Organic electroluminescent compound, a plurality of host materials and organic electroluminescent device comprising the same

An organic electroluminescent compound represented by the following formula 1:

• wherein
• R11 to R14 each independently represent hydrogen, deuterium, 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 an adjacent substituent to form a ring, with a proviso that at least one of R11 to R14 is neither hydrogen nor deuterium;
• R1 to R8 each independently represent hydrogen, deuterium, or -L-Ar, or may be linked to an adjacent substituent to form a ring, with a proviso that at least one pair of R1 and R2, R2 and R3, R3 and R4, R5 and R6, R6 and R7, and R7 and R8 is linked to each other to be fused as the following formula a;
• wherein
• X represents NR31, O, S, CR32R33, or —CR34═CR35—;
• R31 represents -L1-Ar1;
• R32 and R33 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 an adjacent substituent to form a ring;
• R34 and R35 each independently represent hydrogen, deuterium, or -L5-Ar5;
• R21 to R24 each independently represent hydrogen, deuterium, or -L2-Ar2, or may be linked to an adjacent substituent to form a ring;
• L, L1, L2, and L5 each independently represent 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;
• Ar, Ar1, Ar2, and Ar5 each independently represent 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, or a substituted or unsubstituted (C1-C30)alkoxy, or are represented by the following formula b or c;
• wherein
• Ra1, Ra2, Rb1, Rb2, and Rb3 each independently represent a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, or a substituted or unsubstituted (C3-C30)cycloalkyl;
• in formula a represents a bonding site with R1 to R8;
• and
• in formulas b and c represents a bonding site with L, L1, L2, or L5, respectively.