Display panel and display device

Abstract

This application discloses a display panel and a display device. The display panel includes a substrate, a pixel definition layer, multiple light-emitting units, and a porous partition structure. The porous partition structure is disposed on the pixel definition layer. Each light-emitting unit includes a light-emitting functional layer and a top electrode. The light-emitting functional layer is disposed below the top electrode, and the light-emitting functional layers of two adjacent light-emitting units are separated by the porous partition structure. The top electrodes of two adjacent light-emitting units are interconnected. The porous partition structure is used to accommodate the light-emitting material located at the position of the porous partition structure during the full-surface deposition of the light-emitting functional layer. By providing the porous partition structure, this application isolates the light-emitting functional layer of the light-emitting unit, preventing the top electrode from being isolated during film deposition and improving the film quality of the top electrode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] In the preparation process of OLED organic light-emitting device, the photo lithography patterning pixel method is usually used, and the preparation of organic light-emitting unit is realized by using the metal mask method. However, the cost of replacing the metal mask is high for different products, so the metal mask-free technology is developed, which has the characteristics of metal mask-free and high precision. By setting a conductive partition structure on the pixel definition layer before the evaporation of the organic light-emitting functional layer and the cathode, the adjacent organic light-emitting functional layers are partitioned, so as to solve the short circuit problem between the adjacent pixels.

[0003] However, the conductive partition structure needs to be fixed in the preparation of the structure with wide upper part and narrow lower part. The partition effect of the overhanging structure also acts on the top electrode, and the top electrode is also easily partitioned by the overhanging structure during film formation. Even if a metal layer is added in the overhanging structure as a connection for the top electrode, there is still a problem of poor connection stability between the metal layer and the top electrode. SUMMARY

[0004] The purpose of the present application is to provide a display panel and a display device, by setting a porous partition structure, the porous partition structure is used to partition the light-emitting functional layer of the light-emitting unit, so as to avoid the partition of the top electrode during film formation, and improve the film formation quality of the top electrode.

[0005] The present application discloses a display panel, which comprises a substrate, a pixel definition layer, a plurality of light-emitting units and a porous partition structure. The pixel definition layer is arranged on the substrate and is provided with a plurality of opening areas. The plurality of light-emitting units are arranged in the plurality of opening areas respectively. The porous partition structure is arranged on the pixel definition layer. The light-emitting unit comprises a light-emitting functional layer and a top electrode. The light-emitting functional layer is arranged below the top electrode. The light-emitting functional layers of two adjacent light-emitting units are partitioned by the porous partition structure. The top electrodes of two adjacent light-emitting units are connected to each other. The porous partition structure is used to accommodate the light-emitting material located at the position of the porous partition structure when the light-emitting functional layer is deposited in whole.

[0006] Optionally, the porous partition structure includes multiple holes, and the display panel further includes a redundant light-emitting functional layer. The redundant light-emitting functional layer is disposed within the holes of the porous partition structure, and adjacent redundant light-emitting functional layers and the light-emitting functional layer are separated by the porous partition structure. The redundant light-emitting functional layer and the light-emitting functional layer are formed using the same process with light-emitting materials. The porous partition structure is used to separate adjacent redundant light-emitting functional layers from the light-emitting functional layer during the full-surface evaporation of the light-emitting material.

[0007] Optionally, the porous partition structure includes a support layer and a porous layer, the porous layer being disposed on the support layer; the redundant light-emitting functional layer being disposed within the porous layer; the thickness of the porous layer being greater than the thickness of the redundant light-emitting functional layer, or the thickness of the porous layer being greater than the thickness of the light-emitting functional layer; and the pore diameter being greater than the radial width of the particles of the light-emitting material.

[0008] Optionally, the top electrode is formed of a top electrode material, and the pore diameter is less than or equal to the radial width of the particles of the top electrode material; the top electrode is located on the porous layer, and the top electrodes of two adjacent light-emitting units extend onto the porous layer and are electrically connected.

