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Updated: Sep 10, 2025
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Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
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发光和能量转移过程在Gd0.99Er0.01Al0.995Cr0.05O3
F Mselmi1, Abir Hadded1, Hajer Souissi1
1Laboratoire de Physique Appliquée, Faculté des Sciences, Université de Sfax 3000 Tunisia abir.hadded1994@gmail.com.
RSC advances
|August 27, 2025
概括
这项研究合成了加多氧化物 (GdAlO3),添加了 (Er3+) 和 (Cr3+). 这项研究揭示了影响光发光的能量传递机制,表明Cr3+离子是红色发射的关键.
科学领域:
- 材料科学
- 固态化学
- 发光光谱学
背景情况:
- 加多氧化物 (GdAlO3) 是发光应用的一个有前途的宿主材料.
- 使用稀土离子,如 (Er3+) 和过渡金属,如 (Cr3+) 可以改变其光学特性.
- 了解能量传输路径对于设计先进的光体至关重要.
研究的目的:
- 用Er3+和Cr3+联合合的GdAlO3进行合成和表征.
- 研究结构和光学特性,包括光发光.
- 阐明Er3+离子,内在缺陷中心和Cr3+离子之间的能量传递机制.
主要方法:
- 固态反应方法用于样本合成.
- 用X射线衍射进行结构分析.
- 导数吸收频谱适配 (DASF) 和第一导数反射率 (dR/dλ) 用于频段间隙的确定.
- 用于排放分析的光发光谱 (PL).
主要成果:
- 样品结晶成一个带宽间隙 (~5.9 eV) 的正方体结构 (Pbnm空间组).
- Gd0.99Er0.01AlO3表现出来自Er3+的绿色排放和来自内在缺陷的红色线.
- 由于能量转移到Cr3+,Gd0.99Er0.01Al0.995Cr0.05O3的绿色/红色排放量减少.
- 在697nm和726nm被确定为红色辐射的主要来源.
结论:
- 合成的材料具有宽带间隙,并表现出明显的发光特性.
- 从Er3+和缺陷中心向Cr3+离子进行有效的能量转移得到证实.
- 3+离子在配GdAlO3系统的红色辐射中起着重要作用,表明可调节的发光潜力.
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