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US 12,492,338 B2Granted
Phosphor composition and method for manufacturing same
AssigneeNichia Corporation
InventorsShigeki Yoshida, Hiroyuki Watanabe, Shoji Hosokawa
Life of this patent
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Abstract
Provided is a phosphor having superior light-emitting properties. A phosphor composition includes: a nitride phosphor that contains, in a composition thereof, an element M that is at least one selected from the group consisting of rare earth elements except cerium, silicon, nitrogen, and cerium; and an oxyfluoride. In the phosphor composition, a content of the oxyfluoride relative to the phosphor composition is 1.5% by mass or higher and 10% by mass or lower according to an X-ray diffraction reference intensity ratio method.
Claims10
A phosphor composition comprising consisting of:
- a nitride phosphor that comprises silicon, nitrogen, cerium, and an element M that is at least one selected from the group consisting of Sc, Y, La, Gd, Tb, and Lu;
- and
- an oxyfluoride,
- wherein in the phosphor composition, a content of the oxyfluoride relative to the phosphor composition is 1.5% by mass or higher and 10% by mass or lower according to an X-ray diffraction reference intensity ratio method, and
- wherein the oxyfluoride has a composition represented by Formula (2) below,
- MOtFu (2), wherein
- M comprises at least one selected from the group consisting of Sc, Y, La, Gd, Tb, and Lu,
- t satisfies 0<t≤2.0, and
- u satisfies 0<u≤3.5.
6 more elements
Dependencies are inferred from the claim text.