一种新的梅利石类型稀土酸盐CdTbGaBB
Xuean Chen1, Jinyuan Zhang1, Weiqiang Xiao2
1Faculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology 100124 Beijing China xueanchen@bjut.edu.cn.
一种新的混合金属酸盐,CdTbGaB2O7,被合成和特征. 这种材料具有可调节的绿色到色红色排放,使其成为UV发光二极管 (LED) 的有希望的候选者.
科学领域:
- 固态化学 固态化学
- 材料科学 材料科学 材料科学
- 发光的阴影是什么意思
背景情况:
- 石家族化合物具有独特的晶体结构,适合光学应用.
- 稀土合光剂对于开发先进的照明技术至关重要.
研究的目的:
- 为了合成和表征一种新的混合金属酸盐,CdTbGaB2O7.7.
- 研究CdTb1-xSmxGaB2O7固体溶液的发光特性和色调性,用于UV w-LED应用.
主要方法:
- 首次合成的高温溶液方法.
- 单晶X射线衍射用于结晶结构的确定.
- 固态反应用于创建固体溶液.
- 进行X射线衍射 (XRD),扫描电子显微镜 (SEM),红外/拉曼光谱,X射线光电子光谱 (XPS) 和光发光 (PL) 进行表征.
主要成果:
- CdTbGaB2O7已成功合成,并被确定为具有特定3D框架结构的 melilite 家庭的新成员.
- 在370nm激发下,CdTb1-xSmxGaB2O7体同时呈现出绿色 (Tb3+) 和色 (Sm3+) 排放.
- 通过调整Sm3+兴奋剂度来实现从绿色到色-红色的色调,这表明了能量传递机制.
- 观察到CdTb0.995Sm0.005GaB2O7的量子产量 (QY) 为13.22%,具有良好的热稳定性 (在423 K与303 K相比保持94%的强度).
结论:
- 合成的CdTb1-xSmxGaB2O7材料显示出作为可调色光体的潜力.
- 这些光体适用于紫外白色发光二极管 (UV w-LED) 应用,因为它们的可调节发光和稳定性.
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