Display panel, preparation method thereof and display device

Abstract

The application provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, an isolation structure located on one side of the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation structure comprising a first part and a second part arranged in layers, the first part being located on the side of the second part close to the substrate, the first part comprising a first sub-part and a second sub-part, the orthographic projection of the first sub-part on the substrate being located within the orthographic projection range of the second part on the substrate, the orthographic projection of the second sub-part on the substrate being located outside the orthographic projection range of the second part on the substrate, the width of the second sub-part being different in the same isolation opening and / or between different isolation openings, and a plurality of light emitting devices, at least part of the light emitting devices being located in the isolation openings. Part of the film layers in the light emitting devices can be overlapped with the second sub-part, which is conducive to realizing the overlap of the light emitting devices and the isolation structure in a fixed direction, reducing the occurrence of lateral leakage, and improving the yield of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to display panels, their manufacturing methods, and display devices. Background Technology

[0002] In traditional display panel manufacturing, a fine metal mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also suffers from limitations in precision, high development costs, and long development cycles. Fine metal maskless technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance aspects, offering advantages such as high performance, full-size display, and agile delivery. Summary of the Invention

[0003] In view of this, embodiments of this application provide a display panel, a method for manufacturing the same, and a display device.

[0004] The first aspect of this application provides a display panel, including:

[0005] substrate;

[0006] An isolation structure is located on one side of a substrate, and the isolation structure encloses multiple isolation openings. The isolation structure includes a first part and a second part stacked together, with the first part located on the side of the second part closer to the substrate. The first part includes a first sub-part and a second sub-part. The orthographic projection of the first sub-part on the substrate is within the orthographic projection range of the second part on the substrate, and the orthographic projection of the second sub-part on the substrate is outside the orthographic projection range of the second part on the substrate. The width of the second sub-part extending outward along the edge of the second part is different in the same isolation opening and / or between different isolation openings.

[0007] Multiple light-emitting devices, at least some of which are located in the isolation opening.

[0008] In one embodiment, the second part encloses a plurality of second openings, and in the same second opening, along the circumferential direction of the edge of the second opening, the length of the second sub-part is 40% to 60% of the length of the edge of the second opening;

[0009] Preferably, the length of the orthogonal projection of the second sub-part onto the substrate is 50nm-100nm in a direction parallel to the plane of the substrate and in a direction away from the second part.

[0010] In one embodiment, the second part encloses a plurality of second openings, and the edges of the second openings projected onto the substrate form a quadrilateral. Along the circumferential direction of the second openings, the projection of the second sub-part onto the substrate extends along 1 to 3 sides of the quadrilateral.

[0011] Preferably, the second sub-part is located on opposite sides of the isolation opening;

[0012] Preferably, along the circumferential direction of the second opening, the orthographic projection of the second sub-part on the substrate extends along two opposite sides of the quadrilateral.

[0013] In one embodiment, the first part encloses a plurality of first openings, and the second part encloses a plurality of second openings, with the first and second openings corresponding to the isolation openings;

[0014] The edge of the first opening includes at least one recessed portion, and the at least one recessed portion includes the first recessed portion. The orthogonal projection portion of the first portion surrounding the first recessed portion on the substrate is located outside the orthogonal projection range of the second portion on the substrate, thus constituting the second sub-part.

[0015] Preferably, the edge of the first opening includes a first straight portion and a second straight portion, the first straight portion and the second straight portion extend along a first direction, the first recess is connected to the first straight portion and extends along a second direction away from the first straight portion and toward the second straight portion, and the first direction and the second direction intersect.

[0016] Preferably, in the second direction, the distance between the first straight portion and the second straight portion is greater than or equal to the width of the second opening;

[0017] Preferably, the edge of the first opening further includes a third straight portion, which extends along a first direction, and the first recess connects the first straight portion and the third straight portion; wherein:

[0018] In the first direction, the distance between the end of the first straight section away from the third straight section and the end of the third straight section away from the first straight section is equal to the width of the second opening; the distance between the end of the first straight section near the third straight section and the end of the third straight section near the first straight section is less than or equal to the width of the second opening.

[0019] Preferably, at least one recess includes a second recess, and in a second direction, the second recess and the first recess are located at opposite ends of the first opening;

[0020] Preferably, in the second direction, the distance between the end of the first recess near the second recess and the end of the second recess near the first recess is less than the width of the second opening;

[0021] Preferably, the edge of the first opening further includes a fourth straight portion extending along a first direction, and a second recess connecting the second straight portion and the fourth straight portion, extending along a second direction away from the second straight portion and towards the first straight portion, wherein:

[0022] In the first direction, the distance between the end of the second straight section away from the fourth straight section and the end of the fourth straight section away from the second straight section is greater than or equal to the width of the second opening; the distance between the end of the second straight section near the fourth straight section and the end of the fourth straight section near the second straight section is less than or equal to the width of the second opening.

[0023] Preferably, the first direction and the second direction are perpendicular to each other.

[0024] In one embodiment, adjacent first openings are connected in a first direction;

[0025] Preferably, the first opening includes a first sub-opening and a second sub-opening, and the first sub-opening and the second sub-opening are arranged along a first direction;

[0026] The edge of the first sub-opening includes a first straight portion, a second straight portion, a third straight portion, a fourth straight portion, a first recessed portion, and a second recessed portion. The first straight portion, the second straight portion, the third straight portion, and the fourth straight portion extend along a first direction. The first recessed portion connects the first straight portion and the third straight portion and extends along a second direction away from the first straight portion and toward the second straight portion. The second recessed portion connects the second straight portion and the fourth straight portion and extends along a second direction away from the second straight portion and toward the first straight portion. The third straight portion is located on the side of the first straight portion closer to the second sub-opening, and the fourth straight portion is located on the side of the second straight portion closer to the second sub-opening.

[0027] Preferably, at least one recess includes a third recess and a fourth recess, and the edge of the second sub-opening includes a fifth straight section, a sixth straight section, a seventh straight section, an eighth straight section, a third recess, and a fourth recess. The fifth, sixth, seventh, and eighth straight sections extend along a first direction. The third recess connects the fifth and seventh straight sections and extends along a second direction away from the fifth straight section and toward the sixth straight section. The fourth recess connects the sixth and eighth straight sections and extends along a second direction away from the sixth straight section and toward the fifth straight section. The fifth straight section is located on the side of the seventh straight section near the first sub-opening, and the sixth straight section is located on the side of the eighth straight section near the second sub-opening.

[0028] Preferably, the third straight section is connected to the fifth straight section, and the fourth straight section is connected to the sixth straight section.

[0029] In one embodiment, the isolation structure further includes a third part located on the side of the second part away from the substrate, wherein the orthographic projection of the second part on the substrate is within the orthographic projection range of the third part on the substrate, and the orthographic projection of the first part on the substrate is within the orthographic projection range of the third part on the substrate.

