TRANSPARENT LIGHT-EMITTING COMPONENT

• US 20090267490A1
• Filed: 03/02/2006
• Published: 10/29/2009
• Est. Priority Date: 03/11/2005
• Status: Active Grant

• Current Assignee: Novaled AG
• Original Assignee: Novaled AG
• Inventors: Birnstock, Jan, Murano, Sven, Vehse, Martin
• Granted Patent: US 7,915,815 B2
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 2102/3031 Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/155 comprising dopants
• CPC Class Codes: H10K 50/165 comprising dopants
• CPC Class Codes: H10K 50/816 Multilayers, e.g. transparent multilayers
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 50/858 comprising refractive means, e.g. lenses

Abstract

The invention relates to a transparent light-emitting component, in particular organic light-emitting diode, having a transparent layer arrangement in which are formed, on a substrate in a stack, planar electrodes and an organic region arranged between the planar electrodes, which organic region comprises a light-emitting layer, made from one or a plurality of organic materials. For at least one direction of incidence, a transmittance of the transparent layer arrangement for at least one wavelength subrange in the visible spectral range is greater than 50%. One of the planar electrodes has a metal layer having a thickness of less than 40 nm, and another of the planar electrodes, which is arranged opposite to the electrode in the layer arrangement, has an oxide layer made from an electrically conductive oxide material having a thickness of at least 10 nm, an intensity ratio of at least 2:1 being formed for a light emission emerging on one side of the transparent layer arrangement and a light emission emerging on an opposite side of the transparent layer arrangement.

Claims

1-21. -21. (canceled)

22. Transparent light-emitting component, in particular organic light-emitting diode, having a transparent layer arrangement in which are formed, on a transparent substrate in a stack, planar electrodes and an organic region arranged between the planar electrodes, which organic region comprises a light-emitting layer, made from one or a plurality of organic materials, wherein:

for at least one direction of incidence, a transmittance of the transparent layer arrangement for at least one wavelength subrange in the visible spectral range is greater than 50%;

one of the planar electrodes has a metal layer having a thickness of less than 40 nm;

another of the planar electrodes, which is arranged opposite to the electrode in the layer arrangement, has an oxide layer made from an electrically conductive oxide material having a thickness of at least 10 nm; and

one or a plurality of doped charge carrier transport layers are formed in the organic region;

characterized in that an intensity ratio of at least 2;

1 is formed for a light emission emerging on one side of the transparent layer arrangement and a light emission emerging on an opposite side of the transparent layer arrangement and a coupling-out layer for coupling out light is formed on the electrode and/or the other electrode, wherein the coupling-out layer is made from an organic material.

23. Transparent light-emitting component according to claim 22, characterized in that the electrode and/or the other electrode is a multilayer electrode.

24. Transparent light-emitting component according to claim 23, characterized in that the multilayer electrode comprises at least one oxide layer made from an electrically conductive oxide material and at least one metal layer.

25. Transparent light-emitting component according to claim 23, characterized in that the multilayer electrode comprises a plurality of oxide layers made from in each case an electrically conductive oxide material and/or a plurality of metal layers.

26. Transparent light-emitting component according to claim 24, characterized in that one or all of the oxide layers of the multilayer electrode have a thickness of at least 10 nm.

27. Transparent light-emitting component according to claim 24, characterized in that one or all of the metal layers of the multilayer electrode have a thickness of less than 40 nm.

28. Transparent light-emitting component according to claim 22, characterized in that the coupling-out layer is electrically conductive.

29. Transparent light-emitting component according to claim 22, characterized in that the coupling-out layer has a refractive index of at least 1.3.

30. Transparent light-emitting component according to claim 22, characterized in that the coupling-out layer has a refractive index of at least 1.6.

31. Transparent light-emitting component according to claim 22, characterized in that a coupling-out layer is applied on a side of the transparent substrate which is remote from the organic region.

32. Transparent light-emitting component according to claim 31, characterized in that the coupling-out layer is formed by means of a coupling-out film.

33. Transparent light-emitting component according to claim 22, characterized in that, for the at least one direction of incidence, the transmittance of the transparent layer arrangement for at least one wavelength subrange in the visible spectral range is greater than 60%.

34. Transparent light-emitting component according to claim 22, characterized in that for the at least one direction of incidence, the transmittance of the transparent layer arrangement for at least one wavelength subrange in the visible spectral range is greater than 70%.

35. Transparent light-emitting component according to claim 22, characterized in that for the at least one direction of incidence, the transmittance of the transparent layer arrangement for at least one wavelength subrange in the visible spectral range is greater than 80%.

36. Transparent light-emitting component according to claim 22, characterized in that for the at least one direction of incidence, the transmittance of the transparent layer arrangement for at least one wavelength subrange in the visible spectral range is greater than 90%.

37. Transparent light-emitting component according to claim 22, characterized in that an intensity ratio of at least 3:

1 is formed for the light emission emerging on one side of the transparent layer arrangement and the light emission emerging on the opposite side of the transparent layer arrangement.

38. Transparent light-emitting component according to claim 22, characterized in that an intensity ratio of at least 5:

1 is formed for the light emission emerging on one side of the transparent layer arrangement and the light emission emerging on the opposite side of the transparent layer arrangement.

39. Transparent light-emitting component according to claim 22, characterized in that an intensity ratio of at least 8:

1 is formed for the light emission emerging on one side of the transparent layer arrangement and the light emission emerging on the opposite side of the transparent layer arrangement.

40. Transparent light-emitting component according to claim 22, characterized in that an additional layer having a refractive index of less than 1.4 is formed between the transparent substrate and a planar electrode facing the transparent substrate.