Plurality of host materials and an organic electroluminescence device comprising the same

1. An organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant; the host comprises plural host compounds; at least a first host compound of the plural host compounds is represented by the following formula 1; and a second host compound is represented by the following formula 2,

wherein

A 1 and A 2 each independently represent a substituted or unsubstituted (C6-C30)aryl;

n represents an integer of 0 or 1;

where n is 1, a 5-membered ring including Z 1 is fused with the phenyl ring of carbazole;

a 5-membered ring including Z 2 is fused with the phenyl ring of carbazole;

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

Z 1 and Z 2 each independently represent CR 1 R 2 , NR 3 , O, or S;

X 1 to X 6 , and R 1 to R 3 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-C60)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 mono- or di-(C1-C30)alkylamino, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;

Ma represents a substituted or unsubstituted 5- to 30-membered nitrogen-containing heteroaryl;

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-C60)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 mono- or di-(C1-C30)alkylamino, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;

a and d each independently represent an integer of 1 to 2, b and e each independently represent an integer of 1 to 3, c and f each independently represent an integer of 1 to 4, where a, b, c, d, e, or f is an integer of 2 or more, each of X 1 , each of X 2 , each of X 3 , each of X 4 , each of X 5 , and each of X 6 may be the same or different; and

the heteroaryl contains at least one hetero atom selected from B, N, O, S, Si, and P.

2. The organic electroluminescent device according to claim 1 , wherein formula 1 is represented by one of the following formulas 3 to 6:

wherein

A 1 , A 2 , Z 1 , Z 2 , L 1 , X 1 to X 6 , and a to fare as defined in claim 1 .

3. The organic electroluminescent device according to claim 1 , wherein formula 1 is represented by one of the following formulas 7 to 36:

wherein

A 1 , A 2 , Z 1 , L 1 , X 1 to X b , and a to fare as defined in claim 1 .

4. The organic electroluminescent device according to claim 1 , wherein in formulas 1 and 2, L 1 and La each independently represent a single bond, or one of the following formulas 37 to 49:

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-C60)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 mono- or di-(C1-C30)alkylamino, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or adjacent substituents may be linked to each other to form a substituted or unsubstituted, mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur.

5. The organic electroluminescent device according to claim 1 , wherein in formula 1,

A 1 and A 2 each independently represent phenyl, biphenyl, terphenyl, naphthyl, naphthylphenyl, fluorenyl, phenanthrenyl, anthracenyl, indenyl, triphenylenyl, pyrenyl, tetracenyl, perylenyl, chrysenyl, naphthacenyl, or fluoranthenyl.

6. The organic electroluminescent device according to claim 1 , wherein in formula 1,

X 1 to X 6 , and R 1 to R 3 each independently represent hydrogen, a substituted or unsubstituted (C6-C18)aryl, an unsubstituted triphenylsilyl, a substituted or unsubstituted dibenzothiophene, or a substituted or unsubstituted dibenzofuran.

7. The organic electroluminescent device according to claim 1 , wherein in formula 2,

Ma represents a monocyclic ring-type heteroaryl selected from the group consisting of 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, and a substituted or unsubstituted pyridazinyl, or a fused ring-type heteroaryl selected from the group consisting of a substituted or unsubstituted benzimidazolyl, 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, and a substituted or unsubstituted phenanthridinyl.

8. The organic electroluminescent device according to claim 1 , wherein in formula 2,

Xa to Xh each independently represent hydrogen; a cyano; a (C6-C15)aryl unsubstituted or substituted with a 10- to 20-membered heteroaryl or a tri(C6-C10)arylsilyl; a 10- to 20-membered heteroaryl unsubstituted or substituted with a (C6-C12)aryl or a cyano(C6-C12)aryl; or an unsubstituted tri(C6-C10)arylsilyl; or adjacent substituents may be linked to each other to form a substituted or unsubstituted benzene, a substituted or unsubstituted indole, a substituted or unsubstituted benzoindole, a substituted or unsubstituted indene, a substituted or unsubstituted benzofuran, or a substituted or unsubstituted benzothiophene.

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

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