Material for organic electroluminescence element, and organic electroluminescence element using the same
OwnerSeiji Tomita, Toshihiro Iwakuma +3inventors
InventorsSeiji Tomita, Toshihiro Iwakuma, Takashi Arakane, Hiroya Yasuda, Chishio Hosokawa
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Abstract
A material for an organic electroluminescence (EL) element comprising a compound with a specific condensed ring structure having a nitrogen atom; and an organic EL element which comprises a cathode, an anode and, sandwiched between them, one or more of organic thin film layers, wherein at least one organic thin film layer is an organic EL layer containing the above material for an organic EL element. The material for an organic EL element can provide an organic EL element being capable of achieving high current efficiency with a low electric voltage.
Claims14
A material for organic electroluminescent devices, comprising a compound represented by the following general formula (1):
- wherein A represents an alkylene group having 3 to 6 carbon atoms or an aminoalkylene group having 2 to 5 carbon atoms and containing at least one secondary or tertiary nitrogen atom, and the carbon atoms and nitrogen atom constituting a cyclic structure formed by the group represented by A may have any substituent groups;
- B represents a conjugated unsaturated chain containing three kinds of atoms including carbon, hydrogen and nitrogen or two kinds of atoms including carbon and hydrogen, and the carbon atoms constituting a cyclic structure formed by the group represented by B may have any substituent groups;
- and
- X is represented by L, L-Y or Y-L-Y wherein L is a group directly bonded to N;
- L represents a substituted or unsubstituted aryl group having 6 to 40 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 40 carbon atoms, a linear or branched and substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted cycloalkyl group having 5 to 40 carbon atoms, a substituted or unsubstituted arylene group having 6 to 40 carbon atoms, a substituted or unsubstituted di- or more valent heterocyclic group having 3 to 40 carbon atoms, a linear or branched and substituted or unsubstituted alkylene group having 1 to 30 carbon atoms, or a substituted or unsubstituted cycloalkylene group having 5 to 40 carbon atoms;
- and Y represents a substituted or unsubstituted arylene group having 6 to 40 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 40 carbon atoms, a linear or branched and substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 5 to 40 carbon atoms.
Dependencies are inferred from the claim text.