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高效的稀土免费瓦纳酸用于WLED
Zhaojiang Liu1, Yujuan Dong1, Man Fu1
1College of Chemistry and Materials Engineering, Bohai University, Jinzhou, 121000, P. R. China. dongyujuan@qymail.bhu.cn.
Dalton transactions (Cambridge, England : 2003)
|October 31, 2023
概括
这项研究合成了与离子合的黄色绿色发射瓦纳酸. 优化的光显示了增强的发光和固态照明应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 瓦纳达酸对于固态照明至关重要.
- 兴奋剂可以调整的特性.
研究的目的:
- 合成和描述与Ta5+合的发射Ca5Mg4(VO4) 6 (CMV) 黄色绿色光体.
- 研究Ta5+度对发光特性的影响.
- 评估这些光剂在白色发光二极管 (WLED) 应用中的潜力.
主要方法:
- 合成的固态反应方法.
- 用X射线衍射 (XRD) 和瑞特维尔德精细化进行结构分析.
- 光发光 (PL) 和光发光激发 (PLE) 光谱用于光学表征.
- 测量发光寿命,量子效率和颜色坐标.
主要成果:
- 成功合成了具有石榴石结构的单相CMV:Ta5+.
- 光体呈现出明亮的黄色绿色辐射,其峰值在544nm,适用于365nm的LED芯片.
- 优化的兴奋剂 (0.5%Ta5+) 将发光强度提高了26.31%,量子效率提高了15.98%.
- 使用CMV:0.5%Ta5+制造的WLED设备显示出出色的色温 (4083K) 和CIE坐标 (0.3677,0.3409).
结论:
- 塔5+兴奋剂有效地增强了CMV光体的发光特性.
- 合成的CMV:Ta5+是固态照明中黄色绿色排放的有希望的候选者.
- 性能改善归因于Ta5+诱导的[VO4]3-四面体的扭曲.
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