Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle
AssigneesMitsubishi Chemical Corporation, National Institute for Materials Science
InventorsKyota Ueda, Tomoyuki Kurushima, Atsushi Ooishi, Naoto Hirosaki
Life of this patent
Estimating the term…
Abstract
A phosphor includes a crystal phase having a composition represented by RexMAaMBbMCcDdXe, in which MA includes at least one of Ca, Sr, Ba, Na, K, Y, Gd, or La, MB includes at least one of Li, Mg, or Zn, MC includes at least one of Al, Si, Ga, In, or Sc, D is N (nitrogen) and/or O (oxygen), X includes at least one of F, Cl, Br, or I, Re includes at least one of Eu, Ce, Pr, Tb, or Dy, and a, b, c, d, e, and x satisfy the specific expressions, respectively. In the phosphor, when a content of B (boron) is designated as b (mass ppm), a value of Log10(b) is 3.5 or less.
Claims20
A phosphor, comprising:
- a crystal phase having a composition represented by formula [1] below, wherein when a content of B (boron) is designated as b′ (mass ppm), a value of Log10(b′) is 3.5 or less,
- RexMAaMBbMCcDdXe [1]
- (in formula [1] above,
- MA includes Sr,
- MB includes Li,
- MC includes one or more elements selected from the group consisting of Al and Ga,
- D is one or more elements selected from the group consisting of N (nitrogen) and O (oxygen), and includes N (nitrogen),
- X includes one or more elements selected from the group consisting of F, Cl, Br, and I,
- Re includes Eu, and
- a, b, c, d, e, and x satisfy the following expressions, respectively,
- 0.7≤a≤1.3
- 0.9≤b≤1.3
- c=3.0
- 3.2≤d≤4.8
- 0.0≤e≤0.2
- 0.0<x≤0.2).
A phosphor, comprising:
- a crystal phase having a composition represented by formula [2] below, wherein when a content of B (boron) is designated as b′ (mass ppm), a value of Log10(b′) is 3.5 or less,
- RexMAaMBb(Al1−yMC′y)cDdXe [2]
- (in formula [2] above,
- MA includes Sr,
- MB includes Li,
- MC′ includes Ga,
- D is one or more elements selected from the group consisting of N (nitrogen) and O (oxygen), and includes N (nitrogen),
- X includes one or more elements selected from the group consisting of F, Cl, Br, and I,
- Re includes Eu, and
- a, b, c, d, e, x, and y satisfy the following expressions, respectively,
- 0.7≤a≤1.3
- 0.9≤b≤1.3
- c=3.0
- 3.2≤d≤4.8
- 0.0≤e≤0.2
- 0.0<x≤0.2
- 0.0<y≤1.0).
Dependencies are inferred from the claim text.