MULTI-COMPONENT HOST MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME

1 . 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 is represented by the following formula 2:

wherein

L 1 and L 2 , each independently, represent a single bond, or a substituted or unsubstituted (C6-C30)arylene;

Ar 1 to Ar 3 , 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;

Ar 4 and Ar 5 , 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 Ar 1 , Ar 2 or Ar 3 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.

2 . The organic electroluminescent device according to claim 1 , wherein the compound of formula 1 is represented by the following formula 3:

wherein

L 1 , L 2 , Ar 1 to Ar 5 , and a to c are as defined in claim 1 .

3 . The organic electroluminescent device according to claim 1 , wherein L 1 and L 2 , each independently, represent a single bond, or one of the following formulae 4-1 to 4-10:

wherein

X 23 to X 84 , 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; and

4 . The organic electroluminescent device according to claim 1 , wherein Ar 4 and Ar 5 of formula 1, each independently, represent a substituted or unsubstituted (C1-C10)alkyl, a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted naphthylphenyl, a substituted or unsubstituted phenylnaphthyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted benzofluorenyl, a substituted or unsubstituted spirobifluorenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted anthracenyl, a substituted or unsubstituted indenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted pyrenyl, a substituted or unsubstituted tetracenyl, a substituted or unsubstituted perylenyl, a substituted or unsubstituted chrysenyl, a substituted or unsubstituted naphthacenyl, a substituted or unsubstituted fluoranthenyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted naphthobenzofuranyl, a substituted or unsubstituted dibenzothiophenyl, or a substituted or unsubstituted naphthobenzothiophenyl.

5 . The organic electroluminescent device according to claim 1 , wherein Ar 1 to Ar 3 of formula 1, each independently, represent hydrogen, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted 5- to 30-membered heteroaryl, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C10)alkyl(C6-C30)arylamino, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C10)alkyl(C6-C30)arylsilyl, or a substituted or unsubstituted (C1-C10)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.

6 . The organic electroluminescent device according to claim 1 , wherein La of formula 2 represents a single bond, or one of the following formulae 5-1 to 5-10:

wherein

Xi to Xp, 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; and

7 . The organic electroluminescent device according to claim 1 , wherein Ma of formula 2 represents a substituted or unsubstituted pyrrolyl, a substituted or unsubstituted imidazolyl, a substituted or unsubstituted pyrazolyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted tetrazinyl, a substituted or unsubstituted triazolyl, a substituted or unsubstituted tetrazolyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrazinyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted pyridazinyl, a substituted or unsubstituted benzoimidazolyl, a substituted or unsubstituted isoindolyl, a substituted or unsubstituted indolyl, a substituted or unsubstituted indazolyl, a substituted or unsubstituted benzothiadiazolyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted isoquinolyl, a substituted or unsubstituted cinnolinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted naphthyridinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted carbazolyl, or a substituted or unsubstituted phenanthridinyl.

8 . The organic electroluminescent device according to claim 1 , wherein Xa to Xh, each independently, represent hydrogen, a cyano, a substituted or unsubstituted (C6-C15)aryl, a substituted or unsubstituted 6- to 20-membered heteroaryl, or a substituted or unsubstituted tri(C6-C15)arylsilyl; or may be linked to an adjacent substituent(s) to form a substituted or unsubstituted 6- to 20-membered mono- or polycyclic 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.

9 . The organic electroluminescent device according to claim 1 , wherein the compound of formula 1 is selected from the group consisting of:

10 . The organic electroluminescent device according to claim 1 , wherein the compound of formula 2 is selected from the group consisting of:

11 . The organic electroluminescent device according to claim 1 , wherein the dopant compound is a phosphorescent dopant compound.