Changchun Institute of Optics,Fine Mechanics and Physics,CAS
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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