Organic light-emitting display panel with anti-crosstalk isolating electrode and preparation method therefor, and display apparatus

1 . An organic light-emitting display panel, comprising:

a substrate;

a plurality of organic light-emitting diodes, wherein the plurality of organic light-emitting diodes is located on the substrate, and each of the plurality of organic light-emitting diodes has a first electrode, a second electrode, a light-emitting layer and a hole injection layer, the light-emitting layer and the hole injection layer are located between the first electrode and the second electrode;

an anti-crosstalk isolating electrode, wherein the anti-crosstalk isolating electrode is located at an interval between two adjacent organic light-emitting diodes, the anti-crosstalk isolating electrode is configured to be connected to a fixed voltage, and a voltage difference between the anti-crosstalk isolating electrode and the second electrode is less than a voltage difference between the first electrode and the second electrode;

wherein the light-emitting layer covers the anti-crosstalk isolating electrode and the first electrode to space apart the anti-crosstalk isolating electrode and the second electrode;

wherein the anti-crosstalk isolating electrode is a ring structure surrounding a sub-pixel; and

wherein the voltage difference between the anti-crosstalk isolating electrode and the second electrode is greater than zero.

2 . The organic light-emitting display panel according to claim 1 , wherein each of the plurality of organic light-emitting diodes is a white organic light-emitting diode.

3 . The organic light-emitting display panel according to claim 2 , wherein each of the plurality of organic light-emitting diodes comprises:

the first electrode;

the hole injection layer, the hole injection layer being located at a side of the first electrode away from the substrate;

a hole transport layer, the hole transport layer being located at a side of the hole injection layer away from the first electrode;

a first light-emitting layer, the first light-emitting layer comprising a plurality of light-emitting sublayers, the plurality of light-emitting sublayers comprising a green light-emitting sublayer, a red light-emitting sublayer and a yellow light-emitting sublayer;

an interlayer, the interlayer being located at a side of the first light-emitting layer away from the hole transport layer;

a second light-emitting layer, the second light-emitting layer being located at a side of the interlayer away from the first light-emitting layer, and a color of light emitted by the second light-emitting layer is different from a color of light emitted by the first light-emitting layer;

a hole barrier layer, the hole barrier layer being located at a side of the second light- emitting layer away from the interlayer;

an electron transport layer, the electron transport layer being located at a side of the hole barrier layer away from the second light-emitting layer;

an electron injection layer, the electron injection layer being located at a side of the electron transport layer away from the hole barrier layer; and

the second electrode, the second electrode being located at a side of the electron injection layer away from the electron transport layer.

4 . The organic light-emitting display panel according to claim 2 , wherein each of the plurality of organic light-emitting diodes comprises:

the first electrode;

the hole injection layer, the hole injection layer being located at a side of the first electrode away from the substrate;

a hole transport layer, the hole transport layer being located at the side of the first electrode away from the substrate;

a first light-emitting layer, the first light-emitting layer being located at a side of the hole transport layer away from the hole injection layer;

an electron transport layer, the electron transport layer being located at a side of the first light-emitting layer away from the hole transport layer;

a charge generation layer, the charge generation layer being located at a side of the electron transport layer away from the first light-emitting layer;

a second hole injection layer, the second hole injection layer being located at a side of the charge generation layer away from the electron transport layer;

a second hole transport layer, the second hole transport layer being located at a side of the second hole injection layer away from the charge generation layer;

a plurality of second light-emitting layers, the plurality of second light-emitting layers being stacked on one another, and being located at a side of the second hole transport layer away from the second hole injection layer;

a second electron transport layer, the second electron transport layer being located at a side of the plurality of second light-emitting layers away from the second hole transport layer;

an electron injection layer, the electron injection layer being located at a side of the electron transport layer away from the plurality of second light-emitting layers; and

the second electrode, the second electrode being located at a side of the electron injection layer away from the electron transport layer.

5 . The organic light-emitting display panel according to claim 1 , further comprising the following elements between the substrate and the first electrode:

a plurality of thin-film transistors, the plurality of thin-film transistors being located at a side of the substrate, and each of the plurality of organic light-emitting diodes being connected to a source electrode of one of the plurality of thin-film transistors, and

a plurality of fan-out lines, the plurality of fan-out lines being located at a side of the plurality of thin-film transistors away from the substrate, and a drain electrode of one of the plurality of thin-film transistors is connected to a corresponding one of the plurality of fan-out lines via a via hole.

