| 摘要 |
A red phosphor is provided to improve light emitting efficiency as compared with existing red phosphors and high chemical stability sufficient to cause little reaction with LED chips particularly in white light emitting devices. A red phosphor is represented by the formula of (Ca1-xMx)AaBbSs:Eu2+, wherein M is a divalent cation selected from the group consisting of Mg, Sr, Ba and Zn; A is a tetravalent cation selected from the group consisting of Si and Ge; B is a trivalent cation selected from the group consisting of Al, Ga, Sc, Y, La and Gd; Q is at least one halogen atom; x is 0-0.2; 0<a<=0.5; 0<b<=1.0; and s is 1+2a+3b/2.
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