Nitride phosphor and production process thereof, and light emitting device
First Claim
1. A process for production of a nitride phosphor which has a general formula LXMYN((2/3)x+(4/3)Y):
- R (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd and Hg, M is at least one or more elements selected from the Group IV Elements consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and R is an activator, 0.5≦
X≦
3, 1.5≦
Y≦
8) and absorbs at least a portion of light having a first luminescence spectrum and emits light having a second luminescence spectrum which is different from the above-mentioned first luminescence spectrum, the process having a step of firing in ammonia atmosphere.
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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.
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8 Claims
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1. A process for production of a nitride phosphor which has a general formula LXMYN((2/3)x+(4/3)Y):
- R (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd and Hg, M is at least one or more elements selected from the Group IV Elements consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and R is an activator, 0.5≦
X≦
3, 1.5≦
Y≦
8) and absorbs at least a portion of light having a first luminescence spectrum and emits light having a second luminescence spectrum which is different from the above-mentioned first luminescence spectrum, the process having a step of firing in ammonia atmosphere. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- R (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd and Hg, M is at least one or more elements selected from the Group IV Elements consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and R is an activator, 0.5≦
Specification