Yellow light-emitting halophosphate phosphors and light sources incorporating the same

A light source comprising:

• at least one LED that is capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue;
• and
• at least one luminescent material selected from the group of luminescent materials having a general formula of (Ca1-x-y-p-qSrxBayMgzEupMnq)a(PO4)3(F,Cl,OH),
• wherein 0≦x≦1, 0≦y≦1, 0≦z≦1, 0<p≦0.3, 0<q≦0.3, 0<x+y+z+p+q≦1, and 4.5≦a≦5;
• said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum.

A light source comprising:

• at least one LED that is capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue;
• and
• a luminescent material having a formula of (Ca1-p-qEupMnq)a(PO4)3F,
• wherein 0<p≦0.3, 0<q≦0.3, and 4.5≦a≦5;
• said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum.

A light source comprising:

• at least one LED that is capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue;
• and
• a luminescent material having a formula of (Ca1-p-qEupMnq)a(PO4)3Cl,
• wherein 0<p≦0.3, 0<q≦0.3, and 4.5≦a≦5;
• said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum.

A light source comprising:

• a plurality of LEDs, each being capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue;
• and
• at least one luminescent material selected from the group of luminescent materials having a general formula of (Ca1-x-y-p-qSrxBayMgzEupMnq)a(PO4)3(F,Cl,OH),
• wherein 0≦x≦1, 0≦y≦1, 0≦z≦1, 0<p≦0.3, 0<q≦0.3, 0<x+y+z+p+q≦1, and 4.5≦a≦5;
• said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum.

A light source comprising:

• a plurality of LEDs, each being capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue;
• and
• a luminescent material having a formula of (Ca1-p-qEupMnq)a(PO4)3F,
• wherein 0<p≦0.3, 0<q≦0.3, and 4.5≦a≦5;
• said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum.

A light source comprising:

• a plurality of LEDs, each being capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue;
• and
• a luminescent material having a formula of (Ca1-p-qEupMnq)5(PO4)3Cl,
• wherein 0<p≦0.3, 0<q≦0.3, and 4.5≦a≦5;
• said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum.