Display panel and method of manufacturing the same

Abstract

Embodiments of the present application provide a display panel and a manufacturing method thereof. The display panel comprises: a substrate; a thin film transistor layer arranged on one side of the substrate; a pixel definition layer arranged on a side of the thin film transistor layer away from the substrate; the pixel definition layer comprises a plurality of pixel openings; a plurality of light emitting units are arranged in the pixel openings one by one, and the light emitting unit comprises, in sequence from the substrate, an anode, a first film layer, a light emitting layer and a cathode; the first film layer comprises a nanowire structure; the nanowire structure is formed by using the micro-phase separation of rigid-rigid block polymers and the self-assembly characteristics of rigid-flexible block polymers, so that the surface roughness of the droplets of the design organic solution in the pixel opening is increased, the coffee ring effect is reduced, the film thickness uniformity of the light emitting layer is improved, the carrier injection performance of the display panel is improved, and the performance of the display panel is improved.

Description

TECHNICAL FIELD

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

[0002] Modern display devices develop towards high density, high resolution, energy saving, color and large screen. Inkjet printing manufacturing technology is widely used in OLED (Organic Light Emitting Diode) display field because of its simpler process and lower cost.

[0003] However, during the inkjet printing drying process, the solid pixel defining layer surface hinders the movement of the droplet edge containing the light emitting layer material in the evaporation process, forming a coffee ring effect, resulting in poor light emitting layer film thickness uniformity of the pixel, causing light emitting uniformity. SUMMARY

[0004] The present application is directed to the shortcomings of the prior art, and proposes a display panel and a manufacturing method thereof to solve the technical problem of poor light emitting layer film thickness uniformity of the pixel in the prior art.

[0005] In a first aspect, the embodiments of the present application provide a manufacturing method of a display panel, comprising:

[0006] The block polymer is added to the first solvent or the second solvent to form a design organic solution; the design organic solution is set to the pixel opening of the pixel defining layer of the intermediate display panel in an inkjet printing manner to form a first film layer containing a nanowire structure; wherein the block polymer includes at least one of rigid-flexible block semiconductor polymer and rigid-rigid block semiconductor polymer; the rigid-rigid block polymer is selected from P3BT-b-P3HT, P3HT-b-P3EHT, P3HT-b-P3HHT, P3HT-b-P3PT; the rigid-flexible block polymer is selected from one of PF-b-PAA, OFPHM; the first solvent is any one of chlorobenzene solution, methanol / pyridine mixed solvent, anisole / chloroform mixed solvent, o-dichlorobenzene / chloroform mixed solvent; the second solvent is any one of chloroform solution, ethanol solution. Optionally, the design organic solution is set to the pixel opening of the pixel defining layer of the display panel in an inkjet printing manner to form a nanowire structure, comprising: when the block polymer is a rigid-rigid block polymer, the design organic solution is set to the pixel opening in an inkjet printing manner, and then the intermediate display panel with the design organic solution is baked to obtain a nanowire structure; the different rigid segments in the rigid-rigid block polymer have a design mass ratio.

[0007] Optionally, the design quality ratio range comprises 56 / 44-83 / 17; and the baking temperature range is 35℃-240℃.

[0008] Optionally, the baking of the intermediate display panel with the designed organic solution to obtain the nanowire structure comprises: when the rigid-rigid block polymer is P3HT-b-P3HHT, annealing the intermediate display panel with the designed organic solution in a 200℃ environment for 1h to obtain the nanowire structure.

[0009] Optionally, the adding of the block polymer into the first solvent or the second solvent to form the designed organic solution comprises: adding the rigid-flexible block polymer into the second solvent, and adding a poor solvent to form the organic solution, so that the rigid-flexible block polymer in the organic solution self-assembles to form the preliminary nanowire structure; the block polymer comprises the rigid-flexible block polymer; and the poor solvent comprises a 90% methanol solution by volume.

[0010] Optionally, the volume ratio of methanol to pyridine in the methanol / pyridine mixed solvent is 20:80; the volume ratio of anisole to chloroform in the anisole / chloroform mixed solvent is less than or equal to 2:1; and the first solvent comprises the methanol / pyridine mixed solvent or the anisole / chloroform mixed solvent.

