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LIGHT-EMITTING ELEMENT COMPRISING A REFLECTIVE STRUCTURE WITH HIGH EFFICIENCY

  • US 20140209949A1
  • Filed: 01/23/2014
  • Published: 07/31/2014
  • Est. Priority Date: 01/25/2013
  • Status: Active Grant
First Claim
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1. A light-emitting element, comprising:

  • a substrate;

    a light-emitting semiconductor stack over the substrate and comprising an active layer; and

    a Distributed Bragg reflective unit under the substrate comprising a first Distributed Bragg reflective structure under the substrate and comprising a first number of pairs of alternately stacked first sub-layers and second sub-layers, and a second Distributed Bragg reflective structure under the first Distributed Bragg reflective structure and comprising a second number of pairs of alternately stacked third sub-layers and fourth sub-layers, wherein the first number is different from the second number.

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