Plurality of host materials and organic electroluminescent device comprising the same

1. A host material that comprises one or more first host compounds and one or more second host compounds wherein the first host compound is represented by the following formula 1 and the second host compound is represented by the following formula 2:

wherein

L 1 represents a single bond or a substituted or unsubstituted (C6-C30)arylene,

A represents hydrogen, a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted dibenzothiophenyl, or a substituted or unsubstituted dibenzofuranyl,

Ar 1 , Ar 2 , and Ar 3 , each independently, represent a substituted or unsubstituted (C6-C30)aryl(ene), or a substituted or unsubstituted 3- to 30-membered heteroaryl(ene); or Ar 2 and Ar 3 may be linked to form a substituted or unsubstituted 3 to 30-membered, mono- or polycyclic, alicyclic or aromatic ring, or a combination of the alicyclic ring and the aromatic ring, whose carbon atom(s) may be replaced with at least one heteroatom selected from the group consisting of nitrogen, oxygen, and sulfur,

R 1 represents 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, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or R 1 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, or a combination of the alicyclic ring and the aromatic ring,

wherein the heteroaryl(ene) contains one or more heteroatoms selected from the group consisting of B, N, O, S, Si, and P,

a represents an integer of 0 to 4,

and when a is an integer of 2 or more, each of R 1 may be the same or different;

wherein

Ar 4 and Ar 5 , each independently, represent a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (C3-C30)cycloalkyl, or a substituted or unsubstituted 3- to 30-membered heteroaryl,

R 3 and R 4 , each independently, represent 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, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino,

wherein the heteroaryl contains one or more heteroatoms selected from the group consisting of B, N, O, S, Si, and P, and

c represents an integer of 0 to 4; d represents an integer of 0 to 6; and when c or d is an integer of 2 or more, each of R 3 or R 4 may be the same or different.

2. The host material according to claim 1 , wherein formula 2 is represented by any one of the following formulae 12 to 16:

wherein Ar 4 , Ar 5 , R 3 , R 4 , c, and d are as defined in claim 1 .

3. The host material according to claim 1 , wherein the first host compound of formula 1 is selected from the group consisting of:

4. The host material according to claim 1 , wherein the second host compound of formula 2 is selected from the group consisting of:

5. The host material according to claim 1 , wherein formula 1 is represented by any one of the following formulae 3 to 7:

wherein

Ar 1 , Ar 2 , and Ar 3 , each independently, represent a substituted or unsubstituted (C6-C30)aryl(ene), or a substituted or unsubstituted 3 to 30-membered heteroaryl(ene);

X represents S, O or CR 7 R 8 ;

R 2 and R 5 to R 8 , each independently, represent 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, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or R 2 and R 5 to R 8 , each independently, are linked to an adjacent substituent(s) to form a substituted or unsubstituted 3 to 30-membered, mono- or polycyclic, alicyclic or aromatic ring, or a combination of the alicyclic ring and the aromatic ring, whose carbon atom(s) may be replaced with at least one heteroatom selected from the group consisting of nitrogen, oxygen, and sulfur;

b and f, each independently, represent an integer of 0 to 4, and e represents an integer of 0 to 2; when each of b or f represents an integer of 2 or more, or when e represents an integer of 2, each of R 2 , R 5 , or R 6 may be the same or different; and

L 1 , R 1 , and a are as defined in claim 1 .

6. The host material according to claim 5 , wherein formula 3 is represented by any one of the following formulae 8 to 10:

wherein

R 9 to R 12 , each independently, represent 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, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or R 9 to R 12 , each independently, 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, or a combination of the alicyclic ring and the aromatic ring, whose carbon atom(s) may be replaced with at least one heteroatom selected from the group consisting of nitrogen, oxygen, and sulfur;

the heteroaryl contains one or more heteroatoms selected from the group consisting of B, N, O, S, Si, and P;

g and h, each independently, represent an integer of 0 to 6; i represents an integer of 0 to 4; j represents an integer of 0 to 7; when each of g, h, i or j represents an integer of 2 or more, each of R 9 , R 10 , R 11 or R 12 may be the same or different; and

L 1 , R 1 , R 2 , Ar 1 , Ar 2 , Ar 3 , a, and b are as defined in claim 5 .

7. The host material according to claim 5 , wherein formula 4 is represented by the following formula 11:

wherein

R 13 and R 14 , each independently, represent 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, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or R 13 and R 14 , each independently, 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, or a combination of the alicyclic ring and the aromatic ring, whose carbon atom(s) may be replaced with at least one heteroatom selected from the group consisting of nitrogen, oxygen, and sulfur;

the heteroaryl contains one or more heteroatoms selected from the group consisting of B, N, O, S, Si, and P;

k represents an integer of 0 to 4, and m represents an integer of 0 to 7; when each of k or m represents an integer of 2 or more, each of R 13 or R 14 may be the same or different; and

L 1 , R 1 , R 5 , R 6 , Ar 1 , Ar 3 , a, e, and f are as defined in claim 5 .

8. An organic electroluminescent device comprising an anode, a cathode, and at least one light-emitting layer disposed between the anode and cathode, wherein the light-emitting layer comprises a host and a dopant, and the host comprises the host material according to claim 1 .