单独注射的Eu3+和联合注射的Eu3+/Sm3+ZnS量子点:结构,光学特性和能量转移
N T M Thuy1, T T T Huong2,3, N T Hien2
1Faculty of Physics, TNU - University of Education, Thai Nguyen, Vietnam.
Physical chemistry chemical physics : PCCP
|September 26, 2024
概括
欧 (Eu3+) 和萨马 (Sm3+) 离子被添加到硫化 (ZnS) 量子点 (QD) 中,以提高光学性能. 这些杂的QD显示热红色光辐射,适合各种应用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 量子点合成 量子点合成
背景情况:
- 半导体量子点 (QD) 提供可调节的光学特性.
- 用稀土离子染QD可以增强发光.
- Eu3+和Sm3+离子以其特有的发射光谱而闻名.
研究的目的:
- 合成单独合的Eu3+和联合合的Eu3+/Sm3+的ZnS QDs.
- 研究合成QDs的结构,形态和光学特性.
- 在ZnS QD中探索Sm3+和Eu3+离子之间的能量转移机制.
主要方法:
- 使用1 - 八度 (ODE) 溶剂进行湿化学合成.
- 使用X射线衍射 (XRD) 和X射线光电子谱学 (XPS) 的表征.
- 通过光发光 (PL) 光谱和贾德-奥菲尔特 (J-O) 参数的确定进行光学性能分析.
主要成果:
- 成功合成了具有混合结构的3-4纳米ZnS QDs,并添加了Eu3+和Sm3+.
- 通过Reisfeld近似和Inokuti-Hirayama模型,证实了从Sm3+到Eu3+离子的有效能量转移.
- 观测到具有长寿命的热红色光辐射,并确定了CIE颜色坐标.
结论:
- 配ZnS QDs由于高效的Sm3+到Eu3+能量转移,表现出有前途的发光特性.
- 合成的QD显示出在光伏,光催化和生物标志物中的应用潜力.
- 该研究提供了对半导体QD用于先进光学应用的稀土离子兴奋剂的见解.
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