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US 10,196,278 B2Granted
Aluminate fluorescent material and light emitting device
AssigneeNichia Corporation
InventorsKazuya Nishimata, Shoji Hosokawa, Tomokazu Yoshida
Life of this patent
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Abstract
Provided is an aluminate fluorescent material having a composition represented by the formula X1aMgbMncAldOa+b+c+1.5d, in which X1 is at least one element selected from the group consisting of Ba, Sr; and Ca, a, b, c, and d satisfy 0.5≤a≤1.0, 0.0≤b<0.4, 0.3≤c≤0.7, 8.5≤d≤13.0, and 9.0≤b+c+d≤14.0.
Claims7
An aluminate fluorescent material having a composition represented by the formula X1aMgbMncAldOa+b+c+1.5d, wherein X1 is at least one element selected from the group consisting of Ba, Sr, and Ca;
- and a, b, c, and d satisfy 0.5≤a≤1.0, 0.00≤b≤0.38, 0.30≤c≤0.60, 8.5≤d≤13.0, and 9.0≤b+c+d≤14.0;
- wherein an emission spectrum of the aluminate fluorescent material has a peak emission intensity at a wavelength in a range of 505 nm to 550 nm, and a relative emission intensity at 535 nm in the emission spectrum with respect to the peak emission intensity is in a range of 51% to 80%.
Dependencies are inferred from the claim text.