| 光谱学与光谱分析 |
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| Preparation and Luminescence Properties of Nanocrystals Gd2O3∶Eu3+ |
| PENG Zhi-wei,WANG Ling-ling*,LIU Huang-qing, LI Hong-jian, ZOU Bing-suo, YANG Guang, ZHANG Jie |
| College of Physics and Microelectronics Science，Hunan University, Changsha 410082, China |
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Abstract Nanocrystalline Gd2O3 doped with europium was synthesized by the low-temperature combustion method. By using the X-ray diffraction (XRD), high resolution transmission electron microscopy(HRTEM), and fluorescence spectrophotometer, the structural, morphological and luminescence properties of the nanocrystal were investigated. The results show that by varying the glycine-to-metal nitrate (G/M) molar ratio and the annealing temperature, nanocrystalline Gd2O3∶Eu3+ with different structure and grain size could be achieved. The structure changed from cubic to monoclinic with the increment of G/M ratio after the samples had been calcined at 800 ℃ for 0.5 hour. When the G/M ratio was 0.83 and 1.0, the nanosized and pure cubic phase Gd2O3∶Eu3+ was produced. The crystalline size became bigger with increasing the annealing temperature. The grain size was about 10-30 nm. The main emission peak in cubic Gd2O3∶Eu3+ nanocrystal was at 612 nm(the 5D0→7F2 transition). In addition, a red shift for charge transfer state occurred in the excitation spectrum.
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Received: 2005-12-28
Accepted: 2006-03-28
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Corresponding Authors:
WANG Ling-ling
E-mail: llwang@hnu.cu
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| Cite this article: |
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PENG Zhi-wei,WANG Ling-ling,LIU Huang-qing, et al. Preparation and Luminescence Properties of Nanocrystals Gd2O3∶Eu3+ [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(03): 427-431.
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https://www.gpxygpfx.com/EN/Y2007/V27/I03/427 |
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