Organic electroluminescence device

An organic electroluminescence device comprising:

• a cathode;
• an anode;
• and
• an organic layer being interposed between the cathode and the anode, the organic layer comprising one or more layers comprising at least an emitting layer, wherein
• the emitting layer comprises:
• an anthracene derivative represented by a formula (1) below;
• and
• a pyrene derivative represented by a formula (21) below,
• where:
• a variable number c of R1 to R10 is a single bond through which L1 is bonded;
• the rest of R1 to R10 at which L1 is not bonded each represent any one of a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 30 ring carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms and a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms;
• L1 is a single bond or a linking group;
• the linking group is any one of an (a+1)-valent residue obtained by removing a variable number (a+1) of hydrogen atoms from a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, an (a+1)-valent residue obtained by removing a variable number (a+1) of hydrogen atoms from a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, and an (a+1)-valent residue obtained by removing a variable number (a+1) of hydrogen atoms from a group formed by bonding two to four of the substituted or unsubstituted aromatic hydrocarbon groups having 6 to 30 ring carbon atoms and the substituted or unsubstituted heterocyclic groups having 5 to 30 ring atoms;
• a, b and c each represent an integer of 1 to 4;
• and
• Z1 is represented by a formula (2) below,
• where:
• X1 is an oxygen atom or a sulfur atom;
• R111 to R118 are each the same as the rest of R1 to R10 at which L1 is not bonded in the formula (1);
• and
• adjacent two substituents of at least one pair of R111 and R112, R112 and R113, R113 and R114, R115 and R116, R116 and R117, and R117 and R118 are mutually bonded to form a ring represented by a formula (3) or a formula (4) below,
• where:
• y1 and y2 in the formula (3) represent positions where the pair selected from R111 to R118 in the formula (2) are bonded;
• y3 and y4 in the formula (4) represent positions where the pair selected from R111 to R118 in the formula (2) are bonded;
• R121 to R124 and R125 to R128 are each the same as the rest of R1 to R10 at which L1 is not bonded in the formula (1);
• X2 is an oxygen atom or a sulfur atom;
• and
• one of the rest of R111 to R118 not forming the ring in the formula (2) and R121 to R124 in the formula (3) or one of the rest of R111 to R118 not forming the ring in the formula (2) and R125 to R128 in the formula (4) is a single bond through which L1 is bonded in the formula (1),
• where:
• R21 to R28 each represent any one of a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted silyl group and a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms;
• Ar21 to Ar24 each represent a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms;
• and
• at least one of Ar21 to Ar24 is a heterocyclic group represented by a formula (22) below,
• where:
• R211 to R217 each represent any one of a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted silyl group, a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms and a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms;
• each pair of R211 and R212, R212 and R213, R213 and R214, R215 and R216, and R216 and R217 are optionally mutually bonded to form a saturated or unsaturated ring that is optionally substituted;
• X21 is an oxygen atom or a sulfur atom;
• and
• y21 is a single bond through which a nitrogen atom in the formula (21) is bonded.