Phosphor, lighting fixture, and image display device
AssigneeNational Institute for Materials Science
InventorsNaoto Hirosaki, Takahashi Takeda, Tatsuya Horie
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Abstract
A phosphor substituting the conventional sialon phosphor or oxide phosphor activated by rare earth and an application thereof are provided. The phosphor of the present invention comprises an inorganic crystal including at least La, Si, Al, N (nitrogen), M element (M is at least one kind of element selected from the group consisting of Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb), and O (oxygen) if necessary and the inorganic crystal is a host crystal, which is LaSi9Al19N32 crystal or a solid-solution crystal thereof, activated by the M element.
Claims10
A phosphor comprising an inorganic crystal including:
- La, Si, Al, N (nitrogen), M element (M is at least one kind of element selected from a group consisting of Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb), and O (oxygen) if necessary;
- wherein said inorganic crystal comprises LaSi9Al19N32 crystal or a solid solution crystal of LaSi9Al19N32 crystal as a host crystal, which is activated by said M element.
Dependencies are inferred from the claim text.