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Color filters for organic light-emissive devices

  • US 6,861,799 B1
  • Filed: 06/19/1998
  • Issued: 03/01/2005
  • Est. Priority Date: 06/21/1997
  • Status: Expired due to Term
First Claim
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1. An electroluminescent device comprising:

  • an organic light-emissive layer;

    a first electrode on one side of the light-emissive layer for injecting charge carriers of a first polarity towards the light-emissive layer;

    a light filtering layer on the other side of the light-emissive layer, the light filtering layer comprising an organic material that is doped to render it at least partially electrically conductive for injection of charge carriers of a second polarity towards the light-emissive layer, and wherein the light filtering layer is tailored to;

    absorb an emission color of the light-emissive layer and emit light of a different color;

    or transmit an emission color of the light-emissive layer and absorb light of other colors; and

    a second electrode on the other side of the light filtering layer from the light-emissive layer, for injecting charge carriers of a second polarity.

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