[0011] Optionally, the adding of the block polymer into the first solvent or the second solvent to form the designed organic solution comprises: when the rigid-flexible block polymer is OFPHM, the OFPHM and the ethanol solution form the designed organic solution with a concentration of 0.125wt%; when the rigid-flexible block polymer is PF-b-PAA, the PF-b-PAA and the chloroform solution form a mixed solution with a volume ratio of 10%, and then a poor solvent is added to form the designed organic solution; and the second solvent comprises the chloroform solution or the ethanol solution.

[0012] In a second aspect, the embodiments of the present application provide a display panel, which is manufactured by the display panel manufacturing method described above, and comprises: a substrate; a thin film transistor layer arranged on one side of the substrate; a pixel definition layer arranged on a side of the thin film transistor layer away from the substrate; the pixel definition layer comprises a plurality of pixel openings; and a plurality of light emitting units are arranged in the pixel openings one by one, and each light emitting unit comprises an anode, a first film layer, a light emitting layer, and a cathode arranged in sequence away from the substrate; and the first film layer comprises a nanowire structure.

[0013] Optionally, the material of the hole injection layer is any one of the following: PEDOT:PSS, PFI (perfluoro ionomer) doped PEDOT:PSS, and a polyaniline and PEDOT:PSS mixture.

[0014] PEDOT:PSS is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid).

[0015] The material of the hole transport layer is any one of the following: a propylene oxide system, TPD (N-N'-diphenyl-N-N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine), QUPD (N-N'-di(4-(6-(3-oxabicyclo-3-yl)methoxy)-ethoxy)phenyl-N-N'-di(4-methoxyphenyl) biphenyl-4,4'-diamine), a styrene system, VB (vinylbenzyl)-TCTA (4,4',4''-tris-(N-carbazolyl)-triphenylamine), PFCB (perfluorocyclobutane).

[0016] Optionally, the light-emitting layer comprises a first color light-emitting structure, a second color light-emitting structure, and a third color light-emitting structure; the material of the third color light-emitting structure is any one of the following: polyfluorene, S,S-dioxy-dibenzothiophene; the material of the first color light-emitting structure is methoxyisooctyloxy; and the material of the second color light-emitting structure is poly-p-phenylenevinylene.

[0017] The technical scheme provided by the embodiments of the present application has at least the following beneficial technical effects:

[0018] By using the microphase separation of rigid-rigid block polymers and the self-assembly characteristics of rigid-flexible block polymers, the organic design solution containing the block polymers is placed in the pixel opening in an inkjet printing manner, and in a subsequent drying process such as baking, the block polymers form a first film layer containing nanowire structures, the nanowire structures increase the surface roughness of the droplets of the design organic solution in the pixel opening, thereby increasing the surface roughness of the light-emitting layer, the pinning point change can be inhibited, the capillary flow effect of the droplets from inside to outside can be inhibited, the coffee ring effect can be reduced, and the film thickness uniformity of the light-emitting layer can be improved.

[0019] Moreover, in the drying process of the design organic solution, the block polymers form nanowire structures in a self-assembly form, an additional assembly operation or step is saved, and the manufacturing process can be simplified. The nanowire structures are smaller in size than the structures formed after drying of the solution in the related art, and do not need to add an additional active agent, which is beneficial to improving the carrier injection performance of the display panel and improving the performance of the display panel.

[0020] Additional aspects and advantages of the present application will be made apparent from the following description, which, taken in conjunction with the accompanying drawings, which are shown by way of illustration, not of limitation. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1A method for manufacturing a display panel is provided.

[0023] Figure 2 A structure diagram of a plurality of block polymers is provided.

[0024] Figure 3 A structure diagram of a nanowire structure obtained from a rigid-flexible block polymer is provided.

[0025] Figure 4 A structure diagram of a display panel is provided. The reference signs are explained as follows.

[0026] 1 - display panel;

[0027] 10 - substrate;

[0028] 11 - thin film transistor layer;

[0029] 111 - source / drain; 112 - dielectric layer; 113 - anode;

[0030] 12 - pixel defining layer;

[0031] 13 - first film layer

[0032] 14 - hole transport layer;

[0033] 15 - light emitting layer;

[0034] 16 - electron transport layer;

[0035] 17 - cathode;

[0036] M - rigid polymer; N - flexible polymer;

[0037] X - nanowire structure; Y - second solvent. DETAILED DESCRIPTION

[0038] Embodiments of the present application will be described herein below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions of the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions of the embodiments of the present application. Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as that generally understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as such.

