Intematix Corporation

Ka Y Leung

Yi-Qun Li

Dejie Tao

Shengfeng Liu

Red-emitting phosphors may comprise a nitride-based composition represented by the chemical formula MSrSiAlNEu, wherein: M is at least one of Mg, Ca, Sr, Ba, Y, Li, Na, K and Zn, and 0&#x3c;a&#x3c;1.0; 1.5&#x3c;b&#x3c;2.5; 4.0&#x2264;c&#x2264;5.0; 0&#x2264;d&#x2264;1.0; 7.5&#x3c;e&#x3c;8.5; and 0&#x3c;f&#x3c;0.1; wherein a+b+f&#x3e;2+d/v and v is the valence of M. Furthermore, nitride-based red-emitting phosphor compositions may be represented by the chemical formula MM'SiAlN:A, wherein: M is Mg, Ca, Sr, Ba, Y, Li, Na, K and Zn, and x&#x3e;0; M&#x2032; is at least one of Mg, Ca, Sr, Ba, and Zn; 0&#x2264;y&#x2264;0.15; and A is at least one of Eu, Ce, Tb, Pr, and Mn; wherein x&#x3e;y/v and v is the valence of M, and wherein the red-emitting phosphors have the general crystalline structure of M&#x2032;SiN:A.

Red-emitting nitride-based calcium-stabilized phosphors

Red-emitting phosphors may comprise a nitride-based composition represented by the chemical formula MSrSiAlNEu, wherein: M is at least one of Mg, Ca, Sr, Ba, Y, Li, Na, K and Zn, and 0&#x3c;a&#x3c;1.0; 1.5&#x3c;b&#x3c;2.5; 4.0&#x2266;c&#x2266;5.0; 0&#x2266;d&#x2266;1.0; 7.5&#x3c;e&#x3c;8.5; and 0&#x3c;f&#x3c;0.1; wherein a+b+f&#x3e;2+d/v and v is the valence of M. Furthermore, nitride-based red-emitting phosphor compositions may be represented by the chemical formula MM'SiAlN:A, wherein: M is Mg, Ca, Sr, Ba, Y, Li, Na, K and Zn, and x&#x3e;0; M&#x2032; is at least one of Mg, Ca, Sr, Ba, and Zn; 0&#x2266;y&#x2266;0.15; and A is at least one of Eu, Ce, Tb, Pr, and Mn; wherein x&#x3e;y/v and v is the valence of M, and wherein the red-emitting phosphors have the general crystalline structure of M&#x2032;SiN:A.

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Ka Y Leung