Phosphor powder, wavelength conversion body, and light emitting device
AssigneeDenka Company Limited
InventorsHiroki Banno, Hiroaki Toyoshima
Life of this patent
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Abstract
A phosphor powder containing a phosphor represented by General Formula (I) below. In General Formula (I), M1 includes at least La and optionally further includes one or more elements selected from the group made of lanthanoid elements other than Y and La, M2 includes at least Ba and optionally further includes one or more elements selected from the group made of Mg, Ca, and Sr, x is equal to or more than 0.005 and equal to or less than 0.2, y is equal to or more than 0 and equal to or less than 0.1, and z is more than 0.44 and equal to or less than 0.99: (Eu(1-x)(1-z)M1xM2(1-x)z)2(Si1-yAly)5N8 . . . (I).
Claims6
A phosphor powder comprising:
- a phosphor represented by General Formula (I) below,
- (Eu(1-x)(1-z)M1xM2(1-x)z)2(Si1-yAly)5N8 (I)
- in General Formula (I),
- M1 includes at least La and optionally further includes one or more elements selected from the group consisting of lanthanoid elements other than Y and La,
- M2 includes at least Ba and optionally further includes one or more elements selected from the group consisting of Mg, Ca, and Sr,
- x is equal to or more than 0.005 and equal to or less than 0.2,
- y is equal to or more than 0 and equal to or less than 0.1, and
- z is more than 0.44 and equal to or less than 0.99,
- wherein, in a crystal structure of the phosphor, a unit lattice volume is equal to or more than 0.368 nm3 and less than 0.378 nm3.
A phosphor powder comprising:
- a phosphor represented by General Formula (I) below,
- (Eu(1-x)(1-z)M1xM2(1-x)z)2(Si1-yAly)5N8 (I)
- in General Formula (I),
- M1 includes at least La and optionally further includes one or more elements selected from the group consisting of lanthanoid elements other than Y and La,
- M2 includes at least Ba and optionally further includes one or more elements selected from the group consisting of Mg, Ca, and Sr,
- x is equal to or more than 0.005 and equal to or less than 0.2,
- y is equal to or more than 0 and equal to or less than 0.1, and
- z is more than 0.44 and equal to or less than 0.99,
- wherein a peak wavelength of an emission spectrum when the phosphor powder is irradiated with light having a wavelength of 450 nm is equal to or more than 800 nm.
Dependencies are inferred from the claim text.