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US 11,760,927 B2Granted
Green phosphor, phosphor sheet, and light-emitting device
AssigneeDexerials Corporation
InventorsTakehiro Yamasuge, Tsuneo Kusunoki, Moriaki Abe, Masahide Daimon
Life of this patent
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Abstract
A green phosphor including: (i) an inorganic phosphor particle; and (ii) neodymium-containing particles attached on a surface of the inorganic phosphor particle, wherein the green phosphor has a light-emission local maximum wavelength in a range of from 500 nm to 570 nm.
Claims6
A green phosphor comprising:
- an inorganic phosphor particle;
- and
- neodymium-containing particles attached on a surface of the inorganic phosphor particle,
- wherein the green phosphor has a light-emission local maximum wavelength in a range of from 500 nm to 570 nm, and the half value width of the light-emission local maximum wavelength is less than 51 nm,
- wherein the inorganic phosphor particle contains a base particle and a silicon oxide coating on a surface of the base particle,
- wherein a molar ratio (O/Si) of an oxygen atom to a silicon atom in the silicon oxide coating through ICP emission spectroscopy of the green phosphor is 2.30 or more but is 2.60 or less, and
- wherein the inorganic phosphor particle includes a base particle represented by any one of General Formula (2) to General Formula (3) below:
- (Sr1−yCay)1−xGa2S4:Eux General Formula (2);
- and
- (BazSr1−z)1−xGa2S4:Eux General Formula (3),
- where in the General Formulas (2) to (3), x satisfies 0<x<1, y satisfies 0<y<1, and z satisfies 0<z<1, and
- wherein the neodymium-containing particles contain at least one selected from the group consisting of neodymium hydroxide, neodymium oxide carbonate, and neodymium oxide.
9 more elements
Dependencies are inferred from the claim text.