[0030] In one embodiment, the second part includes a second part body and a passivation layer, wherein the passivation layer is located on the outer periphery of the second part body;

[0031] Preferably, the material of the passivation layer includes aluminum oxide;

[0032] Preferably, the material of the first part includes molybdenum, the material of the second body part includes aluminum, and the material of the third part includes titanium.

[0033] In one embodiment, the light-emitting device includes a second electrode layer, a light-emitting functional layer, and a first electrode layer. The second electrode layer is located between the isolation structure and the substrate and is at least partially exposed through the isolation opening. The light-emitting functional layer and the first electrode layer are located in the isolation opening. The light-emitting functional layer and the second sub-part are spaced apart, and the first electrode layer overlaps with the second sub-part.

[0034] Preferably, the display panel further includes a pixel defining layer located between the second electrode layer and the isolation structure. The pixel defining layer encloses a plurality of pixel openings, and the pixel openings are correspondingly arranged with the isolation openings. The light-emitting functional layer and the first electrode layer are located in the connected pixel openings and isolation openings.

[0035] A second aspect of this application provides a display panel, comprising:

[0036] substrate;

[0037] An isolation structure is located on one side of a substrate, enclosing multiple isolation openings. The isolation structure includes a first part, a second part, and a third part stacked sequentially, with the first part located on the side of the second part closer to the substrate. The first part includes a first sub-part and a second sub-part. The orthographic projection of the first sub-part on the substrate falls within the orthographic projection range of the second part on the substrate, while the orthographic projection of the second sub-part on the substrate falls outside the orthographic projection range of the second part on the substrate. The orthographic projection of the second part on the substrate falls within the orthographic projection range of the third part on the substrate, and the orthographic projection of the first part on the substrate falls within the orthographic projection range of the third part on the substrate. The width of the second sub-part extending outward along the edge of the second part differs within the same isolation opening and / or between different isolation openings.

[0038] Multiple light-emitting devices, some of which are located in the isolation opening.

[0039] In one embodiment, the second part encloses a plurality of second openings, and in the same second opening, along the circumferential direction of the edge of the second opening, the length of the second sub-part is 40% to 60% of the length of the edge of the second opening;

[0040] Preferably, the second part includes a second part body and a passivation layer, wherein the passivation layer is located on the outer periphery of the second part body;

[0041] Preferably, the passivation layer comprises aluminum oxide;

[0042] Preferably, the material of the first part includes molybdenum, the material of the second part includes aluminum, and the material of the third part includes titanium.

[0043] In one embodiment, the first part encloses a plurality of first openings, and the second part encloses a plurality of second openings, with the first and second openings corresponding to the isolation openings;

[0044] The edge of the first opening includes at least one recessed portion, and the at least one recessed portion includes the first recessed portion. The orthogonal projection portion of the first portion surrounding the first recessed portion on the substrate is located outside the orthogonal projection range of the second portion on the substrate, thus constituting the second sub-part.

[0045] Preferably, the edge of the first opening includes a first straight portion and a second straight portion, the first straight portion and the second straight portion extend along a first direction, the first recess is connected to the first straight portion and extends along a second direction away from the first straight portion and toward the second straight portion, and the first direction and the second direction intersect.

[0046] Preferably, in the second direction, the distance between the first straight portion and the second straight portion is greater than or equal to the width of the second opening;

[0047] Preferably, the edge of the first opening further includes a third straight portion, which extends along a first direction, and the first recess connects the first straight portion and the third straight portion; wherein:

[0048] In the first direction, the distance between the end of the first straight section away from the third straight section and the end of the third straight section away from the first straight section is greater than or equal to the width of the second opening; the distance between the end of the first straight section near the third straight section and the end of the third straight section near the first straight section is less than or equal to the width of the second opening.

[0049] Preferably, at least one recess includes a second recess, and in a second direction, the second recess and the first recess are located at opposite ends of the first opening;

[0050] Preferably, in the second direction, the distance between the end of the first recess near the second recess and the end of the second recess near the first recess is less than the width of the second opening;

[0051] Preferably, the edge of the first opening further includes a fourth straight portion extending along a first direction, and a second recess connecting the second straight portion and the fourth straight portion, extending along a second direction away from the second straight portion and towards the first straight portion, wherein:

[0052] In the first direction, the distance between the end of the second straight section away from the fourth straight section and the end of the fourth straight section away from the second straight section is greater than or equal to the width of the second opening; the distance between the end of the second straight section near the fourth straight section and the end of the fourth straight section near the second straight section is less than or equal to the width of the second opening.

[0053] Preferably, in the first direction, adjacent first openings are connected;

[0054] Preferably, the first direction and the second direction are perpendicular to each other.

[0055] A third aspect of this application provides a method for manufacturing a display panel, comprising:

[0056] A second electrode layer is fabricated on one side of the substrate;

[0057] An isolation structure is prepared on the side of the second electrode layer away from the substrate; the isolation structure encloses a plurality of isolation openings; the isolation structure includes a first part and a second part stacked together, the first part being located on the side of the second part closer to the substrate; the first part includes a first sub-part and a second sub-part, the orthographic projection of the first sub-part on the substrate is within the orthographic projection range of the second part on the substrate, and the orthographic projection of the second sub-part on the substrate is outside the orthographic projection range of the second part on the substrate; the width of the second sub-part extending outward along the edge of the second part is different in the same isolation opening and / or between different isolation openings;

[0058] A light-emitting functional layer and a first electrode layer are sequentially fabricated in an isolation opening to obtain multiple light-emitting devices.

[0059] In one embodiment, the step of fabricating an isolation structure on the side of the second electrode layer away from the substrate includes:

[0060] A first isolation material layer is prepared on the side of the second electrode layer away from the substrate, and the first isolation material layer is patterned to obtain a first isolation material intermediate layer.

[0061] A second isolation material layer and a third isolation material layer are sequentially prepared on the surface of the first isolation material intermediate layer that is away from the substrate;

[0062] The third isolation material layer, the second isolation material layer, and the intermediate layer of the first isolation material are graphically processed to obtain the first part, the second part, and the third part stacked in sequence, thus obtaining the isolation structure.

[0063] In one embodiment, the step of patterning the first insulating material layer includes:

[0064] Multiple third openings are formed in the first isolation material layer, and the third openings are arranged along the first direction and spaced apart.

[0065] In the second direction, the width of the third opening is greater than the width of the edge of the second part projected onto the substrate, and the first direction intersects with the second direction.

[0066] Preferably, in the first direction, the width of the first insulating material layer between adjacent third openings corresponding to the same insulating opening is smaller than the width of the insulating opening projected onto the substrate.

[0067] In one embodiment, after the step of fabricating the isolation structure on the side of the second electrode layer away from the substrate, and before the step of sequentially fabricating the light-emitting functional layer and the first electrode layer in the isolation opening, the method further includes:

[0068] The second part is passivated.

