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Methods and devices using high efficiency alkaline earth metal thiogallate-based phosphors

  • US 20040206973A1
  • Filed: 04/13/2004
  • Published: 10/21/2004
  • Est. Priority Date: 04/21/2003
  • Status: Active Grant
First Claim
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1. A light emitting device comprising:

  • a light output;

    a light source producing light including wavelengths of 530 nm or less; and

    a wavelength transformer located between the light source and the light output, comprising Sr1-xCaxGa2S4;

    yEu2+·

    zGa2S3, where x is 0.0001 to 1, y is a value defining sufficient Eu2+ to provide luminescent emission, and z is 0.0001 to 0.2 based on the mole amount of SrxCa1-xGa2S4, the wavelength transformer effective to increase the light at the light output having wavelength between 535 nm and 560 nm.

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