Organic electro-luminescence display device and method of fabricating the same
AssigneeJapan Display Inc.
InventorsHironori Toyoda, Toshihiro Sato
Life of this patent
Estimating the term…
Abstract
A first substrate provided with a plurality of pixel electrodes is prepared. A bank layer is formed so as to be placed on the periphery of each pixel electrode to define a plurality of pixel regions and contain a metal ion adsorbent. An organic electro-luminescence film is formed so as to be placed on the bank layer and the plurality of pixel electrodes and contain a metal complex which is a compound having a ligand coordinated to a metal ion. A common electrode is formed on the organic electro-luminescence film. The organic electro-luminescence film is formed such that the concentration of the metal ions is decreased above the bank layer by the metal ion adsorbent.
Claims12
A method of fabricating an organic electro-luminescence display device, comprising:
- preparing a substrate provided with a plurality of pixel electrodes;
- forming a bank layer so as to be placed on the periphery of each pixel electrode to define a plurality of pixel regions and contain a metal ion adsorbent;
- forming an organic electro-luminescence film so as to be placed on the bank layer and the plurality of pixel electrodes and contain a metal complex which is a compound having a ligand coordinated to a metal ion;
- and
- forming a common electrode on the organic electro-luminescence film, wherein
- the step of forming an organic electro-luminescence film includes a step of forming each of a hole injection layer and a light-emitting layer so as to be laminated on the plurality of pixel electrodes, and a step of forming an electron injection layer so as to be laminated on the hole injection layer and the light-emitting layer,
- each of the hole injection layer and the light-emitting layer is formed so as to be separated for each of the plurality of pixel regions, thereby exposing a part of the bank layer,
- the electron injection layer is formed so as to be in contact with the part of the bank layer exposed from the hole injection layer and the light-emitting layer, and
- in the step of forming an electron injection layer, the metal ions contained in the electron injection layer are adsorbed by the metal ion adsorbent from the contact region with the bank layer,
- the organic electro-luminescence film is formed such that the concentration of the metal ions is decreased above the bank layer by the metal ion adsorbent.
An organic electro-luminescence display device, comprising:
- a substrate provided with a plurality of pixel electrodes;
- a bank layer which is placed on the periphery of each pixel electrode, defines a plurality of pixel regions, and contains a metal ion adsorbent;
- an organic electro-luminescence film including a hole injection layer laminated on the plurality of pixel electrodes, a light-emitting layer laminated on the hole injection layer, and an electron injection layer laminated on the light-emitting layer,
- wherein
- each of the hole injection layer and the light-emitting layer is separated for each of the plurality of pixel regions, and exposes a part of the bank layer,
- the electron injection layer is in contact with the part of the bank layer, and
- the organic electro-luminescence film has a lower concentration of metal ions in a first region above the bank layer than in residual second regions excluding the first region.
Dependencies are inferred from the claim text.