WO2021208810A1 - 显示基板及其制备方法、显示面板、显示装置 - Google Patents
显示基板及其制备方法、显示面板、显示装置 Download PDFInfo
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- WO2021208810A1 WO2021208810A1 PCT/CN2021/086112 CN2021086112W WO2021208810A1 WO 2021208810 A1 WO2021208810 A1 WO 2021208810A1 CN 2021086112 W CN2021086112 W CN 2021086112W WO 2021208810 A1 WO2021208810 A1 WO 2021208810A1
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- layer
- limiting
- defining layer
- film layer
- pixel
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- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims description 3
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Images
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
- H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8052—Cathodes
- H10K59/80522—Cathodes combined with auxiliary electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
- H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
Definitions
- the embodiments of the present disclosure relate to a display substrate and a preparation method thereof, a display panel, and a display device.
- the thickness of the cathode of the sub-pixel is generally set to be small.
- At least one embodiment of the present disclosure provides a display substrate, including:
- a plurality of light-emitting structures formed on the substrate are A plurality of light-emitting structures formed on the substrate;
- a pixel defining layer is disposed on the substrate, the pixel defining layer has a plurality of pixel openings, the pixel defining layer includes a first defining layer and a second defining layer located on the first defining layer, the The material of the second limiting layer is a conductive material;
- each of the plurality of light-emitting structures includes a first electrode, a light-emitting material, and a second electrode, the first electrode is disposed on the substrate and located in a corresponding pixel opening, and the light-emitting material is disposed on the substrate.
- the second electrodes of the plurality of light-emitting structures are disposed on the light-emitting material to form an integrated structure, cover the pixel defining layer and electrically connected to the second defining layer.
- the pixel defining layer further includes a third defining layer, the third defining layer is located between the first defining layer and the second defining layer and is made of a hydrophobic material .
- the pixel defining layer further includes the third defining layer, the third defining layer is located on the second defining layer and made of a hydrophobic material, and the second defining layer At least a part of the layer is exposed from the third defining layer.
- the resistivity of the second defining layer is less than the resistivity of the second electrode.
- the material of the second limiting layer has hydrophobicity.
- the material of the first limiting layer is hydrophilic.
- the first electrode has a sandwich structure.
- the sandwich structure includes two indium tin oxide film layers and a silver film layer located between the two indium tin oxide film layers.
- the second defining layer is made of at least one of copper, silver, gold, and aluminum.
- the second electrode is made of one of magnesium-silver alloy, indium zinc oxide, or indium tin oxide.
- At least one embodiment of the present disclosure provides a display panel including the above-mentioned display substrate.
- At least one embodiment of the present disclosure provides a display device including the above-mentioned display panel.
- At least one embodiment of the present disclosure provides a method for preparing a display substrate, including:
- a pixel defining layer is formed on the substrate, and the pixel defining layer includes a first defining layer and a second defining layer on the first defining layer, wherein the pixel defining layer has a plurality of pixel openings, so The plurality of pixel openings correspond to the plurality of first electrodes one by one and expose the plurality of first electrodes, and the material of the second defining layer is a conductive material;
- luminescent materials are respectively formed on the plurality of first electrodes.
- a second electrode is formed on the luminescent material, the second electrode is an integral structure and covers the pixel defining layer, and the second electrode is electrically connected to the second defining layer.
- forming the pixel defining layer on the substrate includes:
- the second defining film layer and the first defining film layer are etched to form the pixel defining layer having the plurality of pixel openings, wherein the plurality of pixel openings expose the plurality of first electrodes.
- the pixel defining layer further includes a third defining layer located between the first defining layer and the second defining layer, and forming the pixel defining layer on the substrate includes:
- the second limiting film layer, the third limiting film layer, and the first limiting film layer are respectively etched to form the plurality of pixel openings, wherein the plurality of pixel openings expose the plurality of first Electrodes;
- a third limiting film layer is formed on the second limiting layer, and the third limiting film layer is patterned so that at least a part of the second limiting layer is exposed.
