Display panel and display device

Abstract

The invention discloses a display panel and a display device, the display panel comprises a substrate, a pixel definition layer, a plurality of light emitting units and a porous partition structure, and the porous partition structure is arranged on the pixel definition layer; wherein the light-emitting unit comprises a light-emitting functional layer and a top electrode; the light-emitting functional layers are arranged below the top electrodes, the light-emitting functional layers of every two adjacent light-emitting units are separated through the porous separation structures, and the top electrodes of every two adjacent light-emitting units are connected with each other. And the porous partition structure is used for accommodating a luminescent material located at the position of the porous partition structure when the whole surface of the luminescent functional layer is deposited. By arranging the porous partition structure, the light-emitting functional layer of the light-emitting unit is partitioned by using the porous partition structure, so that the top electrode is prevented from being partitioned during film forming, and the film forming quality of the top electrode is improved.

Description

Technical Field

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

[0002] In the fabrication process of OLEDs, photolithography is typically used to pattern pixels, using metal masks to create the organic light-emitting units. However, the cost of changing metal masks for different products is high, leading to the emergence of metal-mask-free technology, which offers high precision without a metal mask. By providing a conductive barrier structure on the pixel definition layer before evaporating the organic light-emitting functional layer and cathode, adjacent organic light-emitting functional layers are isolated, thus resolving the short-circuiting problem of the organic light-emitting functional layers between adjacent pixels.

[0003] However, the current conductive partition structure requires a fixed structure that is wide at the top and narrow at the bottom during preparation. The partitioning effect of the overhanging structure will also act on the top electrode, and there is a problem that the top electrode is easily isolated by the overhanging structure during film formation. Moreover, even if a metal layer is added to the overhanging structure as a way to connect the top electrode, there is still a problem of poor connection stability between the metal layer and the top electrode. Summary of the Invention

[0004] The purpose of this application is to provide a display panel and a display device, which sets a porous partition structure and uses the porous partition structure to isolate the light-emitting functional layer of the light-emitting unit, thereby preventing the top electrode from being isolated during film formation and improving the film formation quality of the top electrode.

[0005] The present application discloses a display panel, comprising a base substrate, a pixel definition layer, a plurality of light-emitting units, and a porous partition structure. The pixel definition layer is disposed on the base substrate and is provided with a plurality of opening regions; the plurality of light-emitting units are respectively disposed within the plurality of opening regions; the porous partition structure is disposed on the pixel definition layer; wherein the light-emitting units include 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 the 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 when the light-emitting functional layer is deposited on the entire surface.

[0006] Optionally, the porous partition structure includes a plurality of holes, and the display panel further includes a redundant light-emitting functional layer, wherein the redundant light-emitting functional layer is arranged in the holes of the porous partition structure, and adjacent redundant light-emitting functional layers and the light-emitting functional layers are separated by the porous partition structure; wherein the redundant light-emitting functional layer and the light-emitting functional layer are formed by the same process using light-emitting materials; 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 on the entire surface.

[0007] Optionally, the porous partition structure includes a supporting layer and a porous layer, the porous layer is arranged on the supporting layer; the redundant luminescent functional layer is arranged in the porous layer; the thickness of the porous layer is greater than the thickness of the redundant luminescent functional layer, or the thickness of the porous layer is greater than the thickness of the luminescent functional layer; the aperture of the hole is greater than the radial width of the particles of the luminescent material.

[0008] Optionally, the top electrode is formed of a top electrode material, and the aperture of the hole 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 supporting layer has a top surface, a first side surface and a second side surface, and the first side surface and the second side surface are respectively arranged towards 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; on the orthographic projection of the base substrate, the porous layer overlaps with the top surface of the supporting layer.

