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通过红移电荷传递带的红移,提高了E3+的热稳定性

Chang Liu¹, Song Qu¹, Chengzheng Jia¹

¹Department of Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China.

Inorganic chemistry

|December 13, 2025

概括

研究人员通过调整的度,提高了Eu3+化的热稳定性. 这提高了光学温度传感和固态照明应用的性能.

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:

具有电荷传输带 (CTB) 红移的光体中的反热火对于光学传感和固态照明至关重要.
控制红移大小以提高Eu3+化的热稳定性是一个重大挑战.

研究的目的:

研究P/V离子度调节对Eu3+化的反热火行为和光学特性的影响.
制定一种提高光学温度计热稳定性和性能的策略.

主要方法:

在Eu3+化中系统调整 (V) 度 (x = 0-1).
分析不同度的电荷转移频段 (CTB) 红移机制.
通过测量不同温度 (298 K和573 K) 的排放强度来评估热稳定性.
开发和验证单带比温度计模型.

主要成果:

在低含量 (x ≤ 0.25) 的情况下,红移归因于 (VO₄) ^3-振动水平的热量群.
在较高的含量 (x ≥ 0.5) 时,CTB能量下降主导红移.
观察到显著增强的热稳定性,在573K的发射强度是比298K高13.77倍 (对于x=1).
一个单带比温度计模型实现了高相对灵敏度 (5.023%K-1在298K).

结论:

调度有效控制红移机制,并增强了Eu3+化的热稳定性.
开发的温度计模型展示了高性能光学温度传感的潜力.
这项工作为设计用于热传感应用的先进发光材料提供了新的策略.

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