Multi-component host material and organic electroluminescent device comprising the same

An organic electroluminescent device comprising an anode, a cathode, and an organic layer disposed between the anode and cathode,

• wherein the organic layer comprises one or more light-emitting layers;
• at least one light-emitting layer comprises one or more dopant compounds and two or more host compounds;
• a first host compound of the host compounds is represented by the following formula 1;
• and a second host compound of the host compounds is represented by the following formula 2:
• wherein
• L1 and L2, each independently, represent a single bond, or a substituted or unsubstituted (C6-C30)arylene;
• Ar1 to Ar3, 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 (C6-C30)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, or a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl;
• or may be linked to an adjacent substituent(s) to form a substituted or unsubstituted 3- to 30-membered, mono- or polycyclic, alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from the group consisting of nitrogen, oxygen, and sulfur;
• Ar4 and Ar5, each independently, represent hydrogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted, oxygen or sulfur-containing 3- to 30-membered heteroaryl;
• a and c, each independently, represent an integer of 1 to 4;
• b represents an integer of 1 to 2;
• and where a, b, or c is an integer of 2 or more, each of Ar1, Ar2 or Ar3 may be the same or different;
• wherein
• La represents a single bond, or a substituted or unsubstituted (C6-C30)arylene;
• Ma represents a substituted or unsubstituted, nitrogen-containing 5- to 18-membered heteroaryl;
• and
• Xa to Xh, 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, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, 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 (C1-C30)alkyl(C6-C30)arylamino, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino;
• or may be linked to an adjacent substituent(s) to form a substituted or unsubstituted, 3- to 30-membered, mono- or polycyclic, alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from the group consisting of nitrogen, oxygen, and sulfur;
• wherein the heteroaryl contains at least one hetero atom selected from the group consisting of B, N, O, S, Si, and P.