Phosphor, method for producing same, and light-emitting device
AssigneeNational Institute for Materials Science
InventorsRong-Jun Xie, Naoto Hirosaki
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Abstract
Disclosed are violet, blue, and green phosphors having excellent durability and high luminance. Specifically disclosed is a phosphor which contains a metal element M (M is at least one element selected from among Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Tm and Yb) for constituting a metal ion, which is solid-solubilized in an AlON crystal, an AlON solid solution crystal or an inorganic crystal having the same crystal structure as AlON. The phosphor is capable of emitting fluorescence having a peak in the wavelength range from 300 nm to 700 nm. Also disclosed is a method for producing such a phosphor. Further disclosed are an illuminating device and an image display each containing such a phosphor.
Claims21
A phosphor comprising:
- an inorganic crystal having a composition formula:
- MaAbAlcOdNe (where M is at least one selected from among Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Tm, and Yb, and A is one or two or more kinds of metal elements other than M and Al, and a+b+c+d+e=1) wherein parameters a, b, c, d, and e satisfy the following:
- satisfy the following:
- 0.00001≦a≦0.1 (i),
- 0≦b≦0.40 (ii),
- 0.10≦c≦0.48 (iii),
- 0.25≦d≦0.60 (iv), and
- 0.02≦e≦0.35 (v);
- wherein the inorganic crystal is an AlON crystal or an AlON solid solution crystal, or has a same crystal structure as the AlON,
- wherein at least metal element M constituting a metal ion is incorporated in the inorganic crystal in solid solution, and
- wherein the phosphor emits fluorescence having a peak in a wavelength range of 300 nm to 700 nm upon irradiation with an excitation source.
A phosphor comprising:
- an AlON crystal, an AlON solid solution crystal, or an inorganic crystal having a same crystal structure as the AlON, wherein at least metal element M constituting a metal ion (here, M is at least one selected from among Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Tm, and Yb) is incorporated in the inorganic crystal in solid solution.
Dependencies are inferred from the claim text.