Nitride phosphor and production process thereof, and light emitting device
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United States of America Patent
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Nov 20, 2007
Grant Date -
Feb 23, 2006
app pub date -
Oct 18, 2005
filing date -
Mar 22, 2002
priority date (Note) -
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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 L.sub.XM.sub.YN.sub.((2/3)X+(4/3)Y):R or L.sub.XM.sub.YO.sub.ZN.sub.((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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