A plurality of host materials and organic electroluminescent device comprising the same

A plurality of host materials comprising at least one of a first host compound and at least one of a second host compound, wherein the first host compound is represented by the following formula 1 or 2, and the second host compound is represented by the following formula 3:

• wherein,
• X1 represents —N═, —NR7—, —O— or —S—,
• Y1 represents —N═, —NR8—, —O— or —S—, provided that when X1 represents —N═, Y1 represents —NR8—, —O— or —S—, and when X1 represents —NR7—, Y1 represents —N═, —O— or —S—,
• R1 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl,
• R2 to R8 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 mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, or may be linked to an adjacent substituent to form a substituted or unsubstituted, (C3-C30) mono- or polycyclic, alicyclic, or aromatic ring, whose carbon atom may be replaced with at least one heteroatom selected from nitrogen, oxygen, and sulfur,
• L1 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene,
• a represents 1, b and c each independently represent 1 or 2, d and e each independently represent an integer of 1 to 4,
• the heteroaryl(ene) contains at least one heteroatom selected from B, N, O, S, Si, and P;
• wherein,
• X11 represents —N═, —NR17—, —O— or —S—,
• Y11 represents —N═, —NR18—, —O— or —S—, provided that when X11 represents —N═, Y11 represents —NR18—, —O— or —S—, and when X11 represents —NR17—, Y11 represents —N═, —O— or —S—,
• X represents N or CH,
• R11 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl,
• R12 to R18 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 mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, or may be linked to an adjacent substituent to form a substituted or unsubstituted, (C3-C30) mono- or polycyclic, alicyclic, or aromatic ring, whose carbon atom may be replaced with at least one heteroatom selected from nitrogen, oxygen, and sulfur,
• L2 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene,
• a′ represents 1, b′ and c′ each independently represent 1 or 2, d′ represents an integer of 1 to 4,
• the heteroaryl(ene) contains at least one heteroatom selected from B, N, O, S, Si, and P.