[0039] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application’s specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any unit and all combinations of one or more associated listed items. To make the objectives, technical solutions, and advantages of this application clearer, embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0040] In related technologies, inkjet printing can effectively reduce costs, but during the ink drying process, the inconsistent drying speed of the inner and outer edges results in a coffee ring effect, causing poor uniformity of the film thickness of the display panel and a decrease in luminescence.

[0041] This application provides a display panel and its manufacturing method, aiming to solve the above-mentioned technical problems of the prior art. This method allows for the self-assembly of nanostructures from block polymers dried in different solvents, increasing the roughness of the display panel and improving its surface energy. This enables the technical solution of this application to achieve the effects of improving film thickness uniformity, enhancing the carrier injection capability of the display panel, simplifying operation, and reducing costs.

[0042] This application provides a method for manufacturing a display panel, the process of which is shown in the schematic diagram below. Figure 1 As shown, it includes the following steps:

[0043] S1: Add the block polymer to the first solvent or the second solvent to form the designed organic solution.

[0044] The rigid-rigid block polymer is selected from one of P3BT-b-P3HT(poly(3-butylthiophene)-b-poly(3-hexyl-thiophene), P3HT-b-P3EHT poly(3-hexylthiophene)-b-poly(3-(2′-ethyl)hexylthiophene, P3HT-b-P3HHT poly(3-hexylthiophene)-b-poly(3-(6-hydroxy)hexylthiophene), and P3HT-b-P3PT(poly(3-hexylthiophene)-block-poly(3-phenoxymethylthiophene).

[0045] The rigid-flexible block polymer is selected from one of PF-b-PAA poly[2,7-(9,9-dihexylfluorene)]-b-poly(acrylic acid), OFPHM.

[0046] The first solvent is any one of chlorobenzene solution, methanol / pyridine mixed solvent, anisole / chloroform mixed solvent, o-dichlorobenzene / chloroform mixed solvent.

[0047] The second solvent is any one of chloroform solution, ethanol solution.

[0048] The block polymer involved in the embodiments of the present application can also be referred to as a block copolymer. The block copolymer has at least two or more monomers in the main chain, and is polymerized to form a polymer combined by long sequences (i.e., segments) connected at the ends. The block polymer includes one of a rigid-rigid block polymer and a rigid-flexible block polymer. Referring to Figure 2 , M is a different kind of rigid block polymer, and N is a flexible block polymer. The rigid-rigid block polymer refers to a block polymer formed by covalently connecting at least two different rigid block polymers. The rigid-flexible block polymer refers to a block polymer formed by covalently connecting at least one rigid block polymer and at least one flexible block polymer.

[0049] The rigid polymer refers to a polymer with prominent non-elastic body, and the flexible polymer refers to a copolymer with prominent flexibility.

[0050] S2: The design organic solution is arranged in the pixel opening of the pixel defining layer of the middle display panel in an inkjet printing manner to form a first film layer containing the nanowire structure.

[0051] Before baking, the rigid-rigid block polymer is dispersed in the design organic solution, and during the baking process, the rigid-rigid block polymer is aggregated into a group to form the nanowire structure.

[0052] Referring to Figure 3 Before drying, the flexible block polymer in the rigid-flexible block polymer is relaxed in the design organic solution, and the rigid block polymer is aggregated in the design organic solution. During the drying process, the rigid-flexible block polymer is self-assembled to form the nanowire structure.

[0053] The formed nanowire structure increases the surface roughness of the droplets in the designed organic solution within the pixel opening, thereby increasing the surface roughness of the light-emitting layer. This suppresses pinning point changes, inhibits capillary flow from the inside out of the droplets, reduces the coffee ring effect, and improves the uniformity of the first film layer thickness after baking. Since the light-emitting layer is located on the side of the first film layer away from the anode, its thickness uniformity is improved due to the influence of the first film layer thickness. During the drying process of the designed organic solution, the block polymer forms the nanowire structure through self-assembly, saving additional assembly operations or steps and simplifying the manufacturing process. Compared to structures formed after solution drying in related technologies, the nanowire structure is smaller in size and requires no additional surfactants, which is beneficial for improving the carrier injection performance of the display panel and enhancing its overall performance.

