FLUORESCENT POWDER AND LIGHT EMITTING APPARATUS COMPRISING SAME

摘要

The present invention relates to fluorescent powder and a light emitting apparatus comprising same. The fluorescent powder comprises an inorganic compound that contains an element M, an element A, an element D, an element E, and an element R, the element M being selected from Eu, Ce, Mn, Tb, Dy, and Tm, the element A being selected from Mg, Ca, Sr, and Ba, the element D being selected from B, Al, Ga, In, La, Gd, Sc, Lu, and Y, the element E being selected from Si, Ge, Zr, and Hf, and the element R being at least two selected from N, O, F, and Cl. The inorganic compound at least has, in a powder X-ray diffraction spectrum with a Cokα radiation, diffraction peaks within ranges of an Bragg angle (2&thetas;) from 27.3° to 28.3°, 29.7° to 30.7°, 41.9° to 42.9°, and 43.5° to 44.5°. The proposal of the fluorescent powder in the present invention provides more candidates of solutions for the application of green fluorescent powder.