Organic Component

• US 20090009071A1
• Filed: 12/21/2006
• Published: 01/08/2009
• Est. Priority Date: 12/21/2005
• Status: Active Grant

• Current Assignee: Novaled AG
• Original Assignee: Novaled AG
• Inventors: Birnstock, Jan, Hofmann, Michael, Werner, Ansgar, Murano, Sven, Vehse, Martin
• Granted Patent: US 9,112,175 B2
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/155 comprising dopants
• CPC Class Codes: H10K 50/165 comprising dopants
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 50/171 Electron injection layers

Abstract

The invention relates to an organic component, in particular a light-emitting organic component, having an electrode (1; 2) and a counter electrode (2; 1) and also an arrangement of organic layers (3) which is arranged between the electrode (1; 2) and the counterelectrode (2; 1) and which is in electrical contact with the electrode (1; 2) and the counterelectrode (2; 1), the arrangement of organic layers (3) comprising charge carrier transport layers (4, 8) for transporting charge carriers injected from the electrode (1; 2) and from the counterelectrode (2; 1) into the arrangement of organic layers (3), and with an injection layer (5; 9) made from a molecular doping material being formed in the arrangement of organic layers (3) between the electrode (1; 2) and a charge carrier transport layer (4; 8) arranged opposite to the electrode (1; 2), which injection layer is in contact with the charge carrier transport layer (4; 8) arranged opposite to the electrode (1; 2), the molecular doping material having a molecular weight of at least 300 g/mol.

Claims

1. Organic component, in particular light-emitting organic component, having an electrode and a counterelectrode and also an arrangement of organic layers which is arranged between the electrode and the counterelectrode and which is in electrical contact with the electrode and the counterelectrode, the arrangement of organic layers comprising charge carrier transport layers for transporting charge carriers injected from the electrode and from the counterelectrode into the arrangement of organic layers, wherein

an injection layer made from a molecular doping material is formed in the arrangement of organic layers between the electrode and a charge carrier transport layer arranged opposite to the electrodes, which injection layer is in contact with the charge carrier transport layer arranged opposite to the electrode, and

the molecular doping material is provided with a molecular weight of at least 300 g/mol, and

wherein further the injection layer is formed according to one of the following configurations:

the injection layer is made from a molecular doping material of the p-type having a reduction potential which, with respect to Fc/Fc⁺, is greater than or equal to approximately 0 V, wherein the electrode is formed as an anode, and the charge carrier transport layer arranged opposite to the anode is a hole transport layer, and

the injection layer is made from a molecular doping material of the n-type having an oxidation potential which, with respect to Fc/Fc⁺, is less than or equal to approximately −

1.5 V, wherein the electrode is formed as a cathode, and the charge carrier transport layer arranged opposite to the cathode is a electron transport layer.

2. Organic component according to claim 1, wherein, if the electrode is formed as an anode, the counterelectrode is a cathode, and a further injection layer made from a further molecular doping material of the n type is formed in the arrangement of organic layers between the cathode and an electron transport layer arranged opposite to the cathode, which further injection layer is in contact with the electron transport layer arranged opposite to the cathode, the further molecular doping material of the n-type having a molecular weight of at least 300 g/mol.

3. Organic component according to claim 1, characterized in that the charge carrier transport layer arranged opposite to the electrode is a doped charge carrier transport layer.

4. Organic component according to claim 3, characterized in that the charge carrier transport layer arranged opposite to the electrode is doped with the molecular doping material.

5. Organic component according to claim 2 or one of the claim 3, characterized in that the charge carrier transport layer arranged opposite to the counterelectrode is a doped charge carrier transport layer.

6. Organic component according to claim 5, characterized in that the charge carrier transport layer arranged opposite to the counterelectrode is doped with the further molecular doping material.

7. Organic component according to Claim 1, characterized in that the injection layer is formed with a thickness of between approximately 0.1 nm and approximately 100 nm, preferably with a thickness of between approximately 0.5 nm and approximately 10 nm.

8. Organic component according to claim 2, characterized in that the further injection layer (9) is formed with a thickness of between approximately 0.1 nm and approximately 100 nm, preferably with a thickness of between approximately 0.5 nm and approximately 10 nm.

9. Organic component according to claim 1, characterized in that the injection layer is in contact with the electrode.

10. Organic component according to claim 1, characterized in that a metal layer which is in contact with the electrode and the injection layer is formed between the electrode and the injection layer.

11. Organic component according to claim 2, characterized in that the further injection layer is in contact with the counterelectrode.

12. Organic component according to claim 2, characterized in that a further metal layer which is in contact with the counterelectrode and the further injection layer is formed between the counterelectrode and the further injection layer.

13. Organic component according to claim 1, characterized in that one or a plurality of the organic layers in the arrangement of organic layers are formed as vacuum evaporated layers.

14. Organic component according claim 1, characterized in that one or a plurality of the organic layers in the arrangement of organic layers are formed as polymer layers.

15. Organic component according to claim 1, characterized in that the molecular doping material and/or the further molecular doping material have a minimum evaporation temperature of at least 100°

C., preferably of at least 140°

C., more preferably of at least 160°

C.

16. Organic component according to claim 1, characterized in that, for the molecular doping material and/or the further molecular doping material, a difference between the evaporation temperature and the decomposition temperature is at least 20°

C., preferably at least approximately 40°

C., more preferably at least approximately 60°

C.

17. Organic component according to claim 1, characterized in that the molecular doping material of the p-type has a reduction potential which, with respect to Fe/Fe⁺, is greater than or equal to approximately 0.18 V, preferably greater than or equal to approximately 0.24 V.

18. Organic component according to claim 1, characterized in that the molecular doping material of the n type has an oxidation potential which, with respect to Fc/Fc⁺, is less than or equal to approximately −

2.0 V, preferably less than or equal to approximately −

2.2 V.

19. Organic component according to claim 2, characterized in that the further molecular doping material of the n-type has an oxidation potential which, with respect to Fc/Fc⁺, is less than or equal to approximately −

1.5 V, preferably less than or equal to approximately −

2.0 V, and further preferably less than or equal to approximately −

2.2 V.

20. Organic component according to Claim 1, characterized in that the arrangement of organic layers comprises a light-emitting region, with the result that a light-emitting organic component is formed.

21. Organic component according to claim 20, characterized in that the light-emitting organic component is top-emitting.

22. Organic component according to claim 20, characterized in that the light-emitting organic component is bottom-emitting.

23. Organic component according to claim 20, characterized in that the light-emitting organic component is transparent.