Display panel, manufacturing method of display panel and display device

Abstract

The invention discloses a display panel, a manufacturing method of the display panel and a display device, and belongs to the technical field of display. The display panel comprises a substrate and a plurality of light-emitting units, each light-emitting unit comprises a first electrode, a quantum dot light-emitting layer and a second electrode which are sequentially arranged in the direction away from the substrate, and the light-emitting units comprise a first light-emitting unit and a second light-emitting unit which emit light of different colors. The specified angles of the first electrodes corresponding to the first light-emitting units and the second light-emitting units are different, so that when the quantum dot light-emitting layers of the first light-emitting units are formed, the upper surfaces of the first electrodes of the second light-emitting units are relatively inclined; therefore, the residual quantity of the quantum dot light-emitting layer of the first light-emitting unit on the first electrode of the second light-emitting unit can be reduced, and the problem of cross color can be solved.

Description

Display panel, method for manufacturing display panel, and display device Technical Field

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

[0002] A display panel is a device with display function.

[0003] A display panel includes a base substrate and light-emitting units of multiple colors. Each light-emitting unit includes a first electrode, a quantum dot light-emitting layer, and a second electrode stacked in sequence away from the base substrate. The light-emitting units of different colors include quantum dot light-emitting layers of different colors. Forming the quantum dot light-emitting layer of a single color includes forming a quantum dot material layer of a single color on the first electrodes of the light-emitting units of multiple colors, and removing excess quantum dot material to form the quantum dot light-emitting layer of the single color in the light-emitting unit.

[0004] However, in the process of forming the quantum dot light-emitting layer, the excess quantum dot material layer is not completely removed, resulting in the quantum dots being easily left, thereby causing the problem of cross-color.

[0005] Summary of the Invention

[0006] Embodiments of the present application provide a display panel, a method for manufacturing a display panel, and a display device. The display panel includes:

[0007] According to one aspect of the present application, a display panel is provided, comprising:

[0008] substrate;

[0009] a plurality of light-emitting units, each of the light-emitting units comprising a first electrode, a quantum dot light-emitting layer, and a second electrode sequentially arranged in a direction away from the substrate, the plurality of light-emitting units comprising a first light-emitting unit and a second light-emitting unit emitting light of different colors;

[0010] The first light emitting unit and the second light emitting unit each correspond to a first electrode with a different designated angle, and the designated angle is the angle between the upper surface of the first electrode away from the base substrate and the base substrate.

[0011] Optionally, the first electrode of the first light-emitting unit is a horizontal electrode, the specified angle of the horizontal electrode is zero, and the first electrode of the second light-emitting unit is an inclined electrode, the specified angle of the inclined electrode is greater than zero.

[0012] Optionally, a lower surface of the first electrode close to the base substrate is parallel to the base substrate.

[0013] Optionally, a lower surface of the first electrode close to the base substrate is parallel to an upper surface of the first electrode away from the base substrate;

[0014] The display panel also includes an auxiliary layer, which is located between the base substrate and the light-emitting unit. The side of the auxiliary layer away from the base substrate includes multiple inclined structures, the positions of the inclined structures correspond to the positions of the light-emitting units, and the upper surface of the inclined structure away from the base substrate has an angle greater than zero with the plane parallel to the base substrate. The inclined electrode contacts the upper surface of the inclined structure.

[0015] Optionally, the light-emitting unit further includes a third light-emitting unit, and the designated angle of the first electrode of the third light-emitting unit is different from the designated angles of the first electrodes of the first light-emitting unit and the second light-emitting unit.

[0016] Optionally, the designated angle of the first electrode of the first light-emitting unit is a first designated angle, the designated angle of the first electrode of the second light-emitting unit is a second designated angle, the designated angle of the first electrode of the third light-emitting unit is zero, and the first designated angle is different from the second designated angle.

[0017] Optionally, the range of the first specified angle θ1 is: 5 degrees<θ1<25 degrees, and the range of the second specified angle θ2 is: 10 degrees<θ2<30 degrees.

[0018] Optionally, the display panel further includes a plurality of light output structures, the plurality of light output structures respectively corresponding to the plurality of inclined electrodes, and the orthographic projections of the light output structures on the base substrate overlap with the orthographic projections of the corresponding inclined electrodes on the base substrate, the orthographic projections of the plurality of light output structures on the base substrate are located outside the orthographic projections of the horizontal electrodes on the base substrate, and the refractive index of the light output structure is greater than the refractive index of the second electrode.

[0019] Optionally, the refractive index of the light output structure is negatively correlated with the target angle of the corresponding inclined electrode, and the target angle of the inclined electrode is the degree of the acute angle between the upper surface of the inclined electrode away from the substrate and the target plane, the target plane is perpendicular to the substrate, and the intersection of the target plane and the upper surface is parallel to the substrate.

[0020] Optionally, the specified angles of the first electrodes of the light-emitting units are all less than 30 degrees, and the difference between the specified angles of the first electrodes of any two of the first light-emitting unit, the second light-emitting unit and the third light-emitting unit is greater than 5 degrees.

[0021] In another aspect, a method for manufacturing a display panel is provided, the method comprising:

[0022] obtaining a substrate;

[0023] forming a plurality of light-emitting units on the base substrate, each of the light-emitting units comprising a first electrode, a quantum dot light-emitting layer, and a second electrode sequentially arranged in a direction away from the base substrate, and the plurality of light-emitting units comprising a first light-emitting unit and a second light-emitting unit emitting light of different colors;

[0024] The first electrodes corresponding to the first light-emitting unit and the second light-emitting unit have different specified angles, and the specified angle is the degree of the angle between the upper surface of the first electrode away from the base substrate and the base substrate, and the quantum dot light-emitting layer is in contact with the upper surface of the first electrode away from the base substrate.

[0025] Optionally, forming a plurality of light-emitting units on the base substrate includes:

[0026] forming first electrodes of the plurality of light-emitting units on the base substrate, the plurality of light-emitting units including a first light-emitting unit and a second light-emitting unit emitting light of different colors, the first electrodes corresponding to the first light-emitting unit and the second light-emitting unit having different designated angles, the first electrode of the first light-emitting unit being a horizontal electrode, the designated angle of the horizontal electrode being zero, and the first electrode of the second light-emitting unit being an inclined electrode, the designated angle of the inclined electrode being greater than zero;

[0027] Adjusting the base substrate so that the inclined electrode is away from the upper surface of the base substrate and parallel to the horizontal plane;

[0028] forming a quantum dot material layer of a first color on a side of the first electrodes of the plurality of light-emitting units away from the base substrate;

[0029] The quantum dot material layer of the first color on the first electrodes other than the inclined electrode is removed.