[0009] Optionally, the support layer has a top surface, a first side surface, and a second side surface, with the first side surface and the second side surface respectively facing two adjacent opening areas; one side of the top surface is connected to the first side surface, and the other side of the top surface is connected to the second side surface; in the orthographic projection of the substrate, the porous layer overlaps with the top surface of the support layer.

[0010] Optionally, the porous layer is further provided with porous extensions, which are respectively disposed on both sides of the porous layer and extend toward the first side and the second side of the support layer, respectively.

[0011] Optionally, the porous layer includes a first porous portion and a second porous portion, wherein the pore diameter of the first porous portion is larger than the pore diameter of the second porous portion; the second porous portion is disposed on the side of the first porous portion near the opening area.

[0012] Optionally, the radial width of the particles in the luminescent material is less than or equal to 500 nm, the radial width of the particles in the top electrode material is greater than or equal to 1000 nm, and the pore size of the porous layer is between 600 nm and 1000 nm.

[0013] Optionally, the porous layer is formed using a porous aerogel material.

[0014] The application further discloses a display device comprising the display panel and a driving circuit.

[0015] The application uses the containing capacity of the porous partition structure to collect the light emitting material in the region without the light emitting material, that is, the light emitting material in the position of the porous partition structure, so that the light emitting material is not electrically connected with the light emitting functional layer in the opening region. Moreover, the porous partition structure can separate the light emitting functional layer and connect the top electrodes of the two adjacent light emitting units on the porous partition structure, so that the top electrode is not separated during film forming and the film forming quality of the top electrode is improved. The application mainly uses the containing capacity of the porous partition structure to make the light emitting material deposited in the porous partition structure move downward, and the light emitting material in the region without the porous partition structure forms the light emitting functional layer. The light emitting material in the porous partition structure is not connected with the light emitting functional layer, so that the separation effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings included are intended to provide a further understanding of the embodiments of the application and constitute a part of the specification, which serve to explain the principles of the application together with the text. Obviously, the accompanying drawings in the following description only show some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings. In the drawings:

[0017] Figure 1 FIG. 1 is a schematic diagram of a display panel of a first embodiment of the application;

[0018] Figure 2 FIG. 2 is a schematic diagram of a porous partition structure of the application;

[0019] Figure 3 FIG. 3 is a schematic diagram of a first display panel of a second embodiment of the application;

[0020] Figure 4 FIG. 4 is a schematic diagram of a second display panel of the second embodiment of the application;

[0021] Figure 5 FIG. 5 is a schematic diagram of a third display panel of the second embodiment of the application;

[0022] Figure 6 FIG. 6 is a schematic diagram of a display device of the application.

[0023] 100, display panel; 101, substrate substrate; 110, pixel definition layer; 111, opening area; 120, light emitting unit layer; 121, top electrode; 122, light emitting functional layer; 122a, redundant light emitting functional layer; 123, bottom electrode; 130, porous partition structure; 131, support layer; 131a, top surface; 131b, first side surface; 131c, second side surface; 132, porous layer; 1321, porous extension; 1322, first porous portion; 1323, second porous portion; 140, encapsulation layer; 200, display device; 210, driving circuit. DETAILED DESCRIPTION

[0024] It needs to be understood that the terms used herein, the specific structures and functional details disclosed, are only for the purpose of describing specific embodiments, and are representative, but the present application can be embodied in many alternative forms, and should not be interpreted as being limited to the embodiments described herein.

[0025] In the description of the present application, the terms "first", "second" are only for the purpose of description, and should not be understood as indicating relative importance, or implying the number of the indicated technical features. Therefore, unless otherwise specified, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. In addition, the terms indicating the orientation or positional relationship, such as "up", "down", "left", "right", "vertical", "horizontal", etc., are described based on the orientation or relative position relationship shown in the drawings, and are only for the purpose of facilitating the simplified description of the present application, and should not be understood as indicating that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The present application will be described in detail below with reference to the accompanying drawings and optional embodiments.

