Blue electroluminescent polymer, method of preparing blue electroluminescent polymer, and organic electroluminescent device employing the same
View Patent ↗Provided are a blue electroluminescent (EL) polymer, a method of manufacturing the same, and an organic EL device including the polymer as a light emitting component, wherein an acridine derivative which can transport holes is introduced into a polymer backbone. The polymer is represented by Formula 1: The blue EL polymer has high color purity and color stability.
1. A polymer as represented by Formula 1 below:
where x is from 0.001 to 0.99;
n is from 10 to 150;
Ar 1 is a material selected from the group consisting of a substituted or unsubstituted C6-C30 arylene group, a substituted or unsubstituted C2-C30 heteroarylene group, a substituted or unsubstituted C2-C30 hetero ring group, and a substituted or unsubstituted C2-C30 vinylene group;
R 1 and R 2 are each independently H, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C4-C20 cycloalkyl group, or a substituted or unsubstituted C1-C20 alkoxy group, and R1 and R2 can be connected to each other to form a ring;
R 3 is H, an alkyl group, an alkoxy group, an ester group, a cyano group, an aryl group, a heteroaryl group, a cyclic group, a heterocyclic group, or a fused aromatic group; and
R 4 is a material selected from the group consisting of H, an alkyl group, an alkoxy group, an ester group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 heteroaryl group, a substituted or unsubstituted C2-C30 hetero ring group, a fused aromatic group, and a triphenylamine derivative.
2. The polymer of claim 1 , wherein Ar 1 of Formula 1 is one of Formulas 1A through 1R:
where R 4 of Formulas 1A through 1R is selected from the group consisting of a C1-C12 alkyl group, an alkoxy group, and a substituted or unsubstituted C6-C30 aryl group.
3. The polymer of claim 2 , wherein Ar 1 of Formula 1 is one of Formula 1C and Formula 1Q.
4. The polymer of claim 1 , wherein R 1 and R 2 are connected to form a substituted or unsubstituted cycloalkyl C6-C20 group.
5. The polymer of claim 1 , wherein R 1 and R 2 are connected to form a ring including a hetero atom.
6. The polymer of claim 1 , wherein the polymer is represented by Formula 2A:
7. The polymer of claim 1 , wherein the polymer is represented by Formula 2B:
8. The polymer of claim 1 , wherein the polymer is represented by Formula 2C:
9. The polymer of claim 1 , wherein the polymer is represented by Formula 3:
10. An organic EL device comprising an organic layer formed of the polymer of claim 1 .
11. An organic EL device, comprising:
a pair of electrodes; and
an organic layer between the pair of electrodes, the organic layer comprising a polymer represented by Formula 1:
where x is from 0.001 to 0.99;
n is from 10 to 150;
Ar 1 is a material selected from the group consisting of a substituted or unsubstituted C6-C30 arylene group, a substituted or unsubstituted C2-C30 heteroarylene group, a substituted or unsubstituted C2-C30 hetero ring group, and a substituted or unsubstituted C2-C30 vinylene group;
R 1 and R 2 are each independently H, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C4-C20 cycloalkyl group, or a substituted or unsubstituted C1-C20 alkoxy group, and R1 and R2 can be connected to each other to form a ring;
R 3 is H, an alkyl group, an alkoxy group, an ester group, a cyano group, an aryl group, a heteroaryl group, a cyclic group, a heterocyclic group, or a fused aromatic group; and
R 4 is a material selected from the group consisting of H, an alkyl group, an alkoxy group, an ester group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 heteroaryl group, a substituted or unsubstituted C2-C30 hetero ring group, a fused aromatic group, and a triphenylamine derivative.
12. The organic EL device of claim 11 , wherein the organic layer is at least one of an emissive layer and a hole transporting layer.
13. The organic EL device of claim 11 , wherein Ar 1 of Formula 1 is one of Formulas 1A through 1R:
where R 4 of Formulas 1A through 1R is selected from the group consisting of a C1-C12 alkyl group, an alkoxy group, and a substituted or unsubstituted C6-C30 aryl group.
14. The organic EL device of claim 13 , wherein Ar 1 of Formula 1 is one of Formula 1C and Formula 1Q.
15. The organic EL device of claim of claim 11 , wherein R 1 and R 2 are connected to form a substituted or unsubstituted cycloalkyl C6-C20 group.
16. The organic EL device of claim 11 , wherein R 1 and R 2 are connected to form a ring including a hetero atom.
17. The organic EL device of claim 11 , wherein the polymer is represented by one of Formulae 2A, 2B, 2C and 3:
18. An organic EL device, comprising:
a first electrode;
a second electrode; and
an organic layer comprising an emissive layer between the first electrode and the second electrode, the emissive layer comprising a polymer represented by Formula 1:
where x is from 0.001 to 0.99;
n is from 10 to 150;
Ar 1 is a material selected from the group consisting of a substituted or unsubstituted C6-C30 arylene group, a substituted or unsubstituted C2-C30 heteroarylene group, a substituted or unsubstituted C2-C30 hetero ring group, and a substituted or unsubstituted C2-C30 vinylene group;
R 1 and R 2 are each independently H, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C4-C20 cycloalkyl group, or a substituted or unsubstituted C1-C20 alkoxy group, and R1 and R2 can be connected to each other to form a ring;
R 3 is H, an alkyl group, an alkoxy group, an ester group, a cyano group, an aryl group, a heteroaryl group, a cyclic group, a heterocyclic group, or a fused aromatic group; and
R 4 is a material selected from the group consisting of H, an alkyl group, an alkoxy group, an ester group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 heteroaryl group, a substituted or unsubstituted C2-C30 hetero ring group, a fused aromatic group, and a triphenylamine derivative.
19. The organic EL device of claim 18 , wherein the weight average molecular weight of the polymer is 1,000 to 2,000,000.
20. The organic EL device of claim 18 , wherein the molecular weight distribution of the polymer is 1 to 5.