[0030] Optionally, before forming the first electrode on the substrate, the method further includes:

[0031] forming an auxiliary layer on the base substrate;

[0032] A plurality of inclined structures are formed on a side of the auxiliary layer away from the base substrate, wherein the positions of the inclined structures correspond to the positions of the light-emitting units, and an angle greater than zero is formed between the upper surface of the inclined structure away from the base substrate and a plane parallel to the base substrate, and the inclined electrode contacts the upper surface of the inclined structure.

[0033] On the other hand, a display device is provided, comprising a housing and any one of the above-mentioned display panels, wherein the display panel is located in the housing.

[0034] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0035] A display panel is provided, comprising a substrate and a plurality of light-emitting units. The light-emitting units include a first electrode, a quantum dot light-emitting layer, and a second electrode, arranged sequentially in a direction away from the substrate. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit that emit light of different colors. The first electrodes corresponding to the first and second light-emitting units are each provided at a different designated angle. Thus, when the quantum dot light-emitting layer of the first light-emitting unit is formed, the upper surface of the first electrode of the second light-emitting unit is relatively inclined. This reduces the amount of residual quantum dot light-emitting layer of the first light-emitting unit on the first electrode of the second light-emitting unit, thereby improving cross-color issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] FIG1 is a schematic structural diagram of a display panel during manufacturing;

[0038] FIG2 is a schematic diagram of a top view of a display panel provided in an embodiment of the present application;

[0039] FIG3 is a schematic cross-sectional view of the display panel provided in FIG2 ;

[0040] FIG4 is a schematic diagram of the distribution of quantum dots of a display panel and a corresponding schematic diagram of the cross-sectional structure;

[0041] FIG5 is a schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0042] FIG6 is a schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0043] FIG7 is a schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0044] FIG8 is a schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0045] FIG9 is a schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0046] FIG10 is a schematic cross-sectional view of a portion of the display panel shown in FIG9 ;

[0047] FIG11 is a flow chart of a method for manufacturing a display panel according to an embodiment of the present application;

[0048] FIG12 is a flow chart of another method for manufacturing a display panel provided in an embodiment of the present application;

[0049] FIG13 is a schematic diagram of a process for preparing an inclined electrode in a display panel provided in an embodiment of the present application;

[0050] FIG14 is a schematic diagram of a process for preparing a quantum dot light-emitting layer in a display panel provided in an embodiment of the present application;

[0051] FIG15 is a schematic diagram of the distribution of quantum dots of another display panel and a corresponding schematic diagram of the cross-sectional structure.

[0052] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0054] In this application, for convenience, words and phrases indicating orientation or positional relationships, such as "middle," "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inside," and "outside," are used to illustrate the positional relationships of constituent elements with reference to the accompanying drawings. This is merely for the purpose of facilitating the description of this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. The positional relationships of constituent elements may be appropriately changed depending on the direction in which the constituent elements are described. Therefore, the words and phrases are not limited to those described in the specification and may be appropriately replaced according to the circumstances.

[0055] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0056] As used in this application, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 10% of either one.

[0057] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0058] This application describes exemplary embodiments with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0059] In this application, circles, triangles, rectangles, trapezoids, pentagons or hexagons are not in the strict sense, but can be approximate circles, triangles, rectangles, trapezoids, pentagons or hexagons, etc. There may be some small deformations caused by tolerances, and there may be chamfers, arc edges and deformations.

[0060] Please refer to Figure 1, which is a structural diagram of a display panel during the manufacturing process. The display panel 30 includes: a base substrate 31 and multiple light-emitting units 32, the light-emitting units 32 include a first electrode 321 located on the base substrate 31 and a quantum dot light-emitting layer 322, the multiple light-emitting units 32 include multiple types of light-emitting units 32: a first type of light-emitting unit C1, a second type of light-emitting unit C2 and a third type of light-emitting unit C3, and the multiple types of light-emitting units 32 respectively include quantum dot light-emitting layers 322 of multiple colors of light.

[0061] Figure 1 shows a schematic structural diagram of the process for forming a first quantum dot light-emitting layer 3221 of a first-type light-emitting unit C1. The process for forming the first quantum dot light-emitting layer 3221 includes forming the first quantum dot light-emitting layer 3221 on the first electrodes 221 of multiple types of light-emitting units 22, and then removing the first quantum dot light-emitting layer 3221 from all first electrodes 121 other than the first electrode 121 of the first-type light-emitting unit C1. Because the first electrodes 321 shown in Figure 1 are parallel to the substrate 31, quantum dots from the first quantum dot light-emitting layer 3221 are likely to remain on the first electrodes 321 of the second-type light-emitting units C2 and the third-type light-emitting units C3. This increases the amount of residual quantum dots of different colors, which can lead to cross-color issues. Different-color quantum dots are quantum dots that emit light of a different color than the quantum dot light-emitting layer 322.

[0062] An embodiment of the present application provides a display panel. Please refer to FIG. 2 and FIG. 3 . FIG. 2 is a schematic diagram of a top view of a display panel provided in an embodiment of the present application. FIG. 3 is a schematic diagram of a cross-sectional structure of the display panel provided in FIG. 2 ( FIG. 3 may be a schematic diagram of a cross-sectional structure of the display panel provided in FIG. 2 at line E1-E1). The display panel 10 includes:

[0063] Base substrate 11.

[0064] Multiple light-emitting units 12, each light-emitting unit 12 includes a first electrode 121, a quantum dot light-emitting layer 122 and a second electrode 123 arranged in sequence along a direction away from the base substrate 11, and the multiple light-emitting units 12 include a first light-emitting unit A1 and a second light-emitting unit A2 that emit light of different colors.

[0065] The first light emitting unit A1 and the second light emitting unit A2 have different designated angles of the first electrodes 121 . The designated angle is the angle between the upper surface of the first electrode 121 away from the base substrate 11 and a plane Q parallel to the base substrate 11 .

[0066] FIG3 shows that the acute angles between the upper surfaces of the first electrodes 121 of the first light-emitting unit A1 and the second light-emitting unit A2 and a plane parallel to the substrate 11 are the same in degree, but the tilt directions are different. In this case, the first specified angle θ1 and the second specified angle θ2 are different. Therefore, in the embodiment of the present application, the angle between the upper surface of the first electrode 121 and the substrate 11 can be: starting from the plane parallel to the substrate 11 and rotating in a clockwise direction to the upper surface of the first electrode 121.

[0067] It should be noted that the display panel 10 shown in FIG3 also includes a third light-emitting unit A3. The display panel 10 may also include more than three types of light-emitting units 12, which is not limited in this embodiment of the present application. Among the three types of light-emitting units 12, there may be a situation as shown in FIG3: the first specified angle θ1 of the first electrode 121 of the first light-emitting unit A1 is different from the second specified angle θ2 of the first electrode 121 of the second light-emitting unit A2, and the third specified angle θ3 of the first electrode 121 of the third light-emitting unit A3 is the same as the first specified angle θ1 of the first electrode 121 of the first light-emitting unit A1. Other situations may also exist, for example, the first specified angle θ1, the second specified angle θ2, and the third specified angle θ3 are all different, which is not limited in this embodiment of the present application. In addition, the light-emitting unit 12 may include at least one of a circular, an elliptical, or a square shape, which is also not limited in this embodiment of the present application.

