Organic EL device and method for manufacturing same
View Patent ↗A manufacturing method of an organic EL device, comprising: providing a substrate on which a pixel electrode is arranged, forming a liquid repellent organic film on the substrate and the pixel electrode, radiating a light selectively to an area of the pixel electrode to be coated with an organic functional layer, to oxidize a surface of the pixel electrode, and to change the liquid repellent organic film on the area to a lyophilic organic film or to remove the liquid repellent organic film on the area, applying an ink containing an organic functional material on the area defined by the liquid repellent organic film to form the organic functional layer on the pixel electrode.
1. An organic EL device comprising:
a substrate,
a pixel electrode arranged on the substrate, at least a part of a surface of the pixel electrode being oxidized,
a bank arranged on the substrate and covering a part or whole of an edge of the pixel electrode,
an organic functional layer arranged on the pixel electrode, and
a liquid repellent organic film arranged on the bank and defining an area of the organic functional layer, wherein
the oxidized surface of the pixel electrode has a hole injection function, and an edge of the bank is aligned with an edge of the oxidized surface of the pixel electrode.
2. The organic EL device according to claim 1 , wherein the liquid repellent organic film is not arranged on a portion of the bank surface, the portion lying at a periphery of the pixel electrode.
3. The organic EL device according to claim 1 , wherein the bank is an insulating inorganic film.
4. The organic EL device according to claim 1 , wherein the organic functional layer is also arranged on a portion of the bank surface, the portion lying at a periphery of the pixel electrode.
5. The organic EL device according to claim 1 , wherein the pixel electrode comprises a metal layer and an oxide of a transition metal layer arranged on the metal layer.
6. The organic EL device according to claim 5 , wherein the metal layer is a light reflecting metal layer.
7. The organic EL device according to claim 5 , wherein the oxide of the transition metal is selected from silver oxide, molybdenum oxide, chromium oxide, vanadium oxide, tungsten oxide, nickel oxide, iridium oxide or an combination thereof.
8. The organic EL device according to claim 1 , wherein the pixel electrode is an APC layer or a MoCr layer.
9. The organic EL device according to claim 1 , wherein the liquid repellent organic film is a self-assembly-monolayer.