[0054] Optionally, in step S2 above, the design organic solution is applied to the pixel openings of the pixel defining layer of the display panel by inkjet printing to form a nanowire structure. This includes: when the block polymer is a rigid-rigid block polymer, after the design organic solution is applied to the pixel openings by inkjet printing, the intermediate display panel with the design organic solution is baked to obtain the nanowire structure; the different rigid segments in the rigid-rigid block polymer have a design mass ratio.

[0055] Optionally, the different rigid segments in the rigid-rigid block polymer have a designed mass ratio, or relative molecular mass ratio. Here, a rigid segment, also called a hard segment, refers to a segment with a certain degree of rigidity.

[0056] Because the chemical bonds between different rigid polymers in rigid-rigid block polymers are affected by the presence of phase interfaces, microphase separation can only occur at the microscopic chain scale, ultimately forming nanowire structures. This improves the roughness of the display panel, suppresses changes in pinning points, enhances the film thickness uniformity of the display panel, and simultaneously increases the carrier injection capability of the display panel.

[0057] Optionally, the designed mass ratio of different rigid segments in the rigid-rigid block polymer ranges from 56 / 44 to 83 / 17. Optionally, the designed mass ratio includes 56 / 44 and 83 / 17.

[0058] Optionally, when the block polymer is a rigid-rigid block polymer, the baking temperature range for the intermediate display panel with the designed organic solution is 35°C–240°C. Optionally, the baking temperature includes 35°C and 240°C. At a baking temperature range of 35°C–240°C and a designed mass ratio of 56 / 44–83 / 17, the rigid-rigid block polymer undergoes microphase separation, and different rigid polymers aggregate to form nanowire structures.

[0059] When the rigid-rigid block polymer is P3HT-b-P3EHT, the first solvent is chlorobenzene solution. The P3HT-b-P3EHT is dissolved in the chlorobenzene solution to form a design organic solution. In the P3HT-b-P3EHT, the design mass ratio of the rigid segments of P3HT and P3EHT, i.e., the relative molecular mass ratio, is 56:44, and or, the design mass ratio of the rigid segments of P3HT and P3EHT, i.e., the relative molecular mass ratio, is preferably 83:17. The temperature range for baking the display panel having the design organic solution containing P3HT-b-P3EHT is 200-240°C, and the nano-wire structure is obtained after baking. The P3HT-b-P3EHT is poly(3-hexylthiophene)-b-poly(3-(2'-ethyl)hexylthiophene).

[0060] When the rigid-rigid block polymer is P3HT-b-P3HHT, the first solvent is a methanol / pyridine mixed solvent. The P3HT-b-P3HHT is dissolved in the methanol / pyridine mixed solvent to form a design organic solution. In the P3HT-b-P3HHT, the design mass ratio of the rigid segments of P3HT and P3HHT is 74:26.

[0061] When the rigid-rigid block polymer is P3HT-b-P3PT, the first solvent is an o-dichlorobenzene / chloroform mixed solvent. The P3HT-b-P3PT is dissolved in the o-dichlorobenzene / chloroform mixed solvent to form a design organic solution; the design organic solution containing P3HT-b-P3PT is dried in a vacuum environment and then baked at a baking temperature of 150°C to form a nano-wire structure. The nano-wire structure is a fibrous nano-wire structure.

[0062] When the rigid-rigid block polymer is P3BT-b-P3HT, the first solvent is an anisole / chloroform solution. The P3BT-b-P3HT is dissolved in the anisole / chloroform solution to form a design organic solution. The design organic solution containing P3BT-b-P3HT is arranged in the pixel opening in an inkjet printing manner, and is baked at an environment of 35-50°C to obtain a nano-wire structure. The P3BT-b-P3HT is poly(3-butylthiophene)-b-poly(3-hexyl-thiophene).

[0063] Optionally, the intermediate display panel having the design organic solution is baked to obtain a nano-wire structure, including: when the rigid-rigid block polymer is P3HT-b-P3HHT, the intermediate display panel having the design organic solution is arranged in an environment of 200°C for annealing for 1h to obtain a nano-wire structure. The nano-wire structure is a fibrous structure. The P3HT-b-P3HHT is poly(3-hexylthiophene)-b-poly(3-(6-hydroxy)hexylthiophene).

[0064] Optionally, in the embodiment, the block polymer is added into the first solvent or the second solvent to form the design organic solution, comprising: the rigid-flexible block polymer is added into the second solvent, and after adding the poor solvent, the organic solution is formed, so that the rigid-flexible block polymer in the organic solution is self-assembled to form the preliminary nanowire structure. The block polymer comprises the rigid-flexible block polymer; the poor solvent comprises a 90% methanol solution by volume.

