WHITE ORGANIC EL ELEMENT

WHITE ORGANIC EL ELEMENT

To provide a white organic EL element improved in voltage characteristics and durability characteristics.SOLUTION: A white organic EL element includes an anode 2, a first luminous layer 4a of a blue light emitting layer, a hole blocking layer 5, an electron transport layer 6, and a cathode 7, in the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Miyashita, Hirokazu, Takaya, Itaru, Kajimoto, Norifumi, Ishizuya, Koji, Ito, Takayuki, Kotake, Tomokazu
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:To provide a white organic EL element improved in voltage characteristics and durability characteristics.SOLUTION: A white organic EL element includes an anode 2, a first luminous layer 4a of a blue light emitting layer, a hole blocking layer 5, an electron transport layer 6, and a cathode 7, in the order. The hole blocking layer 5 is adjacent to the first luminous layer 4a and the electron transport layer 6, and a first host and a first dopant emitting blue fluorescence are contained in the first luminous layer 4a. In the white organic EL element, relationships of (a), (b) and (c) are satisfied. (a) LUMO(H1)>LUMO(D1), (b) 0.1