RARE EARTH PHOSPHORUS VANADATE PHOSPHOR AND VACUUM ULTRAVIOLET-EXCITABLE LIGHT-EMITTING DEVICE USING

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PROBLEM TO BE SOLVED : To provide a rare earth phosphorus vanadate phosphor having good emission luminance, maintenance factor of paste baking luminance and dispersibility, and to provide a vacuum ultraviolet-excitable light-emitting device using the phosphor. SOLUTION : The rare earth phosphorus vanadate phosphor comprises at least one or more kinds of elements selected from among the group consisting of Y, La, Gd, and Lu, and at least one or more kinds of elements selected from among the group consisting of Eu, P, and V, and O as a basic constituent element. The rare earth phosphorus vanadate phosphor is obtained by coating the surfaces of phosphor particles with a surface treating substance containing at least one or more kinds of silicates and has high emission luminance and the good maintenance factor of the paste baking luminance and dispersibility. Thereby, a light-emitting device having excellent emission characteristics and coating characteristics can be provided by using the phosphor in the light-emitting device (vacuum ultraviolet-excitable light-emitting device) such as a plasma display, a high-load fluorescent lamp, and a rare gas discharge lamp. COPYRIGHT : (C)2009, JPO&INPIT