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Semiconductor light emitting device provided with an alkaline earth metal boric halide phosphor for luminescence conversion

  • US 7,733,002 B2
  • Filed: 08/25/2008
  • Issued: 06/08/2010
  • Est. Priority Date: 10/19/2004
  • Status: Active Grant
First Claim
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1. A light emitting device comprising a semiconductor light emitting element and a phosphor which converts a part of a luminescence spectrum emitted from the semiconductor light emitting element;

  • wherein said luminescence spectrum of said semiconductor light emitting element is located between a near ultraviolet region and a short-wavelength visible region,wherein said phosphor is made by adding a red luminescent activator to a base material of a blue luminescent phosphor,wherein said phosphor is represented by a general formula of (M1−

    x−

    y
    EuxM′

    y)2B5O9M″

    ,where M is at least one selected from the group consisting of Mg, Ca, Ba, Sr, M′

    is at least one selected from the group consisting of Mn, Fe, Cr, Sn, 0.0001≦

    x≦

    0.5, 0.0001≦

    y≦

    0.5, and M″

    is at least one halogen selected from the group consisting of F, Cl, Br, I.

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