Enhanced photoluminescence property of Dy3+ co-doped BaAl2O4:Eu2+ green phosphors
| Autor: | Dong Kyun Yim, Hee Suk Roh, In Sun Cho, Jae Sul An, Chin Moo Cho, Kug Sun Hong, Dong Wan Kim, Tae Hoon Noh |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Photoluminescence Scanning electron microscope Process Chemistry and Technology Analytical chemistry Phosphor Fluorescence spectroscopy Surfaces Coatings and Films Electronic Optical and Magnetic Materials X-ray photoelectron spectroscopy Phase (matter) Materials Chemistry Ceramics and Composites Powder diffraction Co doped |
| Zdroj: | Ceramics International. 38:443-447 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2011.07.025 |
| Popis: | Eu2+-doped BaAl2O4 green phosphors were prepared by a conventional solid-state reaction and the effects of Dy3+ co-doping on the photoluminescence property were investigated. The phosphors were characterized by X-ray powder diffraction (XRD), fluorescence spectroscopy, field-emission scanning electron microscopy (FESEM) and X-ray photoelectron spectroscopy (XPS). XRD showed that all prepared samples exhibited a hexagonal BaAl2O4 phase. Fluorescence spectroscopy showed that the photoluminescence efficiency increased with increasing Eu2+ concentration until 3 mol% then decreased at higher concentrations due to concentration quenching effect. Moreover, Dy3+ co-doping increased the photoluminescence efficiency of the Eu2+-doped BaAl2O4 phosphor. |
| Databáze: | OpenAIRE |
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