ORGANIC LIGHT-EMITTING COMPONENT AND METHOD FOR PRODUCING AN ORGANIC LIGHT-EMITTING COMPONENT

• US 20160329515A1
• Filed: 01/15/2015
• Published: 11/10/2016
• Est. Priority Date: 01/15/2014
• Status: Abandoned Application

• Current Assignee: OSRAM OLED GMBH (Ams-Osram AG)
• Original Assignee: OSRAM OLED GMBH (Ams-Osram AG)
• Inventors: Fleissner, Arne, Philippens, Marc
• Application Number:
  US15/110,126
• Publication Number:
  US 20160329515A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/331 Nanoparticles used in non-emissive layers, e.g. in packaging layer
• CPC Class Codes: H10K 50/115 comprising active inorganic nanostructures, e.g. luminescent quantum dots
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 50/171 Electron injection layers
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An organic light-emitting component may include a first electrode, an organic functional layer structure over the first electrode in order to generate light, and a second electrode over the organic functional layer structure. The organic functional layer structure includes at least one layer having an organic carrier material, which has a first refractive index, and having nano-additives which are embedded in the carrier material and have a second refractive index, which is greater than the first refractive index, and which have at least one external dimension which is less than one fourth of a predetermined wavelength of the light generated. The nano-additives, the material thereof and/or a fraction thereof relative to the carrier material of the layer are selected and/or predetermined as a function of an optical path length in the organic light-emitting component or as a function of a size of a microcavity of the organic light-emitting component.

Claims

1. An organic light-emitting component, comprising:

a first electrode,

an organic functional layer structure over the first electrode in order to generate light, and

a second electrode over the organic functional layer structure, wherein the organic functional layer structure comprises at least one layer having an organic carrier material, which has a first refractive index, and having nano-additives which are embedded in the carrier material and have a second refractive index, which is greater than the first refractive index, and which have at least one external dimension which is less than one fourth of a predetermined wavelength of the light generated,

wherein the nano-additives, the material of the nano-additives and/or a fraction of the nano-additives relative to the carrier material of the layer are selected and/or predetermined as a function of an optical path length in the organic light-emitting component or as a function of a size of a microcavity of the organic light-emitting component.

2. The organic light-emitting component as claimed in claim 1, wherein the predetermined wavelength is a dominant wavelength of the light generated.

3. The organic light-emitting component as claimed in claim 2, wherein the predetermined wavelength is a shortest dominant wavelength or a longest dominant wavelength of the light generated.

4. The organic light-emitting component as claimed in claim 1, wherein the nano-additives comprise nanoparticles, nanowires, nanodots and/or nanotubes.

5. The organic light-emitting component as claimed in claim 1, wherein the first refractive index lies in a range of between 1.6 and 1.8, and/or wherein the second refractive index lies in a range of between 2.1 and 2.5.

6. The organic light-emitting component as claimed in claim 1, wherein the nano-additives comprise TiO₂, HfO₂, ZrO₂, Nb₂O₅ and/or ZnS.

7. The organic light-emitting component as claimed in claim 1, wherein the carrier material comprises a solution-processed organic semiconductor material.

8. The organic light-emitting component as claimed in claim 1, wherein the carrier material comprises a polymer or soluble small molecules.

9. The organic light-emitting component as claimed in claim 1, wherein a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer and/or an emitter layer of the organic functional layer structure comprises or is formed from the layer having the carrier material and the nano-additives.

10. A method for producing an organic light-emitting component, the method comprising:

forming a first electrode,

forming an organic functional layer structure over the first electrode in order to generate light, and

forming a second electrode over the organic functional layer structure,

wherein the organic functional layer structure is formed in such a way that it comprises at least one layer having an organic carrier material, which has a first refractive index, and having nano-additives which are embedded in the carrier material and have a second refractive index, which is greater than the first refractive index, and which have at least one external dimension which is less than one fourth of a predetermined wavelength of the light generated,

wherein the nano-additives, the material of the nano-additives and/or a fraction of the nano-additives relative to the carrier material of the layer are selected and/or predetermined as a function of an optical path length in the organic light-emitting component or as a function of a size of a microcavity of the organic light-emitting component.

11. The method as claimed in claim 10, wherein the carrier material is applied in the liquid state onto the first electrode, the nano-additives being dissolved or dispersed in the liquid carrier material.

12. The method as claimed in claim 10, wherein the optical path length is the optical path length from an emission zone of the organic functional layer structure to one of the electrodes.

13. An organic light-emitting component, comprising:

a first electrode,

an organic functional layer structure over the first electrode in order to generate light, and

a second electrode over the organic functional layer structure,

wherein the organic functional layer structure comprises at least one layer having an organic carrier material, which has a first refractive index, and having nano-additives which are embedded in the carrier material and have a second refractive index, which is greater than the first refractive index, and which have at least one external dimension which is less than one fourth of a predetermined wavelength of the light generated,

wherein the first electrode and the second electrode are mirrors of a microcavity, and

wherein the nano-additives, the material of the nano-additives and/or a fraction of the nano-additives relative to the carrier material of the layer are selected and/or predetermined depending of a size of the microcavity such that the microcavity is resonant for the predetermined wavelength.

14. The organic light-emitting component as claimed in claim 13, wherein the predetermined wavelength is a dominant wavelength of the light generated.

15. The organic light-emitting component as claimed in claim 14, wherein the predetermined wavelength is a shortest dominant wavelength or a longest dominant wavelength of the light generated.

16. The organic light-emitting component as claimed in claim 13, wherein the nano-additives comprise nanoparticles, nanowires, nanodots and/or nanotubes.