Organic electroluminescent compound and organic electroluminescent device comprising the same

1. A compound comprising a ligand having the structure represented by the following formula 1, wherein the ligand is coordinated to a metal having an atomic number greater than 40:

wherein

ring A represents an N-containing 10-membered heteroaryl ring which may be substituted with R 2 ;

ring B represents a (C6-C18)aryl ring which may be substituted with R 3 ;

R 1 to R 3 , each independently, represent deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl, or each of R 1 to R 3 may be linked to each other to form a ring; and

a to c, each independently, represent an integer of 0 to 4, where if a to c, each independently, are an integer of 2 or more, each of R 1 to R 3 may be the same or different.

2. The compound according to claim 1 , wherein the metal is any one selected from iridium, rhenium, osmium, and platinum.

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

wherein

m represents 1 or 2; ring A, ring B, R 1 to R 3 , and a to c are as defined in claim 1 ;

represents any one of the following formulas 2-a to 2-c:

wherein

R 4 to R 6 , each independently, represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C1-C30)alkoxy, an amino, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C6-C30)aryl(C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

R 7 and R 8 , each independently, represent deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C1-C30)alkoxy, an amino, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C6-C30)aryl(C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

R 9 and R 10 , each independently, represent deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, or a substituted or unsubstituted (C6-C30)aryl, or each R 9 and each R 10 may be linked to each other to form a ring;

X represents N or CR 11 ;

R 11 represents hydrogen, deuterium, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (C1-C30)alkyl;

d and e, each independently, represent an integer of 0 to 4, and f and g, each independently, represent an integer of 0 to 3, where if d to g, each independently, are an integer of 2 or more, each of R 7 to R 10 may be the same or different.

4. The compound according to claim 3 , wherein the formula 2 is represented by any one of the following formulas 3 to 10:

wherein, R 1 to R 3 , a to c, m and

each independently, are as defined in claim 3 .

5. The compound according to claim 1 , wherein the substituents of the substituted alkyl, the substituted cycloalkyl, the substituted aryl, or the substituted heteroaryl in R 1 to R 3 , each independently, are at least one selected from the group consisting of deuterium, a halogen, a cyano, a carboxyl, a nitro, a hydroxyl, a (C1-C30)alkyl, a halo(C1-C30)alkyl, a (C2-C30)alkenyl, a (C2-C30)alkynyl, a (C1-C30)alkoxy, a (C1-C30)alkylthio, a (C3-C30)cycloalkyl, a (C3-C30)cycloalkenyl, a (3-to 7-membered)heterocycloalkyl, a (C6-C30)aryloxy, a (C6-C30)arylthio, a (5- to 30-membered)heteroaryl, a (C6-C30)aryl, a tri(C1-C30)alkylsilyl, a tri(C6-C30)arylsilyl, a di(C1-C30)alkyl(C6-C30)arylsilyl, a (C1-C30)alkyldi(C6-C30)arylsilyl, an amino, a mono- or di-(C1-C30)alkylamino, a mono- or di-(C6-C30)arylamino, a (C1-C30)alkyl(C6-C30)arylamino, a (C1-C30)alkylcarbonyl, a (C1-C30)alkoxycarbonyl, a (C6-C30)arylcarbonyl, a di(C6-C30)arylboronyl, a di(C1-C30)alkylboronyl, a (C1-C30)alkyl(C6-C30)arylboronyl, a (C6-C30)aryl(C1-C30)alkyl, and a (C1-C30)alkyl(C6-C30)aryl.

6. The compound according to claim 1 , wherein the compound is selected from the group consisting of the following compounds:

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

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

9. The organic electroluminescent device according to claim 8 , wherein the compound is comprised as a dopant.

10. A display system comprising the compound according to claim 1 .