| Autor: |
Guoyi Dong, Lipeng Liu, Guangjie Duan, Can Wang, Zhiping Yang, Chuncai Hou, Fu Yang, Pengfei Liu |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Journal of Alloys and Compounds. 604:346-351 |
| ISSN: |
0925-8388 |
| DOI: |
10.1016/j.jallcom.2014.03.121 |
| Popis: |
A series of Dy 3+ doped Ca 0.5 Sr 0.5 MoO 4 phosphors were synthesized by solid state reaction. The structure and the photoluminescent (PL) properties of the as-prepared powders were characterized by X-ray diffraction (XRD), field emission scanning electron microscope and fluorescent spectrophotometry. The analyses on optical transition of Ca 0.5 Sr 0.5 MoO 4 : x Dy 3+ phosphors indicate that the broad band of excitation spectrum comes from the charge transmission. The broad band of excitation spectrum matches well with the excitation energy level of Dy 3+ , indicating the energy transfer from the host to Dy 3+ . The chromaticity coordinates changed from blue–green to yellow area depending on the Dy 3+ concentration. In addition, the main mechanism of the concentration quenching was the electric multiple interaction between Dy 3+ ions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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