Organic thin film electroluminescent device and its manufacturing method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHideaki Iwanaga, Akira Gyoutoku, Shintarou Hara
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Abstract
The object of the present invention is to provide an organic thin film EL device that has an improved close adherence of a hole injection electrode to an organic thin film layer and a long life, maintaining uniform luminance and minimized performance deterioration over the lapse of time. The organic thin film EL device, which includes an electron injection electrode and a hole injection electrode with an organic thin film layer placed therebetween, has a part or the whole of the hole injection electrode formed of a carbon film. In addition, the carbon film is formed by a sputtering method.
Claims5
A manufacturing method for an organic thin film EL device comprising the steps of:
- (a) forming a transparent electrode layer on a substrate,
- (b) forming a carbon thin film on said transparent electrode layer,
- (c) forming an organic thin film layer that emits light upon an application of an electric field, and
- (d) forming an electron injection electrode on said organic thin film layer, wherein said carbon thin film is disposed between said organic thin film layer and said transparent electrode layer.
A method of manufacturing an organic thin film EL device comprising the steps of:
- forming an organic thin film layer that emits light upon an application of an electric field thereto;
- forming an electron injection electrode disposed on one surface of said organic thin film layer;
- and
- forming a transparent hole injection electrode that is disposed on another surface of said organic thin film layer, which transparent hole injection electrode includes a carbon thin film formed by means of sputtering of a carbon target.
A method of manufacturing an organic thin film EL device comprising the steps of:
- forming an organic thin film layer that emits light upon an application of an electric field thereto;
- forming an electron injection electrode disposed on one surface of said organic thin film layer;
- and
- forming a hole injection electrode that is disposed on another surface of said organic thin film layer, which hole injection electrode includes a carbon thin film formed by means of sputtering fo a carbon target,
- wherein said hole injection electrode is made of indium tin oxide, indium oxide/tin oxide, tin oxide/antimony or zinc oxide/aluminum.
Dependencies are inferred from the claim text.