[0068] In summary, the embodiments of the present application provide a display panel comprising a substrate and a plurality of light-emitting units. The light-emitting units include a first electrode, a quantum dot light-emitting layer, and a second electrode, which are sequentially arranged in a direction away from the substrate. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit that emit light of different colors. The first electrodes corresponding to the first and second light-emitting units are each provided at a different designated angle. Thus, when the quantum dot light-emitting layer of the first light-emitting unit is formed, the upper surface of the first electrode of the second light-emitting unit is relatively tilted, thereby reducing the amount of residual light from the quantum dot light-emitting layer of the first light-emitting unit on the first electrode of the second light-emitting unit, thereby improving the problem of cross-color.

[0069] In addition, precisely because the specified angles of the first electrodes corresponding to the first light-emitting unit and the second light-emitting unit are different, the first electrodes corresponding to the first light-emitting unit and the second light-emitting unit are relatively tilted, and the quantum dot light-emitting layer located on the tilted first electrode is easy to remove, thereby reducing the residual amount of quantum dots of different colors from the quantum dot light-emitting layer.

[0070] The display panel provided in the embodiment of the present application can be a quantum dot light emitting diode (QLED) display panel. The quantum dot light emitting diode display panel has the advantages of high color gamut, self-luminescence, low starting voltage, fast response speed, and long life.

[0071] In the quantum dot material of the embodiment of the present application, the quantum dot body and the coordination group in the quantum dot ligand are connected by chemical bonds.

[0072] The quantum dot bodies include: any one of group IIB-VIA quantum dots, group IIIA-VA quantum dots, group IVA-VIA quantum dots, core-shell quantum dots and ABX3 type perovskite quantum dots. In ABX3 type perovskite quantum dots, A is CH3NH3 + (methylamine), NH2CH=NH2(formamidine) and Cs + One or more of, B is Pb 2+ and Sn 2+ One or two of the following, X is Cl - Br - and I - One or more of the ABX3 type perovskite quantum dots include CH3NH3PbBr3, CH3NH3PbCl3, CH3NH3PbI3, CsPbBr3, CsPbCl3 and CsPbI3.

[0073] Exemplarily, the IIB-VIA group quantum dots are selected from: binary compounds such as one or more of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, and MgS; ternary compounds such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZn Te, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, or mixtures thereof; and quaternary compounds such as HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, or mixtures thereof, but are not limited thereto.

[0074] The IIIA-VA group quantum dots are selected from: binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, or mixtures thereof; ternary compounds such as GaNPs, GaNAs, GaNSb, GaPAs, GaPSb, AlNPs, AlNAs, AlNSb, AlPAs, AlPSb, InNPs, InNAs, InNSb, InPAs, InPSb, or mixtures thereof; and quaternary compounds such as GaAlNPs, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNPs, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNPs, InAlNAs, InAlNSb, InAlPAs, InAlPSb, or mixtures thereof, but are not limited thereto.

[0075] Group IVA-VIA quantum dots are selected from, but are not limited to, binary compounds such as SnS, SnSe, SnTe, PbS, PbSe, PbTe, or mixtures thereof; ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, or mixtures thereof; and quaternary compounds such as SnPbSSe, SnPbSeTe, SnPbSTe, or mixtures thereof. Group IVA-VIA quantum dots are selected, for example, from elemental (mono) semiconductors such as Si, Ge, or mixtures thereof; and binary semiconductor compounds such as SiC, SiGe, and mixtures thereof.

[0076] Core-shell quantum dots are structures where one material is the core and the other is the shell. For example, a CdS / ZnS quantum dot is a quantum dot where the core is CdS and the shell is ZnS.

[0077] In some other embodiments, the quantum dot bodies may be other nanoscale materials, such as nanorods, nanosheets, etc. The components of other nanoscale materials may include at least one of CdS, CdSe, CdTe, ZnSe, InP, PbS, CuInS2, ZnO, CsPbCl3, CsPbBr3, CsPhI3, CdS / ZnS, CdSe / ZnS, ZnSe, InP / ZnS, PbS / ZnS, InAs, InGaAs, InGaN, GaNk, ZnTe, Si, Ge, and C.

[0078] For example, the quantum dot body can include cadmium (Cd)-free quantum dots. Cadmium-free quantum dots are quantum dots that do not include cadmium (Cd). Cadmium (Cd) can cause serious environmental / health problems, so non-cadmium-based quantum dots can be effectively used.

[0079] The quantum dot light-emitting layer can be formed by a film forming process and a patterning process. In the embodiment of the present application, the patterning process involved may include photoresist coating, exposure, development, etching and photoresist stripping. Since the film forming process and the development process of the quantum dot light-emitting layer both involve a spin coating process, during the spin coating process, the centrifugal force makes it easier for the quantum dots on the inclined surface to be thrown out, so that the inclined surface can effectively reduce the residual amount of quantum dots. Please refer to Figure 4, which is a schematic diagram of the distribution of quantum dots of a display panel and a corresponding cross-sectional structure diagram (the schematic diagram of the distribution of quantum dots is the D1 area shown in Figure 4, and the cross-sectional structure diagram is the D2 area shown in Figure 4, and the D2 area can be a cross-sectional structure diagram of the D1 area at E2-E2). Among them, the base substrate 11 includes a first area B1, the upper surface of the base substrate 11 of the first area B1 is a plane, the first electrode 121 includes a second area B2 and a third area B3, the upper surface of the first electrode 121 of the second area B2 is an inclined surface, and the upper surface of the first electrode 121 of the third area B3 is a plane. In the schematic diagram of quantum dot distribution shown in FIG4 , the residual amount of quantum dots in the second region B2 is less than that in the first region B1 and the third region B3 . This shows that the inclined surface can effectively reduce the residual amount of quantum dots.

[0080] Referring to Figure 3, when forming the quantum dot light-emitting layer of the first light-emitting unit A1, the posture of the base substrate 11 can be adjusted so that the first electrode 121 of the first light-emitting unit A1 is away from the upper surface of the base substrate 11 and parallel to the horizontal plane, thereby improving the thickness uniformity of the quantum dot light-emitting layer 122 of the first light-emitting unit A1. Because the designated angle θ1 of the first electrode 121 of the first light-emitting unit A1 differs from the designated angle θ2 of the first electrode 121 of the second light-emitting unit A2, the upper surface of the first electrode 121 of the second light-emitting unit A2 is tilted during the formation of the quantum dot light-emitting layer 122 of the first light-emitting unit A1. This tilted surface effectively reduces the amount of residual quantum dots, thereby reducing the amount of quantum dots in the quantum dot light-emitting layer 122 of the first light-emitting unit A1 that remain on the first electrode 121 of the second light-emitting unit A2, thereby improving the problem of cross-color caused by different-colored quantum dots.

