cr3+激活花石中通过在热合层之间进行电子迁移来实现超高的热稳定性
Jianbang Zhou1, Tong Ye1,2, Qijian Zhu1,3
1Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, P. R. China.
Inorganic chemistry
|July 23, 2024
概括
这项研究开发了一种新型的激活近红外线 (NIR) ,具有增强的热稳定性. 这种新材料在高温下显示出更好的排放强度,为先进的NIR应用提供了一个有前途的替代方案.
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:
- 激活近红外 (NIR) 对于各种应用至关重要,但通常热稳定性差.
- 提高热稳定性对于扩大这些的实际使用至关重要.
研究的目的:
- 为了合成一种具有宽带NIR发射的新型Lu2CaGa4SnO12:Cr3+.
- 通过组合工程来增强 Cr3+ 激活的 NIR 的热稳定性.
- 研究改善热稳定性背后的机制.
主要方法:
- 合成 Lu2CaGa4SnO12:Cr3+ 和 Lu2+xCa1-xGa4+xSn1-xO12:Cr3+ 的固体溶液.
- 光发光 (PL) 特性和热火行为的表征.
- 分析晶体场强度和能量水平差异的分析.
主要成果:
- 成功合成了一种新的Lu2CaGa4SnO12:Cr3+,在750nm发射NIR辐射.
- 合成的PL强度随着温度的增加而显著下降.
- 在Lu2+xCa1-xGa4+xSn1-xO12:Cr3+中与Lu3+-Ga3+共同替代显著改善了热稳定性.
- 在425K时的排放强度达到优化样本在300K时的142%,显示出出色的热性能.
结论:
- 开发的Lu2+xCa1-xGa4+xSn1-xO12:Cr3+固体溶液提供可调节的热火性能.
- 改善的热稳定性归因于晶体场强度和能量水平差异的变化.
- 这项工作为开发高热稳定性宽带NIR光器提出了一个有前途的战略.
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