[0065] When the rigid-flexible block polymer is PF-b-PAA, the second solvent is chloroform solution. The PF-b-PAA is dissolved in the chloroform solution, and a 90% methanol solution by volume is added, and finally the design organic solution is formed. The PF-b-PAA in the design organic solution is self-assembled to form the preliminary nanowire structure. The 90% methanol solution by volume means that the volume ratio of methanol to water is 90:100.

[0066] Optionally, the first solvent comprises a methanol / pyridine mixed solvent or a benzoic anhydride / chloroform mixed solvent; the volume ratio of methanol to pyridine in the methanol / pyridine mixed solvent is 20:80; the volume ratio of benzoic anhydride to chloroform in the benzoic anhydride / chloroform mixed solvent is less than or equal to 2:1. It is helpful for the rigid-rigid block polymer to be dissolved in the first solvent to form the nanowire structure in the baking process.

[0067] Optionally, the block polymer is added into the first solvent or the second solvent to form the design organic solution, comprising: when the rigid-flexible block polymer is OFPHM, the OFPHM and the ethanol solution form the design organic solution with an increased concentration of 0.125wt%; when the rigid-flexible block polymer is PF-b-PAA, the PF-b-PAA and the chloroform solution form a mixed solution with a volume ratio of 10%, and after adding the poor solvent, the design organic solution is formed; the second solvent comprises an ethanol solution or a chloroform solution. The volume ratio of PF-b-PAA to chloroform is 1:10.

[0068] When the rigid-flexible block polymer is OFPHM, the second solvent is an ethanol solution. The mass of OFPHM accounts for 0.125wt% of the total mass of OFPHM and the ethanol solution. After the design organic solution containing OFPHM is arranged in the pixel opening of the pixel defining layer of the middle display panel in the form of inkjet printing, the nanowire structure is formed after drying. The "wt%" in the embodiment is the mass concentration, that is, the mass of the polymer / (mass of the polymer+mass of the solvent).

[0069] The molecular formula of OFPHM is:

[0070]

[0071] A is a rigid block polymer, and B is a flexible block polymer.

[0072] Based on the same inventive concept, the embodiment of the present application provides a display panel manufactured based on the display panel manufacturing method. Figure 4 As shown in the figure, the display panel comprises a substrate 10, a thin film transistor layer 11, a pixel definition layer 12, and a plurality of light emitting units.

[0073] The thin film transistor layer 11 is arranged on one side of the substrate 10.

[0074] The pixel definition layer 12 is arranged on the side of the thin film transistor layer 11 away from the substrate 10, and the pixel definition layer 12 comprises a plurality of pixel openings.

[0075] The plurality of light emitting units are arranged in the plurality of pixel openings one by one, and the light emitting unit comprises an anode 113, a first film layer 13, a light emitting layer 15, and a cathode 17 arranged in sequence away from the substrate 10; the first film layer 13 comprises a nanowire structure.

[0076] The thin film transistor layer 11 comprises a source-drain electrode 111, an interlayer dielectric layer 112, and the anode 113.

[0077] Optionally, at least one of a hole injection layer 14 and a hole transport layer 14 is arranged between the first film layer 13 and the light emitting layer 15.

[0078] At least one of an electron injection layer 16 and an electron transport layer 16 is arranged between the cathode 17 and the light emitting layer 15.

[0079] Optionally, the material of the hole injection layer 14 is any one of the following: PEDOT:PSS, PFI (perfluoro ionomer) doped PEDOT:PSS, a polyaniline and PEDOT:PSS mixture.

[0080] The material of the hole transport layer 14 is any one of the following: based on a propylene oxide system, TPD (N-N'-diphenyl-N-N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine), QUPD (N-N'-di(4-(6-(3-oxabicyclo-3-yl)methoxy)-ethoxy)phenyl-N-N'-di(4-methoxyphenyl) biphenyl-4,4'-diamine), based on a styrene system, VB (vinylbenzyl)-TCTA (4,4',4''-tris-(N-carbazolyl)-triphenylamine), PFCB (perfluorocyclobutane).

[0081] PEDOT:PSS is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid).

