High resolution organic light-emitting diode devices, displays, and related method
An organic light-emissive display may include a substrate; a plurality of electrodes disposed on the substrate; a first hole conducting layer overlying the plurality of electrodes disposed on the substrate; and organic light emissive material disposed at locations overlying the emissive layer confinement regions. The first hole conducting layer may comprise emissive layer confinement regions exhibiting a first liquid affinity property and 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. The second liquid affinity property of the boundary regions can inhibit migration of the organic light emissive material so as to confine the organic light emissive material within the emissive layer confinement regions.
1. An organic light-emissive display, comprising:
a plurality of electrodes disposed on a substrate, wherein the plurality of electrodes are arranged in an array configuration;
a confinement structure disposed on the substrate, wherein the confinement structure surrounds the plurality of electrodes;
a first hole conducting layer disposed over the plurality of electrodes within the confinement structure, wherein a liquid affinity property of surface portions of the first hole conducting layer are altered to define emissive layer confinement regions within the first hole conducting layer; and
an organic light-emissive layer disposed within each emissive layer confinement region.
2. The display of claim 1 ,
wherein the first hole conducting layer further comprises boundary regions, the emissive layer 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,
wherein the second liquid affinity property of the boundary regions inhibits migration of organic light emissive material upon deposition of the organic light emissive material within the emissive layer confinement regions.
3. The display of claim 1 , further comprising:
a second hole conducting layer disposed between the plurality of electrodes and the first hole conducting layer.
4. The display of claim 1 , wherein each emissive layer confinement region is surrounded by a liquid-repelling region.
5. The display of claim 1 , wherein each emissive layer confinement region is not individually surrounded by a confinement structure.
6. The display of claim 1 , wherein the plurality of electrodes are disposed within an active area of the display.
7. The display of claim 1 , further comprising a second electrode disposed over the organic light emissive layer in each emissive layer confinement region, wherein the plurality of electrodes are a plurality of first electrodes.
8. The display of claim 7 , wherein the plurality of first electrodes are reflective electrodes and the second electrode is a transparent electrode.
9. The display of claim 7 , wherein the plurality of first electrodes are transparent electrodes and the second electrode is a reflective electrode.
10. The display of claim 1 , further comprising a pixel definition layer disposed over a portion of each of the plurality of electrodes.
11. The display of claim 10 , wherein the pixel definition layer has a thickness ranging from about 50 nm to about 1500 nm.
12. The display of claim 1 , wherein:
the first hole conducting layer is a substantially continuous layer of material, and
a surface of the first hole conducting layer facing away from the substrate has a non-planar topography.
13. The display of claim 12 , further comprising a second hole conducting layer disposed between the first hole conducting layer and the substrate.
14. The display of claim 1 , wherein the display is an active matrix display comprising circuitry disposed on the substrate.