[0081] In an exemplary embodiment, the first electrode of the first light-emitting unit can be a horizontal electrode, and the specified angle of the horizontal electrode is zero. The first electrode of the second light-emitting unit is an inclined electrode, and the specified angle of the inclined electrode is greater than zero, which can simplify the process. Please refer to Figure 5, which is a schematic diagram of the cross-sectional structure of another display panel provided in an embodiment of the present application. The display panel 10 includes: a base substrate 11 and a light-emitting unit 12. Among them, the base substrate 11 can be used to carry other film layers in the display panel 10. The base substrate 11 may include a hard substrate, or a flexible substrate. Exemplarily, the hard substrate may include a glass substrate, and the flexible substrate may include a polyimide (PI) substrate.

[0082] The light-emitting unit 12 includes a first electrode 121, a quantum dot light-emitting layer 122, and a second electrode 123, which are sequentially arranged in a direction away from the base substrate 11. The first electrode 121 cooperates with the second electrode 123 to drive the quantum dot light-emitting layer 122 to emit light. The first electrode 121 can be an anode, and the second electrode 123 can be a cathode. Exemplarily, the material of the first electrode 121 can include indium tin oxide (ITO), and the material of the second electrode 123 can include a metal material.

[0083] The light-emitting unit 12 includes a first light-emitting unit A1, a second light-emitting unit A2, and a third light-emitting unit A3. The quantum dot light-emitting layers 122 included in the first light-emitting unit A1, the second light-emitting unit A2, and the third light-emitting unit A3 emit light of different colors. For example, the first light-emitting unit A1 includes a red quantum dot light-emitting layer, the second light-emitting unit A2 includes a green quantum dot light-emitting layer, and the third light-emitting unit A3 includes a blue quantum dot light-emitting layer. The first electrode 121 of the first light-emitting unit A1 is a horizontal electrode, and the designated angle of the horizontal electrode is zero. The first electrodes 121 of the second and third light-emitting units A2 and A3 are inclined electrodes, and the designated angle of the inclined electrodes is greater than zero. The reference horizontal plane of the horizontal and inclined electrodes can be a plane Q parallel to the substrate 11. That is, the horizontal electrode is horizontal relative to plane Q, and the inclined electrode is inclined relative to plane Q. The designated angle is the angle between the upper surface of the first electrode 121, which is away from the substrate 11, and the plane Q parallel to the substrate 11. The designated angle of the first electrode 121 of the second light-emitting unit A2 is the second designated angle θ2, and the designated angle of the first electrode 121 of the third light-emitting unit A3 is the third designated angle θ3. Figure 5 shows the case where the second designated angle θ2 is the same as the third designated angle θ3. In addition, the second designated angle θ2 and the third designated angle θ3 may also be different, and the embodiment of the present application does not limit this.

[0084] By setting the first electrode 121 of the first light-emitting unit A1 as a horizontal electrode, the first electrode 121 of the first light-emitting unit A1 does not need to be tilted in unnecessary steps. The first electrodes 121 of the second light-emitting unit A2 and the third light-emitting unit A3 can also be arranged at different angles to reduce the amount of residual quantum dots, thereby simplifying the process. Furthermore, by setting the first electrode 121 of the first light-emitting unit A1 as a horizontal electrode, the front light emission effect of the display panel 10 can also be improved.

[0085] The structure of the inclined electrode provided in the embodiment of the present application includes a variety of situations. Optionally, the embodiment of the present application can form an inclined electrode by processing the first electrode so that the upper surface of the first electrode away from the base substrate is inclined relative to the base substrate. Referring to Figure 5, the display panel 10 includes: a base substrate 11 and three types of light-emitting units 12. Among the three types of light-emitting units 12, the first electrodes 121 of the second light-emitting unit A2 and the third light-emitting unit A3 are inclined electrodes, and the lower surfaces of the first electrodes 121 of the second light-emitting unit A2 and the third light-emitting unit A3 close to the base substrate 11 are parallel to the base substrate 11. The inclined electrode shown in Figure 5 can be formed by patterning the horizontal electrode using a half-tone mask. Since the half-tone mask is a mask with a partial light-transmitting function, the upper surface of the first electrode 121 away from the base substrate 11 can achieve a gradual etching effect, thereby forming the inclined electrode shown in Figure 5.

[0086] Optionally, the embodiment of the present application can also use other film layers in the display panel to make the upper surface of the first electrode away from the base substrate tilt relative to the base substrate to form an inclined electrode. Please refer to Figure 6, which is a schematic diagram of the cross-sectional structure of another display panel provided in the embodiment of the present application. The display panel 10 includes: a base substrate 11 and three categories of light-emitting units 12. Among the three categories of light-emitting units 12, the first electrodes 121 of the first light-emitting unit A1 and the second light-emitting unit A2 are inclined electrodes, and the lower surface of the first electrode 121 close to the base substrate 11 is parallel to the upper surface of the first electrode 121 away from the base substrate 11.

[0087] The display panel 10 also includes an auxiliary layer 13 and a circuit structure layer 14 (the specific circuit structure is not shown in FIG6 , and the embodiments of the present application are not limited by the specific circuit structure). The circuit structure layer 14 is located on the base substrate 11, and the auxiliary layer 13 is located between the circuit structure layer 14 and the light-emitting unit 12. The side of the auxiliary layer 13 away from the base substrate 11 includes a plurality of inclined structures 131. The upper surface of the inclined structure 131 away from the base substrate 11 has an angle greater than zero with the plane parallel to the base substrate 11, and the inclined electrode contacts the upper surface of the inclined structure 131. The inclined structure 131 shown in FIG6 is an inclined structure that is concave toward the direction close to the base substrate 11. In addition, the inclined structure 131 can also be an inclined structure that is convex toward the direction away from the base substrate 11, and the embodiments of the present application are not limited to this.

[0088] The formation process of the inclined structures 131 includes various methods. For example, the auxiliary layer 13 can be patterned using a halftone mask to form a plurality of inclined structures 131. Since the halftone mask is a mask with a partially light-transmitting function, this can achieve a gradual etching effect on the upper surface of the auxiliary layer 13 away from the base substrate 11, thereby forming the inclined structures 131 shown in FIG. 6 , and furthermore, the first electrode 121 in contact with the upper surface of the inclined structures 131 can be a tilted electrode. In addition, since the material of the auxiliary layer 13 may include a polymer material, the inclined structures 131 can also be formed by pressing the auxiliary layer 13 using a hard template with an inclined surface.