[0069] Preferably, the step of sequentially fabricating the light-emitting functional layer and the first electrode layer in the isolation opening includes:

[0070] A light-emitting functional layer is deposited using a first evaporation source and under a first evaporation angle.

[0071] The first electrode layer is deposited using a second evaporation source under a second evaporation angle.

[0072] The first evaporation source extends along the first direction, the second evaporation source extends along the first direction, and the second evaporation angle is greater than the first evaporation angle.

[0073] A fourth aspect of this application provides a display device, including the aforementioned display panel, or including a display panel prepared by the aforementioned preparation method.

[0074] According to the display panel provided in the embodiments of this application, the orthographic projection of the first sub-part of the first part of the isolation structure on the substrate is located within the orthographic projection range of the second part on the substrate, and the orthographic projection of the second sub-part on the substrate is located outside the orthographic projection range of the second part on the substrate. Part of the film layer in the light-emitting device can overlap with the second sub-part, which is beneficial to realize the overlap of the light-emitting device and the isolation structure in a fixed direction, which is beneficial to reduce the occurrence of lateral leakage current, and beneficial to improve the yield of the display panel. Attached Figure Description

[0075] Figure 1 This is a schematic cross-sectional view of the display panel in one embodiment of this application.

[0076] Figure 2 This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0077] Figure 3 This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0078] Figure 4This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0079] Figure 5 This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0080] Figure 6 This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0081] Figure 7 This is a top view of the second and first parts in one embodiment of this application.

[0082] Figure 8 This is a schematic diagram of the structure of the film layer deposited by evaporation source in one embodiment of this application.

[0083] Figure 9 This is a top view of the first part in one embodiment of this application.

[0084] Figure 10 This is a top view of the first part in another embodiment of this application.

[0085] Figure 11 This is a top view of the first part in another embodiment of this application.

[0086] Figure 12 This is a top view of the first part in another embodiment of this application.

[0087] Figure 13 This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0088] Figure 14 This is a cross-sectional structural diagram of the isolation structure in one embodiment of this application.

[0089] Figure 15 This is a schematic diagram of the process for manufacturing a display panel in one embodiment of this application.

[0090] Figure 16 , Figure 17 , Figure 20 and Figure 21 This is a schematic diagram of the fabrication process of the display panel in one embodiment of the application.

[0091] Figure 18 This is a schematic cross-sectional view of the intermediate layer between the substrate and the first insulating material in a second direction according to one embodiment of this application.

[0092] Figure 19 This is a top view of the intermediate layer of the first insulating material in one embodiment of this application. Detailed Implementation

[0093] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0094] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods and means well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0095] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0096] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0097] The first aspect of this application provides a display panel, as shown in the reference... Figures 1 to 6 The schematic diagram of the cross-sectional structure of the display panel shown includes: a substrate 100; an isolation structure 200 located on one side of the substrate 100, the isolation structure 200 enclosing a plurality of isolation openings 210; the isolation structure 200 includes a first part 201 and a second part 202 stacked together, the first part 201 being located on the side of the second part 202 closer to the substrate 100; the first part 201 includes a first sub-part 2011 and a second sub-part 2012, the orthographic projection of the first sub-part 2011 on the substrate is within the orthographic projection range of the second part 202 on the substrate 100, the orthographic projection of the second sub-part 2012 on the substrate 100 is outside the orthographic projection range of the second part 202 on the substrate 100, in the same isolation opening 210 and / or between different isolation openings 210, along a direction parallel to the plane where the substrate 100 is located, the width W of the second sub-part 2012 extending outward along the edge of the second part 202 is different; a plurality of light-emitting devices 300, at least some of the light-emitting devices 300 being located in the isolation openings 210.

[0098] It is understandable that, within the same isolation opening 210, the different widths of the second sub-part 2012 along a direction parallel to the plane of the substrate 100 can be broadly interpreted as follows: 1. Referring to... Figure 2 and Figure 3In the second direction y, the width of the second sub-part 2012 is different. For example, in the second direction y, the width of the second sub-part 2012 on one side is 0, while the width of the second sub-part on the opposite side is greater than 0. It should be noted that the width of the second sub-part 2012 on one side in the second direction y is 0 in the following cases: the boundary between the orthographic projection of the first sub-part 2011 on the substrate 100 and the orthographic projection of the second part 202 on the substrate 100 is flush (refer to...). Figure 2 Alternatively, the boundary of the orthographic projection of the first sub-part 2011 onto the substrate 100 lies within the orthographic projection of the second part 202 onto the substrate 100 (see reference). Figure 3 ); 2. In the second direction y, the width of the second sub-part 2012 is greater than 0, and in the first direction x, the width of the second sub-part 2012 is 0. It should be noted that the width of the second sub-part 2012 being 0 in the first direction x includes the following cases: the orthographic projection of the first sub-part 2011 on the substrate 100 is flush with the boundary of the orthographic projection of the second part 202 on the substrate 100, or the boundary of the orthographic projection of the first sub-part 2011 on the substrate 100 is located inside the orthographic projection of the second part 202 on the substrate 100, or the width of the first sub-part between adjacent isolation openings 210 is 0 in the first direction x.

[0099] It is understandable that the difference in width of the second sub-part 2012 between different isolation openings 210 along the direction parallel to the plane of the substrate 100 can be broadly interpreted as follows: in adjacent isolation openings 210, the width of the second sub-part 2012 in one isolation opening is greater than 0, while in another isolation opening 210, the width of the second sub-part is 0. It should be noted that the width of the second sub-part being 0 in another isolation opening 210 includes the following cases: the boundary between the orthographic projection of the first sub-part 2011 on the substrate 100 and the orthographic projection of the second sub-part 202 on the substrate 100 is flush (refer to...). Figure 2 Alternatively, the boundary of the orthographic projection of the first sub-part 2011 onto the substrate 100 lies within the orthographic projection of the second part 202 onto the substrate 100 (see reference). Figure 3 ).

[0100] For example, the second part 202 encloses a plurality of second openings 2023. The edges of the second openings 2023 projected onto the substrate 100 form a quadrilateral. Along the circumferential direction of the second openings 2023, the projection of the second sub-part 2012 onto the substrate 100 extends along a portion of the edge of the projection of the second openings 2023 onto the substrate 100. Specifically, this includes the following cases: along the circumferential direction of the second openings 2023, the projection of the second sub-part 2012 onto the substrate 100 extends along a portion of the quadrilateral's edge. For example, along the circumferential direction of the second openings 2023, the projection of the second sub-part 2012 onto the substrate 100 extends along 1 to 3 sides of the quadrilateral, for example, along 1 side of the quadrilateral (refer to...). Figure 9), 2 sides (refer to) Figure 7 (or 3 sides extended)

[0101] According to the display panel provided in the embodiments of this application, the orthographic projection of the first sub-part 2011 of the first part 201 of the isolation structure 200 on the substrate 100 is located within the orthographic projection range of the second part 202 on the substrate 100, and the orthographic projection of the second sub-part 2012 on the substrate 100 is located outside the orthographic projection range of the second part 202 on the substrate 100, so that a portion of the film layer in the light-emitting device 300 overlaps with the second sub-part 2012, which is beneficial to achieve the overlap of the light-emitting device 300 and the isolation structure 200 in a fixed direction, which is beneficial to reduce the occurrence of lateral leakage current and improve the yield of the display panel.