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

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

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

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

[0014] The present application also discloses a display device, comprising a driving circuit and the above-mentioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] The present application sets up a porous partition structure and utilizes the pores of the porous partition structure to have a holding capacity, so that when the light-emitting functional layer is deposited on the entire surface using the light-emitting material, the area where the light-emitting material is not needed, that is, the light-emitting material located at the position of the porous partition structure is collected, so that this part of the light-emitting material is separated from the light-emitting functional layer located in the opening area and is not electrically connected. Moreover, the porous partition structure can not only isolate the light-emitting functional layer, but also connect the top electrodes of the two adjacent light-emitting units to each other on the porous partition structure, thereby avoiding the top electrode from being isolated during film formation and improving the film formation quality of the top electrode. The present application mainly utilizes the holding capacity of the porous partition structure, so that the light-emitting material deposited on the porous partition structure moves downward, and in the area where the porous partition structure is not provided, the light-emitting material forms a light-emitting functional layer, and the light-emitting material located in the porous partition structure is not connected to the light-emitting functional layer, thereby achieving a partition effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings: Figure 1 is a schematic diagram of a display panel according to a first embodiment of the present application; Figure 2 is a schematic diagram of the porous partition structure of the present application; Figure 3 is a schematic diagram of a first display panel according to a second embodiment of the present application; Figure 4 is a schematic diagram of a second display panel according to a second embodiment of the present application; Figure 5 is a schematic diagram of a third display panel according to the second embodiment of the present application; Figure 6 is a schematic diagram of a display device of the present application.

[0017] Among them, 100, display panel; 101, base 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, supporting layer; 131a, top surface; 131b, first side surface; 131c, second side surface; 132, porous layer; 1321, porous extension portion; 1322, first porous portion; 1323, second porous portion; 140, encapsulation layer; 200, display device; 210, driving circuit. DETAILED DESCRIPTION

[0018] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative. However, the present application can be implemented in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of such features; "multiple" means two or more. In addition, terms indicating orientation or positional relationships such as "upper", "lower", "left", "right", "vertical", and "horizontal" are described based on the orientation or relative positional relationships shown in the accompanying drawings. They are only simplified descriptions for the convenience of describing this application, and do not indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0020] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0021] Figure 1 is a schematic diagram of a display panel according to the first embodiment of the present application, Figure 2 This is a schematic diagram of the porous partition structure of the present application, see Figures 1 to 2As shown, the present application discloses a display panel 100 including a base 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 base substrate 101 and is provided with a plurality of opening areas 111; the plurality of light-emitting units are respectively disposed within the plurality of opening areas 111; the porous partition structure 130 is disposed on the pixel definition layer 110; wherein the light-emitting units include 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 separated by the porous partition structure 130, and 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 on the entire surface.

[0022] This application provides a porous partition structure 130, utilizing the porous storage capacity of the porous partition structure 130. This allows the area where no luminescent material is needed, that is, the luminescent material located at the porous partition structure 130, to be collected when the luminescent functional layer 122 is deposited on its entire surface. This separates this portion of luminescent material from the luminescent functional layer 122 located within the opening 111, preventing electrical connection. Furthermore, the porous partition structure 130 not only isolates the luminescent functional layer 122 but also allows the top electrodes 121 of two adjacent luminescent units to be connected to each other on the porous partition structure 130, preventing the top electrodes 121 from being isolated during film formation and improving the film formation quality of the top electrodes 121. The present application mainly utilizes the accommodation capacity of the porous partition structure 130 so that the luminescent material deposited on the porous partition structure 130 moves downward. In the area where the porous partition structure 130 is not provided, the luminescent material forms a luminescent functional layer 122. The luminescent material located in the porous partition structure 130 is not connected to the luminescent functional layer 122, thereby achieving a partition effect.

[0023] Specifically, the porous partition structure 130 in this embodiment can be formed using porous aerogel material. Porous aerogel is a solid material with a nanoporous network structure, whose pores can be filled with a gaseous dispersion medium. The aerogel's skeleton is composed of three-dimensionally cross-linked nanoparticles, forming a continuous network. The pore size of different aerogel materials can be adjusted between 1 nm and 10,000 nm. Its porosity can reach up to 99.8%, typically exceeding 90%. Its density is only 2 to 10 times that of air, but its mechanical strength and elasticity can be enhanced by composite reinforcements. Its unique nanostructure enables extremely low thermal conductivity, nearing a vacuum environment. Some materials also possess high light transmittance (transmittance > 90%) and controllable hydrophobicity, adapting to different environmental requirements. Aerogels can be categorized based on 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, and sulfide aerogels. Aerogels also include aldehyde-based, urea-based, polymer-based, and carbon-based aerogels. Aerogels can also be categorized based on their skeleton composition into inorganic, organic, and carbon aerogels.