[0027] Figure 1 is a schematic view of a display panel of the first embodiment of the present application, Figure 2 is a schematic view of a porous partition structure of the present application, see Figures 1 to 2As shown, the display panel 100 includes a substrate 101, a pixel definition layer 110, a plurality of light emitting units and a porous partition structure 130. The pixel definition layer 110 is disposed on the substrate 101 and is provided with a plurality of opening regions 111. The plurality of light emitting units are respectively disposed in the plurality of opening regions 111. The porous partition structure 130 is disposed on the pixel definition layer 110. The light emitting unit includes a light emitting functional layer 122 and a top electrode 121. The light emitting functional layer 122 is disposed below the top electrode 121. The light emitting functional layers 122 of two adjacent light emitting units are partitioned by the porous partition structure 130. The top electrodes 121 of two adjacent light emitting units are connected to each other. The porous partition structure 130 is used to accommodate the light emitting material located at the position of the porous partition structure 130 when the light emitting functional layer 122 is deposited in full.

[0028] The porous partition structure 130 is used to accommodate the light emitting material located at the position of the porous partition structure 130 when the light emitting functional layer 122 is deposited in full. The region without light emitting material is collected, so that the light emitting material is partitioned from the light emitting functional layer 122 in the opening region 111 and is not electrically connected. The porous partition structure 130 can partition the light emitting functional layer 122 and connect the top electrodes 121 of two adjacent light emitting units on the porous partition structure 130, so as to avoid the top electrode 121 from being partitioned during film formation and improve the film formation quality of the top electrode 121. The porous partition structure 130 is mainly used to accommodate the light emitting material located below the porous partition structure 130, so that the light emitting material in the region without the porous partition structure 130 forms the light emitting functional layer 122. The light emitting material in the porous partition structure 130 is not connected to the light emitting functional layer 122, so as to achieve the partitioning effect.

[0029] Specifically, the porous partition structure 130 in the embodiment can be formed of a porous aerogel material, which is a solid material with a nano-porous network structure and can be filled with a gaseous dispersion medium in the pores. The skeleton of the aerogel is composed of three-dimensionally cross-linked nanoparticles, forming a continuous network structure, and the pore size of different aerogel materials is adjustable between 1 nm and 10,000 nm. The porosity of the aerogel is as high as 99.8%, generally more than 90%, and the density is only 2 to 10 times that of air, but the mechanical strength and elasticity can be improved by composite reinforcing materials. The unique nanostructure makes it have extremely low thermal conductivity, close to a vacuum environment, while some materials have high light transmittance (> 90%) and controllable hydrophobicity, adapting to different environmental needs. Aerogels can be classified according to appearance, preparation method, microstructure and matrix chemical composition. Aerogels include single-component aerogels and multi-component aerogels. Single-component aerogels include oxide aerogels, carbide aerogels, nitride aerogels, graphene aerogels, quantum dot aerogels, metal aerogels, polymer-based organic aerogels, biomass-based organic and carbon aerogels, sulfide aerogels, etc. In addition, the types of aerogels also include aldehyde, urea derivatives, polymers and carbon. Aerogels can also be classified into inorganic aerogels, organic aerogels and carbon aerogels according to the skeleton composition.

[0030] Common organic aerogel materials include polymer aerogels (such as aldehyde, urea derivatives, ethylene, etc.) and silicone aerogels. Polymer aerogels are mainly prepared by polymerization of monomers in a polymer solution. Silicone aerogels are prepared by sol-gel method using organic compounds containing silicon bonds as raw materials. Organic aerogels have good softness, plasticity and processability, and are widely used in flexible electronics, catalyst carriers, acoustic materials and other fields. Hybrid aerogels are prepared by mixing organic aerogels and inorganic aerogels.

[0031] Common inorganic aerogel materials such as silica aerogel are a kind of nano-porous material with silica skeleton, which has extremely low density (about 3 kg / m³), ultra-high porosity (porosity > 90%) and ultra-low thermal conductivity 0.01 W / (m*K) to 0.03 W / (m*K), which can be prepared by sol-gel method and supercritical drying technology.