[0102] It should be noted that, in this article, the orthographic projection of the first sub-part 2011 onto the substrate is within the orthographic projection range of the second part 202 onto the substrate 100, and should be interpreted broadly. Specifically, the boundary of the orthographic projection of the first sub-part 2011 onto the substrate is completely within the orthographic projection range of the second part 202 onto the substrate 100 (see [reference] for details). Figure 4 Alternatively, the boundary of the orthographic projection of a portion of the first sub-part 2011 onto the substrate lies within the orthographic projection range of the second part 202 onto the substrate 100, while the boundary of the orthographic projection of the remaining portion of the first sub-part 2011 onto the substrate coincides with the boundary of the orthographic projection of the second part 202 onto the substrate 100 (see details). Figure 5 Alternatively, the boundary of the orthographic projection of the first sub-part 2011 onto the substrate completely coincides with the boundary of the orthographic projection of the second part 202 onto the substrate 100 (see details). Figure 6 ).

[0103] In one embodiment, within the same second opening 2023, the length of the second sub-part 2012 along the circumferential direction of the edge of the second opening 2023 is 40% to 60% of the edge length of the second opening 2023, for example, it can be 40%, 45%, 50%, 55%, or 60%. Therefore, the length of the second sub-part 2012 is appropriate, resulting in a good overlap between the first electrode layer 310 and the second sub-part 2012.

[0104] It is understood that multiple second sub-parts 2012 can be correspondingly set in the same second opening 2023, and the length of the second sub-part 2012 mentioned above refers to the sum of the lengths of multiple second sub-parts 2012.

[0105] In one embodiment, the length of the orthographic projection of the second sub-part 2012 onto the substrate 100 in a direction parallel to the plane of the substrate 100 and in a direction away from the second part 202 is 50nm-100nm, for example, it can be 50nm, 60nm, 70nm, 80nm, 90nm, or 100nm. This ensures excellent overlap between the first electrode layer 310 and the second sub-part 2012.

[0106] In one embodiment, refer to Figure 1 The light-emitting device 300 includes a second electrode layer 320, a light-emitting functional layer 330, and a first electrode layer 310. The second electrode layer 320 is located between the isolation structure 200 and the substrate 100 and is at least partially exposed in the isolation opening 210. The light-emitting functional layer 330 and the first electrode layer 310 are located in the isolation opening 210. The light-emitting functional layer 330 and the second sub-part 2012 are spaced apart. The first electrode layer 310 overlaps with the second sub-part 2012.

[0107] It is understood that one of the first electrode layer 310 and the second electrode layer 320 is an anode, and the other of the first electrode layer 310 and the second electrode layer 320 is a cathode. Exemplarily, the light-emitting functional layer 330 includes an emitting layer (EML), and may further include at least one of a hole injection layer (HIL), a hole transport layer (HTL), and an electron-blocking layer (EBL) located between the anode and the emitting layer (EML), and at least one of an electron injection layer (EIL), an electron transport layer (ETL), and a hole-blocking layer (HBL) located between the cathode and the emitting layer (EML).

[0108] In one embodiment, refer to Figure 1 The display panel also includes a pixel defining layer 400 located between the second electrode layer 320 and the isolation structure 200. The pixel defining layer 400 encloses a plurality of pixel openings 410, and the pixel openings 410 and the isolation openings 210 are correspondingly arranged. The light-emitting functional layer 330 and the first electrode layer 310 are located in the connected pixel openings 410 and the isolation openings 210.

[0109] It should be noted that the orthographic projection of the pixel opening 410 on the substrate 100 is within the orthographic projection range of the isolation opening 210 on the substrate 100.

[0110] In the prior art, when the light-emitting functional layer 330 is deposited in the connected pixel opening 410 and the isolation opening 210, if the orthogonal projection of the second part 202 on the substrate 100 is within the orthogonal projection range of the first part 201 on the substrate 100, since the evaporation source is strip-shaped, the evaporation angle cannot be controlled at the opposite ends of the evaporation source. The light-emitting functional layer deposited at the opposite ends of the evaporation source will overlap with the first part 201 of the isolation structure 200, which poses a risk of leakage due to overlap. In this embodiment, the orthographic projection of the first sub-part 2011 of the first part 201 of the isolation structure 200 onto the substrate 100 is within the orthographic projection range of the second part 202 onto the substrate 100, while the orthographic projection of the second sub-part 2012 onto the substrate 100 is outside the orthographic projection range of the second part 202 onto the substrate 100. The first electrode layer 310 overlaps with the second sub-part 2012, and the light-emitting functional layer 330 is spaced apart from the second sub-part 2012. This allows the second electrode layer 320 to overlap with the isolation structure 200 in a fixed direction, which helps to avoid leakage current at the overlap between the light-emitting functional layer 330 and the second sub-part 2012, thus improving the yield of the display panel. During the fabrication of the light-emitting functional layer 330, the position of the evaporation source can be adjusted so that the distance between the second sub-part 2012 and the opposite ends of the evaporation source is greater, thus avoiding overlap between the light-emitting functional layer 330 and the second sub-part 2012. In one embodiment, refer to Figure 7 The diagram shows a top view of the second and first parts, with the second sub-parts 2012 located on opposite sides of the isolation opening 210. In this case, the evaporation source can be positioned at the perpendicular bisector of the line connecting the two second sub-parts 2012, and the evaporation source extends along the direction of the perpendicular bisector. This prevents the material deposited at opposite ends of the evaporation source from overlapping with the second sub-parts 2012. Simultaneously, along the direction of the line connecting the two second sub-parts 2012, the evaporation angle of the evaporation source can be adjusted to prevent the light-emitting functional layer 330 from contacting the second sub-parts 2012, thus avoiding leakage caused by the overlap of the light-emitting functional layer 330 with the isolation structure 200.

[0111] For example, refer to Figure 7 The orthographic projection of the second opening 2023 on the substrate 100 is a rectangle. Along the circumferential direction of the second opening 2023, the orthographic projection of the second sub-part 2012 on the substrate 100 extends along the two opposite sides of the rectangle.