[0024] Common organic aerogel materials include polymer aerogels (such as aldehydes, urea derivatives, and vinyl) and organosilicon aerogels. Polymer aerogels are primarily produced through polymerization of monomers in a polymer solution. Organosilicon aerogels, on the other hand, are produced using a sol-gel method using organic compounds containing silicon bonds. Organic aerogels exhibit excellent softness, plasticity, and processability, and are widely used in flexible electronics, catalyst supports, acoustic materials, and other fields. Hybrid aerogels are aerogels prepared by mixing organic and inorganic aerogels.

[0025] Common inorganic aerogel materials such as silica aerogel are nanoporous materials with silica as the skeleton. They have extremely low density (about 3kg / m³), ultra-high porosity (porosity > 90%) and ultra-low thermal conductivity of 0.01W / (m*K) to 0.03W / (m*K). They can be prepared by the sol-gel method and supercritical drying technology.

[0026] Aerogel mats, sheets, cloths, paper, and custom-shaped parts are made by combining aerogel with fibers in the corresponding product form. For example, aerogel mats are aerogel composites made using fiber reinforcement to improve aerogel brittleness and enhance mechanical properties. The principle is to use fibers as a supporting framework for the nanoporous aerogel, making the resulting composite more suitable for a wide range of applications. The simplest method for making aerogel mats is to add short fibers (later developed into prefabricated fiber mats) to the sol before gelation, allowing the two fibers to fully bond to form a composite material. The fibers used in this preparation fall into two major categories: organic fibers (such as polypropylene, carbon fibers, and aramid fibers) and inorganic fibers (such as aluminum silicate fibers, ceramic microfibers, and glass fibers). Various studies have shown that using fiber reinforcement to prepare aerogel composites can enhance the mechanical properties of aerogels, further increasing the practicality of silica aerogels.

[0027] Specifically, the porous partition structure 130 includes multiple holes, and the display panel 100 also includes a redundant light-emitting functional layer 122a, which is arranged in the holes of the porous partition structure 130, and the adjacent redundant light-emitting functional layers 122a are separated from the light-emitting functional layer 122 by the porous partition structure 130.

[0028] Among them, the light-emitting functional layer 122 and the top electrode 121 are usually formed by a film deposition process, and the film deposition methods include vapor deposition and evaporation process. Taking the light-emitting functional layer 122 as an example, this type of film deposition method generally requires converting the light-emitting material into gaseous atoms or molecules, and forming a thin film by migration and deposition on the surface of the substrate. The evaporation process uses an evaporation source for heating, so that the light-emitting material is heated to the evaporation temperature and converted into a gaseous state, and the gaseous particles are deposited on the substrate to form a film layer by electron beam evaporation or laser evaporation. The present application sets the aperture of the holes of the porous partition structure 130 so that the above-mentioned gaseous particles can pass through the holes, thereby achieving the accommodation of the light-emitting material.

[0029] In this embodiment, the light-emitting functional layer 122 can be formed by using a maskless evaporation technique. The maskless evaporation technique means that during the process of forming the light-emitting functional layer 122 , a patterning process of the light-emitting functional layer 122 can be achieved without using a metal mask.

[0030] The redundant light-emitting functional layer 122a is formed using the same luminescent material as the light-emitting functional layer 122 through the same manufacturing process. During the formation of the light-emitting functional layer 122, the redundant light-emitting functional layer 122a located within the porous partition structure 130 is formed simultaneously with the light-emitting functional layer 122. Only the light-emitting functional layer 122 contributes to the display of the light-emitting unit, while the redundant light-emitting functional layer 122a, i.e., the light-emitting material located within the porous partition structure 130, has no actual function.

[0031] Specifically, the diameter of the holes of the porous partition structure 130 is larger than the radial width of the particles of the light-emitting material, and is smaller than or equal to the radial width of the particles of the material of the top electrode 121 .

[0032] In this embodiment, when the luminescent material is deposited on the entire surface, the pores are used to absorb and accommodate the luminescent material deposited on the porous partition structure 130, so that the porous partition structure 130 is used to separate the adjacent redundant luminescent functional layer 122a from the luminescent functional layer 122 when the luminescent material is evaporated on the entire surface. When forming the top electrode 121, because the radial width of the particles of the top electrode 121 material is greater than the aperture of the pores, the top electrode 121 material cannot pass through the pores, and forms the surface layer of the porous partition structure 130, so that the porous partition structure 130 is used to not separate the top electrodes 121 of two adjacent light-emitting units when the top electrode 121 material is evaporated on the entire surface, so that the top electrodes 121 of the two adjacent 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. When the luminescent material is contained in the porous aerogel, the insulating properties of the porous aerogel can be improved by reducing the pores at the edge to improve the insulating capacity.

