RED LIGHT-EMITTING PHOSPHOR AND LIGHT-EMITTING MODULE USING THE SAME

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PROBLEM TO BE SOLVED : To provide a red light-emitting phosphor having a luminous efficiency higher than that of the conventional and to provide a high-luminance light-emitting module using the same. SOLUTION : The red light-emitting phosphor is represented by the formula : (M1-x, Eux)P3O9 (wherein M is a rare earth metal element; and 0≤x<1), desirably has an excitation peak wavelength of 350 to 420 nm, more desirably 385 to 405 nm. It can constitute a high-luminance light-emitting module when combined with a semiconductor light-emitting element of an emission peak wavelength of 350 to 420 nm. COPYRIGHT : (C)2006, JPO&NCIPI