[0112] It is understandable that the deposition angle cannot be controlled at either end of the evaporation source, but the deposition position of the material can be controlled by adjusting the deposition angle in the direction perpendicular to the evaporation source (i.e., the scanning direction). For example, refer to... Figure 8The schematic diagram of the evaporation source deposition layer shown indicates that the extension direction (nozzle) of the evaporation source 10 is perpendicular to the scanning direction (Scan). The boundary position of the deposition layer 20 is controlled by adjusting the deposition angle θ in the Scan direction. During deposition, the evaporation source 10 is located directly above the substrate 30 to be deposited. The deposition angle θ refers to the maximum value of the angle between the scanning direction of the evaporation source 10 and the direction perpendicular to the plane of the substrate 30.

[0113] In one embodiment, refer to Figure 9 and Figure 10 The top view of the first part shown shows that the first part 201 encloses a plurality of first openings 2013, and the first openings 2013 are correspondingly provided with the isolation openings 210. The edge of the first opening 2013 includes at least one recess 2014, and the at least one recess 2014 includes a first recess 20141. The orthographic projection of the first part 201 enclosing the first recess 20141 on the substrate 100 is located outside the orthographic projection range of the second part 202 on the substrate 100, thus constituting the second sub-part 2012.

[0114] For example, the edge of the first opening 2013 projected onto the substrate 100 can be rectangular, and a portion of the rectangular area is missing to form a recess 2014, such as... Figure 9 and Figure 10 As shown by the dashed line in the image.

[0115] In one embodiment, refer to Figure 11 The top view of the first part shown in the diagram shows that the edge of the first opening 2013 includes a first straight section L1 and a second straight section L2. The first straight section L1 and the second straight section L2 extend along a first direction x. The first recessed section 20141 is connected to the first straight section L1 and extends along a second direction y that is away from the first straight section L1 and toward the second straight section L2. The first direction x and the second direction y intersect.

[0116] In one embodiment, refer to Figure 11 In the second direction y, the distance D1 between the first straight portion L1 and the second straight portion L2 is greater than or equal to the width D2 of the second opening 2023. This facilitates the second portion 202 covering the first portion 201, achieving overlap between the first electrode layer 310 and the first portion 201 in a fixed direction.

[0117] In one embodiment, refer to Figure 11The edge of the first opening 2013 also includes a third straight portion L3, which extends along the first direction x. The first recess 20141 connects the first straight portion L1 and the third straight portion L3. Specifically, in the first direction x, the distance D3 between the end of the first straight portion L1 away from the third straight portion L3 and the end of the third straight portion L3 away from the first straight portion L1 is greater than or equal to the width D4 of the second opening 2023; the distance D5 between the end of the first straight portion L1 near the third straight portion L3 and the end of the third straight portion L3 near the first straight portion L1 is less than or equal to the width D4 of the second opening 2023. Therefore, in the first direction x, the orthographic projection of the first portion 201 will not exceed the orthographic projection range of the second portion 202. In the first direction x, the first electrode layer 310 will not overlap with the first portion 201, and the light-emitting functional layer 330 will not contact the first portion 201, avoiding leakage due to overlap.

[0118] For example, the first direction x and the second direction y are perpendicular to each other. It can be understood that the first direction x can be parallel to the nozzle direction of the evaporation source 10, and the second direction y can be parallel to the scan direction of the evaporation source 10.

[0119] In one embodiment, refer to Figure 11 At least one recess 2014 includes a second recess 20142, and in the second direction y, the second recess 20142 and the first recess 20141 are located at opposite ends of the first opening 2013. This facilitates increasing the length of the second sub-part 2012 and improving the overlap effect between the first electrode layer 310 and the second sub-part 2012.

[0120] In one embodiment, refer to Figure 11 In the second direction y, the distance D6 between the end of the first recess 20141 near the second recess 20142 and the end of the second recess 20142 near the first recess 20141 is less than the width D2 of the second opening 2023. This facilitates obtaining two opposing second sub-parts 2012, increases the length of the second sub-parts 2012, and improves the overlap effect between the first electrode layer 310 and the second sub-parts 2012.

[0121] In one embodiment, refer to Figure 11The edge of the first opening 2013 also includes a fourth straight portion L4, which extends along a first direction x. A second recess 20142 connects the second straight portion L2 and the fourth straight portion L4 and extends along a second direction away from the second straight portion L2 and towards the first straight portion L1. Specifically, in the first direction x, the distance D7 between the end of the second straight portion L2 away from the fourth straight portion L4 and the end of the fourth straight portion L4 away from the second straight portion L2 is greater than or equal to the width D4 of the second opening 2023; the distance D8 between the end of the second straight portion L2 near the fourth straight portion L4 and the end of the fourth straight portion L4 near the second straight portion L2 is less than or equal to the width D4 of the second opening 2023. Therefore, in the first direction x, the orthographic projection of the first portion 201 will not exceed the orthographic projection range of the second portion 202. In the first direction x, the first electrode layer 310 will not overlap with the first portion 201, and the light-emitting functional layer 330 will not contact the first portion 201, thus avoiding leakage due to overlap.

[0122] In one embodiment, refer to Figure 12 The top view of the first part shown shows that adjacent first openings 2013 are connected in the first direction x.

[0123] In one embodiment, the first opening 2013 includes a first sub-opening 20131 and a second sub-opening 20132, which are arranged along a first direction x. The edge of the first sub-opening 20131 includes a first straight portion L1, a second straight portion L2, a third straight portion L3, a fourth straight portion L4, a first recessed portion 20141, and a second recessed portion 20142, which extend along the first direction x. The recessed portion 20141 connects the first straight portion L1 and the third straight portion L3, and extends in a second direction y, away from the first straight portion L1 and toward the second straight portion L2. The second recessed portion 20142 connects the second straight portion L2 and the fourth straight portion L4, and extends in a second direction y, away from the second straight portion L2 and toward the first straight portion L1. The third straight portion L3 is located on the side of the first straight portion L2 near the second sub-opening 20132, and the fourth straight portion L4 is located on the side of the second straight portion L2 near the second sub-opening 20132. The side; at least one recess includes a third recess 20143 and a fourth recess 20144, the edge of the second sub-opening 20132 includes a fifth straight portion L5, a sixth straight portion L6, a seventh straight portion L7, an eighth straight portion L8, a third recess 20143 and a fourth recess 20144, the fifth straight portion L5, the sixth straight portion L6, the seventh straight portion L7 and the eighth straight portion L8 extend along a first direction x, the third recess 20143 connects between the fifth straight portion L5 and the seventh straight portion L7 and extends away from the fifth straight portion L5 extends in a second direction y toward the sixth straight section L6; the fourth recess 20144 connects the sixth straight section L6 and the eighth straight section L8, and extends in a second direction y away from the sixth straight section L6 and toward the fifth straight section L5; the fifth straight section L5 is located on the side of the seventh straight section L7 near the first sub-opening 20131, and the sixth straight section L6 is located on the side of the eighth straight section L8 near the second sub-opening 20132; the third straight section L3 is connected to the fifth straight section L5, and the fourth straight section L4 is connected to the sixth straight section L6. This facilitates communication between two adjacent first openings 2013.

