High resolution organic light-emitting diode devices, displays, and related method

Patent metadata

Field	Value
Publication number	US-9444050-B2
Application number	US-201414156188-A
Country	US
Kind code	B2
Filing date	Jan 15, 2014
Priority date	Jan 17, 2013
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

In accordance with an exemplary embodiment of the present disclosure, a method of manufacturing an organic light-emissive display can be provided. A plurality of electrodes can be provided on a substrate. A first hole conducting layer can be deposited via inkjet printing over the plurality of electrodes on the substrate. A liquid affinity property of selected surface portions of the first hole conducting layer can be altered to define emissive layer confinement regions. Each emissive layer confinement region can have a portion that respectively corresponds to each of the plurality of electrodes provided on the substrate. An organic light-emissive layer can be deposited via inkjet printing within each emissive layer confinement region.

First claim

What is claimed is:

1. A method of manufacturing an organic light-emissive display comprising:
providing a plurality of electrodes on a substrate;
depositing, via inkjet printing, a first hole conducting layer over the plurality of electrodes on the substrate;
altering a liquid affinity property of selected surface portions of the first hole conducting layer to define emissive layer confinement regions and boundary regions, the confinement regions exhibiting a first liquid affinity property and the boundary regions exhibiting a second liquid affinity property differing from the first liquid affinity property, a respective confident region overlying at least one of the plurality of electrodes provide on the substrate; and
depositing, via inkjet printing, an organic light emissive material at locations on the first hole conducting layer corresponding to the emissive layer confinement regions, wherein the second liquid affinity property of the boundary regions inhibits migration of the deposited organic light emissive material so as to confine the deposited organic light emissive material within the emissive layer confinement regions.

2. The method of claim 1 , further comprising:
depositing, via ink jet printing, a second hole conducting layer between the plurality of electrodes and the first hole conducting layer.

3. The method of claim 1 , further comprising:
providing a confinement structure on the substrate that surrounds the plurality of electrodes.

4. The method of claim 3 , wherein the plurality of electrodes are disposed within an active area of the display.

5. The method of claim 1 , further comprising:
depositing a second electrode over each organic light emissive layer, wherein the plurality of electrodes are a plurality of first electrodes.

6. The method of claim 5 , wherein the second electrode is blanket coated over all organic light emissive layers.

7. The method of claim 1 , further comprising:
depositing a pixel definition layer over a portion of each of the plurality of electrodes.

8. The method of claim 7 , wherein the pixel definition layer has a thickness ranging from about 50 nm to about 1500 nm.

9. The method of claim 1 , wherein altering the liquid affinity property of surface comprises:
radiating the select surface portions of the first hole conducting layer through openings of a mask.

10. The method of claim 9 , wherein the radiation comprises at least one of infrared radiation, visible wavelength radiation, and ultraviolet radiation.

11. The method of claim 1 , wherein the first hole conducting layer is blanket deposited over the plurality of electrodes to form a substantially continuous layer of material, and wherein a surface that faces away from the substrate has a non-planar topography.

12. The method of claim 1 , wherein the first hole conducting layer is blanket deposited over a second hole conducting layer to form a substantially continuous layer of material, and wherein a surface of the first hole conducting layer that faces away from the second hole conducting layer has a non-planar topography.

13. An organic light-emissive display made by a process comprising:
providing a substrate comprising a plurality of electrodes disposed on the substrate;
depositing, via inkjet printing, a first hole conducting layer over the plurality of electrodes on the substrate;
altering a liquid affinity property of selected surface portions of the first hole conducting layer to define emissive layer confinement regions and boundary regions, the confinement regions exhibiting a first liquid affinity property and the boundary regions exhibiting a second liquid affinity property differing from the first liquid affinity property, a respective confinement region overlying at least one of the plurality of electrodes provided on the substrate; and
depositing, via inkjet printing, an organic light emissive material at locations on the first hole conducting layer corresponding to the emissive layer confinement regions, wherein the second liquid affinity property of the boundary regions inhibits migration of the deposited organic light emissive material so as to confine the deposited organic light emissive material within the emissive layer confinement regions.

14. The display of claim 13 , further comprising:
providing a confinement structure on the substrate, wherein the confinement structure defines a well that surrounds the plurality of electrodes.

15. The display of claim 13 , further comprising:
depositing, via ink jet printing, a second hole conducting layer over the plurality of electrodes on the substrate between the electrodes and the first hole conducting layer.

16. The display of claim 13 , wherein the plurality of electrodes are disposed within an active area of the display.

Assignees

• Kateeva Inc

Inventors

• Madigan Conor F

Classifications

• H10K59/80524

  Transparent cathodes, e.g. comprising thin metal layers · CPC title

• H10K59/80518

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• G09G3/3225 Primary

  using an active matrix · CPC title

• H01L51/0005 Primary

  Electricity · mapped topic