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PHOTONIC STRUCTURES FOR EFFICIENT LIGHT EXTRACTION AND CONVERSION IN MULTI-COLOR LIGHT EMITTING DEVICES

  • US 20100327305A1
  • Filed: 07/28/2010
  • Published: 12/30/2010
  • Est. Priority Date: 10/14/2005
  • Status: Active Grant
First Claim
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1. A high efficiency light emitting diode (LED) comprising:

  • (a) a first active region including one or more primary emitting species (PES) for emitting light at a first wavelength, wherein the PES emit the light at the first wavelength when electrically-injected;

    (b) a second active region including one or more secondary emitting species (SES) for emitting light at a second wavelength, wherein the SES emit the light at the second wavelength when optically-pumped by the light emitted by the PES at the first wavelength; and

    (c) one or more photonic crystals, formed proximate to the first and second regions, wherein the photonic crystals are chosen to extract total internal reflection (TIR) or waveguided (WG) modes of the light emitted by the PES or the SES.

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