[0124] It is understandable that when two adjacent first openings 2013 are connected, the length of the first part 201 in the isolation structure 200 between two adjacent isolation openings 210 is 0. (See reference for details.) Figure 13 The diagram shows the structure of the display panel.

[0125] In one embodiment, refer to Figure 1The isolation structure 200 also includes a third part 203, located on the side of the second part 202 facing away from the substrate 100. The orthographic projection of the second part 202 on the substrate 100 falls within the orthographic projection range of the third part 203 on the substrate 100, and the orthographic projection of the first part 201 on the substrate 100 also falls within the orthographic projection range of the third part 203 on the substrate 100. Therefore, during the deposition of the light-emitting functional layer 330 and the first electrode layer 310, the third part 203 can effectively isolate the light-emitting functional layer 330 and the first electrode layer 310. This allows for the acquisition of a high-precision light-emitting functional layer 330 and the first electrode layer 310 without the need for an open-circuit mirror (FMM), simplifying the display panel manufacturing process and reducing manufacturing costs.

[0126] In one embodiment, refer to Figure 14 The schematic diagram of the isolation structure shown indicates that the second part 202 includes a second body 2021 and a passivation layer 2022, with the passivation layer 2022 located on the outer periphery of the second body 2021. This facilitates the avoidance of electrical connection between the light-emitting functional layer 330 and the isolation structure 200 in the first direction x or in the nozzle direction of the evaporation source 10.

[0127] For example, the passivation layer 2022 is made of aluminum oxide. Therefore, aluminum oxide is non-conductive, which helps to prevent electrical connection between the light-emitting functional layer 330 and the isolation structure 200 in the first direction x or the nozzle direction of the evaporation source 10.

[0128] For example, the material of the first part includes molybdenum, the material of the second body part includes aluminum, and the material of the third part includes titanium.

[0129] In some embodiments, the substrate may be an array substrate. Exemplarily, the array substrate may be a glass substrate. In one embodiment, the array substrate may include an organic resin material such as epoxy resin, triazine, silicone resin, or polyimide. For example, the array substrate may be an FR4 type printed circuit board (PCB), or a flexible PCB that is easily deformable. In one embodiment, the array substrate may include a ceramic material such as silicon nitride, aluminum nitride, or aluminum oxide, or include a metal or metal compound. For example, the array substrate may be a metal core PCB (MCPCB) or a metal copper clad laminate (MCCL).

[0130] A second aspect of this application provides a display panel, as shown in [reference] Figure 1The system includes: a substrate 100; an isolation structure 200 located on one side of the substrate 100, the isolation structure 200 enclosing a plurality of isolation openings 210; the isolation structure includes a first part 201, a second part 202, and a third part 203 stacked sequentially, the first part 201 being located on the side of the second part 202 closer to the substrate 100; the first part 201 includes a first sub-part 2011 and a second sub-part 2012, the orthographic projection of the first sub-part 2011 on the substrate being within the orthographic projection range of the second sub-part 202 on the substrate 100, and the orthographic projection of the second sub-part 2012 on the substrate 100 being within the orthographic projection range of the second sub-part 2011 on the substrate 100. 2. Outside the orthographic projection range on substrate 100; the orthographic projection of the second part 202 on substrate 100 is located within the orthographic projection range of the third part 203 on substrate 100, and the orthographic projection of the first part 201 on substrate 100 is located within the orthographic projection range of the third part 203 on substrate 100; in the same isolation opening 210 and / or between different isolation openings 210, along the direction parallel to the plane where substrate 100 is located, the width W of the second sub-part 2012 extending outward along the edge of the second part 202 is different; multiple light-emitting devices 300, some of which are located in the isolation opening 210.

[0131] In one embodiment, the second portion 202 encloses a plurality of second openings 2023. Within the same second opening 2023, along the circumferential direction of the edge of the second opening 2023, the length of the second sub-portion 2012 is 40% to 60% of the edge length of the second opening 2023, for example, 40%, 45%, 50%, 55%, or 60%. Therefore, the length of the second sub-portion 2012 is appropriate, resulting in a good overlap between the first electrode layer 310 and the second sub-portion 2012.

[0132] In one embodiment, refer to Figure 14 The schematic diagram of the isolation structure shown indicates that the second part 202 includes a second body 2021 and a passivation layer 2022, with the passivation layer 2022 located on the outer periphery of the second body 2021. This facilitates the avoidance of electrical connection between the light-emitting functional layer 330 and the isolation structure 200 in the first direction x or in the nozzle direction of the evaporation source 10.

[0133] For example, the passivation layer 2022 is made of aluminum oxide. Therefore, aluminum oxide is non-conductive, which helps to prevent electrical connection between the light-emitting functional layer 330 and the isolation structure 200 in the first direction x or the nozzle direction of the evaporation source 10.

[0134] For example, the material of the first part includes molybdenum, the material of the second body part includes aluminum, and the material of the third part includes titanium.

[0135] In one embodiment, refer to Figure 9 and Figure 10The first part 201 encloses a plurality of first openings 2013, and the first openings 2013 and the second openings 2023 are both corresponding to the isolation openings 210. The edge of the first opening 2013 includes at least one recess 2014, and the at least one recess 2014 includes a first recess 20141. The orthographic projection of the first part 201 enclosing the first recess 20141 on the substrate 100 is located outside the orthographic projection range of the second part 202 on the substrate 100, thus constituting the second sub-part 2012.

[0136] In one embodiment, refer to Figure 11 The edge of the first opening 2013 includes a first straight portion L1 and a second straight portion L2. The first straight portion L1 and the second straight portion L2 extend along a first direction x. The first recess 20141 is connected to the first straight portion L1 and extends along a second direction y that is away from the first straight portion L1 and toward the second straight portion L2. The first direction x and the second direction y intersect.

[0137] In one embodiment, refer to Figure 11 In the second direction y, the distance D1 between the first straight portion L1 and the second straight portion L2 is greater than or equal to the width D2 of the second opening 2023. This facilitates the second portion 202 covering the first portion 201, achieving overlap between the first electrode layer 310 and the first portion 201 in a fixed direction.

[0138] In one embodiment, refer to Figure 11 The edge of the first opening 2013 also includes a third straight portion L3, which extends along the first direction x. The first recess 20141 connects the first straight portion L1 and the third straight portion L3. Specifically, in the first direction x, the distance D3 between the end of the first straight portion L1 away from the third straight portion L3 and the end of the third straight portion L3 away from the first straight portion L1 is greater than or equal to the width D4 of the second opening 2023; the distance D5 between the end of the first straight portion L1 near the third straight portion L3 and the end of the third straight portion L3 near the first straight portion L1 is less than or equal to the width D4 of the second opening 2023. Therefore, in the first direction x, the orthographic projection of the first portion 201 will not exceed the orthographic projection range of the second portion 202. In the first direction x, the first electrode layer 310 will not overlap with the first portion 201, and the light-emitting functional layer 330 will not contact the first portion 201, avoiding leakage due to overlap.

