| Autor: |
Kwon-Do Ma, Shin-Ho Cho, Choon-Soo Kim, Se-Hyeok Ahn, Jae-Young Jang, Jun-Hyuk Bang |
| Rok vydání: |
2012 |
| Předmět: |
|
| Zdroj: |
Journal of the Korean Institute of Electrical and Electronic Material Engineers. 25:298-303 |
| ISSN: |
1226-7945 |
| DOI: |
10.4313/jkem.2012.25.4.298 |
| Popis: |
Y1-xVO4:Eux 3+ red phosphors were synthesized with changing the mol ratios of Eu 3+ ions by using the solid-state reaction method. The crystalline structure of phosphors was found to be a tetragonal system with the maximum diffraction intensity at 25.02°. The grain particles showed the truncated hexagonal patterns with a very homogeneous size distribution at 0.05 mol of Eu 3+ ion. The excitation spectra of the phosphor ceramics were composed of a broad band centered at 303 nm and weak narrow multilines peaked in the range of 360-420 nm. The dominant emission spectrum was the strong red emission centered at 619 nm due to the 5 D0→ 7 F2 electric dipole transition. The experimental results suggest that the optimum doping mol ratio of Eu 3+ ions for preparing the red phosphors is 0.10 mol with the asymmetry ratio of 5.21. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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