The Enhancement of 1.5 mu m Near Infrared Luminescence in Er3+ and Yb3+ Codoped Y2O3 Nanocrystalline

	The Enhancement of 1.5 mu m Near Infrared Luminescence in Er3+ and Yb3+ Codoped Y2O3 Nanocrystalline
其他题名	论文其他题名
	Meng Q. Y.; Chen B. J.; Lu S. C.; Sun J. T.; Qu X. R.
	2010
发表期刊	Spectroscopy and Spectral Analysis
ISSN	1000-0593
卷号	30 期号:5 页码:1224-1228
摘要	(Y0.96Er0.02Yb0.02)O-3 nanocrystals of 10 and 40 nm average particle size were prepared by combustion method. And bulk materials of the same components were obtained by annealing at 1 200 degrees C. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectra, transmission electron microscope (TEM), and scanning electron microscopy (SEM) were used to characterize the crystal structure and morphology of the samples. The upconversion emission spectra and NIR (near-infrared) emission spectra were measured, under 980 nm excitation. The research result indicates that as the particle size decreases, the upconversion red emission and NIR emission components increase in the emission spectra. This phenomenon is attributed to the large ratio of surface area to volume in nanoerystals. This characteristic makes the nanocrystals absorb more OH, whose vibrational energy is 3 200-3 800 cm(-1). The increase in the OH- number enhances the rate of nonradiative relaxation from Er3+ I-4(11/2) to I-4(13/2) energy level (energy gap is 3 600 cm(-1)). This nonradiative relaxation process depopulates the I-4(11/2) level and makes the green emission weaker. Meanwhile, this process populates the I-4(13/2) level and makes the red and NIR emissions stronger. The intensity of 1.5 mu m main peak is 1.6 times that of bulk materials. This result has great significance in actual applications of nanphosphors.
收录类别	SCI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/25635
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Meng Q. Y.,Chen B. J.,Lu S. C.,et al. The Enhancement of 1.5 mu m Near Infrared Luminescence in Er3+ and Yb3+ Codoped Y2O3 Nanocrystalline[J]. Spectroscopy and Spectral Analysis,2010,30(5):1224-1228.
APA	Meng Q. Y.,Chen B. J.,Lu S. C.,Sun J. T.,&Qu X. R..(2010).The Enhancement of 1.5 mu m Near Infrared Luminescence in Er3+ and Yb3+ Codoped Y2O3 Nanocrystalline.Spectroscopy and Spectral Analysis,30(5),1224-1228.
MLA	Meng Q. Y.,et al."The Enhancement of 1.5 mu m Near Infrared Luminescence in Er3+ and Yb3+ Codoped Y2O3 Nanocrystalline".Spectroscopy and Spectral Analysis 30.5(2010):1224-1228.

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