Preparation and Upeonversion Lumineseenee ofNanoerystailine Gd2O3： Er^3＋, Yb^3
Nanocrystalline Gd1.77Yb0.2Er0.03O3 samples were prepared by combustion and precipitation methods. Structures and upconversion luminescence properties of samples were studied. The results of XRD show that all samples are cubic structure, the average crystallite size could be calculated as 23 nm and...
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| Published in: | Journal of Wuhan University of Technology. Materials science edition Vol. 23; no. 4; pp. 448 - 451 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2008
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Nanocrystalline Gd1.77Yb0.2Er0.03O3 samples were prepared by combustion and precipitation methods. Structures and upconversion luminescence properties of samples were studied. The results of XRD show that all samples are cubic structure, the average crystallite size could be calculated as 23 nm and 39 nm, respectively. The lattice constants were obtained. The FT-IR spectra were measured to investigate the vibrational feature of the samples. Upconversion luminescence spectra of samples under 980 nm laser excitation were investigated. The strong red emission of samples were observed, and attributed to 4F9/2→4I152 transitions of Er^3＋ ions, the emission intensity for sample synthesized by precipitation method is stronger compared to that of combustion method. The possible upconversion luminescence mechanisms in nanocrystalline Gd1.77Yb0.2Er0.03O3 were discussed. |
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| Bibliography: | nanocrystalline 42-1680/TB O614.3 upconversion luminescence nanocrystalline; upconversion luminescence; combustion and precipitation methods combustion and precipitation methods |
| ISSN: | 1000-2413 1993-0437 |