Organic electroluminescent compound, organic electroluminescent material comprising the same, and organic electroluminescent device

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

wherein

X represents O or S;

Ar 1 and Ar 2 each independently represent a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted 9,9-dimethylfluorenyl, a substituted or unsubstituted 9,9-diphenylfluorenyl, a substituted or unsubstituted 9,9′-spirobifluorenyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted 9-phenyl-carbazolyl, a substituted or unsubstituted 2-phenylbenzoxazolyl, or a substituted or unsubstituted 2-phenylbenzothiazolyl;

L 1 and L 2 each independently represent a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted terphenylene, a substituted or unsubstituted dibenzothiophenylene, a substituted or unsubstituted 9-phenyl-carbazolylene, a substituted or unsubstituted 9,9-dimethylfluorenylene, a substituted or unsubstituted 9,9-diphenylfluorenylene, or a substituted or unsubstituted 9,9′-spirobifluorenylene;

R 1 to R 4 , R′, and R″ each independently represent hydrogen or deuterium; and

a and d each independently represent an integer of 1 to 4, b represents an integer of 1 to 3; and

when a, b, and d are an integer of 2 or more, each of R 1 , R 2 , and R 4 may be the same or different.

2. The organic electroluminescent compound according to claim 1 , wherein the substituents of the substituted phenyl(ene), the substituted biphenyl(ene), the substituted naphthyl(ene), the substituted terphenyl(ene), the substituted 9,9-dimethylfluorenyl(ene), the substituted 9,9-diphenylfluorenyl(ene), the substituted 9,9′-spirobifluorenyl(ene), the substituted dibenzofuranyl, the substituted dibenzothiophenyl(ene), the substituted 9-phenyl-carbazolyl(ene), the substituted 2-phenylbenzoxazolyl, and the substituted 2-phenylbenzothiazolyl in the Ar 1 , Ar 2 , L 1 , and L 2 each independently represent at least one selected from the group consisting of deuterium, cyano, (C1-05)alkyl, (C6-C12)aryl, and (5- to 15-membered)heteroaryl.

3. The organic electroluminescent compound according to claim 1 , wherein the Ar 1 and Ar 2 each independently are selected from any one of the substituents listed in the following group 1:

4. The organic electroluminescent compound according to claim 1 , wherein the compound represented by formula 1 is selected from the following compounds:

5. An organic electroluminescent material comprising the organic electroluminescent compound according to claim 1 .

6. A plurality of host materials comprising at least one of the organic electroluminescent material according to claim 5 as a first host material, and at least one of a second host material which is different from the first host material.

7. The plurality of host materials according to claim 6 , wherein the second host material comprises a compound represented by the following formula 11:

wherein

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

L 11 represents a single bond or a substituted or unsubstituted (C6-C30)arylene;

X′, X″, X 11 to X 14 , and X 23 to X 26 each independently represent hydrogen, deuterium, halogen, 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 mono- or di-(C1-C30)alkylamino, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or adjacent substituent(s) may be linked to each other to form a ring(s);

m and n each independently represent an integer of 1 to 3; and

when m and n are an integer of 2 or more, each of X′ and X″ may be the same or different.

8. The plurality of host materials according to claim 7 , wherein the compound represented by formula 11 is selected from the following compounds:

9. An organic electroluminescent device comprising the organic electroluminescent compound according to claim 1 .

10. The organic electroluminescent device according to claim 9 , wherein the organic electroluminescent compound is included in a light-emitting layer and/or an electron transport zone.

11. An organic electroluminescent device comprising an anode; a cathode; and at least one light-emitting layer between the anode and the cathode, wherein the at least one light-emitting layer comprise a plurality of host materials according to claim 6 .