在不相称调制的CaGd2中发光和传输行为:Yb/Er
Yinghan Wang1, Zeyue Zhang2, Guohong Cai2
1State Key Lab of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
The journal of physical chemistry letters
|November 6, 2024
概括
发光材料的热火因离子迁移在300°C以上而恶化,激活声子并增加散射. 这项研究揭示了CaGd2(MoO4)4:Yb/Er中的声子散射动态,这对于设计强大的红外发射器至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 发光的阴影是什么意思
背景情况:
- 热灭通过产生声子来降低发光材料的效率.
- 波传输在热火中的作用经常被忽视,特别是在复杂的结构中.
- 不相称的石结构显示出发光的前景,但需要了解热行为.
研究的目的:
- 在CaGd2(MoO4)4:Yb/Er中研究近红外辐射的热火动力学.
- 阐明声子传输和散射对发光效率的影响.
- 为开发热稳定的发光材料提供见解.
主要方法:
- 电导率,发光强度,热导率和拉曼散射的温度依赖性研究.
- 对声子激活和散射机制的分析.
- 研究离子迁移对材料性能的影响.
主要成果:
- 在电导率,发光,热导率和拉曼散射中观察到明显的温度依赖的变化.
- 在300°C以上的热诱导的离子迁移激活了声子,并增强了声子缺陷散射.
- 观察到Er3+排放水平的热导率降低和加速的多声波放松.
结论:
- 在这种系统中,热诱导的离子迁移是发光火的关键因素.
- 波散射动力学显著影响热火.
- 这些发现对于设计用于光学应用的耐热近红外发光材料至关重要.
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