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Tandem OLED having stable intermediate connectors

  • US 7,126,267 B2
  • Filed: 05/28/2004
  • Issued: 10/24/2006
  • Est. Priority Date: 05/28/2004
  • Status: Active Grant
First Claim
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1. A tandem OLED comprising:

  • a) an anode;

    b) a cathode;

    c) a plurality of organic electroluminescent units disposed between the anode and the cathode, wherein each organic electroluminescent unit includes at least one light-emitting layer; and

    d) an intermediate connector disposed between each adjacent organic electroluminescent unit, wherein the intermediate connector includes at least a high work function metal layer having a work function of no less than 4.0 eV and a metal compound layer, wherein the intermediate connector has a sheet resistance of higher than 100 kΩ

    per square, wherein the intermediate connector is unpattemed, and wherein the high work function metal layer improves the operational stability of the OLED.

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