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宽带近红外LiTi2(PO4)3:xCr3+通过多个地点的占用实现
Jin Zou1, Daoyun Zhu2, Zhongfei Mu2
1School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Physical chemistry chemical physics : PCCP
|March 3, 2025
概括
研究人员开发了新的近红外 (LiTi2(PO4)3:Cr3+) 以实现高效的宽带发射. 这些材料对生物成像和食品检测的应用非常有希望,尽管热稳定性需要进一步改进.
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的.
背景情况:
- 近红外转换发光二极管 (NIR pc-LED) 对于生物成像和食品检测至关重要.
- 开发高效,具有成本效益和宽带NIR光器,具有足够的频谱覆盖,是一个重大挑战.
研究的目的:
- 为了合成和表征一系列宽带近红外,LiTi2(PO4) 3:xCr3+ (LTP).
- 分析它们的晶体结构,发光特性和热火机制.
- 评估它们在NIR pc-LED应用中的潜力.
主要方法:
- 合成不同的Cr3+度的LiTi2(PO4)3:xCr3+.
- 分析晶体结构,光发光 (PL) 光谱和发光强度.
- 对热火效应的研究和用于应用测试的设备制造.
主要成果:
- 发现最佳的Cr3+度为x = 0.07,产生最大的发光强度.
- LTP:0.07Cr3+在455nm激发下从700-1250nm (峰值为890nm,FWHM为210nm) 呈现出宽带辐射.
- 宽带发射归因于Cr3+在弱晶场中占据了多个位置;在373K的热稳定性是室温强度的41%.
结论:
- 合成的LiTi2(PO4)3:Cr3+体显示出高效的宽带NIR发射.
- 该材料显示了生物医学成像,夜视和食品检测等领域的应用潜力.
- 为了广泛的商业应用,需要进一步提高热稳定性.
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