Triazine-based compound, method of making the same, and an organic light-emitting device including the same

1. A triazine-based compound having three biphenyl groups, represented by structure 1, below,

wherein R 1 through R 18 are each independently one of: hydrogen, a substituted C 1-30 alkyl group, an unsubstituted C 1-30 alkyl group, a substituted C 6-50 aryl group, an unsubstituted C 6-50 aryl group, a substituted C 4-50 heteroaryl group, and an unsubstituted C 4-50 heteroaryl group, and

at least one of R 1 , R 2 , R 7 , R 8 , R 13 and R 14 is one of: a substituted C 1-30 alkyl group, an unsubstituted C 1-30 alkyl group, a substituted C 6-50 aryl group, an unsubstituted C 6-50 aryl group, a substituted C 4-50 heteroaryl group, and an unsubstituted C 4-50 heteroaryl group.

2. The compound as claimed in claim 1 , wherein substituents of the alkyl group, the aryl group and the heteroaryl group include at least one of: —F; —Cl; —Br; —CN; —NO 2 ; —OH; a C 1-10 alkyl group that is unsubstituted; a C 1-10 alkyl group that is substituted with at least one of —F, —Cl, —Br, —CN, —NO 2 and —OH; a C 1-10 alkoxy group that is unsubstituted; a C 1-10 alkoxy group that is substituted with at least one of —F, —Cl, —Br, —CN, —NO 2 and —OH; a C 6-10 aryl group that is unsubstituted; a C 6-10 aryl group that is substituted with at least one of —F, —Cl, —Br, —CN, —NO 2 and —OH; a C 4-10 heteroaryl group that is unsubstituted; and a C 4-10 heteroaryl group that is substituted with at least one of —F, —Cl, —Br, —CN, —NO 2 and —OH.

3. The compound as claimed in claim 1 , wherein R 1 , R 7 and R 13 are identical, R 2 , R 8 and R 14 are identical, R 3 , R 9 and R 15 are identical, R 4 , R 10 and R 16 are identical, R 5 , R 11 , and R 17 are identical, and R 6 , R 12 and R 18 are identical.

4. The compound as claimed in claim 1 , wherein one of R 1 and R 2 is a methyl group and the other is hydrogen, one of R 7 and R 8 is a methyl group and the other is hydrogen, and one of R 13 and R 14 is a methyl group and the other is hydrogen.

5. The compound as claimed in claim 4 , wherein R 3 , R 4 , R 5 , R 6 , R 9 , R 10 , R 11 , R 12 , R 15 , R 16 , R 17 , and R 18 are each hydrogen.

6. The compound as claimed in claim 1 , wherein one of R 1 and R 2 is a phenyl group and the other is hydrogen, one of R 7 and R 8 is a phenyl group and the other is hydrogen, and one of R 13 and R 14 is a phenyl group and the other is hydrogen.

7. The compound as claimed in claim 6 , wherein R 3 , R 4 , R 5 , R 6 , R 9 , R 10 , R 11 , R 12 , R 15 , R 16 , R 17 , and R 18 are each hydrogen.

8. The compound as claimed in claim 1 , wherein the substitutions of R 1 through R 18 are represented by one of structures 4 and 5, below,

9. A method of making a triazine-based compound having three biphenyl groups, comprising:

reacting a triazine ring-containing compound with a first biphenyl compound such that the biphenyl compound is bonded to a carbon of the triazine ring, wherein:

the first biphenyl compound includes moieties R a and R b :

R a and R b are each independently one of: hydrogen, a substituted C 1-30 alkyl group, an unsubstituted C 1-30 alkyl group, a substituted C 6-50 aryl group, an unsubstituted C 6-50 aryl group, a substituted C 4-50 heteroaryl group, and an unsubstituted C 4-50 heteroaryl group, and

at least one of R a and R b is: a substituted C 1-30 alkyl group, an unsubstituted C 1-30 alkyl group, a substituted C 6-50 aryl group, an unsubstituted C 6-50 aryl group, a substituted C 4-50 heteroaryl group, and an unsubstituted C 4-50 heteroaryl group.

