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US 11,555,148 B2Granted
Ultraviolet-emitting phosphor, light-emitting element, and light-emitting device
AssigneeDyden Corporation
InventorsTanamachi Nobutsugu, Tanno Hiroaki, Fukushima Tomoko, Nishihara Terutaka
Life of this patent
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Abstract
An ultraviolet light emitting phosphor for mercury-free lamps is a phosphor composed of a phosphate containing at least two metal elements selected from the group consisting of group 13 elements and lanthanoid series elements, and is excited to emit ultraviolet by irradiation with vacuum ultraviolet rays or an electron beam.
Claims20
An ultraviolet light emitting phosphor selected from the group consisting of:
- (i) ((Lu)1-x-y(Al,Ga)y)PO4:Scx, wherein 0.005≤x≤0.80 and 0.05≤y≤0.6;
- (ii) La1-x-yPO4:CexPry, wherein 0.005≤x≤0.50 and 0.05≤y≤0.50;
- and
- (iii) ((Lu)1-x-y(Al,Ga)y)PO4:Ndx, wherein 0.001≤x≤0.10 and 0.010≤y≤0.100.
1 more element
An ultraviolet light emitting phosphor of the formula:
- (Al,Ga)1-xPO4:Scx, wherein 0.005≤x≤0.80.
Dependencies are inferred from the claim text.