Display panel and production method thereof

1 . A display panel, comprising:

an array substrate, a first electrode layer, an organic functional layer, and a second electrode layer, which are stacked, the organic functional layer is located between the first electrode layer and the second electrode layer; the first electrode layer comprises at least one electrode block;

wherein the second electrode layer is connected with at least one auxiliary electrode disposed on the array substrate or disposed in the array substrate;

wherein the at least one auxiliary electrode comprises a first material layer, and the first material layer comprises a bottom surface facing the array substrate, and a side surface intersecting with the bottom surface of the first material layer;

wherein an angle between the bottom surface of the first material layer and the side surface of the first material layer is greater than or equal to 60° and less than or equal to 160°;

wherein the display panel further comprises a pixel definition layer;

wherein the pixel definition layer has a plurality of pixel openings, and a top surface of one electrode block is correspondingly exposed from a pixel opening;

wherein the pixel definition layer further comprises a first lap-jointing opening, and the auxiliary electrode and the array substrate are exposed from the first lap-jointing opening;

wherein the first lap-jointing opening comprises a side surface facing the auxiliary electrode, and a bottom surface intersecting the side surface of the first lap-jointing opening;

wherein an angle between the side surface of the first lap-jointing opening and the bottom surface of the first lap-jointing opening is an obtuse angle greater than 140°; and

wherein a distance between an edge of the bottom surface of the first lap-jointing opening and an edge of a bottom surface of the auxiliary electrode is greater than or equal to 3 μm.

2 . The display panel according to claim 1 , wherein the auxiliary electrode further comprises a second material layer, and the second material layer covers a top surface of the first material layer.

3 . The display panel according to claim 2 , wherein the second material layer comprises a bottom surface facing the array substrate, and the bottom surface of the second material layer and the side surface of the first material layer enclose to form a recessed part; and

the second electrode layer is lap-jointed with the auxiliary electrode in the recessed part.

4 . The display panel according to claim 3 , wherein the organic functional layer covers a top surface of the second material layer, and the organic functional layer is lap-jointed with the auxiliary electrode in the recessed part.

5 . The display panel according to claim 3 , wherein an etching rate of a material of the first material layer is greater than an etching rate of a material of the second material layer.

6 . The display panel according to claim 5 , wherein the first material layer is a first metal layer, and the second material layer is a second metal layer; the material of the first metal layer is aluminum, and the material of the second metal layer is titanium or molybdenum.

7 . The display panel according to claim 2 , wherein along a normal direction of a plane in which the array substrate lies, the second material layer has a thickness less than that of the first material layer.

8 . The display panel according to claim 2 , wherein a distance between an edge of the top surface of the first material layer and a side surface of the second material layer is less than or equal to 2 μm.

9 . The display panel according to claim 2 , wherein each of orthographic projections of the first material layer and the second material layer onto the array substrate is a circle, or a regular polygon having more than four sides; and

the orthographic projection of the second material layer onto the first material layer covers the top surface of the first material layer, and the orthographic projection of the second material layer onto the first material layer has an area greater than that of the top surface of the first material layer.

10 . The display panel according to claim 2 , wherein the angle between the bottom surface of the first material layer and the side surface of the first material layer is equal to 90°; or

the angle between the bottom surface of the first material layer and the side surface of the first material layer is greater than 90°; or

the angle β between the bottom surface of the first material layer and the side surface of the first material layer satisfies the following relationship:

β=π−arcsin L 1 /[( L 1 tan E 0 −L 3 ) 2 +L 1 2 ] 1/2 ;

wherein L1 is a thickness of the first material layer along a normal direction of a plane in which the array substrate lies, L3 is a distance between an edge of the top surface of the first material layer and a side surface of the second material layer, and E0 is an evaporation angle at which the organic functional layer is evaporated.

11 . The display panel according to claim 1 , wherein the auxiliary electrode has a thickness of 2500 Å to 10000 Å along a normal direction of a plane in which the array substrate lies;

wherein the auxiliary electrode comprises a plurality of auxiliary electrode wires, the at least one electrode block is a plurality of electrode blocks, the plurality of auxiliary electrode wires are located between the plurality of electrode blocks, respectively, and are insulated from the plurality of electrode blocks, and the plurality of auxiliary electrode wires form a cross grid-like structure; and

wherein the auxiliary electrode is disposed on the array substrate, and the auxiliary electrode is insulated from the at least one electrode block.

12 . The display panel according to claim 11 , wherein the auxiliary electrode further comprises a second material layer and a third material layer; the third material layer, the first material layer, and the second material layer are stacked sequentially along a normal direction of a plane in which the array substrate lies, and a bottom surface of the second material layer and the side surface of the first material layer enclose to form a recessed part; a side surface of the third material layer is flush with an edge of the bottom surface of the first material layer, or, the side surface of the third material layer extends beyond the edge of the bottom surface of the first material layer;

wherein the first material layer is a first metal layer, the second material layer is a second metal layer, and the third material layer is a third metal layer or an inorganic layer; and

wherein a material of the third metal layer is titanium or molybdenum, a material of the first metal layer is aluminum, and a material of the second metal layer is titanium or molybdenum; a material of the inorganic layer comprises at least one of silicon oxide, silicon nitride, silicon oxynitride, and indium tin oxide.

