Plurality of host materials, organic electroluminescent compound, and organic electroluminescent device comprising the same

A plurality of host materials comprising a first host material comprising a compound represented by the following Formula 1 and a second host material comprising a compound represented by the following Formula 2:

• wherein,
• X1 and Y1 each independently represent —N=, —NR7, —O—, or —S—;
• provided that any one of X1 and Y1 is —N=, and the other of X1 and Y1 is —NR7—, —O—, or —S—;
• R1 represents a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• R2 to R4 and R7 each independently represent hydrogen, deuterium, halogen, 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 of (C3-C30) aliphatic ring and (C6-C30) aromatic ring, or —L11N (Ar1)(Ar2);
• or may be linked to the adjacent substituents to form a ring(s);
• L1 and L11 each independently represent a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
• Ar1 and Ar2 each independently represent hydrogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted fused ring of (C3-C30) aliphatic ring and (C6-C30) aromatic ring, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• R5 and R6 each independently represent a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• and
• b and c each independently represent an integer of 1 or 2, d represents an integer of 1 to 4, and when b to d are an integer of 2 or more, each of R2 to R4 may be the same or different;
• wherein,
• ring A and ring B each independently represent a substituted or unsubstituted (C6-C30)arene or a substituted or unsubstituted (3- to 30-membered)heteroarene;
• R11 and R12 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;
• or may be linked to each other to form a ring(s);
• X2 and Y2 each independently represent —N=, —NR24, —O—, or —S—;
• provided that any one of X2 and Y2 is —N=, and the other of X2 and Y2 is —NR24—, —O—, or —S—;
• R21 to R24 each independently represent hydrogen, deuterium, halogen, 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 of (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or —L3-HAr;
• provided that at least one of R21 to R24 is —L3-HAr;
• L2 and L3 each independently represent a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
• HAr represents a substituted or unsubstituted (3- to 30-membered)heteroaryl containing at least one nitrogen atom;
• and
• n represents an integer of 1 to 4, m represents an integer of 1 to 8, and when n and m are an integer of 2 or more, each of R22 and R23 may be the same or different.