Organic electroluminescent compound, a plurality of host materials 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, the compound represented by formula 1 and the compound represented by the following formula 2 being different from each other:

• in formula 1,
• HAr represents a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• L1 represents a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene,
• R1 to R5, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, —NR13R14 or —SiR15R16R17;
• or may be linked to an adjacent substituent to form a ring(s),
• with the proviso that at least one group of group R5 and R6, group R6 and R7, and group R7 and R5 of formula 1 are fused with * of the following formula 1-a to form a ring(s),
• in formula 1-a,
• Y1 represents O or S,
• R9 to R12, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, —NR18R19 or —SiR20R21R22,
• R13 to R22, each independently, represent hydrogen, deuterium, a halogen, a cyano a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• or may be linked to an adjacent substituent to form a ring(s);
• Dn represents that n hydrogens are replaced with deuterium;
• and
• n represents an integer of 1 to 50;
• in formula 2,
• A1 and A2, each independently, represent a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• L11 represents a single bond, or a substituted or unsubstituted (C6-C30)arylene;
• X′, X″, X11 to X14, and X23 to X26, 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 (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, —NR23R24 or —SiR25R26R27;
• or may be linked to an adjacent substituent to form a ring(s);
• R23 to R27, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• or may be linked to an adjacent substituent to form a ring(s);
• m and n, each independently, represent an integer of 1 to 3;
• and
• if m and n are an integer of 2 or more, each of X′ and each of X″ may be the same or different.