13 . The display panel according to claim 11 , further comprising at least one first etching auxiliary block and at least one second etching auxiliary block, or further comprising at least one first etching auxiliary block or at least one second etching auxiliary block;

wherein the first etching auxiliary block is located between the auxiliary electrode and the array substrate, and an orthographic projection of the first etching auxiliary block onto the array substrate covers an orthographic projection of the auxiliary electrode onto the array substrate;

wherein the second etching auxiliary block is located between the auxiliary electrode and the organic functional layer, an orthographic projection of the second etching auxiliary block onto the array substrate covers the orthographic projection of the auxiliary electrode onto the array substrate; and

wherein a material of the first etching auxiliary block is an inorganic material; the inorganic material comprises at least one of silicon oxide, silicon nitride, silicon oxynitride, and indium tin oxide; a material of the second etching auxiliary block comprises at least one of silicon oxide, silicon nitride, silicon oxynitride, and indium tin oxide.

14 . The display panel according to claim 11 , wherein the auxiliary electrode and the electrode block are disposed in a same layer, and the auxiliary electrode further comprises a second material layer and a third material layer, and the third material layer, the first material layer, and the second material layer are stacked sequentially along a normal direction of a plane in which the array substrate lies; and

a material of the first material layer comprises at least one of silver, aluminum, and neodymium, a material of the second material layer comprises at least one of indium tin oxide and indium zinc oxide, and a material of the third material layer comprises at least one of silver, aluminum, neodymium, indium tin oxide, and indium zinc oxide.

15 . The display panel according to claim 1 , wherein the auxiliary electrode is disposed in the array substrate, and the auxiliary electrode is insulated from the electrode block.

16 . The display panel according to claim 15 , wherein the array substrate comprises a base;

A first insulating layer, a first conductive layer, and a second insulating layer are stacked on the base;

the auxiliary electrode and the first conductive layer are disposed on the first insulating layer; and

the second insulating layer comprises a second lap-jointing opening, and the auxiliary electrode and the first insulating layer are exposed from the second lap-jointing opening; the electrode block is located on the second insulating layer;

wherein the display panel further comprises at least one first etching auxiliary block, the first etching auxiliary block is located between the auxiliary electrode and the first insulating layer, and an orthographic projection of the first etching auxiliary block onto the base covers an orthographic projection of the auxiliary electrode onto the base; and/or, the display panel further comprises at least one second etching auxiliary block, the second etching auxiliary block is located between the auxiliary electrode and the organic functional layer, and an orthographic projection of the second etching auxiliary block onto the base covers the orthographic projection of the auxiliary electrode onto the base.

17 . The display panel according to claim 16 , wherein the pixel definition layer is disposed on the second insulating layer; the pixel definition layer further comprises a third lap-jointing opening, and the third lap-jointing opening is interconnected to the second lap-jointing opening to expose the auxiliary electrode and the first insulating layer.

18 . The display panel according to claim 1 , wherein the display panel further comprises a first power cord; the first power cord is connected to the auxiliary electrode, and the first power cord is configured to provide a power signal to the auxiliary electrode.

19 . The display panel according to claim 1 , wherein the display panel further comprises at least one first etching auxiliary block;

wherein the first etching auxiliary block is located between the auxiliary electrode and the array substrate, and an orthographic projection of the first etching auxiliary block onto the array substrate covers an orthographic projection of the auxiliary electrode onto the array substrate.

20 . A method for producing a display panel for forming the display panel according to claim 1 , comprising:

providing an array substrate having an auxiliary electrode and a first electrode layer, wherein the auxiliary electrode is disposed on the array substrate, or disposed in the array substrate; the auxiliary electrode comprises a first material layer, and the first material layer comprises a bottom surface facing the array substrate, and a side surface intersecting the bottom surface of the first material layer; an angle is formed between the bottom surface of the first material layer and the side surface of the first material layer, and the angle is greater than or equal to 60° and less than or equal to 160°; and the first electrode layer comprises at least one electrode block;

forming a pixel definition layer on the array substrate; and

subsequently forming an organic functional layer and a second electrode layer on the array substrate, wherein the second electrode layer is connected with the auxiliary electrode;

wherein the pixel definition layer is formed with a plurality of pixel openings, and a top surface of one electrode block is correspondingly exposed from a pixel opening;

wherein the pixel definition layer is further formed with a first lap-jointing opening, and the auxiliary electrode and the array substrate are exposed from the first lap-jointing opening;

wherein the first lap-jointing opening comprises a side surface facing the auxiliary electrode, and a bottom surface intersecting the side surface of the first lap-jointing opening;

wherein an angle between the side surface of the first lap-jointing opening and the bottom surface of the first lap-jointing opening is an obtuse angle greater than 140°; and

wherein a distance between an edge of the bottom surface of the first lap-jointing opening and an edge of a bottom surface of the auxiliary electrode is greater than or equal to 3 μm.