[0089] Optionally, the light-emitting unit further includes a third light-emitting unit, and the designated angle of the first electrode of the third light-emitting unit is different from the designated angles of the first electrodes of the first and second light-emitting units. Please refer to Figure 7, which is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application. The display panel 10 includes: a base substrate 11 and light-emitting units 12. The light-emitting units 12 include a first light-emitting unit A1, a second light-emitting unit A2, and a third light-emitting unit A3. The designated angle of the first electrode 121 of the first light-emitting unit A1 is a first designated angle θ1, the designated angle of the first electrode 121 of the second light-emitting unit A2 is a second designated angle θ2, and the designated angle of the first electrode 121 of the third light-emitting unit A3 is a third designated angle θ3. The first designated angle θ1, the second designated angle θ2, and the third designated angle θ3 are all different. In this way, the upper surfaces of the first electrodes 121 of the three types of light-emitting units 12, facing away from the base substrate 11, are relatively inclined, thereby reducing the amount of heterochromatic quantum dots remaining in each type of light-emitting unit 12, thereby improving cross-color issues.

[0090] Based on the situation shown in Figure 7, optionally, among the multiple light-emitting units, the first electrode of the third light-emitting unit can also be a horizontal electrode to simplify the process. Please refer to Figure 8, which is a schematic diagram of the cross-sectional structure of another display panel provided in an embodiment of the present application. Among them, the first electrode 121 of the third light-emitting unit 12 can be a horizontal electrode, that is, the specified angle of the first electrode 121 of the third light-emitting unit 12 is zero. The specified angle of the first electrode 121 of the first light-emitting unit A1 is a first specified angle θ1, and the specified angle of the first electrode 121 of the second light-emitting unit A2 is a second specified angle θ2, and the first specified angle θ1 is different from the second specified angle θ2.

[0091] Optionally, the range of the first specified angle θ1 can be: 5 degrees < θ1 < 25 degrees, and the range of the second specified angle θ2 can be: 10 degrees < θ2 < 30 degrees. Within this range, the first specified angle θ1 and the second specified angle θ2 can prevent the first specified angle θ1 and the second specified angle θ2 from being too small, resulting in the upper surface of the first electrode 121 not being tilted enough, and can also prevent the first specified angle θ1 and the second specified angle θ2 from being too close, resulting in the upper surface of the first electrode 121 of the first light-emitting unit A1 and the upper surface of the first electrode 121 of the second light-emitting unit A2 not being tilted enough relative to each other, thereby effectively reducing the amount of residual quantum dots removed by development. In addition, within this range, the first specified angle θ1 and the second specified angle θ2 can also prevent the first specified angle θ1 and the second specified angle θ2 from being too large, resulting in excessive impact on the front light output. For example, the first specified angle θ1 can be 6 degrees, and the second specified angle θ2 can be 12 degrees.

[0092] In an exemplary embodiment, the display panel may further include multiple light decoupling structures. Please refer to FIG9 , which is a schematic cross-sectional view of another display panel provided in an embodiment of the present application. The multiple light decoupling structures 15 correspond to the multiple inclined electrodes, and the orthographic projections of the light decoupling structures 15 on the base substrate 11 overlap with the orthographic projections of the corresponding inclined electrodes on the base substrate 11. The orthographic projections of the multiple light decoupling structures 15 on the base substrate 11 are located outside the orthographic projections of the horizontal electrodes on the base substrate 11. The refractive index of the light decoupling structures 15 is greater than the refractive index of the second electrode. Please refer to FIG10 , which is a schematic cross-sectional view of a portion of the display panel structure provided in FIG9 . Because the refractive index of the light decoupling structure 15 is greater than the refractive index of the second electrode 123, at the interface between the light decoupling structure 15 and the second electrode 123, the exit angle θ5 is less than the incident angle θ4. As a result, the light decoupling structure 15 can direct the light emitted by the light-emitting unit 12 closer to the front light emission direction, thereby improving the front light emission effect of the display panel.

[0093] Optionally, the refractive index of the light decoupling structure is negatively correlated with the target angle of the corresponding tilted electrode. Referring to Figure 9, the light decoupling structure 15 may include a first light decoupling structure 151 and a second light decoupling structure 152. The first light decoupling structure 151 corresponds to the first electrode 121 of the first light-emitting unit A1, and the second light decoupling structure 152 corresponds to the first electrode 121 of the second light-emitting unit A2. The refractive index of the light decoupling structure 15 is negatively correlated with the target angle of the corresponding first electrode 121. The target angle of the tilted electrode is the acute angle between the upper surface of the tilted electrode facing away from the base substrate 11 and a target plane S. The target plane S is perpendicular to the base substrate 11, and the intersection of the target plane S and the upper surface of the tilted electrode is parallel to the base substrate 11. Since the first target angle α1 of the first electrode 121 of the first light-emitting unit A1 is smaller than the second target angle α2 of the first electrode 121 of the second light-emitting unit A2, the refractive index of the first light-emitting structure 151 is greater than the refractive index of the second light-emitting structure 152. In this way, at the interface between the light-emitting structure 15 and the second electrode 123, the light-emitting unit 12 with a smaller target angle has a smaller emission angle of the light, thereby reducing the difference in the light-emitting directions of different types of light-emitting units 12, and thereby improving the display effect of the display panel.

[0094] In addition, the light-emitting unit 12 may further include a hole injection layer 124, a hole transport layer 125, and an electron transport layer 126. The hole injection layer 124 and the hole transport layer 125 are located between the first electrode 121 and the quantum dot light-emitting layer 122, and the electron transport layer 126 is located between the quantum dot light-emitting layer 122 and the second electrode 123. The hole injection layer 124 can inject holes from the first electrode 121 into the hole transport layer 125, and the hole transport layer 125 can transport holes from the first electrode 121 to the quantum dot light-emitting layer 122. The electron transport layer 126 can transport electrons from the second electrode 123 to the quantum dot light-emitting layer 122. The electrons and holes move to the quantum dot light-emitting layer 122, causing the quantum dot light-emitting layer 122 to emit light. Exemplarily, the material of the hole injection layer 124 may include polyethylene dioxythiophene (PEDOT), and the material of the hole transport layer 125 may include a polymer material such as polyvinyl carbazole (PVK) and polytriphenylamine (Poly-TPD).

[0095] The display panel may further include a pixel defining layer 16 , which is located on the side of the insulating layer 13 away from the base substrate 11 . The pixel defining layer 16 includes multiple openings, and the light-emitting units 12 are located in the multiple openings of the pixel defining layer 16 , so that the pixel defining layer 16 can be used to divide the multiple light-emitting units 12 .

[0096] Optionally, for the display panel of the above embodiment, the specified angle of the first electrode of the light-emitting unit can be less than 30 degrees, so as to avoid the upper surface of the first electrode of the light-emitting unit being too tilted, resulting in poor front light emission effect, and the difference in the specified angle of the first electrodes of any two of the first light-emitting unit, the second light-emitting unit and the third light-emitting unit is greater than 5 degrees, so as to avoid the difference between the first electrodes of any two of the first light-emitting unit, the second light-emitting unit and the third light-emitting unit being too small, resulting in poor effect of reducing the residual amount of quantum dots.

