Organic EL element and production method thereof
AssigneePioneer Corporation
InventorMasahiro Shiratori
Life of this patent
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Abstract
A technology having resistance to moisture and oxygen, and in which the occurrence and expansion of non-light-generating portions, such as dark spots, are suppressed is provided. An organic EL element in which an organic functional layer including at least one or more light-emitting layers is arranged between a first electrode and a second electrode, wherein the organic functional layer includes a bipolar charge generation layer which generates electrons and holes, and one of the first electrode and the second electrode is a hole-receiving electrode.
Claims20
An organic EL element comprising an organic functional layer including at least one or more light-emitting layers, the organic functional layer arranged between a first electrode and a second electrode,
- the organic EL element characterized in that the organic functional layer includes a bipolar charge generation layer which generates electrons and holes, and one of the first electrode and the second electrode is a hole-receiving electrode, and the bipolar charge generation layer is formed from a material that contains an organic semiconductor that has turned into a bipolar substance by oxygen.
A method for producing an organic EL element in which an organic functional layer including at least one or more light-emitting layers is arranged between a first electrode and a second electrode,
- the method characterized by forming a bipolar charge generation layer which generates electrons and holes in one of layers constituting the organic functional layer, so as to use one of the first electrode and the second electrode as a hole-receiving electrode, and
- a material forming the bipolar charge generation layer contains an organic semiconductor that turns into a bipolar substance by oxygen, and
- the bipolar charge generation layer is formed by depositing the material under a vacuum, then exposing it to a gas that contains oxygen or supplying a gas that contains oxygen.
Dependencies are inferred from the claim text.