Red line emitting phosphor materials for use in LED applications
AssigneeLumination LLC
InventorsEmil Vergilov Radkov, Ljudmil Slavchev Grigorov, Anant Achyut Setlur, Alok Mani Srivastava
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Abstract
Light emitting devices including a light source and a phosphor material including a complex fluoride phosphor activated with Mn4+ which may comprise at least one of (1) A2[MF6]:Mn4+, where A is selected from Li, Na, K, Rb, Cs, NH4, and combinations thereof; and where M is selected from Ge, Si, Sn, Ti, Zr, and combinations thereof; (2) E[MF6]:Mn4+, where E is selected from Mg, Ca, Sr, Ba, Zn, and combinations thereof; and where M is selected from Ge, Si, Sn, Ti, Zr, and combinations thereof; (3) Ba0.65Zr0.35F2.70:Mn4+; or (4) A3[ZrF7]:Mn4+ where A is selected from Li, Na, K, Rb, Cs, NH4, and combinations thereof.
Claims23
A lighting apparatus comprising:
- a semiconductor light source;
- and
- a phosphor material radiationally coupled to the light source, the phosphor material comprising a complex fluoride phosphor-activated with Mn4+.
A phosphor blend comprising at least one complex fluoride phosphor activated with Mn4+ and at least one additional phosphor.
A phosphor material comprising at least one of:
- (1) A2[MF6]:Mn4+, where A is selected from Li, Na, K, Rb, Cs, NH4, and combinations thereof;
- and where M is selected from Ge, Si, Sn, Ti, Zr, and combinations thereof, providing that when A is K or Cs, M is not Si, Ge or Ti;
- and when A is Rb, M is not Si;
- (2) E[MF6]:Mn4+, where E is selected from Mg, Ca, Sr, Ba, Zn, and combinations thereof;
- and where M is selected from Ge, Si, Sn, Ti, Zr, and combinations thereof;
- (3) A3[ZrF7]:Mn4+ where A is selected from Li, Na, K, Rb, Cs, NH4, and combinations thereof;
- and/or (4) Ba0.65Zr0.35F2.70:Mn4+.
Dependencies are inferred from the claim text.