[0097] In summary, the embodiments of the present application provide a display panel comprising a substrate and a plurality of light-emitting units. The light-emitting units include a first electrode, a quantum dot light-emitting layer, and a second electrode, which are sequentially arranged in a direction away from the substrate. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit that emit light of different colors. The first electrodes corresponding to the first and second light-emitting units are each provided at a different designated angle. Thus, when the quantum dot light-emitting layer of the first light-emitting unit is formed, the upper surface of the first electrode of the second light-emitting unit is relatively tilted, thereby reducing the amount of residual light from the quantum dot light-emitting layer of the first light-emitting unit on the first electrode of the second light-emitting unit, thereby improving the problem of cross-color.

[0098] On the other hand, an embodiment of the present application provides a method for manufacturing a display panel. Please refer to FIG11 , which is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present application. The method includes:

[0099] Step 1101: Obtain a base substrate.

[0100] Step 1102: forming a plurality of light-emitting units on a base substrate.

[0101] Each light-emitting unit includes a first electrode, a quantum dot light-emitting layer and a second electrode arranged in sequence in a direction away from the substrate. The multiple light-emitting units include a first light-emitting unit and a second light-emitting unit that emit light of different colors.

[0102] The first electrodes of the first light emitting unit and the second light emitting unit have different designated angles, where the designated angle is the angle between the upper surface of the first electrode away from the base substrate and a plane parallel to the base substrate.

[0103] In summary, the embodiments of the present application provide a method for manufacturing a display panel including a substrate and a plurality of light-emitting units. The light-emitting units include a first electrode, a quantum dot light-emitting layer, and a second electrode, which are sequentially arranged in a direction away from the substrate. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit that emit light of different colors. The first electrodes corresponding to the first and second light-emitting units are each provided at a different designated angle. Thus, when forming the quantum dot light-emitting layer of the first light-emitting unit, the upper surface of the first electrode of the second light-emitting unit is relatively inclined, thereby reducing the amount of residual quantum dot light-emitting layer of the first light-emitting unit on the first electrode of the second light-emitting unit, thereby improving the problem of cross-color.

[0104] An embodiment of the present application provides another method for manufacturing a display panel. Please refer to FIG12 , which is a flow chart of another method for manufacturing a display panel provided by an embodiment of the present application. The method includes:

[0105] Step 1201: Obtain a base substrate.

[0106] The base substrate can be used to support other film layers in the display panel. The base substrate 11 can include a hard substrate or a flexible substrate. For example, the hard substrate can include a glass substrate, and the flexible substrate can include a polyimide (PI) substrate.

[0107] Step 1202: forming first electrodes of a plurality of light-emitting units on a base substrate.

[0108] The first electrode 121 may be formed on the base substrate. The first electrode may be an anode. For example, the material of the first electrode 121 may include indium tin oxide (ITO).

[0109] The multiple light-emitting units include a first light-emitting unit and a second light-emitting unit that emit light of different colors. The specified angles of the first electrodes corresponding to the first light-emitting unit and the second light-emitting unit are different. The first electrode of the first light-emitting unit is a horizontal electrode, and the specified angle of the horizontal electrode is zero. The first electrode of the second light-emitting unit is an inclined electrode, and the specified angle of the inclined electrode is greater than zero.

[0110] The inclined electrode can be formed by various methods. The inclined electrode can be formed by processing the first electrode so that the upper surface of the first electrode away from the substrate is inclined. For example, the inclined electrode can be formed by patterning the horizontal electrode using a halftone mask. Since the halftone mask is a partially light-transmitting mask, a gradient etching effect can be achieved on the upper surface of the first electrode away from the substrate, thereby forming the inclined electrode.

[0111] In the embodiment of the present application, the upper surface of the first electrode away from the base substrate can be tilted by using other film layers in the display panel to form an inclined electrode. Please refer to Figure 13, which is a schematic diagram of the preparation process of an inclined electrode in a display panel provided by an embodiment of the present application. The preparation process of the inclined electrode may include:

[0112] S1301 , forming an auxiliary layer 23 on the base substrate 21 .

[0113] The auxiliary layer 23 may be formed on the base substrate 21. The display panel may further include a circuit structure, and the auxiliary layer 23 may provide insulation and protection for the circuit structure. For example, the material of the auxiliary layer 23 may include a polymer material.

[0114] S1302 , forming a plurality of inclined structures 231 on a side of the auxiliary layer 23 away from the base substrate 21 .

[0115] The position of the inclined structure 231 corresponds to the position of the light-emitting unit, and an angle greater than zero is formed between the upper surface of the inclined structure 231 away from the base substrate 21 and a plane parallel to the base substrate 21. The formation process of the inclined structure 231 includes various methods. For example, the auxiliary layer 23 can be patterned using a halftone mask to form a plurality of inclined structures 231. Since the halftone mask is a mask with a partially light-transmitting function, this can achieve a gradual etching effect on the upper surface of the auxiliary layer 23 away from the base substrate 21, thereby forming the inclined structures 231.

[0116] In addition, since the material of the auxiliary layer 23 may include a polymer material, a hard template having an inclined surface may be used to perform pressing on the auxiliary layer 23 to form the inclined structure 231 .

[0117] S1303 , forming a plurality of first electrodes 221 of light-emitting units on a side of the auxiliary layer 23 away from the base substrate 21 .

[0118] The first electrode 221 may be formed on a side of the auxiliary layer 23 away from the base substrate 21 , wherein the inclined electrode contacts the upper surface of the inclined structure 231 .

[0119] Step 1203 : forming a pixel defining layer on the base substrate having the first electrode formed thereon.

[0120] The pixel defining layer can be formed on the base substrate formed with the first electrode, and the pixel defining layer includes a plurality of openings. The light emitting units are located in the openings of the pixel defining layer, so that the pixel defining layer can be used to divide the plurality of light emitting units.

[0121] Step 1204 : Adjust the base substrate so that the first electrode of the third light emitting unit is away from the upper surface of the base substrate and parallel to the horizontal plane.

[0122] Please refer to Figure 14, which is a schematic diagram of a process for preparing a quantum dot light-emitting layer in a display panel according to an embodiment of the present application. By adjusting the tilt of the base substrate 21, and ensuring that the angle between the base substrate 21 and the horizontal plane is equal to a third specified angle θ3, the first electrode 221 of the third light-emitting unit A3 can be aligned with the horizontal plane, away from the upper surface of the base substrate 21, while the upper surface of the first electrode 221 of the second light-emitting unit A2 can be tilted relative to the horizontal plane. The upper surface of the first electrode 221 of the first light-emitting unit A1 can also be tilted relative to the horizontal plane. For example, during the manufacturing process, the base substrate 21 can be placed on a rigid substrate to facilitate its movement. In this embodiment, the base substrate 21 can be tilted by placing it on a support plate with an inclined surface. The support plate can be used to support the base substrate 21, and the base substrate 21 can be placed on the support plate by vacuum suction. Using a support plate with an inclined surface can avoid process complications caused by equipment tilt. Furthermore, the base substrate can be adjusted to different angles of inclination relative to the horizontal plane by replacing the support plate with a different inclined surface.