[0139] For example, the first direction x and the second direction y are perpendicular to each other. It can be understood that the first direction x can be parallel to the nozzle direction of the evaporation source 10, and the second direction y can be parallel to the scan direction of the evaporation source 10.

[0140] In one embodiment, refer to Figure 11At least one recess 2014 includes a second recess 20142, and in the second direction y, the second recess 20142 and the first recess 20141 are located at opposite ends of the first opening 2013. This facilitates increasing the length of the second sub-part 2012 and improving the overlap effect between the first electrode layer 310 and the second sub-part 2012.

[0141] In one embodiment, refer to Figure 11 In the second direction y, the distance D6 between the end of the first recess 20141 near the second recess 20142 and the end of the second recess 20142 near the first recess 20141 is less than the width D2 of the second opening 2023. This facilitates obtaining two opposing second sub-parts 2012, increases the length of the second sub-parts 2012, and improves the overlap effect between the first electrode layer 310 and the second sub-parts 2012.

[0142] In one embodiment, refer to Figure 11 The edge of the first opening 2013 also includes a fourth straight portion L4, which extends along a first direction x. A second recess 20142 connects the second straight portion L2 and the fourth straight portion L4 and extends along a second direction away from the second straight portion L2 and towards the first straight portion L1. Specifically, in the first direction x, the distance D7 between the end of the second straight portion L2 away from the fourth straight portion L4 and the end of the fourth straight portion L4 away from the second straight portion L2 is greater than or equal to the width D4 of the second opening 2023; the distance D8 between the end of the second straight portion L2 near the fourth straight portion L4 and the end of the fourth straight portion L4 near the second straight portion L2 is less than or equal to the width D4 of the second opening 2023. Therefore, in the first direction x, the orthographic projection of the first portion 201 will not exceed the orthographic projection range of the second portion 202. In the first direction x, the first electrode layer 310 will not overlap with the first portion 201, and the light-emitting functional layer 330 will not contact the first portion 201, thus avoiding leakage due to overlap.

[0143] In one embodiment, adjacent first openings 2013 are connected in the first direction x, and the way adjacent first openings 2013 are connected can be referred to the display panel of the aforementioned embodiment, which will not be described in detail here.

[0144] It should be noted that the display panel in this embodiment can be combined with the display panel described above in whole or in part, which will not be elaborated further here.

[0145] The third aspect of this application provides a method for manufacturing a display panel, referring to... Figure 15 The diagram shows a process flow chart for manufacturing a display panel, which includes the following steps.

[0146] S100: A second electrode layer is fabricated on one side of the substrate, as detailed in [reference needed]. Figure 16 .

[0147] It should be noted that the second electrode layer is consistent with the previous description, and will not be elaborated further here.

[0148] S200: An isolation structure is fabricated on the side of the second electrode layer away from the substrate.

[0149] The isolation structure encloses multiple isolation openings; the isolation structure includes a first part and a second part stacked together, with the first part located on the side of the second part closer to the substrate; the first part includes a first sub-part and a second sub-part, with the orthographic projection of the first sub-part on the substrate located within the orthographic projection range of the second part on the substrate, and the orthographic projection of the second sub-part on the substrate located outside the orthographic projection range of the second part on the substrate; in the same isolation opening and / or between different isolation openings, along a direction parallel to the plane where the substrate 100 is located, the width of the second sub-part 2012 extending outward along the edge of the second part 202 is different.

[0150] It should be noted that the isolation structure is consistent with the previous description, and will not be elaborated further here.

[0151] In one embodiment, a pixel defining material layer 40 is prepared on the side of the second electrode layer away from the substrate before the isolation structure is prepared.

[0152] In one embodiment, the step of fabricating an isolation structure on the side of the second electrode layer away from the substrate includes: fabricating a first isolation material layer on the side of the second electrode layer 320 away from the substrate 100, and patterning the first isolation material layer to obtain a first isolation material intermediate layer 21 (see details). Figure 17 , Figure 18 and Figure 19 ); a second isolation material layer 22 and a third isolation material layer 23 are sequentially prepared on the surface of the first isolation material intermediate layer 21 facing away from the substrate 100 (see details). Figure 20 The third isolation material layer 23, the second isolation material layer 22, and the first isolation material intermediate layer 21 are graphically processed to obtain the first part 201, the second part 202, and the third part 203 stacked sequentially, thus obtaining the isolation structure (refer to...). Figure 21 ).

[0153] Understandably, the pixel defining material layer 40 is etched to obtain the pixel defining layer 400.

[0154] In one embodiment, the step of graphically processing the first insulating material layer includes: opening a plurality of third openings 212 in the first insulating material layer 21, the third openings 212 being arranged along a first direction x and spaced apart (see details). Figure 19); where, in the second direction y, the width W1 of the third opening 212 is greater than the width W2 of the second opening 2023 enclosed by the second part 202, and the first direction x intersects the second direction y.

[0155] For example, in the first direction x, the width of the first isolation material layer 21 between adjacent third openings 212 corresponding to the same isolation opening 210 is smaller than the width of the isolation opening 210 projected onto the substrate 100.

[0156] In one embodiment, after the step of fabricating the isolation structure on the side of the second electrode layer facing away from the substrate, and before the step of sequentially fabricating the light-emitting functional layer and the first electrode layer in the isolation opening, the method further includes: passivating the second part. Exemplarily, oxygen can be used to oxidize the second part.

[0157] S300: A light-emitting functional layer and a first electrode layer are sequentially fabricated in an isolation opening to obtain multiple light-emitting devices.

[0158] It should be noted that the light-emitting device is the same as described above, and will not be elaborated further here.

[0159] In one embodiment, the step of sequentially fabricating a light-emitting functional layer and a first electrode layer in an isolation opening includes: depositing the light-emitting functional layer using a first evaporation source at a first evaporation angle; and depositing the first electrode layer using a second evaporation source at a second evaporation angle. The first evaporation source extends along a first direction, the second evaporation source extends along the first direction, and the second evaporation angle is greater than the first evaporation angle. Thus, the orthographic projection of the obtained light-emitting functional layer on the substrate is within the range of the orthographic projection of the first electrode layer on the substrate.

[0160] A fourth aspect of this application provides a display device, including the aforementioned display panel, or including a display panel prepared by the aforementioned preparation method.

[0161] It should be noted that, in addition to the aforementioned display panel, the display device may also include structures that conventional display devices should have, such as touch panels and driver chips, which will not be elaborated on further here.

