相关实验视频
Updated: Jun 17, 2025
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Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
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一种新的白色Y2(Ti0.8Hf0.2)2O7:由HfO2调节的Eu,在高温下呈现较低的颜色变化
Zhanwen Han1, Hongquan Yu1, Tianshuo Liu2
1Department of Physics, Dalian Maritime University, Dalian 116026, Liaoning, China.
概括
开发了新的白,Y2(Ti1-xHfx) 2O7:Eu,用于近紫外线LED照明. 这些光体具有出色的热稳定性和高颜色染性,非常适合先进的照明应用.
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:
- 接近紫外线 (NUV) 光激活的白对于节能LED照明至关重要.
- 开发具有高热稳定性和优良色彩染的光剂对于实际的LED应用是必不可少的.
研究的目的:
- 为了合成和表征新的可调色Y2(Ti1-xHfx) 2O7:Eu体.
- 为了研究这些光体的发光特性和热稳定性,用于LED应用.
- 为了评估制造的白色发光二极管 (WLED) 设备的性能.
主要方法:
- 固态合成 Y2 ((Ti1-xHfx) 2O7:Eu ,含有不同的 HfO2 和 Eu3+ 度.
- 光发光谱学用于激发和辐射光谱分析.
- 在高温下测试热稳定性和测量色差转移.
- 使用合成的WLED设备的制造和表征.
主要成果:
- 在340nm紫外线激发下成功合成了白色Y2(Ti0.8Hf0.2)2O7:Eu,在340nm紫外线激发下发出宽带.
- 确定了排放成分为Eu2+,Eu3+和HfO2缺陷排放,而HfO2引入促进了Eu2+的形成.
- 显示出优异的热稳定性,具有低色度转移 (2.83 × 10^-2 在 503 K) 和高 Ra 值 (90.2 在 383 K).
- 制造的WLED设备显示高质量的白光 (坐标为0.345,0.358) 和Ra的90.1.1.
结论:
- 开发的Y2(Ti0.8Hf0.2) 2O7:Eu体是基于NUV的WLED的有前途的候选者,因为它们的辐射范围广泛,Eu3+自降到Eu2+,以及优越的热稳定性.
- 低温度依赖的颜色变化和高颜色染指数使这些光灯非常适合要求高的LED照明应用.
- 这项研究有助于推进高效和高性能固态照明技术的发展.
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