[0033] In this embodiment, the thickness of the porous partition structure 130 is greater than the thickness of the light-emitting functional layer 122 , and greater than the thickness of the top electrode 121 .

[0034] In order to further ensure that the redundant light-emitting functional layer 122a is not connected to the light-emitting functional layer 122, 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, and will not cause crosstalk problems between two adjacent light-emitting units. The crosstalk problem is that when one light-emitting unit emits light, the adjacent light-emitting unit will be mistakenly triggered.

[0035] In this embodiment, the side surfaces of the porous partition structure 130 can be covered with an insulating layer, so that the luminescent material enters only from the top surface 131a of the porous partition structure 130, thereby achieving no luminescent material residue on the top surface 131a of the porous partition structure 130. Due to the provision of the insulating layer, the luminescent material is deposited on the side surfaces of the porous partition structure 130 to form the luminescent functional layer 122, which is insulated from the redundant luminescent functional layer 122a.

[0036] Specifically, the display panel 100 also includes an encapsulation layer 140, which utilizes thin-film encapsulation technology. This layer is constructed by stacking two or more inorganic and organic encapsulation layers 140 to isolate water and oxygen. The encapsulation layer 140 covers the top electrode 121 of the light-emitting unit. Because the porous partition structure 130 does not need to be wide at the top and narrow at the bottom, as in the exemplary embodiment, the organic encapsulation layer 140 is formed by inkjet printing, eliminating the formation of pores on the sides of the conductive partition structure.

[0037] The light-emitting unit of this embodiment is generally an organic light-emitting unit, that is, the light-emitting functional layer 122 is formed of an organic light-emitting material, and a bottom electrode 123 is further provided under the light-emitting functional layer 122. The bottom electrode 123 and the top electrode 121 jointly drive the light-emitting functional layer 122 to emit light.

[0038] The light-emitting functional layer 122 generally includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer. When forming the light-emitting functional layer 122, the above-mentioned multiple film layers need to be deposited in sequence to form corresponding film layers. During this process, the corresponding hole injection layer material, hole transport layer material, light-emitting layer material, electron transport layer material, and electron injection layer material enter the holes of the porous partition structure 130, forming a redundant light-emitting functional layer 122. The redundant light-emitting functional layer 122 is 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.

[0039] Figure 3 is a schematic diagram of the first display panel of the second embodiment of the present application, see Figure 3 As shown, the present application also discloses a display panel 100, which includes a base substrate 101, a pixel definition layer 110, a plurality of light-emitting units, a porous partition structure 130 and an encapsulation layer 140, wherein the base substrate 101, the pixel definition layer 110, the light-emitting units and the encapsulation layer 140 are the same as those in the first embodiment described above and will not be described in detail here.

[0040] Specifically, the porous partition structure 130 includes a support layer 131 and a porous layer 132. The porous layer 132 is disposed on the support layer 131; the redundant light-emitting functional layer 122a is disposed within the porous layer 132. The widths of the support layer 131 and the porous layer 132 are limited, and do not need to be formed in a structure that is wide at the top and narrow at the bottom, as in the exemplary conductive partition structure.

[0041] In this embodiment, considering the poor support of the porous partition structure 130, a combination of a support layer 131 and a porous layer 132 is provided. 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 isolated. It is understood that the porous layer 132 of this embodiment can be formed of the porous aerogel material described above, and the solutions in the first embodiment can all be applied to this embodiment.

[0042] Specifically, the top electrode 121 is formed of a top electrode 121 material, and the aperture of the hole is less than or equal to the radial width of the particles 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.

[0043] The radial width of the particles of the light-emitting material is less than or equal to 500 nm, the radial width of the particles of the material of the top electrode 121 is greater than or equal to 1000 nm, and the pore diameter of the holes of the porous layer 132 is between 600 nm and 1000 nm.

[0044] In this embodiment, the radial width of the particles of the top electrode 121 material is greater than or equal to the aperture of the holes, so that when the top electrode 121 material is deposited, the top electrode 121 material located above the porous layer 132 does not enter the holes, thereby forming a top electrode 121 material layer on the surface of the porous layer 132. This top electrode 121 material layer is connected to the top electrodes 121 of two adjacent light-emitting units to form the entire top electrode 121. When the aperture is equal to the radial width of the particles of the top electrode 121 material, since the arrangement of the holes is disordered, even if there are a large number of particles of the top electrode 121 material, they will still be formed on the porous layer 132, thereby forming the top electrode 121.