[0032] Aerogel mats, boards, cloths, papers and special-shaped parts are aerogel and fiber composite products. Aerogel mats are aerogel composite materials prepared by using fiber reinforcement to improve the brittleness of aerogel and enhance the mechanical properties. The principle is to use fibers as a supporting framework to support aerogel with nano-porous structure, so that the prepared composite material is more suitable for application in many fields. The simplest method to prepare aerogel mats is to add short fibers (later developed to pre-fiber mat) to the sol before the gel, so that the two can be fully combined to generate a composite material. The fibers used in preparation are divided into two categories: one is organic fiber (polypropylene fiber, carbon fiber, aramid fiber, etc.); the other is inorganic fiber (aluminum silicate fiber, ceramic micro-fiber and glass fiber, etc.). Various studies have shown that the use of fiber reinforcement to prepare aerogel composite materials can enhance the mechanical properties of aerogel, further enhancing the practicality of silica aerogel.

[0033] Specifically, the porous partition structure 130 includes a plurality of holes, and the display panel 100 further includes a redundant light-emitting functional layer 122a disposed in the holes of the porous partition structure 130, and the adjacent redundant light-emitting functional layer 122a and the light-emitting functional layer 122 are separated by the porous partition structure 130.

[0034] The light-emitting functional layer 122 and the top electrode 121 are generally formed by a film deposition process. The film deposition process includes vapor deposition and evaporation process, etc. For example, the light-emitting functional layer 122 is formed by the film deposition process. Generally, the film deposition process needs to convert the light-emitting material into gaseous atoms or molecules, and then deposit the gaseous atoms or molecules on the substrate surface to form a thin film. The evaporation process is to heat the light-emitting material to a vaporization temperature by an evaporation source, so that the light-emitting material is converted into a gaseous state, and then the gaseous particles are deposited on the substrate by electron beam evaporation or laser evaporation to form a film layer. In the present application, the pore size of the hole of the porous partition structure 130 is set to be able to pass the gaseous particles, so as to realize the accommodation of the light-emitting material.

[0035] In the present embodiment, the light-emitting functional layer 122 can be formed by a maskless evaporation technology. The maskless evaporation technology is to realize the patterning process of the light-emitting functional layer 122 without using a metal mask plate in the process of forming the light-emitting functional layer 122.

[0036] The redundant light-emitting functional layer 122a and the light-emitting functional layer 122 are formed by the same process using the light-emitting material. In the process of forming the light-emitting functional layer 122, the redundant light-emitting functional layer 122a inside the porous partition structure 130 and the light-emitting functional layer 122 are formed synchronously, and only the light-emitting functional layer 122 participates in the display of the light-emitting unit, while the redundant light-emitting functional layer 122a, which is the light-emitting material inside the porous partition structure 130, has no actual function.

[0037] Specifically, the pore diameter of the holes of the porous partition structure 130 is greater than the radial width of the particles of the light emitting material. The pore diameter of the holes is less than or equal to the radial width of the particles of the material of the top electrode 121.

[0038] In this embodiment, when the light emitting material is deposited in a full surface, the porous partition structure 130 is used to absorb and contain the light emitting material deposited on the porous partition structure 130 by the holes, so as to realize that the porous partition structure 130 is used to partition the adjacent redundant light emitting functional layer 122a and the light emitting functional layer 122 when the light emitting material is deposited in a full surface. When the top electrode 121 is formed, because the radial width of the particles of the material of the top electrode 121 is greater than the pore diameter of the holes, the material of the top electrode 121 cannot pass through the holes, and a surface layer of the porous partition structure 130 is formed, so as to realize that the porous partition structure 130 is used to not partition the top electrodes 121 of the adjacent two light emitting units when the material of the top electrode 121 is deposited in a full surface, so that the top electrodes 121 of the adjacent two light emitting units are connected to each other. It can be understood that the radial width of the particles in this embodiment refers to the radial width of the gaseous particles in the film deposition process. The porous aerogel of the present application has an insulating effect, and when the light emitting material is contained in the porous aerogel, the insulating property of the porous aerogel can be improved by reducing the edge porosity to improve the insulating ability.

