Organic light-emitting diode

Patent metadata

Field	Value
Publication number	US-10490767-B2
Application number	US-201616072563-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Jan 28, 2016
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

An organic light-emitting diode includes a carrier; at least two electrodes; an organic layer sequence having at least one active zone that generates light; and light-opaque visual protection layers that have no influence on an emission characteristic of the organic layer sequence and the organic light-emitting diode, one of which is located directly on the carrier, the organic layer sequence is located between the two electrodes and one of the electrodes is attached directly to the carrier, the visual protection layer, viewed in a plan view, completely surrounds the organic layer sequence, at least one of the electrodes is provided with a structuring in a region adjacent to the organic layer sequence in a plan view, in a plan view, the structuring is located completely beside the organic layer sequence, and the structuring is hidden by the visual protection layer for a viewer from outside the organic light-emitting diode.

First claim

The invention claimed is:

1. An organic light-emitting diode comprising:
a carrier;
at least two electrodes;
an organic layer sequence having at least one active zone that generates light; and
light-opaque visual protection layers that have no influence on an emission characteristic of the organic layer sequence and the organic light-emitting diode,
wherein one of the light-opaque visual protection layers is located directly on the carrier,
the organic layer sequence is located between the at least two electrodes and one of the at least two electrodes is attached directly to the carrier,
at least one of the light-opaque visual protection layers, viewed in a plan view, completely surrounds the organic layer sequence,
at least one of the at least two electrodes is provided with a structuring in a region adjacent to the light-opaque organic layer sequence in a plan view,
in a plan view, the structuring is located completely beside the organic layer sequence, and
the structuring is hidden by the at least one of the light-opaque visual protection layers for a viewer from outside the organic light-emitting diode.

2. The organic light-emitting diode according to claim 1 , wherein the visual protection layers are electrically conductive and electrically isolated from the at least two electrodes and the organic layer sequence by an insulation layer.

3. The organic light-emitting diode according to claim 1 ,
wherein the at least two electrodes comprise a first electrode and a second electrode,
at least one of the light-opaque visual protection layers extend in places between the first electrode and the carrier,
the first electrode is closer to the carrier than the second electrode, and
the at least one of the light-opaque visual protection layers is only partially covered by the first electrode.

4. The organic light-emitting diode according to claim 1 ,
wherein perpendicular to a main emission direction of the organic layer sequence, at least one of the light-opaque visual protection layers at least partially terminates flush with a region of the organic layer sequence, and the region is supplied with current by the at least two electrodes, and
the organic layer sequence has a negligible electrical transverse conductivity.

5. The organic light-emitting diode according to claim 1 ,
wherein, in a lateral direction, at least one of the light-opaque visual protection layers terminates at least in regions flush with a strip made of a transparent conductive oxide,
the strip completely surrounds the organic layer sequence and is completely arranged beside the organic layer sequence, seen in plan view, and
the strip is applied directly to the carrier and the carrier is light-transmissive.

6. The organic light-emitting diode according to claim 1 ,
wherein at least one of the light-opaque visual protection layers fixedly connects to at least one of the at least two electrodes via an adhesive layer, and
the adhesive layer adheres more strongly to an associated electrode from the at least two electrodes than the associated electrode does to a material on a side opposite the adhesive layer so that the associated electrode is irreversibly fastened to the adhesive layer.

7. The organic light-emitting diode according to claim 1 ,
wherein the at least one of the light-opaque visual protection layers comprise or consist of an organic matrix material and at least one foreign substance dissolved and/or embedded therein, and
the organic matrix material is translucent and the at least one foreign substance is opaque and selected from the group consisting of scattering particles, phosphor, dye and heat-conducting body.

8. The organic light-emitting diode according to claim 1 ,
wherein at least one of the light-opaque visual protection layers comprises or consists of at least two metals,
at least one of the at least two metals also occurs in the at least two electrodes and at least one other of the metals does not occur in the at least two electrodes, and
at least one metal present in the at least one of the light-opaque visual protection layers and in at least one of the at least two electrodes is selected from the group consisting of Ag, Al, Cr and Mg.

9. The organic light-emitting diode according to claim 1 , wherein each one of the at least one of the light-opaque visual protection layers contains a weight proportion of at least 1% and at most 20% of one selected from the group consisting of Au, Bi, Cr, Cu, Mo, Sn, Pt and mixtures thereof.

10. The organic light-emitting diode according to claim 1 ,
wherein the at least two electrodes comprise a first electrode and a second electrode,
the first electrode, located closer to the carrier than the second electrode, comprises metallic central contact strips, and
the at least one of the light-opaque visual protection layers is additionally located between the carrier and the central contact strips.

11. The organic light-emitting diode according to claim 1 ,
wherein the at least two electrodes comprise a first electrode and a second electrode, and
at least the second electrode, located on a side of the organic layer sequence facing away from the carrier, is structured into a plurality of individually controllable sections.

12. The organic light-emitting diode according to claim 11 ,
wherein the second electrode has a plurality of partial regions composed of different materials, and
at least one of the partial regions is completely covered by at least one of the light-opaque visual protection layers.

13. The organic light-emitting diode according to claim 1 , wherein at least one of the light-opaque visual protection layers covers at least one of the at least two electrodes on both sides.

14. The organic light-emitting diode according to claim 1 , wherein at least one of the light-opaque visual protection layers is provided with a roughening for light scattering.

Assignees

• Osram Oled Gmbh

Inventors

• Riegel Nina
• Riedel Daniel
• Wehlus Thomas
• Fleissner Arne
• Heinrichsdobler Armin

Classifications

• H01L27/3241

  Electricity · mapped topic

• H01L51/5284

  Electricity · mapped topic

• H01L51/5237

  Electricity · mapped topic

• H01L51/5203 Primary

  Electricity · mapped topic

• H10K59/19

  Segment displays · CPC title