| abstract |
A green-emitting oxynitride phosphor may have the formula Eu 2+ :M 2+ Si 4 AlO x N 7_2x/3 , wherein: x ranges from greater than or equal to 0.1 to less than or equal to 1.0; and M 2+ represents one or more different divalent metals selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; wherein the green-emitting oxynitride phosphor is configured to emit light having a peak emission wavelength ranging from about 500 nm to about 550 nm under excitation of blue light ranging from about 420 nm to about 470 nm.. Furthermore, the phosphor may have the formula Eu 2+ :M 2+ Si 4.5 Al 1+y O 0.5 N y+22/3 , wherein y ranges from greater than or equal to 0.20 to less than or equal to 2.0. Yet furthermore, the green-emitting oxynitride phosphors may be included in white light illumination systems. |