[0045] Of course, in this embodiment, the electrical connection of the top electrode 121 on the porous layer 132 can also be improved by increasing the thickness of the top electrode 121. For example, when the thickness of the light-emitting functional layer 122 is about 100 nm and the thickness of the top electrode 121 is generally about 300 nm, the thickness of the top electrode 121 can be increased to more than 400 nm to ensure the electrical requirements of the top electrode 121.

[0046] Among them, 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, etc. By limiting the pore size 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 to below 500nm. In a specific embodiment, the pore size of the above particles can be limited to gradually increase with the process sequence. For example, the radial width of the particles of the hole injection layer formed first is 300nm, and the radial width of the particles of the subsequent hole transport layer is 330nm, which gradually increases at intervals of 30nm. By setting the radial width of the particles according to the sequential process of the film layer, the light-emitting material particles formed first can enter the bottom of the porous layer 132 as much as possible, avoiding the accumulation of light-emitting material particles on the upper part of the porous layer 132, resulting in the inability of particles of the subsequent film layer to enter. Of course, this embodiment only takes the above-mentioned upright light-emitting functional layer 122 as an example, and is also applicable to the inverted light-emitting functional layer 122 scheme. 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 stacked in sequence.

[0047] 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, 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 above 400 nm.

[0048] Specifically, the supporting layer 131 has a top surface 131a, a first side surface 131b and a second side surface 131c, and the first side surface 131b and the second side surface 131c are respectively arranged towards two adjacent opening areas 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; on the orthographic projection of the base substrate 101, the porous layer 132 overlaps with the top surface 131a of the supporting layer 131.

[0049] In this embodiment, the support layer 131 has a trapezoidal cross-section along a line connecting two adjacent light-emitting units, with the first side 131b and the second side 131c forming the waists of the trapezoid, and the top surface 131a forming the top surface 131a of the trapezoid. In this embodiment, the porous layer 132 is disposed only 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. The light-emitting functional layer 122 is formed on the first side 131b and the second side 131c of the support layer 131, and does not participate in the display.

[0050] Figure 4is a schematic diagram of the second display panel of the second embodiment of the present application, see Figure 4 As shown, in this 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 toward two adjacent opening areas 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 also has porous extensions 1321, which are arranged on both sides of the porous layer 132 and extend toward the first side surface 131b and the second side surface 131c of the support layer 131, respectively. In the orthographic projection of the substrate 101, the porous extensions 1321 overlap with the first side surface 131b or the second side surface 131c of the support layer 131. The porous layer 132 is connected to the porous extensions 1321 and is made of the same material.

[0051] In this solution, the porous layer 132 is extended to the first side surface 131b and the second side surface 131c of the support portion, so that the porous layer 132 has a sufficient partition area on the support layer 131 , thereby providing a porous layer 132 that surrounds the support layer 131 on multiple sides.

[0052] Specifically, the light-emitting unit further includes a bottom electrode 123, which is disposed under the light-emitting functional layer 122. The bottom electrode 123 is generally formed before the pixel definition layer 110 is formed. However, in order to avoid electrical connection between the highly conductive light-emitting material contained in the porous extension 1321 and the bottom electrode 123, a certain gap may be provided between the porous extension 1321 and the bottom electrode 123 in this embodiment. Figure 5 is a schematic diagram of the third display panel of the second embodiment of the present application, see Figure 5 As shown, in another embodiment, the porous layer 132 includes a first porous portion 1322 and a second porous portion 1323 , and the aperture of the holes in the first porous portion 1322 is larger than the aperture of the holes in the second porous portion 1323 .

[0053] In this embodiment, the apertures at different locations on the porous layer 132 are adjusted to achieve a better barrier effect. For example, the second porous portion 1323 is positioned on the side of the first porous portion 1322 closer to the opening 111. This ensures that the smaller apertures are located in the middle, away from two adjacent openings 111.

[0054] In this embodiment, two porous portions with different pore sizes are provided, with the second porous portion 1323 having a smaller pore size located in the middle of the porous partition structure 130, and the first porous portion 1322 having a larger pore size located at the edge of the porous partition structure 130. This allows the light-emitting functional layer 122 to be completely contained within the first porous portion 1322, thereby preventing the light-emitting material from forming a continuous film layer on the porous partition structure 130. Furthermore, the provision of the second porous portion 1323 having a smaller pore size allows for better film formation of the top electrode 121 on the second porous portion 1323.