[0039] In this embodiment, the thickness of the porous partition structure 130 is greater than the thickness of the light emitting functional layer 122, and is greater than the thickness of the top electrode 121.

[0040] In order to further ensure that the redundant light emitting functional layer 122a and the light emitting functional layer 122 are not connected, the thickness of the porous partition structure 130 can be thickened, so that the redundant light emitting functional layer 122a is located at the bottom of the porous partition structure 130, and the light emitting material in the porous partition structure 130 is relatively dispersed, which will not cause the crosstalk problem of the adjacent two light emitting units, that is, one light emitting unit emits light, and the adjacent light emitting unit is mistakenly triggered to emit light.

[0041] In this embodiment, the side surface of the porous partition structure 130 can be covered by an insulating layer, so that the light emitting material only enters from the top surface 131a of the porous partition structure 130, so as to realize that the top surface 131a of the porous partition structure 130 is free of residual light emitting material. Because of the setting of the insulating layer, the light emitting material is deposited and forms the light emitting functional layer 122, which is insulatively arranged with the redundant light emitting functional layer 122a.

[0042] Specifically, the display panel 100 further comprises an encapsulation layer 140, which realizes the function of isolating water and oxygen by using a laminated structure of two or more layers of inorganic encapsulation layer 140 and organic encapsulation layer 140 through thin film encapsulation technology. Wherein, the encapsulation layer 140 covers the top electrode 121 of the light emitting unit, and since the porous partition structure 130 does not need to be formed as a conductive partition structure as in the exemplary technology, it is formed in a structure of wide at the top and narrow at the bottom. In the process of forming the organic encapsulation layer 140 by inkjet printing, no air holes will be formed on the side of the conductive partition structure.

[0043] The light emitting unit of the embodiment is generally an organic light emitting unit, that is, the light emitting functional layer 122 is formed by using organic light emitting material, and a bottom electrode 123 is further provided under the light emitting functional layer 122, which drives the light emitting functional layer 122 to emit light together with the top electrode 121.

[0044] Wherein, the light emitting functional layer 122 generally further comprises a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer, etc. In the process of forming the light emitting functional layer 122, the above-mentioned multi-layer film layers need to be deposited in sequence to form corresponding film layers, and in this process, through the holes of the porous partition structure 130, the corresponding hole injection layer material, hole transport layer material, light emitting layer material, electron transport layer material and electron injection layer material enter into the holes to form a redundant light emitting functional layer 122, and is respectively separated from the hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer provided in the opening area 111, thereby forming the patterned film layers of the light emitting functional layer 122.

[0045] Figure 3 is a schematic view of a first display panel of a second embodiment of the present application, referring to Figure 3 The present application further discloses a display panel 100, which comprises a substrate 101, a pixel definition layer 110, a plurality of light emitting units, a porous partition structure 130 and an encapsulation layer 140. The substrate 101, the pixel definition layer 110, the light emitting unit and the encapsulation layer 140 are the same as those of the first embodiment, and will not be described here.

[0046] Specifically, the porous partition structure 130 comprises a support layer 131 and a porous layer 132, the porous layer 132 is arranged on the support layer 131, and the redundant light emitting functional layer 122a is arranged in the porous layer 132. Wherein, the width of the support layer 131 and the porous layer 132 is limited, and does not need to be formed in a structure of wide at the top and narrow at the bottom as in the exemplary technology.

[0047] In the embodiment, the porous partition structure 130 has poor support, and the combination of the support layer 131 and the porous layer 132 is used to accommodate the redundant light-emitting functional layer 122a, and the support layer 131 can be used to support the porous layer 132. Through the cooperation of the two, the light-emitting functional layer 122 is partitioned. It can be understood that the porous layer 132 of the embodiment can be formed by using the porous aerogel material as described above, and the solutions in the first embodiment can be applied to the embodiment.

