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Phosphor, phosphor manufacturing method, and white light emitting device

  • US 9,909,058 B2
  • Filed: 09/02/2010
  • Issued: 03/06/2018
  • Est. Priority Date: 09/02/2009
  • Status: Active Grant
First Claim
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1. A luminescent material for use with a light emitting device, comprising a composition of one of Sr3AlSi2O9/2N8/3:

  • Eu, Sr2AlSi3O7/2N4;

    Eu2, Sr2Al3Si2O13/2N8/3;

    Eu2, or Sr2Al3SiO13/2N4/3;

    Eu2, wherein at least one peak intensity of light in a wavelength of between about 480 nm to about 680 nm is provided by the luminescent material when excited by light from the light emitting device, andwherein the composition has a crystal structure in which a portion of a Si—

    N bonding of a silicon nitride is substituted for an Al—

    N bonding or an Al—

    O bonding, andfurther wherein the luminescent material of said composition has peak wavelengths in different wavelength bands, and the crystal structure for the luminescent material of said composition having one of the peak wavelengths in the different wavelength bands is different from the crystal structure of the luminescent material of said composition having another one of the peak wavelengths in the different wavelength bands.

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