Plurality of light-emitting materials, organic electroluminescent compound, and organic electroluminescent device comprising the same

A plurality of light-emitting materials comprising at least one first compound and at least one second compound, wherein the first compound is represented by the following formula 1 and the second compound is represented by the following formula 2:

• wherein,
• T represents O, S, or CR9R10;
• ring A and ring B, each independently, represent a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• R1 to R10, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), or -L3-N(Ar11)(Ar12);
• L1 to L3, each independently, represent a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
• Ar1 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• Ar2, Ar11, and Ar12, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, or a substituted or unsubstituted tri(C6-C30)arylsilyl;
• and
• t represents an integer of 1 or 2, in which if t is 2, each of Ar2 may be the same or different;
• wherein,
• L, each independently, represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
• Ar4 and Ar5, each independently, represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), or -L4-N(Ar13)(Ar14);
• or Ar4 and Ar5 may be linked to each other to form a ring(s);
• n represents an integer of 0 to 2, in which if n is 0, Ar3 is represented by the following formula 2-1, and if n is 2,
• may be the same or different;
• and
• Ar3 is represented by any one of the following formulas 2-1 to 2-5, with the proviso that if in formula 1, both ring A and ring B represent a C6 aryl, L2 represents a single bond, and T represents CR9R10, Ar3 is represented by any one of the following formulas 2-1, 2-3, 2-4 and 2-5:
• wherein,
• Y1 represents B;
• X1 and X2, each independently, represent NR′, O or S;
• W and Z, each independently, represent O, S, NR′ or CR27R28;
• R′, each independently, represents hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), or -L4-N(Ar13)(Ar14);
• and R′ may be linked to at least one of ring C, ring D and ring E, directly or via B, O, S or CR27R28 as a linker, to form a ring(s);
• ring C, ring D, and ring E, each independently, represent a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 50-membered)heteroaryl;
• and ring D and ring E may be linked to each other directly or via B, O, S or CR27R28 as a linker to form a ring(s);
• R11 to R14, R17, R18, and R21 to R26, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), or -L4-N(Ar13)(Ar14);
• R15, R16, R19, R20, R27, and R28, each independently, represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• and at least one of R15 and R16, R19 and R20, and R27 and R28 may be fused to each other to form a spiro structure;
• L4, each independently, represents a single bond, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, a substituted or unsubstituted divalent (C2-C30) aliphatic hydrocarbon group, or a substituted or unsubstituted divalent fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s);
• Ar13 and Ar14, each independently, represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• and
• a, c, h, and i, each independently, represent an integer of 1 or 2;
• b and d, each independently, represent an integer of 1 to 3;
• f, k, and l, each independently, represent an integer of 1 to 6;
• and e, g, and j, each independently, represent an integer of 1 to 4, in which if a to l, each independently, are an integer of 2 or more, each of R11, each of R12, each of R13, each of R14, each of R17, each of R18, each of R21, each of R22, each of R23, each of R24, each of R25, or each of R26 may be the same or different.