[0048] Specifically, the top electrode 121 is formed by using a top electrode 121 material, the pore size of the hole is less than or equal to the particle radial width of the top electrode 121 material; the top electrode 121 is located on the porous layer 132, and the top electrodes 121 of two adjacent light-emitting units extend to the porous layer 132 and are electrically connected.

[0049] Among them, the particle radial width of the light-emitting material is less than or equal to 500nm, the particle radial width of the top electrode 121 material is greater than or equal to 1000nm, and the pore size of the hole of the porous layer 132 is between 600nm and 1000nm.

[0050] In the embodiment, the particle radial width of the top electrode 121 material is greater than or equal to the pore size of the hole, so that when the top electrode 121 material is deposited, the top electrode 121 material above the porous layer 132 will not enter the hole, thereby forming a top electrode 121 material layer on the surface of the porous layer 132, and the top electrode 121 material layer is connected with the top electrodes 121 of two adjacent light-emitting units to form a whole top electrode 121. Among them, when the pore size of the hole is equal to the particle radial width of the top electrode 121 material, because the arrangement of the hole is disordered, when there are more particles of the top electrode 121 material, it will still be formed on the porous layer 132, thereby forming the top electrode 121.

[0051] Of course, the embodiment can also increase the thickness of the top electrode 121 to make the electrical connection of the top electrode 121 on the porous layer 132 better. For example, when the thickness of the light-emitting functional layer 122 is about 100nm, and the thickness of the top electrode 121 is usually about 300nm, the thickness of the top electrode 121 can be increased to more than 400nm to ensure the electrical requirements of the top electrode 121.

[0052] The light-emitting functional layer 122 includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer. The pore diameters of the hole injection layer material particles, the hole transport layer material particles, the light-emitting layer material particles, the electron transport layer material particles, and the electron injection layer material particles are all less than 500 nm. In a specific embodiment, the pore diameters of the above-mentioned particles can be gradually increased in the order of the process sequence. For example, the radial width of the hole injection layer particles formed first is 300 nm, the radial width of the hole transport layer particles formed subsequently is 330 nm, and the radial width is gradually increased by an interval of 30 nm. By setting the radial width of the particles according to the sequence of the film layers, the light-emitting material particles formed first can enter the bottom of the porous layer 132 as much as possible, so that the light-emitting material particles are not all accumulated in the upper part of the porous layer 132, and the particles of the subsequent film layers cannot enter. Of course, the above-mentioned embodiment is only taken as an example of the normal arrangement of the light-emitting functional layer 122, and is also applicable to the inverted arrangement of the light-emitting functional layer 122. When the light-emitting functional layer 122 is inverted, it includes an electron injection layer, an electron transport layer, a light-emitting layer, a hole transport layer, and a hole injection layer arranged in sequence.

[0053] Specifically, the thickness of the porous layer 132 is greater than the thickness of the redundant light-emitting functional layer 122a, or the thickness of the porous layer 132 is greater than the thickness of the light-emitting functional layer 122. For example, when the thickness of the light-emitting functional layer 122 is about 100 nm, and considering that the pore filling rate of the aerogel material is about 80%, the thickness of the porous layer 132 can be set to be greater than 400 nm.

[0054] Specifically, the support layer 131 has a top surface 131a, a first side surface 131b, and a second side surface 131c. The first side surface 131b and the second side surface 131c are respectively arranged towards two adjacent opening regions 111. One side of the top surface 131a is connected to the first side surface 131b, and the other side of the top surface 131a is connected to the second side surface 131c. In the orthographic projection of the substrate 101, the porous layer 132 overlaps the top surface 131a of the support layer 131.

[0055] In the present embodiment, the cross-sectional view of the support layer 131 along the line between the two adjacent light-emitting units is a trapezoid, the first side surface 131b and the second side surface 131c are respectively the waist of the trapezoid, and the top surface 131a is the top surface of the trapezoid. In the present embodiment, the porous layer 132 is only arranged on the top surface 131a of the support layer 131, so that only the light-emitting material on the top surface 131a of the support layer 131 enters the pores, and the light-emitting functional layer 122 formed on the first side surface 131b and the second side surface 131c of the support layer 131 does not participate in display.