[0123] Step 1205 : forming a quantum dot material layer of a first color on a side of the first electrodes of the plurality of light-emitting units away from the base substrate.

[0124] Referring to FIG. 14 , a third-color quantum dot material layer QD3 can be formed on a side of the first electrodes 221 of the plurality of light-emitting units away from the base substrate 21 . The third-color quantum dot material layer QD3 can include quantum dots of the third color and a photosensitive crosslinker. The manufacturing process of the third-color quantum dot material layer QD3 can include processes such as doctor blade coating, spray coating, and spin coating. For example, the third color can be red.

[0125] Step 1206 : removing the quantum dot material layer of the third color on the first electrodes other than the first electrode of the third light-emitting unit to form the quantum dot light-emitting layer of the third light-emitting unit.

[0126] Referring to FIG14 (the schematic diagram corresponding to steps 1206 to 1208 in FIG14 does not show the quantum dot light-emitting layer on the pixel defining layer, but this embodiment of the present application is not limited thereto), by performing alignment exposure on the third color quantum dot material layer QD3 on the first electrode 221 of the third light-emitting unit A3, a cross-linking reaction occurs in the third color quantum dot material layer QD3. The third color quantum dot material layer QD3 on the first electrode 221 of the second light-emitting unit A2 is removed by a development process, and the third color quantum dot material layer QD3 on the first electrode 221 of the first light-emitting unit A1 is removed, thereby forming the quantum dot light-emitting layer 222 of the third light-emitting unit A3.

[0127] In addition, the development process includes an immersion process and a rinse process. The development process can be enhanced by increasing the immersion time and the number of rinses. This facilitates the removal of the third color quantum dot material layer QD3 on the first electrode 221 of the second light-emitting unit A2, and facilitates the removal of the third color quantum dot material layer QD3 on the first electrode 221 of the first light-emitting unit A1. This can further reduce the amount of residual quantum dots removed by development, thereby further improving the problem of cross-color. For example, the immersion time of the general development process is 5 minutes to 10 minutes, and the number of rinses is two. The immersion time of the enhanced development process can be 8 minutes to 15 minutes, and the number of rinses can be three. Please refer to Figures 4 and 15. Figure 15 is a schematic diagram of the distribution of quantum dots of another display panel and a corresponding schematic diagram of the cross-sectional structure (the schematic diagram of the distribution of quantum dots is the D1 area shown in Figure 15, and the schematic diagram of the cross-sectional structure is the D2 area shown in Figure 15. The D2 area can be a schematic diagram of the cross-sectional structure of the D1 area at E2-E2). Figure 4 is a schematic diagram of the distribution of quantum dots in the display panel obtained under enhanced development process conditions, and Figure 15 is a schematic diagram of the distribution of quantum dots in the display panel obtained under general development process conditions. Compared with the display panel obtained under general development process conditions, the display panel obtained under enhanced development process conditions has less residual quantum dots in the second area B2. It can be seen that the enhanced development process conditions can effectively reduce the residual amount of quantum dots.

[0128] Step 1207: forming a quantum dot light-emitting layer of a second light-emitting unit.

[0129] Referring to Figure 14 , by adjusting the tilt of the substrate 21 and ensuring that the angle between the substrate 21 and the horizontal plane is equal to the second specified angle θ2, the upper surface of the first electrode 221 of the second light-emitting unit A2, which is away from the substrate 21, is parallel to the horizontal plane. The upper surface of the first electrode 221 of the first light-emitting unit A1 is tilted relative to the horizontal plane, and the upper surface of the first electrode 221 of the third light-emitting unit A3 is tilted relative to the horizontal plane. A second-color quantum dot material layer can be formed on the side of the first electrodes 221 of the multiple light-emitting units away from the substrate 21. The second-color quantum dot material layer can include quantum dots of the second color and a photosensitive crosslinker. The second-color quantum dot material layer can be manufactured using processes such as blade coating, spray coating, and spin coating. For example, the second color can be green.

[0130] By performing alignment exposure on the second color quantum dot material layer on the first electrode 221 of the second light-emitting unit A2, a cross-linking reaction occurs in the second color quantum dot material layer. A development process removes the second color quantum dot material layer on the first electrode 221 of the first light-emitting unit A1, and removes the second color quantum dot material layer on the first electrode 221 of the third light-emitting unit A3, thereby forming the quantum dot light-emitting layer 222 of the second light-emitting unit A2.

[0131] Step 1208 , forming a quantum dot light-emitting layer of the first light-emitting unit.

[0132] Please refer to Figure 14. When forming the quantum dot light-emitting layer of the first light-emitting unit A3, since the first electrode 221 of the first light-emitting unit A1 is a horizontal electrode, there is no need to adjust the inclination of the base substrate 21. The upper surface of the first electrode 221 of the third light-emitting unit A3 is also inclined relative to the horizontal plane, and the upper surface of the first electrode 221 of the second light-emitting unit A2 is also inclined relative to the horizontal plane.

[0133] A quantum dot material layer of a first color may be formed on a side of the first electrodes 221 of the plurality of light-emitting units away from the base substrate 21. The quantum dot material layer of the first color may include quantum dots of the first color and a photosensitive crosslinker. The manufacturing process of the quantum dot material layer of the first color may include blade coating, spray coating, spin coating, etc. For example, the first color may be blue.

[0134] By performing alignment exposure on the first color quantum dot material layer on the first electrode 221 of the second light-emitting unit A2, a cross-linking reaction occurs in the first color quantum dot material layer. A development process is then performed to remove the first color quantum dot material layer on the first electrode 221 of the third light-emitting unit A3, and the first color quantum dot material layer on the first electrode 221 of the second light-emitting unit A2, thereby forming the quantum dot light-emitting layer 222 of the first light-emitting unit A1.

[0135] In addition, the order of forming the quantum dot light-emitting layer 222 of the first light-emitting unit A1, the quantum dot light-emitting layer 222 of the second light-emitting unit A2, and the quantum dot light-emitting layer 222 of the third light-emitting unit A3 can be swapped, and the embodiment of the present application does not limit this.

[0136] Step 1209: forming a second electrode on a side of the quantum dot light-emitting layer away from the base substrate.

[0137] The second electrode may be formed on a side of the quantum dot light-emitting layer away from the substrate. The second electrode may be a cathode. Exemplarily, the material of the second electrode may include a metal material.

