Organic electroluminescent element and method for producing same

An organic electroluminescent element comprising at least an anode, a hole transport layer, a luminous layer, an electron transport layer, a cathode and a capping layer in this order,

• wherein the capping layer comprises an amine compound having a benzazole ring structure represented by a general formula (A-1),
• wherein in formula (A-1), A and X may be the same or different from each other, and each represents a monovalent group represented by general formulae (B-4), (B-5), (B-6), or (B-7);
• Z represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group;
• and Ar may be the same or different from each other, and each represents a single bond or a divalent group of a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group,
• wherein in formulae (B-4), (B-5), (B-6) or (B-7), a broken line part is used as a binding site;
• R12 to R15 may be the same or different from each other, and each represents a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, a straight or branched alkyl group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyl group having 5 to 10 carbon atoms which may have a substituent, a straight or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent, a straight or branched alkyloxy group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyloxy group having 5 to 10 carbon atoms which may have a substituent, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic ring group, a substituted or unsubstituted fused polycyclic aromatic group or a substituted or unsubstituted aryloxy group,
• wherein A and X in the general formula (A-1) have a benzazole ring structure, and
• wherein at least one of A and X in the formula (A-1) has a benzazole ring structure represented by the formula (B-5) or (B-7).

An organic electroluminescent element comprising at least an anode, a hole transport layer, a luminous layer, an electron transport layer, a cathode and a capping layer in this order,

• wherein the capping layer comprises an amine compound having a benzazole ring structure represented by a general formula (A-1),
• wherein in formula (A-1), A and X may be the same or different from each other, and each represents a monovalent group represented by general formulae (B-4), (B-5), (B-6), or (B-7);
• Z represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group;
• and Ar may be the same or different from each other, and each represents a single bond or a divalent group of a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group,
• wherein in formulae (B-4), (B-5), (B-6) or (B-7), a broken line part is used as a binding site;
• R12 to R15 may be the same or different from each other, and each represents a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, a straight or branched alkyl group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyl group having 5 to 10 carbon atoms which may have a substituent, a straight or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent, a straight or branched alkyloxy group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyloxy group having 5 to 10 carbon atoms which may have a substituent, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic ring group, a substituted or unsubstituted fused polycyclic aromatic group or a substituted or unsubstituted aryloxy group,
• wherein A and X in the general formula (A-1) have a benzazole ring structure, and
• wherein A and X in the formula (A-1) have a benzazole ring structure represented by the formula (B-5) or (B-7).

An organic electroluminescent element comprising an organic layer which comprises a luminous layer between a first electrode and a second electrode,

• wherein a capping layer is laminated on an opposite surface of the first electrode with respect to the organic layer, and
• the capping layer comprises a tertiary amine compound represented by general formula (A-2) having a benzazole ring structure,
• wherein in formula (A-2), each Ar represents a single bond;
• each of D and E represents a benzazole ring structure represented by formula (B-8), and G is a substituted or unsubstituted aromatic hydrocarbon group, and
• in formula (B-8), R21 and R23 to R26 each represent a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, a linear or branched alkyl group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyl group having 5 to 10 carbon atoms which may have a substituent, a linear or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent, a linear or branched alkyloxy group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyloxy group having 1 to 6 carbon atoms which may have a substituent, a substituted or unsubstituted aromatic hydrocarbon group having 5 to 10 carbon atoms, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted fused polycyclic aromatic group, a substituted or unsubstituted polycyclic aromatic group, or a substituted or unsubstituted aryloxy group, and one of R21 to R26 is a linking group bonded to Ar in formula (A-2);
• and L is selected from a nitrogen atom, an oxygen atom, or a sulfur atom, and when L is selected from an oxygen atom or a sulfur atom, L does not have R26, and
• wherein R22 in the benzazole ring structure represented by formula (B-8), which is D or E, are bonded to N in formula (A-2).