- the material of the first limiting layer is hydrophilic.
- the material of the second limiting layer has hydrophobicity.
- the luminescent material is formed by an inkjet printing process.
- the resistivity of the second defining layer is less than the resistivity of the second electrode.
- the pixel defining layer includes a first defining layer and a second defining layer located on the first defining layer, the material of the second defining layer is a conductive material, and the second electrode is electrically connected to the second defining layer, Therefore, the second limiting layer can reduce the resistance of the second electrode, reduce the voltage drop on the second electrode, and thereby reduce the difference in current between the center area and the edge area of the display substrate, thereby improving the display brightness of different areas of the display substrate. Uniformity helps to improve the user experience.
- Fig. 1 is a schematic structural diagram of a display substrate according to an exemplary embodiment of the present disclosure
- Fig. 2 is a partial cross-sectional view of a display substrate according to an exemplary embodiment of the present disclosure
- FIG. 3 is a flowchart of a manufacturing method of a display substrate according to an exemplary embodiment of the present disclosure
- FIG. 4 is a flowchart of a manufacturing method of a display substrate according to another exemplary embodiment of the present disclosure
- FIG. 5 is a flowchart of a manufacturing method of a display substrate according to still another exemplary embodiment of the present disclosure.
- FIG. 6 is a flowchart of a manufacturing method of a display substrate according to another exemplary embodiment of the present disclosure.
- first, second, third, etc. may be used in this disclosure to describe various information, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
- first information may also be referred to as second information, and similarly, the second information may also be referred to as first information.
- word “if” as used herein can be interpreted as "when” or “when” or "in response to determination”.
- the direction from the substrate to the first electrode layer is defined as up, and the direction from the first electrode layer to the substrate is defined as down, so as to determine the up and down directions. It is easy to understand that different ways of defining directions will not affect the actual operation content of the process and the actual form of the product.
- the problem is that the user experience is poor.
- the display substrate 100 includes a substrate 10, a pixel defining layer 30, and a plurality of light emitting structures.
- the pixel defining layer 30 is disposed on the substrate 10 and has a plurality of pixel openings 301.
- the pixel defining layer 30 includes a first defining layer 31 and a second defining layer 32 located on the first defining layer 31, and the material of the second defining layer 32 is a conductive material.
- Each of the plurality of light-emitting structures includes a first electrode 20, a light-emitting material 40, and a second electrode 50.
- the first electrode 20 is disposed on the substrate 10 and located in the pixel opening 301, and the light-emitting
- the material 40 is arranged in the pixel opening 301 and on the first electrode 20, and the second electrodes 50 of the plurality of light-emitting structures are arranged on the light-emitting material 40 to form an integrated structure and cover the
- the pixel defining layer 30 is electrically connected to the second defining layer 32.
- the second electrode 50 covering the pixel defining layer 30 means that the second electrode 50 covers each pixel opening 301, a portion of the pixel defining layer 30 between adjacent pixel openings 301, and a portion of the pixel defining layer 30 on the edge.
- the pixel defining layer 30 includes a first defining layer 31 and a second defining layer 32 located on the first defining layer 31.
- the material of the second defining layer 32 is a conductive material, and the second electrode 50 is electrically connected to the second confinement layer 32, the second confinement layer 32 can reduce the resistance of the second electrode 50, reduce the voltage drop on the second electrode 50, and thereby can reduce the current in the center area and the edge area of the display substrate Therefore, the uniformity of the display brightness in different areas of the display substrate can be improved, which helps to improve the user experience.
- the substrate 10 may be a flexible substrate, and the material of the flexible substrate may be an organic material such as polyimide.
- the substrate 10 may be a rigid substrate, and the material of the rigid substrate may be, for example, glass, metal, plastic, or the like.
- the first electrode 20 may be an anode
- the second electrode 50 may be a cathode.
- the pixel defining layer 30 further includes a third defining layer 33, and the material of the third defining layer 33 is a hydrophobic material.
