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US 2019/0194540 A1Published application
Oxynitride fluorescent material, light emitting device, and method for producing oxynitride fluorescent material
AssigneeNichia Corporation
InventorsShigeki YOSHIDA, Shoji HOSOKAWA
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Abstract
Provided are an oxynitride fluorescent material, a light emitting device, and a method for producing an oxynitride fluorescent material. The oxynitride fluorescent material containing a composition represented by the following formula (I); (Ba1−aEua)1−bMbSi2O2+cN2+d (I), wherein in the formula (I), M represents at least one element selected from the group consisting of rare earth elements excluding Eu and Sm; and a, b, c, and d each satisfy 0<a≤1.0, 0<b≤0.07, −0.3<c<0.3, and −0.3<d<0.3.
Claims10
An oxynitride fluorescent material comprising a composition represented by the following formula (I):
- (Ba1−aEua)1−bMbSi2O2+cN2+d (I)
- wherein in the formula (I), M represents at least one element selected from the group consisting of rare earth elements excluding Eu and Sm;
- and a, b, c, and d each satisfy 0<a≤1.0, 0<b≤0.07, −0.3<c<0.3, and −0.3<d<0.3.
Dependencies are inferred from the claim text.