Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device, the display panel comprises a substrate, a first electrode, a pixel defining layer and a water vapor blocking structure, the first electrode is arranged on one side of the substrate, and the first electrode comprises a metal conductive layer; the pixel defining layer and the first electrode are arranged on the same side of the substrate, and the pixel defining layer defines a pixel opening for exposing the first electrode; the water vapor blocking structure at least partially covers one side, close to the substrate, of the metal conductive layer and at least part of the side wall of the metal conductive layer. The display panel provided by the invention comprises the water vapor blocking structure, and the water vapor blocking structure can block water vapor from a planarization layer and a pixel defining layer in the substrate, so that the water vapor is prevented from invading a metal conductive layer to cause metal ion migration in the metal conductive layer, and the metal ion migration is further prevented from penetrating through a first electrode; damage and material loss of the upper light-emitting functional layer are avoided, pixel failure is avoided, and the display performance of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Art

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] In traditional display panel manufacturing, a fine metal mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also suffers from limitations in precision, high development costs, and long development cycles. Fine metal mask-less technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance characteristics, offering advantages such as high performance, full-size display, and agile delivery. Patent applications CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe relevant aspects of fine metal mask-less technology and are provided for reference.

[0004] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0005] In view of this, the purpose of this application is to propose a display panel that can improve the packaging effect and display performance.

[0006] To achieve the above objectives, this application provides a display panel comprising:

[0007] substrate;

[0008] A first electrode is disposed on one side of the substrate, and the first electrode includes a metal conductive layer;

[0009] A pixel defining layer is disposed on the same side of the substrate as the first electrode, and the pixel defining layer defines a pixel opening that exposes the first electrode;

[0010] A moisture-blocking structure that at least partially covers the side of the metal conductive layer near the substrate and at least a portion of the sidewalls of the metal conductive layer.

[0011] In one implementation,

[0012] Preferably, the moisture barrier structure includes a first part and a second part, the first part wrapping the side of the metal conductive layer near the substrate, and the second part wrapping the sidewall of the metal conductive layer.

[0013] In one embodiment, the first electrode further includes a first transparent conductive layer and a second transparent conductive layer, the first transparent conductive layer being located between the metal conductive layer and the substrate, the second transparent conductive layer being located on the side of the metal conductive layer away from the substrate, and the first portion being located between the metal conductive layer and the first transparent conductive layer;

[0014] Preferably, the second portion at least partially covers the sidewall of the second transparent conductive layer;

[0015] Preferably, the second portion encloses the sidewall of the second transparent conductive layer;

[0016] Preferably, the second portion at least partially covers the sidewall of the first transparent conductive layer;

[0017] Preferably, the water vapor barrier structure encloses the sidewalls of the first transparent conductive layer, the metal conductive layer, and the second transparent conductive layer;

[0018] Preferably, the material of the metal conductive layer includes Ag, and the materials of the first transparent conductive layer and the second transparent conductive layer include ITO.

[0019] In one embodiment, the display panel further includes:

[0020] An isolation structure is disposed on the side of the pixel defining layer away from the substrate, and the isolation structure encloses and forms an isolation opening corresponding to the pixel opening.

[0021] In one embodiment, the isolation structure includes a support portion and a crown portion, the crown portion being located on the side of the support portion away from the substrate, the area of ​​the orthographic projection of the support portion on the substrate being smaller than the area of ​​the orthographic projection of the crown portion on the substrate, and the orthographic projection of the support portion on the substrate being located within the orthographic projection of the crown portion on the substrate.

[0022] In one embodiment, the support portion includes a first support portion and a second support portion, the first support portion being located between the second support portion and the substrate, and the orthographic projection of the second support portion on the substrate being located within the orthographic projection of the first support portion on the substrate.

[0023] In one embodiment, the display panel further includes:

[0024] A light-emitting functional layer is disposed within the isolation opening and covers the first electrode, and the light-emitting functional layer is isolated by the isolation structure;

[0025] The second electrode is disposed within the isolation opening and covers the light-emitting functional layer, and the second electrode overlaps with the isolation structure;

[0026] The first electrode, the light-emitting functional layer, and the second electrode constitute a light-emitting unit;

[0027] Preferably, the first electrode includes an anode, and the second electrode includes a cathode.

