单元石Sr2MgSi2O7:Ce/Tb/Sm的结构和发光特性适用于n-UVwLED
1Hubei Key Laboratory of Plasma Chemistry and Advanced Materials & Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan Institute of Technology, 430205, Wuhan, China. wubin.dai@wit.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|September 13, 2023
概括
这项研究开发了一种新的三化,Sr2MgSi2O7:Ce/Tb/Sm,用于高效的,可调色的白色发光二极管 (pc-wLED). 通过Na+和Ba2+共剂的增强可以提高光发光效率和稳定性,用于固态照明应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态照明 固态照明
- 发光的光度是非常的低.
背景情况:
- 用转换的白色发光二极管 (pc-wLED) 对于先进的固态照明至关重要.
- 开发具有可调节排放和热稳定的高效单相仍然是关键的研究挑战.
- 石Sr2MgSi2O7是应用的一个有前途的宿主材料.
研究的目的:
- 为了研究可调色光发光 (PL) 和三化Sr2MgSi2O7的热稳定性:Ce/Tb/Sm.
- 探索Na+和Ba2+联合兴奋剂对PL效率和排放特性的影响.
- 为了证明在pc-wLED设备中优化的潜力.
主要方法:
- 系统地研究三化Sr2MgSi2O7的结构和光谱特性 (静态/动态).
- 分析能量转移机制,包括Ce → Tb → Sm和金属对金属电荷转移 (MMCT).
- 使用优化的光和n-UV LED芯片制造和描述一个原型pc-wLED.
主要成果:
- 从Sr2MgSi2O7:Ce/Tb/Sm通过高效的能量传输实现了可调色的PL,包括白光发射.
- 通过促进兴奋剂的结合,Na+联合兴奋剂减少了缺陷,并提高了PL的效率.
- 通过改变晶体场分裂,蓝移排放和提高能量传输效率来调节PL的Ba2+辅助兴奋剂.
结论:
- 三级化Sr2MgSiO7:Ce/Tb/Sm体具有出色的色调性和热稳定性.
- 使用Na+和Ba2+的联合兴奋剂策略显著提高光发光的性能.
- 开发的pc-wLED显示了在固态照明中的实用应用的巨大潜力.
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