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OLEDs doped with phosphorescent compounds

  • US 6,872,477 B2
  • Filed: 04/30/2003
  • Issued: 03/29/2005
  • Est. Priority Date: 12/01/1997
  • Status: Expired due to Term
First Claim
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1. An organic light emitting device comprising:

  • an anode;

    a hole transporting layer;

    an electron transporting layer; and

    a cathode;

    wherein the hole transporting layer or the electron transporting layer is an emissive layer, the emissive layer comprises a phosphorescent material and a charge-carrying host material, wherein the phosphorescent material emits phosphorescent radiation from a triplet molecular excited state at room temperature when a voltage is applied across the organic light emitting device.

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