[0028] In one embodiment, the isolation opening includes a first type of opening, a second type of opening, and a third type of opening, wherein the first type of opening, the second type of opening, and the third type of opening respectively define the light-emitting units with different emitted light colors.

[0029] In one embodiment, the display panel further includes a first encapsulation layer that covers the second electrode and a portion of the isolation structure.

[0030] In one embodiment, the display panel further includes a second encapsulation layer and a third encapsulation layer, wherein the second encapsulation layer is disposed on the side of the first encapsulation layer away from the substrate, and the third encapsulation layer is disposed on the side of the second encapsulation layer away from the substrate.

[0031] Based on the same inventive concept, this application also discloses a method for manufacturing a display panel, which includes:

[0032] A moisture barrier structure and a first electrode are formed on one side of a substrate; wherein the first electrode includes a metal conductive layer, and the moisture barrier structure at least partially covers the side of the metal conductive layer near the substrate and at least part of the sidewall of the metal conductive layer.

[0033] A pixel defining layer is formed on the same side of the first electrode relative to the substrate; wherein the pixel defining layer defines a pixel opening that exposes the first electrode.

[0034] In one embodiment, the first electrode further includes a first transparent conductive layer and a second transparent conductive layer; a moisture barrier structure and the first electrode are formed on one side of the substrate, comprising:

[0035] A first transparent conductive layer, a moisture barrier structure, a metal conductive layer, and a second transparent conductive layer are sequentially formed on one side of the substrate; wherein the moisture barrier structure at least partially covers the sidewall of the second transparent conductive layer.

[0036] In one embodiment, after forming the pixel defining layer on the same side of the first electrode opposite to the substrate, the method further includes:

[0037] An isolation structure is formed on one side of the substrate of the pixel defining layer; wherein the isolation structure surrounds an isolation opening corresponding to the pixel opening.

[0038] In one embodiment, after forming the isolation structure on one side of the substrate of the pixel defining layer, the method further includes:

[0039] A light-emitting functional layer is formed within the isolation opening; wherein the light-emitting functional layer covers the first electrode;

[0040] A second electrode is formed within the isolation opening; wherein the second electrode covers the light-emitting functional layer, and the first electrode, the light-emitting functional layer, and the second electrode constitute a light-emitting unit.

[0041] Based on the same inventive concept, this application also discloses a display device, which includes the above-described display panel.

[0042] Compared with the prior art, the display panel provided in this application includes a metal conductive layer as its first electrode and is provided with a moisture barrier structure. The moisture barrier structure at least partially covers the side of the metal conductive layer near the substrate and at least part of the sidewall of the metal conductive layer. The moisture barrier structure can block moisture from the planarization layer and pixel defining layer in the substrate, preventing moisture from invading the metal conductive layer from the bottom and sidewalls, thereby preventing the migration of metal ions in the metal conductive layer caused by moisture intrusion, and thus preventing the metal ions from penetrating the first electrode, avoiding damage and material loss to the upper light-emitting functional layer, avoiding pixel failure, and improving the display performance of the display panel. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the layer structure of a display panel provided in an embodiment of this application;

[0045] Figure 2 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0046] Figure 3 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0047] Figure 4 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0048] Figure 5 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0049] Figure 6 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0050] Figure 7 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0051] Figure 8 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0052] Figure 9 A schematic diagram of a display panel provided for another embodiment of this application;

[0053] Figure 10 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0054] Figure 11 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0055] Figure 12 A schematic diagram of the layer structure of a display panel provided in another embodiment of this application;

[0056] Figure 13 A flowchart of a method for manufacturing a display panel is provided for another embodiment of this application.

[0057] Marking Description:

[0058] 100. Display panel;

[0059] 1. Substrate; 11. Planarization layer;

[0060] 2. Isolation structure; 21. Isolation opening; 22. Supporting part; 221. First supporting part; 222. Second supporting part; 23. Crown;

[0061] 3. Light-emitting unit; 31. First electrode; 311. Metal conductive layer; 312. First transparent conductive layer; 313. Second transparent conductive layer; 32. Light-emitting functional layer; 33. Second electrode;

[0062] 4. Pixel demarcation layer; 41. Pixel aperture;

[0063] 5. Water vapor barrier structure; 51. First part; 52. Second part;

[0064] 61. First encapsulation layer; 62. Second encapsulation layer; 63. Third encapsulation layer. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0066] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0067] Through long-term research, the inventors discovered that in current display panels, the planarization layer below the anode absorbs moisture from the air during the manufacturing process. The pixel boundary layer is not strong enough to block moisture, so the moisture invades the metal conductive layer in the anode, causing metal ions to migrate. This migration of metal ions can penetrate the anode, resulting in damage and material loss to the light-emitting functional layer above the anode, causing pixel dark spots.

