Silicate-based yellow-green phosphors

A composition comprising:

• a silicate-based yellow phosphor having the formula A2SiO4:Eu2+D, wherein A is at least one divalent metal selected from the group consisting of Sr, Ca, Ba, Mg, Zn, and Cd;
• and
• D is a negatively changed halogen ion that is present in the yellow phosphor in an amount ranging from about 0.01 to 20 mole percent;
• wherein at least some of the negativety charged halogen ions D sudstitute for oxygen anions to become incorporate into the crystal lattice of the silicate-base yellow phosphor, and
• a blue phosphor;
• wherein the yellow phosphor is configured to emit visible light with a peak intensity in a wavelength ranging from about 540 nm to 590 nm;
• and the blue phosphor is configured to emit visible light with a peak intensity in a wavelength ranging from about 480 to 510 nm.

A composition comprising:

• a silicate-based green phosphor having the formula A2SiO4:Eu2+D, wherein A is at least one of a divalent metal selected from the group consisting of Sr, Ca, Ba, Mg, Zn, and Cd;
• and D is a negatively charged halogen ion that is present in the yellow phosphor in an amount ranging from about 0.01 to 20 mole percent, wherein at least some of the negativety charged halogen ion D substituted for oxygen anions and thus are incorporated into the crystal lattice of the silicate-based green phosphor;
• a blue phosphor;
• and
• a red phosphor;
• wherein the green phosphor is configured to emit visible light with a peak intensity in a wavelength ranging from about 500 nm to 540 nm;
• the blue phosphor is configured to emit visible light with a peak intensity in a wavelength ranging from about 480 to 510 nm;
• and the red phosphor is configured to emit visible light with a peak intensity in a wavelength ranging from about 575 to 620 nm.