[0082] Optionally, the light-emitting layer 15 comprises first color light-emitting structures, second color light-emitting structures and third color light-emitting structures; the material of the third color light-emitting structures is any one of polyfluorene and S,S-dioxy-dibenzothiophene; the material of the first color light-emitting structures is methoxyisooctyloxy; and the material of the second color light-emitting structures is poly-p-phenylenevinylene.

[0083] The material of the light-emitting layer 15 is divided into first color light-emitting structures, second color light-emitting structures and third color light-emitting structures according to different light-emitting structures. The first color light-emitting structures, the second color light-emitting structures and the third color light-emitting structures are red, blue and green, for example, the first color light-emitting structures can be red, the second color light-emitting structures can be blue, and the third color light-emitting structures can be green, or the first color light-emitting structures can be blue, the second color light-emitting structures can be green, and the third color light-emitting structures can be red, or the first color light-emitting structures can be red, the second color light-emitting structures can be green, and the third color light-emitting structures can be blue, or other combinations, as long as the first color light-emitting structures, the second color light-emitting structures and the third color light-emitting structures are one of red, green and blue, respectively.

[0084] By applying the embodiments of the present application, the following beneficial effects can be achieved at least:

[0085] By using the microphase separation of rigid-rigid block polymers and the self-assembly characteristics of rigid-flexible block polymers, the organic design solution containing the block polymers is placed in the pixel opening in an inkjet printing manner. In the subsequent drying process such as baking, the block polymers form a first film layer containing nanowire structures. The nanowire structures increase the surface roughness of the droplets of the design organic solution in the pixel opening, thereby increasing the roughness of the surface of the light-emitting layer. The pinning point change can be inhibited, the capillary flow effect of the droplets from inside to outside can be inhibited, the coffee ring effect can be reduced, and the film thickness uniformity of the light-emitting layer can be improved.

[0086] Moreover, in the drying process of the design organic solution, the block polymers form nanowire structures in the form of self-assembly, which saves additional assembly operations or steps and can simplify the manufacturing process. The nanowire structures are smaller in size than the structures formed after drying of the solution in the related art, and do not need to add additional active agents, which is beneficial to improve the carrier injection performance of the display panel and improve the performance of the display panel.

[0087] Those skilled in the art can understand that the steps, measures, and schemes in various operations, methods, and processes discussed in the present application can be alternated, changed, combined, or deleted. Further, other steps, measures, and schemes in various operations, methods, and processes discussed in the present application can also be alternated, changed, rearranged, decomposed, combined, or deleted. Further, steps, measures, and schemes in various operations, methods, and processes in the prior art can also be alternated, changed, rearranged, decomposed, combined, or deleted.

[0088] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0089] The terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0090] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements inside. 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.

[0091] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0092] It should be understood that although the steps in the flowcharts of the drawings are shown in a sequential order following the arrows, the steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated otherwise herein, the execution of the steps is not strictly limited to the order indicated by the arrows, and can be executed in other orders. Moreover, at least some of the steps in the flowcharts of the drawings can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of which is not necessarily sequential, but can be round-robin or alternating with at least some of the other steps or sub-steps or stages of other steps.

[0093] The above only describes some embodiments of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A manufacturing method of a display panel, characterized by, The method comprises the following steps: adding a block polymer into a first solvent or a second solvent to form a design organic solution; setting the design organic solution to pixel openings of a pixel defining layer of an intermediate display panel in an inkjet printing manner to form a first film layer containing nanowire structures; then forming a light-emitting layer on the first film layer; wherein the block polymer comprises at least one of a rigid-flexible block polymer and a rigid-rigid block polymer; the rigid-rigid block polymer is selected from one of poly(3-butylthiophene)-b-poly(3-hexylthiophene), poly(3-hexylthiophene)-b-poly(3-(2'-ethyl)hexylthiophene, poly(3-hexylthiophene)-b-poly(3-(6-hydroxy)hexylthiophene), and poly(3-hexylthiophene)-b-poly(3-pentylthiophene); the rigid-flexible block polymer is selected from one of poly[2,7-(9,9-dihexylfluorene)]-b-polyacrylic acid and OFPHM; the molecular formula of OFPHM is: the first solvent is any one of chlorobenzene solution, methanol / pyridine mixed solvent, anisole / chloroform mixed solvent, and o-dichlorobenzene / chloroform mixed solvent; the second solvent is any one of chloroform solution and ethanol solution.