[0068] Based on this, this application provides a display panel solution, as detailed in the following embodiments.

[0069] Reference Figure 1 As shown, one embodiment of this application discloses a display panel 100, which includes a substrate 1, a first electrode 31, a pixel defining layer 4, and a moisture barrier structure 5.

[0070] A first electrode 31 is disposed on one side of the substrate 1, and the first electrode 31 includes a metal conductive layer 311; a pixel defining layer 4 is disposed on the same side of the substrate 1 as the first electrode 31, and the pixel defining layer 4 defines a pixel opening 41 that exposes the first electrode 31; a moisture barrier structure 5 at least partially covers the side of the metal conductive layer 311 near the substrate 1 and at least part of the sidewalls of the metal conductive layer 311. The substrate 1 includes a planarization layer 11.

[0071] The display panel 100 provided in this embodiment includes a first electrode 31 comprising a metal conductive layer 311 and a moisture barrier structure 5. The moisture barrier structure 5 is at least partially located between the substrate 1 and the metal conductive layer 311 of the first electrode 31. The moisture barrier structure 5 can block moisture from the planarization layer 11 and the pixel defining layer 4, preventing moisture from invading the metal conductive layer 311 from the bottom and sidewalls, thereby preventing the migration of metal ions in the metal conductive layer 311 caused by moisture intrusion, and thus preventing the metal ions from penetrating the first electrode 31, avoiding damage and material loss to the upper light-emitting functional layer 32, avoiding pixel failure and abnormal light emission of the display panel 100, and improving the display performance of the display panel 100.

[0072] Reference Figure 2 As shown, in one embodiment, the moisture barrier structure 5 includes a first portion 51 and a second portion 52. The first portion 51 covers the side of the metal conductive layer 311 near the substrate 1, and the second portion 52 covers the sidewall of the metal conductive layer 311. The first portion 51 prevents moisture from entering from the bottom of the metal conductive layer 311, and the second portion 52 prevents moisture from entering from the sidewall of the metal conductive layer 311.

[0073] Reference Figure 3 As shown, in one embodiment, the first electrode 31 further includes a first transparent conductive layer 312 and a second transparent conductive layer 313. The first transparent conductive layer 312 is located between the metal conductive layer 311 and the substrate 1, and the second transparent conductive layer 313 is located on the side of the metal conductive layer 311 away from the substrate 1. The first portion 51 is located between the metal conductive layer 311 and the first transparent conductive layer 312. The first transparent conductive layer 312 and the second transparent conductive layer 313 ensure good light transmittance, allowing emitted light to pass through smoothly, while also possessing a certain degree of conductivity. Working in conjunction with the metal conductive layer 311, they achieve good charge injection and transport. This multilayer structure can improve the interface characteristics between the anode and the organic material, facilitating hole injection from the anode into the organic light-emitting layer, thereby improving the device's performance and lifespan.

[0074] Reference Figure 4As shown, in one embodiment, the second portion 52 at least partially covers the sidewall of the second transparent conductive layer 313, thereby protecting the sidewall of the second transparent conductive layer 313, improving the interface bonding force, and enhancing the water vapor blocking effect.

[0075] Reference Figure 5 As shown, preferably, the second part 52 wraps around the sidewall of the second transparent conductive layer 313 to further enhance the water vapor blocking effect.

[0076] Reference Figure 6 As shown, in one embodiment, the second part 52 at least partially covers the sidewall of the first transparent conductive layer 312, thereby protecting the sidewall of the first transparent conductive layer 312, improving the interface bonding force, and enhancing the water vapor blocking effect.

[0077] Reference Figure 7 As shown, preferably, the water vapor barrier structure 5 wraps around the sidewalls of the first transparent conductive layer 312, the metal conductive layer 311, and the second transparent conductive layer 313, thereby achieving comprehensive protection of the sidewalls of the first electrode 31 and improving the water vapor barrier effect.