6 . The organic light-emitting display panel according to claim 5 , further comprising a pixel defining structure, wherein the pixel defining structure defines a plurality of sub-pixel regions on the substrate for containing the plurality of organic light-emitting diodes, and the pixel defining structure exposes the first electrode located within each of the plurality of sub-pixel regions, and

the anti-crosstalk isolating electrode is located at a side of the pixel defining structure away from the substrate.

7 . The organic light-emitting display panel according to claim 6 , wherein the pixel defining structure has a protrusion at a side of the pixel defining structure facing away from the substrate, the anti-crosstalk isolating electrode is located at the protrusion.

8 . The organic light-emitting display panel according to claim 7 , wherein the first electrode is located within each of the plurality of sub-pixel regions, an edge of the pixel defining structure covers an edge of the first electrode and forms a ramp conforming to the edge of the first electrode at a side of the pixel defining structure away from the substrate, and the protrusion is located between two adjacent ramps.

9 . The organic light-emitting display panel according to claim 5 , wherein the anti-crosstalk isolating electrode and the first electrode are formed from the same material.

10 . The organic light-emitting display panel according to claim 6 , wherein the anti-crosstalk isolating electrode is connected to the fan-out line via a via hole, and another terminal of the fan-out line connected to the anti-crosstalk isolating electrode is connected to a second electrode power supply line.

11 . The organic light-emitting display panel according to claim 1 , wherein the voltage difference between the anti-crosstalk isolating electrode and the second electrode is not higher than a lighting voltage for the plurality of organic light-emitting diodes.

12 . The organic light-emitting display panel according to claim 1 , wherein the material for forming the anti-crosstalk isolating electrode is a metal material for preventing both an electrical crosstalk and an optical crosstalk.

13 . The organic light-emitting display panel according to claim 1 , wherein the anti-crosstalk isolating electrode satisfies at least one of:

the anti-crosstalk isolating electrode being electrically connected to a peripheral power supply terminal via a wiring in the substrate;

a thicknesses of the anti-crosstalk isolating electrode being less than a thicknesses of the first electrode; or

a width of the anti-crosstalk isolating electrode being less than half of a minimum distance between first electrodes of adjacent sub-pixels.

14 . The organic light-emitting display panel according to claim 1 , wherein the anti-crosstalk isolating electrode and the first electrode are arranged in the same layer and spaced apart from each other; or

the anti-crosstalk isolating electrode and the first electrode are arranged in different layers and spaced apart from each other.

15 . The organic light-emitting display panel according to claim 14 , wherein in a case that the anti-crosstalk isolating electrode and the first electrode are arranged in the same layer and spaced apart from each other, the hole injection layer covers the anti-crosstalk isolating electrode and the first electrode, and the hole injection layer is in contact with both the anti-crosstalk isolating electrode and the first electrode.

16 . The organic light-emitting display panel according to claim 1 , wherein the hole injection layer covers the anti-crosstalk isolating electrode and the first electrode, and the hole injection layer is in contact with both the anti-crosstalk isolating electrode and the first electrode.

17 . A display apparatus, comprising an organic light- emitting display panel, wherein the organic light-emitting display panel comprises:

a substrate;

a plurality of organic light-emitting diodes, wherein the plurality of organic light-emitting diodes is located on the substrate, and each of the plurality of organic light-emitting diodes has a first electrode, a second electrode, a light-emitting layer and a hole injection layer, the light-emitting layer and the hole injection layer are located between the first electrode and the second electrode;

an anti-crosstalk isolating electrode, wherein the anti-crosstalk isolating electrode is located at an interval between two adjacent organic light-emitting diodes, the anti-crosstalk isolating electrode is configured to be connected to a fixed voltage, and a voltage difference between the anti-crosstalk isolating electrode and the second electrode is less than a voltage difference between the first electrode and the second electrode;

wherein the light-emitting layer covers the anti-crosstalk isolating electrode and the first electrode to space apart the anti-crosstalk isolating electrode and the second electrode;

wherein the anti-crosstalk isolating electrode is a ring structure surrounding a sub-pixel; and

wherein the voltage difference between the anti-crosstalk isolating electrode and the second electrode is greater than zero.