[0138] In summary, the embodiments of the present application provide a method for manufacturing a display panel including a substrate and a plurality of light-emitting units. The light-emitting units include a first electrode, a quantum dot light-emitting layer, and a second electrode, which are sequentially arranged in a direction away from the substrate. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit that emit light of different colors. The first electrodes corresponding to the first and second light-emitting units are each provided at a different designated angle. Thus, when forming the quantum dot light-emitting layer of the first light-emitting unit, the upper surface of the first electrode of the second light-emitting unit is relatively inclined, thereby reducing the amount of residual quantum dot light-emitting layer of the first light-emitting unit on the first electrode of the second light-emitting unit, thereby improving the problem of cross-color.

[0139] In another aspect, embodiments of the present application further provide a display device, comprising a housing and any one of the display panels provided in the above embodiments, wherein the display panel may be located within the housing. The display device may be any device including a display function, such as a monitor, a television, a stand-up advertising machine, a picture screen device, a mobile phone, or various smart wearable devices.

[0140] Since the display device includes the display panel provided by the above embodiment, the display device can also have a similar effect, that is, the display effect of the display device can be improved.

[0141] In this application, the term "at least one of A, B and C" indicates that there may be seven relationships, which may represent: A exists alone, B exists alone, C exists alone, A and B exist at the same time, A and C exist at the same time, C and B exist at the same time, and A, B and C exist at the same time.

[0142] In this application, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0143] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that, The display panel includes: a substrate substrate; a plurality of light-emitting units, each of the light-emitting units including a first electrode, a quantum dot light-emitting layer, and a second electrode sequentially arranged in a direction away from the substrate substrate, and the plurality of light-emitting units including a first light-emitting unit and a second light-emitting unit that emit light of different colors; The designated angles of the first electrodes corresponding to the first light-emitting unit and the second light-emitting unit are different, and the designated angle is the degree of the included angle between the upper surface of the first electrode away from the substrate substrate and the plane parallel to the substrate substrate.

2. The display panel according to claim 1, wherein The first electrode of the first light-emitting unit is a horizontal electrode, the designated angle of the horizontal electrode is zero, the first electrode of the second light-emitting unit is an inclined electrode, and the designated angle of the inclined electrode is greater than zero.

3. The display panel according to claim 2, wherein The lower surface of the first electrode close to the substrate substrate is parallel to the substrate substrate.

4. The display panel according to claim 2, characterized in that, The lower surface of the first electrode close to the substrate substrate is parallel to the upper surface of the first electrode away from the substrate substrate; The display panel further includes an auxiliary layer, the auxiliary layer is located between the substrate substrate and the light-emitting unit, one side of the auxiliary layer away from the substrate substrate includes a plurality of inclined structures, the positions of the inclined structures correspond to the positions of the light-emitting units, and there is an included angle greater than zero between the upper surface of the inclined structure away from the substrate substrate and the plane parallel to the substrate substrate, and the inclined electrode is in contact with the upper surface of the inclined structure.

5. The display panel according to claim 1, wherein The light-emitting unit further includes a third light-emitting unit, and the designated angle of the first electrode of the third light-emitting unit is different from the designated angles of the first electrodes of the first light-emitting unit and the second light-emitting unit.

6. The display panel according to claim 5, wherein, The designated angle of the first electrode of the first light-emitting unit is a first designated angle, the designated angle of the first electrode of the second light-emitting unit is a second designated angle, the designated angle of the first electrode of the third light-emitting unit is zero, and the first designated angle is different from the second designated angle.

7. The display panel according to claim 6, wherein The range of the first designated angle θ1 is: 5 degrees < θ1 < 25 degrees, and the range of the second designated angle θ2 is: 10 degrees < θ2 < 30 degrees.

8. The display panel according to claim 2, wherein The display panel further includes a plurality of light extraction structures, the plurality of light extraction structures respectively correspond to the plurality of inclined electrodes, and the orthographic projection of the light extraction structure on the substrate substrate overlaps with the orthographic projection of the corresponding inclined electrode on the substrate substrate, the orthographic projections of the plurality of light extraction structures on the substrate substrate are located outside the orthographic projection of the horizontal electrode on the substrate substrate, and the refractive index of the light extraction structure is greater than the refractive index of the second electrode.

9. The display panel according to claim 8, wherein The refractive index of the light extraction structure is negatively correlated with the target angle of the corresponding inclined electrode, and the target angle of the inclined electrode is the degree of the acute included angle between the upper surface of the inclined electrode away from the substrate substrate and the target plane, the target plane is perpendicular to the substrate substrate, and the intersection line of the target plane and the upper surface is parallel to the substrate substrate.

10. The display panel according to any one of claims 1 to 9, characterized in that, The specified angles of the first electrodes of the light-emitting units are all less than 30 degrees, and the difference between the specified angles of the first electrodes of any two of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit is greater than 5 degrees.

11. A manufacturing method of a display panel, characterized in that, The method includes: Obtaining a substrate. Forming a plurality of light-emitting units on the substrate, each light-emitting unit including a first electrode, a quantum dot light-emitting layer, and a second electrode sequentially arranged in a direction away from the substrate, and the plurality of light-emitting units including a first light-emitting unit and a second light-emitting unit that emit different-color light. The specified angles of the first electrodes corresponding to the first light-emitting unit and the second light-emitting unit are different, and the specified angle is the degree of the angle between the upper surface of the first electrode away from the substrate and a plane parallel to the substrate.

12. The manufacturing method according to claim 11, characterized in that, The forming of the plurality of light-emitting units on the substrate includes: Forming the first electrodes of the plurality of light-emitting units on the substrate, the plurality of light-emitting units including a first light-emitting unit and a second light-emitting unit that emit different-color light, the specified angles of the first electrodes corresponding to the first light-emitting unit and the second light-emitting unit being different, the first electrode of the first light-emitting unit being a horizontal electrode with a specified angle of zero, and the first electrode of the second light-emitting unit being an inclined electrode with a specified angle greater than zero. Adjusting the substrate so that the upper surface of the inclined electrode away from the substrate is parallel to the horizontal plane. Forming a quantum dot material layer of a first color on a side of the first electrodes of the plurality of light-emitting units away from the substrate. Removing the quantum dot material layer of the first color on the other first electrodes except the inclined electrode.

13. The manufacturing method according to claim 12, characterized in that, Before forming the first electrodes of the plurality of light-emitting units on the substrate, the method further includes: Forming an auxiliary layer on the substrate. Forming a plurality of inclined structures on a side of the auxiliary layer away from the substrate, the positions of the inclined structures corresponding to the positions of the light-emitting units, the upper surface of the inclined structure away from the substrate having an angle greater than zero with a plane parallel to the substrate, and the inclined electrode being in contact with the upper surface of the inclined structure.

14. A display device, characterized in that, The display device includes a housing and the display panel according to any one of claims 1 to 10, and the display panel is located in the housing.

Images