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Enhanced photoluminescence property of Dy co-doped BaAl2O4:Eu green phosphors |
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| Authors: | Hee-Suk RohIn-Sun Cho Jae-Sul AnChin Moo Cho Tae Hoon NohDong Kyun Yim Dong-Wan Kim Kug Sun Hong |
| Affiliation: | a Department of Materials Science & Engineering, Seoul National University, Shillim-dong, San 56-1, Gwanak-gu, Seoul 151-744, Republic of Korea b Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA c LCD Division, Samsung Electronics Co., Maetan 3-dong, Yeongtong-gu, Suwon 443-742, Republic of Korea d Department of Materials Science & Engineering, Ajou University, Woncheon-dong, San 5, Yeongtong-gu, Suwon 443-749, Republic of Korea |
| Abstract: | 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. |
| Keywords: | BaAl2O4:Eu2+ Phosphor Optimum concentration Dy3+ co-doping effects Photoluminescence |
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