Preparation and luminescence of Sr3MgSi2O8 : Eu2+ blue-emitting phosphors
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초록
Sr3MgSi2O8 : Eu2+ blue-emitting phosphors were prepared by a flux method and their luminescent properties were investigated. The excitation spectra were broad (250-500 nm), showing strong excitation intensities at 370-410 nm, while the intense blue emission was observed at around 460 nm assigned to the 4f6 5d1 -4f7 transition of the Eu2+ ions incorporated into the Sr(I) sites. The strongest emission was obtained from the starting mixture with the excess Sr content. The emission intensity varied with firing temperatures, an amount of a flux, and the Eu content. These luminescent properties demonstrate that Sr3MgSi2O8 : Eu2+ powders are promising blue phosphors for use in white light emitting diodes using near ultraviolet chips.
Abstract
Sr3MgSi2O8 : Eu2+ blue-emitting phosphors were prepared by a flux method and their luminescent properties were investigated. The excitation spectra were broad (250-500 nm), showing strong excitation intensities at 370-410 nm, while the intense blue emission was observed at around 460 nm assigned to the 4f6 5d1 -4f7 transition of the Eu2+ ions incorporated into the Sr(I) sites. The strongest emission was obtained from the starting mixture with the excess Sr content. The emission intensity varied with firing temperatures, an amount of a flux, and the Eu content. These luminescent properties demonstrate that Sr3MgSi2O8 : Eu2+ powders are promising blue phosphors for use in white light emitting diodes using near ultraviolet chips.
참고문헌 (14)
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