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US 12,428,602 B2Granted
Phosphor, light emitting device, light source for sensing system, and illumination system for sensing system
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMitsuru Nitta, Ryosuke Shigitani, Shozo Oshio
Life of this patent
Estimating the term…
Abstract
Provided is a phosphor represented by general formula (1) below, (Gd1-x-y,Lny,MIIx)3MIII2(Ga1-z,MIVz)3O12:Cr3+ (1) where, in the formula, Ln is one or more elements selected from La, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Yb, and Lu, MII is a divalent element, MIII is a trivalent element, MIV is a tetravalent element, and x, y, and z satisfy 0<x<0.5, 0≤y<0.5, and 0<z<0.5.
Claims10
A phosphor represented by general formula (1) below,
- (Gd1-x-y,Lny,MIIx)3MIII2(Ga1-z,MIVz)3O12:Cr3+ (1)
- where, in the formula, Ln is one or more elements selected from La, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Yb, and Lu, MII is a divalent element, MIII is a trivalent element, MIV is a tetravalent element, and x, y, and z satisfy 0<x<0.5, 0≤y<0.5, and 0<z<0.5, wherein the phosphor has a fluorescence peak within a wavelength range of 750 nm or more and less than 900 nm, and a full width at half maximum of the fluorescence peak is 110 nm or more and less than 250 nm.
A phosphor represented by general formula (1) below,
- (Gd1-x-y,Lny,MII)=3MIII2(Ga1-z,MIV2)3O12:Cr3+ (1)
- where, in the formula, Ln is one or more elements selected from La, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Yb, and Lu, MII is a divalent element, MIII is a trivalent element, MIV is a tetravalent element, and x, y, and z satisfy 0<x<0.5, 0≤y<0.5, and 0<z<0.5,
- wherein a 1/e afterglow value is 1 μs or more and less than 100 μs.
Dependencies are inferred from the claim text.