[0078] Preferably, the material of the metal conductive layer 311 includes Ag, and the material of the first transparent conductive layer 312 and the second transparent conductive layer 313 includes ITO. Metallic Ag has excellent conductivity, which can significantly reduce the overall resistance of the anode. The ITO layers on both sides also have a certain degree of conductivity; combined with the Ag layers, they ensure efficient current transmission in the anode, reducing energy loss and heat generation due to resistance, and improving the power efficiency of the display panel. Simultaneously, this structure allows the current to be evenly distributed across the entire anode surface, thereby ensuring the uniformity of pixel light emission, avoiding localized over-brightness or under-brightness, and improving display quality. In other embodiments, the first electrode 31 can be a Ti / Al / ITO or ZnO / Ag / ZnO structure.

[0079] Optionally, the water vapor barrier structure 5 can be a metal oxide such as Al2O3 or TiO2.

[0080] The water vapor barrier structure 5 can also be a composite of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS) and nanoclay: PEDOT:PSS is a commonly used conductive polymer with good conductivity and transparency. Nanoclay has a layered structure, which has a certain barrier effect on water vapor. Combining nanoclay with PEDOT:PSS can improve its water vapor barrier ability without significantly reducing the conductivity of PEDOT:PSS.

[0081] The water vapor barrier structure 5 can also be a composite of polypyrrole (PPy) and graphene oxide (GO): polypyrrole is a polymer with good electrical conductivity, while graphene oxide has a large specific surface area and certain barrier properties. Combining PPy and GO allows PPy to provide conductivity, while GO can form a barrier layer in the composite material, hindering the penetration of water vapor.

[0082] Reference Figure 8-9 As shown, in one embodiment, the display panel 100 further includes an isolation structure 2 disposed on the side of the pixel defining layer 4 away from the substrate 1, and the isolation structure 2 encloses and forms an isolation opening 21 corresponding to the pixel opening 41.

[0083] The isolation structure 2 forms an isolation opening 21 for accommodating the light-emitting unit 3, and adjacent light-emitting units 3 are separated by the isolation structure 2.

[0084] In this process, by setting an isolation structure 2 at the gap between the light-emitting units 3, the functional film layers of adjacent light-emitting units 3 are separated. Thus, in the evaporation process of multiple functional film layers, it is only necessary to perform evaporation on the entire display panel, without using a mask to evaporate the area where the light-emitting units 3 are located to form functional film layers. Therefore, the process of using the isolation structure 2 for evaporation does not need to consider the alignment accuracy problem during evaporation, thereby allowing the gap between the light-emitting units 3 to be designed to be smaller, so as to increase the pixel density.

[0085] Please continue to refer to Figure 8 As shown, in one embodiment, the isolation structure 2 includes a support portion 22 and a crown portion 23. The crown portion 23 is located on the side of the support portion 22 away from the substrate 1. The area of ​​the orthographic projection of the support portion 22 on the substrate 1 is smaller than the area of ​​the orthographic projection of the crown portion 23 on the substrate 1, and the orthographic projection of the support portion 22 on the substrate 1 is located within the orthographic projection of the crown portion 23 on the substrate 1. This creates a T-shaped structure in the isolation structure 2, which effectively blocks the light-emitting functional layer of adjacent light-emitting units 3, thereby reducing the current crosstalk problem between adjacent light-emitting units 3.

[0086] Please refer to Figure 10 As shown, in one embodiment, the display panel 100 further includes a light-emitting functional layer 32 and a second electrode 33. The light-emitting functional layer 32 is disposed within the isolation opening 21 and covers the first electrode 31. The light-emitting functional layer 32 is separated by the isolation structure 2. The second electrode 33 is disposed within the isolation opening 21 and covers the light-emitting functional layer 32. The second electrode 33 overlaps with the isolation structure 2. The first electrode 31, the light-emitting functional layer 32, and the second electrode 33 constitute a light-emitting unit 3.

[0087] The second electrode 33 is connected to the isolation structure 2, so that the isolation structure 2 connects the second electrode 33, thereby making the isolation structure 2 a common electrode for driving.

[0088] Preferably, the first electrode 31 includes an anode, and the second electrode 33 includes a cathode. By configuring different voltages on the first electrode 31 and the second electrode 33, a voltage difference is formed between the first electrode 31 and the second electrode 33, driving the light-emitting functional layer 32 to emit light.

