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ORGANIC ELECTROLUMINESCENCE ELEMENT AND METHOD OF MANUFACTURING THEREOF

  • US 20130126848A1
  • Filed: 01/16/2013
  • Published: 05/23/2013
  • Est. Priority Date: 08/06/2010
  • Status: Active Grant
First Claim
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1. An organic EL element comprising:

  • an anode;

    a cathode;

    banks;

    a functional layer between the anode and the cathode, the functional layer including one or more sublayers, the one or more sublayers including a light-emitting sublayer, the light-emitting sublayer defined by the banks and containing an organic material; and

    a hole injection layer between the anode and the functional layer, whereinthe hole injection layer comprises tungsten oxide,tungsten atoms constituting the tungsten oxide include both tungsten atoms with a valence of six and tungsten atoms with a valence less than six,the hole injection layer includes a crystal of the tungsten oxide, a particle diameter of the crystal being on an order of nanometers, the hole injection layer has a surface facing the functional layer and has arecessed structure such that a portion of the surface overlapping with the light-emitting sublayer is located closer to the anode than other portions of the surface, andthe recessed structure has a recessed portion whose inner surface is in contact with the functional layer.

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