Phosphors, fabricating method thereof, and light emitting device employing the same
AssigneeChung Yuan Christian University
InventorsWei-Jen Liu, Pin-Chun Lin
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Abstract
A phosphor material is provided which having the chemical formula is (Ln1-x-y-zCex)3Al5O12-y-zCyNz, wherein Ln is one or more metals selected from Y, La, Pr, Nd, Eu, Gd, Tb, Dy, Yb, Er, Sc, Mn, Zn, Cu, Ni and Lu, and 0.01≦x≦0.3, 0≦y≦0.3, and 0.001≦z≦0.3. Before the sintering process with high temperature is performed, the different kinds of nitrogen source or the combination of nitrogen source and carbon source thereof is added into the synthesized phosphor to provide carbon atom (C) and nitrogen atom (N) that is doped into the phosphor material, in which the nitrogen source includes an organic and an inorganic nitrogen compound. The nitrogen source is added in addition to substitute oxygen atom and to perform doping process.
Claims11
A phosphor material, characterized in that, comprising the chemical formula as (Ln1-x-y-zCex)3Al5O12-y-zCyNz, wherein said Ln is one or more metals selected from Y, La, Pr, Nd, Eu, Gd, Tb, Dy, Yb, Er, Sc, Mn, Zn, Cu, Ni and Lu, and 0.01≦x≦0.3, 0≦y≦0.3 and 0.001≦z≦0.3.
A method for forming a phosphor material, characterized in that:
- doping an organic nitrogen sources or an inorganic nitrogen source into a phosphors precursor, a synthesized phosphor or a commercially available phosphor in a reduction environment under a sintering process with a high temperature, wherein said phosphor material is formed by said phosphor precursor having a chemical formula as (Ln1-x-y-zCex)3Al5O12-y-zCyNz, wherein said Ln is one or more metals selected from Y, La, Pr, Nd, Eu, Gd, Th, Dy, Yb, Er, Sc, Mn, Zn, Cu, Ni and Lu, and 0.01≦x≦0.3, 0≦y≦0.3 and 0.001≦z≦0.3.
A luminous device comprising a fluorescence excitation light source and a phosphor material, said phosphor material absorbed said fluorescence excitation light source to emit a visible light, and said phosphor material is characterized in that, comprising the chemical formula as (Ln1-x-y-zCex)3Al5O12-y-zCyNz, wherein said Ln is a one or more metals selected from Y, La, Pr, Nd, Eu, Gd, Tb, Dy, Yb, Er, Sc, Mn, Zn, Cu, Ni and Lu, and 0.01≦x≦0.3, 0≦y≦0.3 and 0.001≦z≦0.3.
Dependencies are inferred from the claim text.