[0089] Please refer to Figure 11 As shown, in one embodiment, the support portion 22 includes a first support portion 221 and a second support portion 222. The first support portion 221 is located between the second support portion 222 and the substrate 1, and the orthographic projection of the second support portion 222 on the substrate 1 is within the orthographic projection of the first support portion 221 on the substrate 1. The second electrode 33 overlaps with the first support portion 221, which helps to improve the overlap effect between the second electrode 33 and the support portion 22.

[0090] In one embodiment, the isolation opening 21 includes a first type of opening, a second type of opening, and a third type of opening. These openings define light-emitting units 3 with different emitted light colors, enhancing the richness of the display on the display panel 100. For example, the light-emitting units 3 of different colors include light-emitting unit R, light-emitting unit B, and light-emitting unit G. Furthermore, the first type of opening, the second type of opening, and the third type of opening can be configured as needed, and their shapes and sizes may differ; no specific limitation is imposed.

[0091] Reference Figure 11 As shown, in one embodiment, the display panel 100 further includes a first encapsulation layer 61, which covers the second electrode 33 and part of the isolation structure 2. The first encapsulation layer 61 protects the isolation structure 2 and the light-emitting unit 3. Further, the first encapsulation layer 61 is an inorganic layer with high density to isolate water and oxygen. Optionally, the first encapsulation layer 61 is formed by full-surface vapor deposition and wet etching.

[0092] Reference Figure 12 As shown, in one embodiment, the display panel 100 further includes a second encapsulation layer 62 and a third encapsulation layer. The second encapsulation layer 62 is disposed on the side of the first encapsulation layer 61 away from the substrate 1, and the third encapsulation layer is disposed on the side of the second encapsulation layer 62 away from the substrate 1. The second encapsulation layer is an organic layer, thus having a larger thickness to planarize the surface of the display panel 100, and the third encapsulation layer is an inorganic layer, achieving an inorganic-organic-inorganic three-layer encapsulation.

[0093] Based on the same inventive concept, and referring to Figure 13As shown, another embodiment of this application discloses a method for manufacturing a display panel, which includes the following steps:

[0094] Step S10: A water vapor barrier structure 5 and a first electrode 31 are formed on one side of the substrate 1; wherein the first electrode 31 includes a metal conductive layer 311, and the water vapor barrier structure 5 at least partially covers the side of the metal conductive layer 311 near the substrate 1 and at least part of the sidewall of the metal conductive layer 311.

[0095] Step S20: A pixel defining layer 4 is formed on the same side of the first electrode 31 opposite to the substrate 1; wherein the pixel defining layer 4 defines a pixel opening 41 exposing the first electrode 31. (Refer to...) Figure 1 As shown.

[0096] The method for fabricating a display panel provided in this embodiment includes a first electrode 31 comprising a metal conductive layer 311 and a moisture barrier structure 5. The moisture barrier structure 5 is at least partially located between the substrate 1 and the metal conductive layer 311 of the first electrode 31. The moisture barrier structure 5 can block moisture from the planarization layer 11 and the pixel defining layer 4, preventing moisture from invading the metal conductive layer 311 from the bottom and sidewalls. This prevents the invading moisture from causing the migration of metal ions in the metal conductive layer 311, thereby preventing the metal ions from penetrating the first electrode 31, avoiding damage and material loss to the upper light-emitting functional layer 32, preventing pixel failure and abnormal light emission of the display panel 100, and improving the display performance of the display panel 100.

[0097] Reference Figure 3 As shown, in one embodiment, the first electrode 31 further includes a first transparent conductive layer 312 and a second transparent conductive layer 313; step S10, forming a moisture barrier structure 5 and the first electrode 31 on one side of the substrate 1, includes:

[0098] A first transparent conductive layer 312, a moisture barrier structure 5, a metal conductive layer 311, and a second transparent conductive layer 313 are sequentially formed on one side of the substrate 1; wherein the moisture barrier structure 5 at least partially covers the sidewall of the second transparent conductive layer 313. This achieves sidewall protection for the second transparent conductive layer 313, improves interfacial adhesion, and enhances the moisture barrier effect.

[0099] Preferably, the second part 52 wraps around the sidewall of the second transparent conductive layer 313 to further enhance the moisture blocking effect.

[0100] Preferably, the second part 52 at least partially covers the sidewall of the first transparent conductive layer 312, thereby protecting the sidewall of the first transparent conductive layer 312, improving the interfacial bonding force, and enhancing the water vapor blocking effect.