10. The method as claimed in claim 9 , wherein reacting the triazine ring-containing compound with the first biphenyl compound results in three identical biphenyl groups bonded to carbons of the triazine ring.

11. The method as claimed in claim 9 , wherein the first biphenyl compound is prepared by reacting a first benzene ring-containing compound with a second benzene ring-containing compound, and

the first benzene ring-containing compound includes:

a reactive moiety attached to a first carbon of the benzene ring; and

a second moiety attached to the benzene ring ortho to the reactive moiety, wherein the second moiety corresponds to one of R a and R b and is not hydrogen.

12. The method as claimed in claim 9 , wherein the triazine ring-containing compound is a trihalotriazine.

13. An organic light-emitting device, comprising:

a first electrode;

a second electrode; and

at least one organic layer interposed between the first and second electrodes, wherein the at least one organic layer includes a triazine-based compound having three biphenyl groups, represented by structure 1, below,

wherein R 1 through R 18 are each independently one of: hydrogen, a substituted C 1-30 alkyl group, an unsubstituted C 1-30 alkyl group, a substituted C 6-50 aryl group, an unsubstituted C 6-50 aryl group, a substituted C 4-50 heteroaryl group, and an unsubstituted C 4-50 heteroaryl group, and

at least one of R 1 , R 2 , R 7 , R 8 , R 13 and R 14 is one of: a substituted C 1-30 alkyl group, an unsubstituted C 1-30 alkyl group, a substituted C 6-50 aryl group, an unsubstituted C 6-50 aryl group, a substituted C 4-50 heteroaryl group, and an unsubstituted C 4-50 heteroaryl group.

14. The organic light-emitting device as claimed in claim 13 , wherein the at least one organic layer forms one of an emissive layer, a hole-blocking layer and an electron transport layer.

15. The organic light-emitting device as claimed in claim 14 , wherein the at least one organic layer forms an emissive layer, and

the emissive layer includes a colored dopant.

16. The organic light-emitting device as claimed in claim 15 , wherein the colored dopant is one of a red phosphorescent dopant, a green phosphorescent dopant, a blue phosphorescent dopant, a white phosphorescent dopant, a red fluorescent dopant, a green fluorescent dopant, a blue fluorescent dopant, and a white fluorescent dopant.

17. The organic light-emitting device as claimed in claim 14 , wherein the at least one organic layer forms an emissive layer, and the device further comprises:

a second organic layer that forms at least one of a hole-blocking layer and an electron transport layer, the second organic layer including the triazine-based compound having three biphenyl groups.

18. The organic light-emitting device as claimed in claim 17 , wherein the organic light-emitting device structure is selected from the group consisting of: a first electrode/hole transport layer/emissive layer/electron transport layer/second electrode structure, a first electrode/hole injection layer/hole transport layer/emissive layer/electron transport layer/electron injection layer/second electrode structure, and a first electrode/hole injection layer/hole transport layer/emissive layer/hole-blocking layer/electron transport layer/electron injection layer/second electrode structure.

19. A triazine-based compound having three biphenyl groups, represented by structure 1 below:

wherein R 3 , R 4 , R 5 , R 6 , R 9 , R 10 , R 11 , R 12 , R 15 , R 16 , R 17 , and R 18 are, independently, one of hydrogen, an alkyl moiety of about 30 carbons or less, an aryl moiety of about 30 carbons or less, and a heteroaryl moiety of about 50 carbons or less, and

at least one of R 1 , R 2 , R 7 , R 8 , R 13 and R 14 is a moiety effective to rotate the C 1 -C 1 ′ bond of the biphenyl group to which it is attached, so as to disturb the conjugation between the rings of the biphenyl group.

20. The compound as claimed in claim 19 , wherein the alkyl moiety of about 30 carbons or less is one of a substituted C 1-30 alkyl group and an unsubstituted C 1-30 alkyl group,

the aryl moiety of about 30 carbons or less is one of a substituted C 6-50 aryl group and an unsubstituted C 6-50 aryl group, and

the heteroaryl moiety of about 50 carbons or less is one of a substituted C 4-50 heteroaryl group and an unsubstituted C 4-50 heteroaryl group.