- the third limiting layer 33 is located above the second limiting layer 32, or as shown in Figure 2, the third limiting layer 33 is located between the first limiting layer 31 and the second limiting layer 31. Define between layers 32.
- the depth of the pixel opening 301 can be increased by providing the third limiting layer 33, and avoiding ink overflowing the pixel opening 301 when the luminescent material is formed by the inkjet printing process .
- the third limiting layer 33 is hydrophobic, it can prevent the uneven film thickness of the luminescent material formed due to ink climbing, which helps to improve the problem of uneven film formation of the luminescent material caused by ink climbing.
- the second electrode 50 is electrically connected to the top and sides of the second confinement layer 32, so that the two are electrically connected.
- the distance between the upper surface of the luminescent material 40 and the substrate 10 is smaller than the distance between the upper surface of the second confinement layer 32 and the substrate 10.
- At least a part of the sidewall of the second limiting layer 32 is electrically connected to the second electrode 50, thereby achieving electrical connection between the two.
- the third confinement layer 33 is located above the second confinement layer 32, and the third confinement layer 33 does not completely cover the second confinement layer 32, that is, the first confinement layer The second limiting layer 32 is exposed. In this way, when the second electrode 50 is formed, it is ensured that the second electrode 50 is electrically connected to the exposed portion of the second confinement layer 32, and the electrical connection between the second electrode 50 and the second confinement layer 32 is guaranteed.
- the material of the second defining layer 32 has hydrophobicity.
- the second limiting layer 32 can prevent the ink from climbing to cause uneven film thickness of the formed luminescent material, and further improve the service life and display effect of the display substrate.
- the material of the third limiting layer 33 is polyimide doped with fluorinated resin, or polymethyl methacrylate doped with fluorinated resin. In this way, the hydrophobicity of the third confining layer 33 can be better, so that the resistance of the ink when flowing to the third confining layer 33 is greater, and the amount of climbing of the ink can be reduced.
- the material of the first defining layer 31 is a hydrophilic material. In this way, when the inkjet printing process is used to form the luminescent material, the ink is distributed more uniformly at the pixel opening 301, which helps to improve the uniformity of the film thickness of the luminescent material.
- the material of the first defining layer 31 may be silicon oxide, silicon nitride, or the like, for example.
- the sidewall of the pixel opening 301 may be a relatively smooth curved surface, and the sidewall of the pixel opening 301 extends obliquely in a direction away from the pixel opening 301. That is, among the three film layers of the pixel defining layer 30, no step is formed between two adjacent film layers. In this way, the climbing difficulty of the second electrode 50 can be reduced, and the risk of the second electrode 50 breaking during the evaporation process can be reduced.
- the first electrode 20 may be a sandwich structure, including two indium tin oxide film layers and a silver film layer between the two indium tin oxide film layers. In other embodiments, the first electrode 20 can also be made of other materials.
- the resistivity of the second limiting layer 32 is less than the resistivity of the second electrode 50.
- the arrangement of the second limiting layer 32 can effectively reduce the resistance of the second electrode 50, thereby effectively reducing the problem of uneven display brightness of the display substrate caused by voltage drop.
- the material of the second defining layer 32 includes at least one of copper, silver, gold, and aluminum. In this way, the resistivity of the second limiting layer 32 can be made smaller, which helps to reduce the resistance of the second electrode 50. In addition, the hydrophobicity of the second limiting layer 32 can be made better.
- the material of the second electrode 50 is a magnesium-silver alloy, or the material of the second electrode 50 may also be indium zinc oxide or indium tin oxide. In this way, the light transmittance of the second electrode 50 can be higher.
- the display substrate 100 further includes an electron injection layer 60 located between the luminescent material 40 and the second electrode 50, and the material of the electron injection layer 60 may be sodium fluoride.
- the electron injection layer 60 covers the pixel defining layer, that is, the orthographic projection of the electron injection layer 60 on the substrate 10 covers the substrate 10, and the second defining layer 32 is in direct contact with the electron injection layer 60
- the second limiting layer 32 is electrically connected to the second electrode 50 through the electron injection layer 60, and the electron injection layer 60 and the second electrode 50 can be regarded as a composite electrode.
