Organic light-emitting component

Patent metadata

Field	Value
Publication number	US-9252378-B2
Application number	US-201213261884-A
Country	US
Kind code	B2
Filing date	Nov 9, 2012
Priority date	Nov 14, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

An organic light-emitting component includes a translucent substrate, on which an optical coupling-out layer is applied. A translucent electrode overlies the coupling-out layer and an organic functional layer stack having organic functional layers overlies the translucent electrode. The organic functional layer stack includes a first organic light-emitting layer on the translucent electrode and a second organic light-emitting layer on the first organic light-emitting layer. The first organic light-emitting layer includes arbitrarily arranged emitter molecules and the second organic light-emitting layer includes anisotropically oriented emitter molecules having an anisotropic molecular structure.

First claim

The invention claimed is:

1. An organic light-emitting component, comprising:
a translucent substrate;
an optical coupling-out layer overlying the translucent substrate;
a translucent electrode overlying the coupling-out layer;
an organic functional layer stack comprising:
a first organic light-emitting layer overlying the translucent electrode, wherein the first organic light-emitting layer comprises arbitrarily arranged emitter molecules;
a second organic light-emitting layer overlying the first organic light-emitting layer, wherein the second organic light-emitting layer comprises anisotropically oriented emitter molecules having an anisotropic molecular structure; and
a reflective electrode overlying the organic function layer stack.

2. The component according to claim 1 , wherein the first organic light-emitting layer is at a distance of greater than or equal to 150 nm and less than or equal to 225 nm from the reflective electrode.

3. The component according to claim 1 , wherein the second organic light-emitting layer is at a distance of greater than or equal to 30 nm and less than or equal to 100 nm from the reflective electrode.

4. The component according to claim 1 , wherein a distance between the first organic light-emitting layer and the reflective electrode is chosen such that a relative proportion of radiation power generated in the first organic light-emitting layer is less than or equal to 10%, the relative proportion being the proportion of radiation coupled into the reflective electrode in the form of plasmons.

5. The component according to claim 1 , wherein the anisotropically oriented emitter molecules have transition dipole moments, more than 66% of the transition dipole moments being oriented parallel.

6. The component according to claim 1 , further comprising a charge generation layer sequence arranged between the first and second organic light-emitting layers.

7. The component according to claim 6 , wherein the charge generation layer sequence has an n-doped region, p-doped region, and an intermediate layer having a thickness of less than or equal to 4 nm arranged between the n-doped region and the p-doped region.

8. The component according to claim 1 , wherein the second organic light-emitting layer comprises a matrix material in which the anisotropically oriented emitter molecules are arranged.

9. The component according to claim 8 , wherein the matrix material of the second organic light-emitting layer has an anisotropic molecular structure.

10. The component according to claim 1 , wherein the organic functional layer stack comprises at least one organic functional layer which is thicker than 5 nm and which has an absorption coefficient k of less than or equal to 0.005 for part of the visible spectral range.

11. The component according to claim 1 , wherein the translucent electrode has an absorption coefficient k of less than or equal to 0.005 for part of the visible spectral range and a total transmission in the visible spectral range of greater than or equal to 80%.

12. The component according to claim 1 , wherein the reflective electrode has a reflectivity of greater than or equal to 80% in the visible spectral range.

13. The component according to claim 1 , wherein the optical coupling-out layer has a refractive index that is greater than or equal to a layer-thickness-weighted average refractive index of the organic functional layers and the translucent electrode.

14. The component according to claim 1 , wherein the optical coupling-out layer is light-scattering.

15. The component according to claim 1 , wherein at least one or more further organic light-emitting layers are arranged between the translucent electrode and the first organic light-emitting layer.

16. An organic light-emitting component, comprising:
a translucent substrate;
an optical coupling-out layer is overlying the translucent substrate;
a translucent electrode overlying the coupling-out layer;
an organic functional layer stack comprising:
a first organic light-emitting layer overlying the translucent electrode, wherein the first organic light-emitting layer comprises arbitrarily arranged emitter molecules;
a second organic light-emitting layer overlying the first organic light-emitting layer, wherein the second organic light-emitting layer comprises anisotropically oriented emitter molecules having an anisotropic molecular structure and a matrix material in which the anisotropically oriented emitter molecules are arranged; and
a reflective electrode overlying the organic functional layer stack.

Assignees

• Osram Opto Semiconductors Gmbh
• Osram Oled Gmbh

Inventors

• Dobbertin Thomas
• Reusch Thilo
• Setz Daniel Steffen

Classifications

• H10K2102/351

  Thickness · CPC title

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K50/82

  Cathodes · CPC title

• H10K50/81

  Anodes · CPC title

• H10K50/854

  comprising scattering means · CPC title