[0101] Preferably, the water vapor barrier structure 5 encloses the sidewalls of the first transparent conductive layer 312, the metal conductive layer 311, and the second transparent conductive layer 313, thereby achieving comprehensive protection of the sidewalls of the first electrode 31 and improving the water vapor barrier effect.

[0102] In one embodiment, after step S20, which involves forming the pixel defining layer 4 on the same side of the first electrode 31 opposite to the substrate 1, the following step is further included:

[0103] Step S30: An isolation structure 2 is formed on one side of the pixel defining layer 4 substrate 1; wherein the isolation structure 2 surrounds an isolation opening 21 corresponding to the pixel opening 41. (Refer to...) Figure 4 As shown.

[0104] The isolation structure 2 forms an isolation opening 21 for accommodating the light-emitting unit 3, and adjacent light-emitting units 3 are separated by the isolation structure 2.

[0105] In this process, by setting an isolation structure 2 at the gap between the light-emitting units 3, the functional film layers of adjacent light-emitting units 3 are separated. Thus, in the evaporation process of multiple functional film layers, it is only necessary to perform evaporation on the entire display panel, without using a mask to evaporate the area where the light-emitting units 3 are located to form functional film layers. Therefore, the process of using the isolation structure 2 for evaporation does not need to consider the alignment accuracy problem during evaporation, thereby allowing the gap between the light-emitting units 3 to be designed to be smaller, so as to increase the pixel density.

[0106] In one embodiment, after step S30, forming the isolation structure 2 on one side of the pixel defining layer 4 substrate 1, the following step is further included:

[0107] Step S40: A light-emitting functional layer 32 is formed within the isolation opening 21; wherein the light-emitting functional layer 32 covers the first electrode 31.

[0108] Step S50: A second electrode 33 is formed in the isolation opening 21; wherein the second electrode 33 covers the light-emitting functional layer 32, and the first electrode 31, the light-emitting functional layer 32 and the second electrode 33 constitute the light-emitting unit 3.

[0109] Preferably, the first electrode 31 includes an anode, and the second electrode 33 includes a cathode. By configuring different voltages on the first electrode 31 and the second electrode 33, a voltage difference is formed between the first electrode 31 and the second electrode 33, driving the light-emitting functional layer 32 to emit light.

[0110] The specific structure and materials of the display panel 100 prepared in the display panel preparation method of this embodiment are the same as those in the above-described display panel embodiments, and have the same technical effects as those in the above-described embodiments, so they will not be described again here.

[0111] Another embodiment of this application discloses a display device, which includes the display panel 100 in the above embodiment. The display device can be used on smart devices (such as mobile phones, VR devices, computers, televisions, vehicle displays, etc.).

[0112] In this embodiment, the display panel 100 of the display device includes a first electrode 31 comprising a metal conductive layer 311 and a moisture barrier structure 5. The moisture barrier structure 5 is at least partially located between the substrate 1 and the metal conductive layer 311 of the first electrode 31. The moisture barrier structure 5 can block moisture from the planarization layer 11 and the pixel defining layer 4, preventing moisture from invading the metal conductive layer 311 from the bottom and sidewalls, thereby preventing the migration of metal ions in the metal conductive layer 311 caused by moisture intrusion, and thus preventing the metal ions from penetrating the first electrode 31, avoiding damage and material loss to the upper light-emitting functional layer 32, avoiding pixel failure and abnormal light emission of the display panel 100, improving the display performance of the display panel 100, and improving the performance of the display device.

[0113] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0114] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0115] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: substrate; A first electrode is disposed on one side of the substrate, and the first electrode includes a metal conductive layer; A pixel defining layer is disposed on the same side of the substrate as the first electrode, and the pixel defining layer defines a pixel opening that exposes the first electrode; A moisture-blocking structure that at least partially covers the side of the metal conductive layer near the substrate and at least a portion of the sidewalls of the metal conductive layer.

2. The display panel as described in claim 1, characterized in that, The moisture barrier structure includes a first part and a second part. The first part wraps around the side of the metal conductive layer near the substrate, and the second part wraps around the sidewall of the metal conductive layer.