- the second limiting layer 32 can reduce the total resistance of the composite electrode formed by the electron injection layer 60 and the second electrode 50, thereby reducing the resistance of the second electrode 50, which helps to improve the uniformity of the display brightness of the display substrate.
- the electron injection layer 60 includes a plurality of electron injection parts corresponding to the pixel openings 301 one-to-one, and the electron injection parts are located in the corresponding pixel openings 301.
- the electron injection part can improve the ability of electron injection.
- the electron injection layer 60 is provided as a plurality of electron injection parts corresponding to the pixel openings 301 one-to-one, and the electron injection parts are located in the corresponding pixel openings 301, so the electron injection parts do not cover the sides and top of the second limiting layer 32 ,
- the second defining layer 32 is in direct contact with the second electrode 50.
- the display substrate 100 may also include an electron transport layer located between the electron injection part and the luminescent material 40, and the electron transport layer may include electron transport parts arranged in one-to-one correspondence with the plurality of pixel openings 301, Each electron transmission part is located in the corresponding pixel opening.
- the display substrate 100 may not include an electron transport layer, and some substances are added to the luminescent material to make the luminescent material have the ability to transport electrons, thereby omitting the electron transport layer. With this arrangement, the electron transport layer does not hinder the electrical connection between the second confinement layer and the second electrode 50. Compared with the solution that the electron transport layer covers the pixel confinement layer 30, the electron transport layer does not need to be broken down, which helps to improve the display substrate's performance. reliability.
- the display substrate 100 includes a hole injection layer and a hole transport layer located between the luminescent material 40 and the first electrode 20, and the hole injection layer is located between the hole transport layer and the first electrode 20.
- the hole injection layer includes a plurality of hole injection parts corresponding to the first electrode one to one
- the hole transport layer includes a hole transport part corresponding to the plurality of electrode blocks one to one.
- the display substrate 100 may further include a pixel circuit layer 70.
- the pixel circuit layer 70 is provided with a plurality of pixel circuits for driving sub-pixels, and each sub-pixel may correspond to one pixel circuit.
- the display substrate 100 includes sub-pixels of at least three different colors.
- the display substrate may include sub-pixels of three colors of red, green, and blue.
- the sub-pixels of different colors are individually controlled to emit light, thereby achieving color display; or, the light-emitting structure in the display substrate 100 emits white light.
- the display substrate further includes a color filter located above the second electrode 50. Light sheet, through the color filter to achieve the display of color images.
- the embodiment of the present disclosure also provides a method for preparing the display substrate.
- the method for preparing the display substrate includes the following steps S110 to S150.
- step S110 a substrate is provided.
- the substrate 10 may be a flexible substrate, and the material of the flexible substrate may be an organic material such as polyimide.
- the substrate 10 may be a rigid substrate, and the material of the rigid substrate may be, for example, glass, metal, plastic, or the like.
- step S120 a plurality of first electrodes are formed on the substrate.
- a first electrode layer is formed on the substrate, and then the first electrode layer is patterned to form a plurality of first electrodes 20 as anodes of a plurality of light-emitting structures.
- the plurality of first electrodes 20 are arranged in an array on the substrate 10.
- a pixel defining layer is formed on the substrate.
- the pixel defining layer includes a first defining layer and a second defining layer located on the first defining layer, wherein the pixel defining layer has multiple Pixel openings, the plurality of pixel openings correspond to the plurality of first electrodes one by one and expose the plurality of first electrodes, and the material of the second defining layer is a conductive material.
- the first limiting layer 31 is formed of a hydrophilic material
- the second limiting layer 32 is formed of a first hydrophobic material.
- the hydrophilic material may be silicon oxide, silicon nitride, or the like.
