Nitride phosphor and production process thereof, and light emitting device
First Claim
1. A nitride phosphor which absorbs at least a portion of light having the first luminescence spectrum and emits light having the second luminescence spectrum which is different from said first luminescence spectrum, the nitride phosphor being an L-M-N:
- Eu, WR-base phosphor (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba and Zn. M is at least one or more elements selected from the Group IV Elements consisting of C, Si, Ge, Sn, Ti, Zr and Hf. N is nitrogen. Eu is europium. WR is a rare earth element other than Eu.).
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Abstract
To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y·(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
52 Citations
40 Claims
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1. A nitride phosphor which absorbs at least a portion of light having the first luminescence spectrum and emits light having the second luminescence spectrum which is different from said first luminescence spectrum, the nitride phosphor being an L-M-N:
- Eu, WR-base phosphor (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba and Zn. M is at least one or more elements selected from the Group IV Elements consisting of C, Si, Ge, Sn, Ti, Zr and Hf. N is nitrogen. Eu is europium. WR is a rare earth element other than Eu.).
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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10. A nitride phosphor which absorbs at least a portion of light having a first luminescence spectrum and emits light having a second luminescence spectrum which is different from said first luminescence spectrum, the nitride phosphor being an L-M-O—
- N;
Eu, WR (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba and Zn. M is at least one or more elements selected from the Group IV Elements consisting of C, Si, Ge, Sn, Ti, Zr and Hf. O is oxygen. N is nitrogen. Eu is europium. WR is a rare earth element other than Eu.). - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
- N;
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39. A light emitting device comprising;
- a light emitting element which emits light having a first luminescence spectrum and a phosphor which absorbs at least a portion of light of said first luminescence spectrum and emits light having a second luminescence spectrum which is different from said first luminescence spectrum, wherein the phosphor is a nitride phosphor which absorbs at least a portion of light having the first luminescence spectrum and emits light having the second luminescence spectrum which is different from said first luminescence spectrum, the nitride phosphor being an L-M-N;
Eu, WR-base phosphor (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba and Zn. M is at least one or more elements selected from the Group IV Elements consisting of C, Si, Ge, Sn, Ti, Zr and Hf. N is nitrogen. Eu is europium. WR is a rare earth element other than Eu.). - View Dependent Claims (40)
- a light emitting element which emits light having a first luminescence spectrum and a phosphor which absorbs at least a portion of light of said first luminescence spectrum and emits light having a second luminescence spectrum which is different from said first luminescence spectrum, wherein the phosphor is a nitride phosphor which absorbs at least a portion of light having the first luminescence spectrum and emits light having the second luminescence spectrum which is different from said first luminescence spectrum, the nitride phosphor being an L-M-N;
Specification