2. The method of manufacturing a display panel according to claim 1, wherein The method for manufacturing the display panel comprises the following steps: when the block polymer is the rigid-rigid block polymer, after the design organic solution is set to the pixel openings in the inkjet printing manner, the intermediate display panel with the design organic solution is baked to obtain the nanowire structures.

3. The method of manufacturing a display panel according to claim 2, wherein The method comprises at least one of the following: the design mass ratio of different rigid segments in the rigid-rigid block polymer exists; the range of the design mass ratio comprises 56 / 44-83 / 17; the temperature range of the baking is 35-240°C.

4. The method of manufacturing a display panel according to claim 2, wherein The method for manufacturing the display panel comprises the following steps: when the rigid-rigid block polymer is P3HT-b-P3HHT, the intermediate display panel with the design organic solution is set in a 200°C environment to be annealed for 1h to obtain the nanowire structures; P3HT-b-P3HHT is poly(3-hexylthiophene)-b-poly(3-(6-hydroxy)hexylthiophene).

5. The method of manufacturing a display panel according to claim 1, wherein The method comprises the following steps: adding a rigid-flexible block polymer into the second solvent and mixing with a poor solvent to form the design organic solution, so that the rigid-flexible block polymer in the design organic solution is self-assembled to form preliminary nanowire structures; the block polymer comprises the rigid-flexible block polymer; the poor solvent comprises 90% methanol solution by volume.

6. The method for manufacturing the display panel according to claim 1, wherein: the first solvent comprises methanol / pyridine mixed solvent or anisole / chloroform mixed solvent; the volume ratio of methanol to pyridine in the methanol / pyridine mixed solvent is 20:

80. The volume ratio of anisole to chloroform in the mixed solvent of anisole and chloroform is less than or equal to 2:

1.

7. The manufacturing method of a display panel according to claim 1, wherein The block polymer is added to the first solvent or the second solvent to form the design organic solution, including: When the rigid-flexible block polymer is OFPHM, the OFPHM and the ethanol solution form the design organic solution with an increased concentration of 0.125wt%; When the rigid-flexible block polymer is PF-b-PAA, the PF-b-PAA and the chloroform solution form a mixed solution with a volume ratio of 10%, and the design organic solution is formed after adding a poor solvent; the poor solvent includes a methanol solution with a volume ratio of 90%; the PF-b-PAA is poly[2,7-(9,9-dihexylfluorene)]-b-poly(acrylic acid); The second solvent includes an ethanol solution or a chloroform solution.

8. A display panel, characterized by, The display panel is manufactured based on the manufacturing method of the display panel according to any one of claims 1-7, The display panel includes: a substrate substrate; a thin film transistor layer arranged on one side of the substrate substrate; a pixel definition layer arranged on a side of the thin film transistor layer away from the substrate substrate; the pixel definition layer includes a plurality of pixel openings; a plurality of light emitting units arranged one by one in the plurality of pixel openings; the light emitting unit includes, in sequence away from the substrate substrate, an anode, a first film layer, a light emitting layer, and a cathode; the first film layer includes a nanowire structure.

9. The display panel of claim 8, wherein, At least one of a hole injection layer and a hole transport layer is arranged between the first film layer and the light emitting layer; The material of the hole injection layer is any one of the following: PEDOT:PSS, PFI (perfluoro ionomer) doped PEDOT:PSS, polyaniline and PEDOT:PSS mixture; PEDOT:PSS is poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid); The material of the hole transport layer is any one of the following: based on propylene oxide system, TPD (N-N'-diphenyl-N-N'-di(3-methylphenyl)-1,1'-diphenyl-4,4'-diamine), QUPD (N-N'-di(4-(6-(3-oxabicyclo-3-yl)methoxy)-ethoxy)phenyl-N-N'-di(4-methoxyphenyl) diphenyl-4,4'-diamine), based on styrene system, VB (vinylbenzyl)-TCTA (4,4',4"-tris-(N-carbazolyl)- triphenylamine), PFCB (perfluorocyclobutane).

10. The display panel of claim 8, wherein, Further comprising at least one of the following: The light emitting layer includes a first color light emitting structure, a second color light emitting structure, and a third color light emitting structure; the material of the third color light emitting structure is any one of the following: polyfluorene, S,S-dioxo-dibenzothiophene; the material of the first color light emitting structure is methoxyisooctyloxy; and the material of the second color light emitting structure is poly-p-phenylenevinylene.

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