- forming the pixel defining layer on the substrate includes:
- step S130A a first limiting film layer is formed on the substrate, and the first limiting film layer covers the entire substrate;
- step S130B the second limiting film layer is formed on the first limiting film layer, and the second limiting film layer covers the entire first limiting film layer;
- step S130C a photoresist is coated on the second limiting film layer, and the photoresist is exposed and developed to form a photoresist removal area corresponding to the pixel opening to be formed;
- step S130D the second limiting film layer and the first limiting film layer are etched to form the plurality of pixel openings, wherein the plurality of pixel openings expose the plurality of first electrodes.
- the first limiting film layer after forming the first limiting film layer, the first limiting film layer may be patterned to form the first limiting layer, and after the second limiting film layer is formed, the second film layer may be patterned to form the second limiting film layer. Two defining layers, thereby forming the pixel defining layer.
- the pixel defining layer 30 further includes a third defining layer 33, and the material of the third defining layer 33 is a second hydrophobic material.
- the second hydrophobic material is polyimide doped with fluorinated resin, or polymethyl methacrylate doped with fluorinated resin.
- the third confinement layer 33 is located between the first confinement layer and the second confinement layer, see FIG. 5, in this case, the substrate
- the step S130 of forming a pixel defining layer on it includes the following steps S130A' to S130E'.
- step S130A' a first limiting film layer is formed on the substrate, and the first limiting film layer covers the entire substrate.
- step S130B' a third limiting film layer is formed on the first limiting film layer, and the third limiting film layer covers the entire first limiting film layer.
- step S130C' a second limiting film layer is formed on the third limiting film layer, and the second limiting film layer covers the entire third limiting film layer.
- step S130D' a photoresist is formed on the second limiting film layer, and the photoresist is exposed and developed to form a photoresist removal area corresponding to the pixel opening to be formed;
- step S130E' the second limiting film layer, the third limiting film layer, and the first limiting film layer are respectively etched to form the plurality of pixel openings, wherein the plurality of pixel openings are exposed in one-to-one correspondence.
- the plurality of first electrodes are respectively etched to form the plurality of pixel openings, wherein the plurality of pixel openings are exposed in one-to-one correspondence.
- the second limiting film layer, the third limiting film layer, and the first limiting film layer can be etched by a wet etching process. Due to the different materials of the second, third, and first limiting films, different etching solutions are selected to etch the second, third, and first limiting films.
- the material of the second limiting film layer is generally a metal material, and an acid etching solution is selected to etch the second limiting film layer.
- an alkaline etching solution is used to etch the third limiting film layer. eclipse.
- an acidic etching solution is selected to etch the first limiting film layer.
- each film layer is formed to form an opening in the film layer.
- the opening positions in the first limited film layer, the second limited film layer, and the third limited film layer correspond to each other to form A pixel opening in the pixel defining layer.
- the third confinement layer is located on the second confinement layer, and the first confinement layer is made of a hydrophilic material.
- a pixel confinement layer is formed on the substrate. Step 130 of the layer includes the following steps S130A" to S130E".
- step S130A' a first limiting film layer is formed on the substrate, and the first limiting film layer covers the entire substrate.
- step S130B a second limiting film layer is formed on the first limiting film layer, and the second limiting film layer covers the entire first limiting film layer.
- step S130C a photoresist is coated on the second limiting film layer, and the photoresist is exposed and developed to form a photoresist removal area corresponding to the pixel opening to be formed.
- step S130D the first confinement film layer and the second confinement film layer are simultaneously etched to form through holes penetrating the first confinement film layer and the second confinement film layer, thereby forming the first confinement layer and the second confinement film layer.
- Layer and pixel openings located in the first defining layer and the second defining layer, the pixel openings exposing the first electrode.
- a wet etching process can be used to simultaneously etch the first and second confined film layers.
- the first confined film and the second confined film can be both etched. React with the same etching solution.
- the material of the first confinement film layer is silicon oxide or silicon nitride
- the material of the second confinement film layer is a metal material
- the first confinement film layer and the second confinement film layer can be etched simultaneously with an acid etching solution.
- step S130E a third limiting film layer is formed on the second limiting layer, and the third limiting film layer is patterned so that at least a part of the second limiting layer is exposed.
