ELECTROLUMINESCENT DEVICES WITH MIXED ELECTRON TRANSPORT MATERIALS

ELECTROLUMINESCENT DEVICES WITH MIXED ELECTRON TRANSPORT MATERIALS

An OLED device comprises a cathode, an anode, a light emitting layer, and on the cathode side of said emitting layer, a further layer containing a) a first compound that has the lowest LUMO value of the compounds in the layer, in an amount greater than or equal to 10% by volume and less than 100% by...

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Bibliographische Detailangaben
Hauptverfasser: HATWAR, TUKARAM KISAN, ANDRIEVSKY, NATASHA, BEGLEY, WILLIAM JAMES, YOUNG, RALPH HOWARD
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ELECTRICITY
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Beschreibung
Zusammenfassung:An OLED device comprises a cathode, an anode, a light emitting layer, and on the cathode side of said emitting layer, a further layer containing a) a first compound that has the lowest LUMO value of the compounds in the layer, in an amount greater than or equal to 10% by volume and less than 100% by volume of the layer; b) at least one second compound exhibiting a higher LUMO value than the first compound, where at least one of the second compounds is a low voltage electron transport material, the total amount of such second compounds(s) is less than or equal to 90% by volume of the layer; and c) a metallic material based on a metal having a work function less than 4.2 eV.