[0056] Figure 4is a schematic view of a second display panel of the second embodiment of the present application, referring to Figure 4 In the embodiment, the support layer 131 has a top surface 131a, a first side surface 131b and a second side surface 131c, the first side surface 131b and the second side surface 131c are respectively arranged towards two adjacent opening regions 111; one side of the top surface 131a is connected to the first side surface 131b, and the other side of the top surface 131a is connected to the second side surface 131c; the porous layer 132 further has a porous extension 1321 arranged on both sides of the porous layer 132 and extending towards the first side surface 131b of the support layer 131 and the second side surface 131c of the support layer 131 respectively. On the orthographic projection of the substrate 101, the porous extension 1321 overlaps with the first side surface 131b or the second side surface 131c of the support layer 131. The porous layer 132 and the porous extension 1321 are connected and have the same material.

[0057] The present solution extends the porous layer 132 to the first side surface 131b and the second side surface 131c of the support layer 131, so that the porous layer 132 has sufficient partition area on the support layer 131, thereby arranging the porous layer 132 surrounding the support layer 131 in multiple surfaces.

[0058] Specifically, the light emitting unit further includes a bottom electrode 123 arranged below the light emitting functional layer 122, and the bottom electrode 123 is generally formed before the pixel definition layer 110 is formed. However, in order to avoid the electrically conductive light emitting material contained in the porous extension 1321 from being electrically connected to the bottom electrode 123, a gap can be arranged between the porous extension 1321 and the bottom electrode 123 in the embodiment.

[0059] Figure 5 is a schematic view of a third display panel of the second embodiment of the present application, referring to Figure 5 In another embodiment, the porous layer 132 includes a first porous portion 1322 and a second porous portion 1323, and the pore size of the first porous portion 1322 is larger than the pore size of the second porous portion 1323.

[0060] In the embodiment, the pore sizes of the pores at different positions of the porous layer 132 are arranged, so that better blocking effect is achieved. For example, the second porous portion 1323 is arranged on one side of the first porous portion 1322 close to the opening region 111. Therefore, the pores with small pore size are located in the middle part away from the two adjacent opening regions 111.

[0061] In the present solution, the porous part with two different hole diameters is provided, and the second porous part 1323 with smaller hole diameter is located at the middle position of the porous partition structure 130, and the first porous part 1322 with larger hole diameter is located at the edge position of the porous partition structure 130. On the one hand, the light-emitting functional layer 122 can be completely accommodated by the first porous part 1322, so that the light-emitting material cannot form a continuous film layer on the porous partition structure 130. On the other hand, by providing the second porous part 1323 with smaller hole diameter, the film forming effect of the top electrode 121 on the second porous part 1323 is better.

[0062] In an embodiment, the hole diameter of the second porous part 1323 can be smaller than the radial width of the light-emitting material particles.

[0063] The radial width of the light-emitting material particles is less than or equal to 500 nm, the radial width of the top electrode 121 material particles is greater than or equal to 1000 nm, the hole diameter of the first porous part 1322 is between 600 nm and 1000 nm, and the hole diameter of the second porous part 1323 can be less than 500 nm.

[0064] The light-emitting functional layer 122 includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer. The hole diameter of the hole injection layer material particles, the hole transport layer material particles, the light-emitting layer material particles, the electron transport layer material particles, and the electron injection layer material particles is limited to less than 500 nm, and the hole diameter of the above-mentioned particles is gradually increased in the process sequence. For example, the radial width of the particles of the first formed hole injection layer is 300 nm, the radial width of the particles of the subsequent hole transport layer is 330 nm, and the radial width of the particles of the subsequent hole transport layer is gradually increased by an interval of 30 nm. The hole diameter of the second porous part 1323 can be greater than or equal to the radial width of the particles of the hole injection layer, that is, greater than or equal to the radial width of the light-emitting material particles with the smallest size in each film layer of the light-emitting functional layer 122.

[0065] Of course, the first porous part 1322 and the second porous part 1323 in the present embodiment can also be provided at the position of the porous extension part 1321, so that the film layer of the top electrode 121 at this position has better film forming quality.