- a wet etching process may be used to etch the third limiting film layer.
- the etching solution can be an alkaline etching solution.
- a luminescent material is formed on the first electrode in the pixel opening.
- an inkjet printing process may be used to form the luminescent material.
- the second confinement layer 32 and the third confinement layer 33 are hydrophobic, which can improve the uneven film formation of the luminescent material caused by ink climbing.
- the first limiting layer 31 is hydrophilic, and the ink is relatively uniformly distributed at the pixel opening 301, which helps to improve the uniformity of the film thickness of the luminescent material.
- a second electrode is formed on the luminescent material, the second electrode is an integral structure and covers the pixel defining layer, and the second electrode is electrically connected to the second defining layer.
- the preparation method of the display substrate before the step S150 of forming the second electrode on the luminescent material, the preparation method of the display substrate further includes the following step: forming an electron injection layer on the luminescent material 40.
- the electron injection layer 60 covers the pixel defining layer. That is, the electron injection layer 60 covers the entire substrate 10.
- the electron injection layer 60 includes a plurality of electron injection parts corresponding to the pixel openings 301 one-to-one, and the electron injection parts are disposed in the corresponding pixel openings.
- the material of the electron injection layer 60 is sodium fluoride.
- the resistivity of the second limiting layer 32 is less than the resistivity of the second electrode 50.
- the material of the second defining layer 32 may include at least one of copper, silver, gold, and aluminum.
- the preparation method may further include: forming a pixel circuit layer 70 on the substrate, and the first electrode 20 is formed on the pixel. On the circuit layer 70.
- the pixel defining layer 30 includes a first defining layer 31 and a second defining layer 32 located on the first defining layer 31.
- the material is a conductive material
- the second electrode 50 is electrically connected to the second confinement layer 32
- the second confinement layer 32 can reduce the resistance of the second electrode 50, reduce the voltage drop on the second electrode 50, and thus can reduce the display substrate
- the difference in current between the center area and the edge area of the display substrate improves the uniformity of the display brightness in different areas of the display substrate, which helps to improve the user experience.
- At least one embodiment of the present disclosure also provides a display panel including the display substrate 100 described in any of the above-mentioned embodiments.