3. The display panel as described in claim 2, characterized in that, The first electrode further includes a first transparent conductive layer and a second transparent conductive layer. The first transparent conductive layer is located between the metal conductive layer and the substrate, and the second transparent conductive layer is located on the side of the metal conductive layer away from the substrate. The first portion is located between the metal conductive layer and the first transparent conductive layer. Preferably, the second portion at least partially covers the sidewall of the second transparent conductive layer; Preferably, the second portion encloses the sidewall of the second transparent conductive layer; Preferably, the second portion at least partially covers the sidewall of the first transparent conductive layer; Preferably, the water vapor barrier structure encloses the sidewalls of the first transparent conductive layer, the metal conductive layer, and the second transparent conductive layer; Preferably, the material of the metal conductive layer includes Ag, and the materials of the first transparent conductive layer and the second transparent conductive layer include ITO.

4. The display panel as described in claim 1, characterized in that, The display panel also includes: An isolation structure is disposed on the side of the pixel defining layer away from the substrate, and the isolation structure encloses and forms an isolation opening corresponding to the pixel opening.

5. The display panel as described in claim 4, characterized in that, The isolation structure includes a support portion and a crown portion. The crown portion is located on the side of the support portion away from the substrate. The area of ​​the orthographic projection of the support portion on the substrate is smaller than the area of ​​the orthographic projection of the crown portion on the substrate, and the orthographic projection of the support portion on the substrate is located within the orthographic projection of the crown portion on the substrate.

6. The display panel as described in claim 5, characterized in that, The support portion includes a first support portion and a second support portion. The first support portion is located between the second support portion and the substrate. The orthographic projection of the second support portion on the substrate is located within the orthographic projection of the first support portion on the substrate.

7. The display panel as described in claim 4, characterized in that, The display panel also includes: A light-emitting functional layer is disposed within the isolation opening and covers the first electrode, and the light-emitting functional layer is isolated by the isolation structure; The second electrode is disposed within the isolation opening and covers the light-emitting functional layer, and the second electrode overlaps with the isolation structure; The first electrode, the light-emitting functional layer, and the second electrode constitute a light-emitting unit; Preferably, the first electrode includes an anode, and the second electrode includes a cathode.

8. The display panel as described in claim 7, characterized in that, The isolation opening includes a first type of opening, a second type of opening, and a third type of opening, which respectively define the light-emitting units with different emitted light colors.

9. The display panel as described in claim 7, characterized in that, The display panel further includes a first encapsulation layer that covers the second electrode and part of the isolation structure.

10. The display panel as claimed in claim 9, characterized in that, The display panel further includes a second encapsulation layer and a third encapsulation layer, wherein the second encapsulation layer is disposed on the side of the first encapsulation layer away from the substrate, and the third encapsulation layer is disposed on the side of the second encapsulation layer away from the substrate.

11. A method for manufacturing a display panel, characterized in that, include: A moisture barrier structure and a first electrode are formed on one side of a substrate; wherein the first electrode includes a metal conductive layer, and the moisture barrier structure at least partially covers the side of the metal conductive layer near the substrate and at least part of the sidewall of the metal conductive layer. A pixel defining layer is formed on the same side of the first electrode relative to the substrate; wherein the pixel defining layer defines a pixel opening that exposes the first electrode.

12. The method for manufacturing a display panel as described in claim 11, characterized in that, The first electrode further includes a first transparent conductive layer and a second transparent conductive layer; a moisture barrier structure and the first electrode are formed on one side of the substrate, including: A first transparent conductive layer, a moisture barrier structure, a metal conductive layer, and a second transparent conductive layer are sequentially formed on one side of the substrate; wherein the moisture barrier structure at least partially covers the sidewall of the second transparent conductive layer.

13. The method for manufacturing a display panel as described in claim 11, characterized in that, After forming a pixel defining layer on the same side of the first electrode relative to the substrate, the method further includes: An isolation structure is formed on one side of the substrate of the pixel defining layer; wherein the isolation structure surrounds an isolation opening corresponding to the pixel opening.

14. The method for manufacturing a display panel as described in claim 13, characterized in that, After forming an isolation structure on one side of the substrate of the pixel defining layer, the method further includes: A light-emitting functional layer is formed within the isolation opening; wherein the light-emitting functional layer covers the first electrode; A second electrode is formed within the isolation opening; wherein the second electrode covers the light-emitting functional layer, and the first electrode, the light-emitting functional layer, and the second electrode constitute a light-emitting unit.

15. A display device, characterized in that, The display device includes a display panel as described in any one of claims 1-11.

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