[0066] Figure 6 is a schematic view of the display device of the present application, as shown in Figure 6 The display device 200 includes a driving circuit 210 and a display panel 100, which can be any of the display panels 100 described above, wherein the driving circuit 210 is used to drive the display panel 100 to display.

[0067] It should be noted that the inventive concept of the present application can form very many embodiments, but the length of the application file is limited and cannot list them one by one, so the above described embodiments or technical features can be combined to form new embodiments without conflict, and the combination of each embodiment or technical feature will enhance the original technical effect.

[0068] The above is a further detailed description of the present application in combination with specific optional embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection scope of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a pixel definition layer disposed on the substrate and provided with a plurality of opening regions; a plurality of light emitting units respectively disposed in the plurality of opening regions; and a porous partition structure disposed on the pixel definition layer; wherein the light emitting unit comprises a light emitting functional layer and a top electrode, the light emitting functional layer is disposed below the top electrode, the light emitting functional layers of two adjacent light emitting units are separated by the porous partition structure, and the top electrodes of two adjacent light emitting units are connected to each other; the porous partition structure is used to accommodate the light emitting material located at the position of the porous partition structure when the light emitting functional layer is deposited in full; the porous partition structure comprises a plurality of pores, the pore diameter of the pores of the porous partition structure is greater than the particle radial width of the light emitting material, and the pore diameter of the pores is less than or equal to the particle radial width of the top electrode material. The display panel further comprises a redundant light emitting functional layer, the redundant light emitting functional layer is disposed in the pores of the porous partition structure, and the adjacent redundant light emitting functional layer and the light emitting functional layer are separated by the porous partition structure; 2. The display panel of claim 1, wherein, wherein the redundant light emitting functional layer and the light emitting functional layer are formed by the same process using light emitting material; the porous partition structure is used to separate the adjacent redundant light emitting functional layer and the light emitting functional layer when the light emitting material is evaporated in full. The porous partition structure comprises a support layer and a porous layer, and the porous layer is disposed on the support layer; 3. The display panel of claim 2, wherein, the redundant light emitting functional layer is disposed in the porous layer; the thickness of the porous layer is greater than the thickness of the redundant light emitting functional layer, or the thickness of the porous layer is greater than the thickness of the light emitting functional layer; the pore diameter of the pores is greater than the particle radial width of the light emitting material. The top electrode is formed of a top electrode material, and the pore diameter of the pores is less than or equal to the particle radial width of the top electrode material; 4. The display panel of claim 3, wherein, the top electrode is located on the porous layer, and the top electrodes of two adjacent light emitting units extend to the porous layer and are electrically connected. The support layer has a top surface, a first side surface and a second side surface, the first side surface and the second side surface are respectively arranged towards two adjacent opening regions, one side of the top surface is connected to the first side surface, and the other side of the top surface is connected to the second side surface; 5. The display panel of claim 3, wherein, on the orthographic projection of the substrate, the porous layer and the top surface of the support layer overlap. The porous layer further comprises a porous extension, and the porous extension is respectively arranged on both sides of the porous layer and extends towards the first side surface of the support layer and the second side surface of the support layer.

6. The display panel of claim 5, wherein, The porous layer comprises a first porous part and a second porous part, the pore diameter of the pores of the first porous part is greater than the pore diameter of the pores of the second porous part; 7. The display panel of claim 3, wherein, the second porous part is arranged on one side of the first porous part close to the opening region. The particle radial width of the light emitting material is less than or equal to 500 nm, the particle radial width of the top electrode material is greater than or equal to 1000 nm, and the pore diameter of the pores of the porous layer is between 600 nm and 1000 nm.

8. The display panel of claim 4, wherein, The porous layer is formed of a porous aerogel material.

9. The display panel of claim 3, wherein, ​ 10. A display device, characterized by comprising: The display panel according to any one of claims 1-9, comprising a driving circuit, wherein the driving circuit is configured to drive the display panel to display.

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