Phosphor composition and white light emitting device using the same

摘要

A phosphor composition and a white light emitting device using the same are disclosed. The white light emitting device includes a blue light emitting diode and a phosphor composition disposed on the blue light emitting diode, wherein the phosphor composition includes a yellow lanthanum silicon nitride, a yellow β-SiAlON and a red CaAlSiN, and the weight proportion of the yellow lanthanum silicon nitride, the yellow β-SiAlON and the red CaAlSiN is 1: 1:0.3˜0.45.

主权项

1. A white light emitting device that emits a white light, comprising:
a blue light emitting diode (LED) having an emission wavelength in a range of 440 nm-470 nm; and a phosphor composition disposed on the blue LED, the phosphor composition comprising:
a first nitride phosphor;a second nitride phosphor; anda third nitride phosphor,wherein the first nitride phosphor comprises lanthanum silicon nitride,wherein a peak wavelength of the second nitride phosphor is between a peak wavelength of the first nitride phosphor and a peak wavelength of the third nitride phosphor, andwherein a range of chromaticity coordinates of the white light is CIE x: 0.25-0.3 and CIE y: 0.22-0.28.