PHOSPHOR CONTAINING Ce
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMITSURU NITTA, YASUHISA INADA, NOBUAKI NAGAO
Life of this patent
Estimating the term…
Abstract
A phosphor contains a crystal phase having a chemical composition CexM3-x-yβ6γ11-z. M is one or more elements selected from the group consisting of Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. β contains Si in an amount of 50 mol % or more of a total mol of β. γcontains N in an amount of 80 mol % or more N of a total mol of γ. x satisfies 0<x≦0.6. y satisfies 0≦y≦1.0. z satisfies 0≦z≦1.0. The phosphor shows a maximum peak of an emission spectrum in a wavelength range of 600 nm or more and 800 nm or less and a first peak of an excitation spectrum in a wavelength range of 500 nm or more and 600 nm or less.
Claims22
A phosphor comprising a crystal phase having a chemical composition CexM3-x-yβ6γ11-z, where
- M is one or more elements selected from the group consisting of Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;
- β contains Si in an amount of 50 mol % or more of a total mol of β;
- γ contains N in an amount of 80 mol % or more of a total mol of γ;
- 0<x≦0.6;
- 0≦y≦1.0;
- and
- 0≦z≦1.0, wherein
- the phosphor shows:
- a maximum peak of an emission spectrum in a wavelength range of 600 nm or more and 800 nm or less;
- and
- a first peak of an excitation spectrum in a wavelength range of 500 nm or more and 600 nm or less.
A phosphor comprising a crystal phase having a chemical composition CexM3-x-yβ6γ11-z, where
- M is one or more elements selected from the group consisting of Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;
- β contains Si in an amount of 50 mol % or more of a total mol of β;
- γ contains N in an amount of 80 mol % or more of a total mol of γ;
- 0<x≦0.6;
- 0≦y≦1.0;
- and
- 0≦z≦1.0, wherein
- in an EXAFS radial distribution function spectrum at K-absorption edge of Ce, a first neighbor shell of Ce has a peak having a height lower than that of a peak of a second neighbor shell of Ce.
A phosphor comprising:
- a crystal phase having a chemical composition CexM3-x-yβ6γ11-z, where
- M is one or more elements selected from the group consisting of Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;
- β contains Si in an amount of 50 mol % or more of a total mol of β;
- γ contains N in an amount of 80 mol % or more of a total mol of γ;
- 0<x≦0.6;
- 0≦y≦1.0;
- and
- 0≦z≦1.0, wherein
- in an EXAFS radial distribution function spectrum at K-absorption edge of Ce, the coordination number of a first neighbor shell of Ce is seven.
A light-emitting apparatus comprising:
- an excitation light source emitting light of a wavelength of 600 nm or less;
- and
- a phosphor that is irradiated with the light emitted by the excitation light source and emits fluorescence having a wavelength longer than a wavelength of the light emitted by the excitation light source, wherein
- the phosphor comprises a crystal phase having a chemical composition CexM3-x-yβ6γ11-z, where
- M is one or more elements selected from the group consisting of Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;
- β contains Si in an amount of 50 mol % or more of a total mol of β;
- γ contains N in an amount of 80 mol % or more of a total mol of γ;
- 0<x≦0.6;
- 0≦y≦1.0;
- and
- 0≦z≦1.0, and
- the phosphor shows:
- a maximum peak of an emission spectrum in a wavelength range of 600 nm or more and 800 nm or less;
- and
- a first peak of an excitation spectrum in a wavelength range of 500 nm or more and 600 nm or less.
Dependencies are inferred from the claim text.