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

An organic electroluminescent compound represented by the following formulas 1-1 or 1-2:

• wherein
• X1 and X2, each independently, represents NR1, CR2R3, O, S, P, or P═O;
• L1 and L2, each independently, represent a single bond, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), or a substituted or unsubstituted (C6-C30) arylene;
• Ar1 represents hydrogen, or a substituted or unsubstituted triazinyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, quinolyl, isoquinolyl, cinnolinyl, quinazolinyl, quinoxalinyl, benzofuroquinolinyl, benzofuroquinazolinyl, benzofuronaphthyridinyl, benzofuropyrimidinyl, naphthofuropyrimidinyl, benzothienoquinolinyl, benzothienoquinazolinyl, benzothienonaphthyridinyl, benzothienopyrimidinyl, naphthothienopyrimidinyl, pyrimidoindolyl, benzopyrimidoindolyl, benzofuropyrazinyl, naphthofuropyrazinyl, benzothienopyrazinyl, naphthothienopyrazinyl or pyrazinoindolyl;
• Ar2 represents hydrogen, a substituted or unsubstituted (C6-C30)aryl, 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 (3-to 30-membered)heteroaryl, or —N—(Ar3)(Ar4);
• with the proviso that the case where both Ar1 and Ar2 are hydrogen is excluded;
• R1 to R3, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30) alkyl, a substituted or unsubstituted (C6-C30)aryl, or 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, or a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), and R2 and R3 may be linked to each other to form a spiro ring;
• R4 represents hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or 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 —N—(Ar3)(Ar4);
• or may be linked to adjacent R4 to form a ring(s);
• R5 represents hydrogen or deuterium;
• Ar3 and Ar4, each independently, represent hydrogen, 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;
• c and d, each independently, represent an integer of 1 to 3;
• in which when R4 and R5 are each present in plural, each of R4 and each of R5 may be the same as or different from each other;
• and
• e represents an integer of 1 or 2;
• in which when two Ar1 are present, each of Ar1 may be the same as or different from each other.