ORGANIC LIGHT-EMITTING ELEMENT

• US 20200136053A1
• Filed: 04/24/2017
• Published: 04/30/2020
• Est. Priority Date: 04/28/2016
• Status: Active Application

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Heo, Dong Uk, Lee, Dong Hoon, Huh, Jungoh, Jang, Boonjae, Jung, Min Woo, Lee, Ju Young
• Application Number:
  US16/071,126
• Publication Number:
  US 20200136053A1
• Time in Patent Office: Days
• CPC Class Codes: C07D 251/24 to three ring carbon atoms
• CPC Class Codes: C07D 307/77 ortho- or peri-condensed with carbocyclic rings or ring systems
• CPC Class Codes: C07D 307/91 Dibenzofurans; Hydrogenated dibenzofurans
• CPC Class Codes: C09B 1/00 Dyes with anthracene nucleus not condensed with any other ring
• CPC Class Codes: C09B 57/00 Other synthetic dyes of known constitution
• CPC Class Codes: C09B 57/001 Pyrene dyes
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H10K 50/155 comprising dopants
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 50/165 comprising dopants
• CPC Class Codes: H10K 50/171 Electron injection layers
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/654 comprising only nitrogen as heteroatom H10K85/652 takes precedence
• CPC Class Codes: H10K 85/655 comprising only sulfur as heteroatom
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: H10K 85/6574 comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
• CPC Class Codes: H10K 85/6576 comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

The present specification relates to an organic light emitting device having high light emission efficiency.

Claims

1. An organic light emitting device comprising:

a cathode;

an anode provided opposite to the cathode;

a light emitting layer provided between the cathode and the anode, and including an anthracene derivative represented by the following Chemical Formula 2; and

an organic material layer provided between the cathode and the light emitting layer, and including a cyclic compound represented by the following Chemical Formula 1;

2. The organic light emitting device of claim 1, wherein the organic material layer including the cyclic compound represented by Chemical Formula 1 is an electron transfer layer, an electron injection layer, or a layer carrying out electron transfer and electron injection at the same time.

3. The organic light emitting device of claim 1, wherein a HOMO energy level of the cyclic compound represented by Chemical Formula 1 is 6.1 eV or higher.

4. The organic light emitting device of claim 1, wherein triplet energy of the cyclic compound represented by Chemical Formula 1 is 2.6 eV or higher.

5. The organic light emitting device of claim 1, wherein a band gap of the cyclic compound represented by Chemical Formula 1 is 3.3 eV or greater.

6. The organic light emitting device of claim 1, wherein a LUMO energy level of the cyclic compound represented by Chemical Formula 1 is 3 eV or lower.

7. The organic light emitting device of claim 1, wherein electron mobility of the cyclic compound represented by Chemical Formula 1 is 1×

10<sup>−

6</sup> cm²/Vs or greater.

8. The organic light emitting device of claim 1, wherein the organic material layer including the cyclic compound represented by Chemical Formula 1 further includes an n-type dopant represented by the following Chemical Formula 10:

9. The organic light emitting device of claim 8, wherein the n-type dopant represented by Chemical Formula 10 is represented by the following Chemical Formula 10-1 or 10-2:

10. The organic light emitting device of claim 1, wherein the cyclic compound represented by Chemical Formula 1 is represented by any one of the following Compounds 1 to 209:

11. The organic light emitting device of claim 1, wherein Chemical Formula a is represented by any one of the following Chemical Formulae a-1 to a-3:

12. The organic light emitting device of claim 1, wherein the anthracene derivative represented by Chemical Formula 2 is represented by any one of the following Chemical Formulae 2-1 to 2-5:

13. The organic light emitting device of claim 1, wherein the anthracene derivative represented by Chemical Formula 2 is represented by any one of the following compounds:

14. The organic light emitting device of claim 1, wherein the anthracene derivative represented by Chemical Formula 2 is in 30 mol % to 100 mol % based on a total weight of the light emitting layer.

15. The organic light emitting device of claim 1, wherein the anthracene derivative represented by Chemical Formula 2 is a host material.

16. The organic light emitting device of claim 1, wherein the light emitting layer further contains a dopant material.

17. The organic light emitting device of claim 16, wherein the dopant material is an arylamine compound.

18. The organic light emitting device of claim 16, wherein the dopant material is a styrylamine compound.

19. The organic light emitting device of claim 16, wherein the dopant material is an amine derivative represented by the following Chemical Formula 3:

20. The organic light emitting device of claim 19, wherein Chemical Formula 3 is an amine derivative represented by any one of the following Chemical Formulae 3-1 to 3-4:

21. (canceled)

22. (canceled)