ORGANIC ELECTROLUMINESCENCE ELEMENT

ORGANIC ELECTROLUMINESCENCE ELEMENT

Provided is a thermally activated delayed fluorescent organic electroluminescent device having a low driving voltage, high luminous efficiency, and a long lifetime. The organic electroluminescent device includes light-emitting layers between an anode and a cathode opposite to each other, and at leas...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YOSHIMURA Kazuaki, SAGARA Yuta, OGAWA Junya, NOGUCHI Katsuhide, TADA Masashi, KAWADA Atsushi
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ADHESIVES
CHEMISTRY
DYES
ELECTRICITY
HETEROCYCLIC COMPOUNDS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC CHEMISTRY
PAINTS
POLISHES
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Beschreibung
Zusammenfassung:Provided is a thermally activated delayed fluorescent organic electroluminescent device having a low driving voltage, high luminous efficiency, and a long lifetime. The organic electroluminescent device includes light-emitting layers between an anode and a cathode opposite to each other, and at least one of the light-emitting layers contains a thermally activated delayed fluorescent material, or the thermally activated delayed fluorescent material and a host material. The thermally activated delayed fluorescent material is represented by the following general formula (1) where A represents an electron-withdrawing group, such as a CN group, and D 1 and D 2 each represent an electron-donating group having an indole ring structure.