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缺陷补偿和间隔电荷转移基于状态的Pr³⁺-doped niobate抗热灭光体

Chunwei Yang¹, Yanmei Xin¹, Jianxia Liu¹

¹Department of Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China. guoning@usst.edu.cn.

Chemical communications (Cambridge, England)

|June 12, 2024

概括

Sr2+/Ca2+离子替代增强了Sr2−Ca2−Nb2−O7的热稳定性:Pr3+. 这种双调制策略优化了缺陷和间隔电荷转移 (IVCT) 状态,以提高性能.

科学领域:

材料科学材料科学材料科学
固态化学固态化学
发光的阴影是什么意思

背景情况:

高热稳定性对于用于先进照明和显示应用的光剂至关重要.
缺陷工程和电荷转移状态的操纵是提高特性的关键策略.
基酸盐 (Sr2Nb2O7) 与酸 (Pr3+) 合是一种有前途的材料.

研究的目的:

调查Sr2+/Ca2+离子替代对Sr2-x/Cax/Nb2/O7的热稳定性的影响:Pr3+.
通过离子替代来探索缺陷状态和间隔电荷转移 (IVCT) 的同时调节.
开发一种双调制策略,以提高的热稳定性.

主要方法:

合成Sr_2-xCa_xNb₂O₇:Pr³⁺的光剂与不同的Ca²⁺度.
使用诸如X射线衍射 (XRD),光发光 (PL) 光谱和热分析等技术进行表征.
缺陷结构和间隔电荷转移 (IVCT) 机制的分析.

主要成果:

2+/2+联合剂有效调节的缺陷景观和间隔电荷转移 (IVCT) 状态.
这种替代导致Sr_2-xCa_xNb₂O₇:Pr³⁺的热稳定性显著提高.
观察到调制缺陷/IVCT状态与改善的热性能之间存在明显的相关性.

结论:

拟议的双调制策略利用Sr2+/Ca2+离子替代是一种可行的方法,可以提高的热稳定性.
了解和控制缺陷和IVCT状态对于设计高性能光剂至关重要.
这些发现有助于开发更坚固,更高效的发光材料,用于苛刻的应用.

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