Organic electroluminescent element
View Patent ↗The present invention provides an organic electroluminescent element having at least one organic layer including a luminescent layer between a pair of electrodes wherein at least one organic layer contains a metal complex of cyclic tetradentate ligand having a specific structure.
1. An organic electroluminescent element having at least one organic layer including a luminescent layer between a pair of electrodes, wherein at least one organic layer comprises at least one compound represented by formula (A-1):
wherein M A1 represents a divalent metal ion, Y A11 , Y A14 , Y A15 and Y A18 independently represent a carbon atom or a nitrogen atom, Y A12 , Y A13 , Y A16 and Y A17 independently represent a substituted or unsubstituted carbon atom, a substituted or unsubstituted nitrogen atom, an oxygen atom or a sulfur atom, L A11 , L A12 , L A13 and L A14 independently represent a linking group, and Q A11 and Q A12 independently represent a partial structure containing an atom bonded to M A1 .
2. The organic electroluminescent element of claim 1 , wherein the compound represented by the formula (A-1) is a compound represented by the following formula (A-2), (A-3) or (A-4):
wherein M A2 represents a metal ion, Y A21 , Y A24 , Y A25 and Y A28 independently represent a carbon atom or a nitrogen atom, Y A22 , Y A23 , Y A26 and Y A27 independently represent a substituted or unsubstituted carbon atom, a substituted or unsubstituted nitrogen atom, an oxygen atom or a sulfur atom, L A21 , L A22 , L A23 and L A24 independently represent a linking group, and Z A21 , Z A22 , Z A23 , Z A24 , Z A25 and Z A26 independently represent a nitrogen atom or substituted or unsubstituted carbon atom;
wherein MA 3 represents a metal ion, Y A31 , Y A34 , Y A35 and Y A38 independently represent a carbon atom or a nitrogen atom, Y A32 , Y A33 , Y A36 and Y A37 independently represent a substituted or unsubstituted carbon atom, a substituted or unsubstituted nitrogen atom, an oxygen atom or a sulfur atom, L A31 , L A32 , L A33 and L A34 independently represent a linking group, and Z A31 , Z A32 , Z A33 and Z A34 independently represent a nitrogen atom or a substituted or unsubstituted carbon atom;
wherein M A4 represents a metal ion, Y A41 , Y A44 , Y A45 and Y A48 independently represent a carbon atom or a nitrogen atom, Y A42 , Y A43 , Y A46 and Y A47 independently represent a substituted or unsubstituted carbon atom, a substituted or unsubstituted nitrogen atom, an oxygen atom or a sulfur atom, L A41 , L A42 , L A43 and L A44 independently represent a linking group, Z A41 , Z A42 , Z A43 , Z A44 , Z A45 and Z A46 independently represent a nitrogen atom or a substituted or unsubstituted carbon atom, and X A41 and X A42 independently represent an oxygen atom, a sulfur atom or a substituted or unsubstituted nitrogen atom.
3. The organic electroluminescent element of claim 1 , wherein the luminescent layer comprises at least one compound represented by the formula (A-1).
4. The organic electroluminescent element of claim 1 , wherein the luminescent layer comprises a host material and at least one compound represented by the formula (A-1).