- the display panel may further include an encapsulation layer and a cover plate on the side of the display substrate 100 away from the substrate 10.
- At least one embodiment of the present disclosure also provides a display device, which includes the above-mentioned display panel.
- the display device may further include a housing, and the display panel is connected to the housing, for example, the display panel is embedded in the housing.
- the display device may be, for example, any device with a display function, such as a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, and a navigator.
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Abstract
Description
Claims (20)
- 一种显示基板,包括:衬底;多个发光结构,设置在所述衬底上;像素限定层,设置在所述衬底上,所述像素限定层具有多个像素开口,所述像素限定层包括第一限定层及位于所述第一限定层上的第二限定层,所述第二限定层的材料为导电材料;其中,所述多个发光结构的每一个包括第一电极、发光材料以及第二电极,所述第一电极设置在所述衬底上并位于相应的像素开口中,所述发光材料设置在所述第一电极上,所述多个发光结构的所述第二电极设置在所述发光材料上,形成一体结构,并覆盖所述像素限定层且与所述第二限定层电连接。
- 根据权利要求1所述的显示基板,其中,所述像素限定层还包括第三限定层,所述第三限定层位于所述第一限定层与所述第二限定层之间并由疏水性材料制成。
- 根据权利要求1或2所述的显示基板,其中,所述像素限定层还包括第三限定层,所述第三限定层位于所述第二限定层上并由疏水性材料制成,所述第二限定层的至少一部分从所述第三限定层露出。
- 根据权利要求1至3中任何一项所述的显示基板,其中,所述第二限定层的电阻率小于所述第二电极的电阻率。
- 根据权利要求1至4中任何一项所述的显示基板,其中,所述第二限定层的材料具有疏水性。
- 根据权利要求1至5中任何一项所述的显示基板,其中,所述第一限定层由亲水性材料制成。
- 根据权利要求1至6中任何一项所述的显示基板,其中,所述第一电极为夹层结构。
- 根据权利要求7所述的显示基板,其中,所述夹层结构包括两层氧化铟锡膜层及位于两层氧化铟锡膜层之间的银膜层。
- 根据权利要求1至8中任何一项所述的显示基板,其中,所述第二限定层由铜、银、金及铝中的至少一种制成。
- 根据权利要求1至9中任何一项所述的显示基板,其中,所述第二电极由镁银合金、氧化铟锌或氧化铟锡中的一种制成。
- 一种显示面板,包括权利要求1至10中任一项所述的显示基板。
- 一种显示装置,包括权利要求11所述的显示面板。
- 一种显示基板的制备方法,包括:提供衬底;在所述衬底上形成多个第一电极;在所述衬底上形成像素限定层,所述像素限定层包括第一限定层及位于所述第一限定层上的第二限定层,其中,所述像素限定层具有多个像素开口,所述多个像素开口一一对应于所述多个第一电极并暴露所述多个第一电极,所述第二限定层的材料为导电材料;在所述像素开口内,在所述多个第一电极上分别形成发光材料;在所述发光材料上形成第二电极,所述第二电极为一体结构,并覆盖所述像素限定层,且所述第二电极与所述第二限定层电连接。
- 根据权利要求13所述的方法,其中,在所述衬底上形成所述像素限定层包括:在所述衬底上形成第一限定膜层,所述第一限定膜层覆盖整个所述衬底;在所述第一限定膜层上形成所述第二限定膜层,所述第二限定膜层覆盖整个所述第一限定膜层;在所述第二限定膜层上涂覆光刻胶;对所述光刻胶进行曝光显影,形成对应于待形成的像素开口的光刻胶去除区域;以及刻蚀所述第二限定膜层和所述第一限定膜层,形成具有所述多个像素开口的所述像素限定层,其中,所述多个像素开口暴露所述多个第一电极。
- 根据权利要求13所述的方法,其中,所述像素限定层还包括位于所述第一限定层和第二限定层之间的第三限定层,在所述衬底上形成所述像素限定层包括:在所述衬底上形成第一限定膜层,所述第一限定膜层覆盖整个所述衬底;在所述第一限定膜层上形成第三限定膜层,所述第三限定膜层覆盖整个所述第一限定膜层;在所述第三限定膜层上形成第二限定膜层,所述第二限定膜层覆盖整个所述第三限定膜层;在所述第二限定膜层上形成光刻胶,对光刻胶进行曝光显影,形成对应于待形成的像素开口的光刻胶去除区域;以及对第二限定膜层、第三限定膜层以及第一限定膜层分别进行刻蚀,形成所述多个像 素开口,其中,所述多个像素开口一一对应地暴露所述多个第一电极。
- 根据权利要求13所述的方法,其中,所述像素限定层还包括位于第二限定层上的第三限定层,在所述衬底上形成所述像素限定层包括:在所述衬底上形成第一限定膜层,所述第一限定膜层覆盖所述衬底;在所述第一限定膜层上形成第二限定膜层,所述第二限定膜层完全覆盖所述第一限定膜层;在所述第二限定膜层上涂覆光刻胶,对光刻胶进行曝光显影,形成对应于待形成的像素开口的光刻胶去除区域;同时对第一限定膜层与第二限定膜层进行刻蚀,形成第一限定层和第二限定层;以及在所述第二限定层上形成第三限定膜层,对所述第三限定膜层进行图案化,使得所述第二限定层的至少一部分暴露出来。
- 根据权利要求13至16中任何一项所述的方法,其中,所述第一限定层的材料具有亲水性。
- 根据权利要求13至17中任何一项所述的方法,其中,所述第二限定层的材料具有疏水性。
- 根据权利要求13至18中任何一项所述的方法,其中,所述发光材料通过喷墨打印工艺形成。
- 根据权利要求13至19中任何一项所述的方法,其中,所述第二限定层的电阻率小于所述第二电极的电阻率。
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