[0055] In one embodiment, the diameter of the holes of the second porous portion 1323 may be smaller than the radial width of the particles of the light-emitting material.

[0056] The radial width of the particles of the light-emitting material is less than or equal to 500nm, the radial width of the particles of the top electrode 121 material is greater than or equal to 1000nm, the pore size of the holes of the first porous part 1322 is between 600nm and 1000nm, and the pore size of the holes of the second porous part 1323 can be less than 500nm.

[0057] 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 size 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 500nm, and the pore size of the above particles is limited to gradually increase with the process sequence. For example, the radial width of the particles of the first formed hole injection layer is 300nm, and the radial width of the particles of the subsequent hole transport layer is 330nm. When the radial width of the particles gradually increases at intervals of 30nm, the pore size of the second porous portion 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 smallest luminescent material particle in each film layer of the light-emitting functional layer 122.

[0058] Of course, the first porous portion 1322 and the second porous portion 1323 in this embodiment can also be arranged at the position of the porous extension portion 1321, so that the film forming quality of the top electrode 121 at this position is better.

[0059] Figure 6 is a schematic diagram of the display device of this application, see Figure 6 As shown, the present application also discloses a display device, which includes a driving circuit 210 and a display panel 100. The display panel 100 can be the display panel 100 in any of the above embodiments, wherein the driving circuit 210 is used to drive the display panel 100 to display.

[0060] It should be noted that the inventive concept of this application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the various embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the various embodiments or technical features are combined, the original technical effects will be enhanced.

[0061] The above content is a further detailed description of the present application in conjunction with specific optional implementation methods, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, they can make several simple deductions or substitutions without departing from the concept of the present application, which should be considered to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A pixel definition layer is provided on the base substrate and is provided with a plurality of opening areas; A plurality of light-emitting units are respectively arranged in the plurality of opening areas; as well as a porous partition structure, disposed on the pixel definition layer; Wherein, the light-emitting unit includes a light-emitting functional layer and a top electrode; the light-emitting functional layer is arranged under 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 luminescent material located at the position of the porous partition structure when the luminescent functional layer is deposited on the entire surface.

2. The display panel according to claim 1, wherein: The porous partition structure includes a plurality of holes, The display panel further includes a redundant light-emitting functional layer, which is disposed in the holes of the porous partition structure, and adjacent redundant light-emitting functional layers are separated from the light-emitting functional layers by the porous partition structure; Wherein, the redundant light-emitting functional layer and the light-emitting functional layer are formed by using light-emitting materials through the same process; 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 on the entire surface.

3. The display panel according to claim 2, wherein: The porous partition structure includes a support layer and a porous layer, wherein the porous layer is arranged on the support layer; The redundant light-emitting functional layer is arranged 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 aperture of the hole is larger than the radial width of the particles of the luminescent material.

4. The display panel according to claim 3, wherein: The top electrode is formed of a top electrode material, and the aperture of the hole is smaller than or equal to the radial width of 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.

5. The display panel according to claim 3, wherein: The support layer has a top surface, a first side surface, and a second side surface, wherein the first side surface and the second side surface are respectively arranged toward 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 an orthographic projection of the base substrate, the porous layer overlaps with a top surface of the support layer.

6. The display panel according to claim 5, wherein: The porous layer is further provided with porous extension parts, which are respectively provided on both sides of the porous layer and extend toward the first side surface of the support layer and the second side surface of the support layer.

7. The display panel according to claim 3, wherein: The porous layer includes a first porous portion and a second porous portion, wherein the pore size of the first porous portion is larger than the pore size of the second porous portion; The second porous portion is disposed on a side of the first porous portion close to the opening area.

8. The display panel according to claim 4, wherein: The radial width of the particles of the light-emitting material is less than or equal to 500 nm, the radial width of the particles of the top electrode material is greater than or equal to 1000 nm, and the pore diameter of the holes of the porous layer is between 600 nm and 1000 nm.

9. The display panel according to claim 3, wherein: The porous layer is formed by porous aerogel material.

10. A display device, characterized in that: The device comprises a driving circuit and the display panel according to any one of claims 1 to 9, wherein the driving circuit is used to drive the display panel to display.

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