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Organic light emitting device having multiple separate emissive layers

  • US 8,143,613 B2
  • Filed: 11/27/2007
  • Issued: 03/27/2012
  • Est. Priority Date: 11/27/2007
  • Status: Active Grant
First Claim
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1. A device comprising:

  • an anode;

    a cathode; and

    a stacked emissive region disposed between the anode and the cathode, the stacked emissive region comprising;

    a first organic emissive layer comprising a first dopant and a first host;

    a second organic emissive layer comprising a second dopant and a second host; and

    a third organic emissive layer comprising a third dopant and a third host;

    wherein;

    the first host, second host, and third host are different from each other; and

    the first organic emissive layer has an emission peak different from at least one of the second emissive layer and the third emissive layer.

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