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Tandem OLED device with intermediate connector

  • US 7,955,719 B2
  • Filed: 01/30/2008
  • Issued: 06/07/2011
  • Est. Priority Date: 01/30/2008
  • Status: Active Grant
First Claim
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1. A tandem OLED device comprising:

  • (a) an anode;

    (b) a cathode;

    (c) at least two electroluminescent units disposed between the anode and the cathode, wherein each of the electroluminescent units includes at least one hole-transporting layer and one organic light-emitting layer; and

    (d) an intermediate connector disposed between adjacent electroluminescent units,wherein the intermediate connector includes an n-doped organic layer and an electron-accepting layer, the electron-accepting layer being disposed closer to the cathode than the n-doped organic layer,wherein the n-doped organic layer includes an alkali metal and an organic alkali metal complex, andwherein the intermediate connector further includes an undoped layer in contact with the n-doped layer on the side closer to the anode.

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