[0162] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0163] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A display panel, characterized in that, include: substrate; An isolation structure is located on one side of the substrate, and the isolation structure encloses a plurality of isolation openings; The isolation structure includes a first part and a second part stacked together, the first part being located on the side of the second part closer to the substrate; the first part includes a first sub-part and a second sub-part, the orthographic projection of the first sub-part on the substrate being within the orthographic projection range of the second part on the substrate, and the orthographic projection of the second sub-part on the substrate being outside the orthographic projection range of the second part on the substrate; the width of the second sub-part extending outward along the edge of the second part is different in the same isolation opening and / or between different isolation openings; Multiple light-emitting devices, at least some of which are located in the isolation opening.

2. The display panel according to claim 1, characterized in that, The second part encloses multiple second openings. In the same second opening, along the circumferential direction of the edge of the second opening, the length of the second sub-part is 40% to 60% of the length of the edge of the second opening. Preferably, in a direction parallel to the plane of the substrate and in a direction away from the second part, the length of the orthogonal projection of the second sub-part on the substrate is 50nm-100nm.

3. The display panel according to claim 1, characterized in that, The second part encloses a plurality of second openings, the edges of the second openings projected onto the substrate to form a quadrilateral, and along the circumferential direction of the second openings, the projection of the second sub-part onto the substrate extends along 1 to 3 sides of the quadrilateral. Preferably, the second sub-part is located on opposite sides of the isolation opening; Preferably, along the circumferential direction of the second opening, the orthographic projection of the second sub-part on the substrate extends along two opposite sides of the quadrilateral.

4. The display panel according to claim 1, characterized in that, The first part encloses a plurality of first openings, and the second part encloses a plurality of second openings, wherein the first openings and the second openings are both provided corresponding to the isolation openings; The edge of the first opening includes at least one recessed portion, and at least one of the recessed portions includes a first recessed portion. The orthographic projection portion of the first portion surrounding the first recessed portion on the substrate is located outside the orthographic projection range of the second portion on the substrate, thus constituting the second sub-part. Preferably, the edge of the first opening includes a first straight portion and a second straight portion, the first straight portion and the second straight portion extend along a first direction, the first recess is connected to the first straight portion and extends along a second direction away from the first straight portion and toward the second straight portion, the first direction and the second direction intersect. Preferably, in the second direction, the distance between the first straight portion and the second straight portion is greater than or equal to the width of the second opening; Preferably, the edge of the first opening further includes a third straight portion, the third straight portion extending along the first direction, and the first recess connecting the first straight portion and the third straight portion; wherein: In the first direction, the distance between the end of the first straight portion away from the third straight portion and the end of the third straight portion away from the first straight portion is greater than or equal to the width of the second opening; the distance between the end of the first straight portion near the third straight portion and the end of the third straight portion near the first straight portion is less than or equal to the width of the second opening. Preferably, at least one of the recesses includes a second recess, and in the second direction, the second recess and the first recess are located at opposite ends of the first opening; Preferably, in the second direction, the distance between the end of the first recess near the second recess and the end of the second recess near the first recess is less than the width of the second opening; Preferably, the edge of the first opening further includes a fourth straight portion, the fourth straight portion extending along the first direction, and the second recessed portion connecting the second straight portion and the fourth straight portion, extending along a second direction away from the second straight portion and towards the first straight portion, wherein: In the first direction, the distance between the end of the second straight portion away from the fourth straight portion and the end of the fourth straight portion away from the second straight portion is greater than or equal to the width of the second opening; the distance between the end of the second straight portion near the fourth straight portion and the end of the fourth straight portion near the second straight portion is less than or equal to the width of the second opening. Preferably, the first direction and the second direction are perpendicular to each other.

5. The display panel according to claim 4, characterized in that, In the first direction, adjacent first openings are connected; Preferably, the first opening includes a first sub-opening and a second sub-opening, and the first sub-opening and the second sub-opening are arranged along the first direction; The edge of the first sub-opening includes a first straight portion, a second straight portion, a third straight portion, a fourth straight portion, a first recessed portion, and a second recessed portion. The first straight portion, the second straight portion, the third straight portion, and the fourth straight portion extend along the first direction. The first recessed portion connects the first straight portion and the third straight portion and extends along a second direction away from the first straight portion and toward the second straight portion. The second recessed portion connects the second straight portion and the fourth straight portion and extends along a second direction away from the second straight portion and toward the first straight portion. The third straight portion is located on the side of the first straight portion closer to the second sub-opening, and the fourth straight portion is located on the side of the second straight portion closer to the second sub-opening. Preferably, at least one of the recesses includes a third recess and a fourth recess, and the edge of the second sub-opening includes a fifth straight section, a sixth straight section, a seventh straight section, an eighth straight section, the third recess, and the fourth recess. The fifth, sixth, seventh, and eighth straight sections extend along the first direction. The third recess connects the fifth and seventh straight sections and extends along a second direction away from the fifth straight section and toward the sixth straight section. The fourth recess connects the sixth and eighth straight sections and extends along a second direction away from the sixth straight section and toward the fifth straight section. The fifth straight section is located on the side of the seventh straight section near the first sub-opening, and the sixth straight section is located on the side of the eighth straight section near the second sub-opening. Preferably, the third straight section is connected to the fifth straight section, and the fourth straight section is connected to the sixth straight section.

6. The display panel according to claim 1, characterized in that, The isolation structure further includes a third part located on the side of the second part away from the substrate, wherein the orthographic projection of the second part on the substrate is within the orthographic projection range of the third part on the substrate, and the orthographic projection of the first part on the substrate is within the orthographic projection range of the third part on the substrate.

7. The display panel according to claim 6, characterized in that, The second part includes a second part body and a passivation layer, wherein the passivation layer is located on the outer periphery of the second part body; Preferably, the material of the passivation layer includes aluminum oxide; Preferably, the material of the first part includes molybdenum, the material of the second part body includes aluminum, and the material of the third part includes titanium.

8. The display panel according to claim 1, characterized in that, The light-emitting device includes a second electrode layer, a light-emitting functional layer, and a first electrode layer. The second electrode layer is located between the isolation structure and the substrate and is at least partially exposed through the isolation opening. The light-emitting functional layer and the first electrode layer are located in the isolation opening. The light-emitting functional layer is spaced apart from the second sub-part, and the first electrode layer overlaps with the second sub-part. Preferably, the display panel further includes a pixel defining layer located between the second electrode layer and the isolation structure. The pixel defining layer encloses a plurality of pixel openings, and the pixel openings are correspondingly disposed with respect to the isolation openings. The light-emitting functional layer and the first electrode layer are located in the connected pixel openings and the isolation openings.

9. A display panel, characterized in that, include: substrate; An isolation structure is located on one side of the substrate, and the isolation structure encloses multiple isolation openings. The isolation structure includes a first part, a second part, and a third part stacked sequentially. The first part is located on the side of the second part closer to the substrate. The first part includes a first sub-part and a second sub-part. The orthographic projection of the second part on the substrate is within the orthographic projection range of the third part on the substrate, and the orthographic projection of the first sub-part on the substrate is within the orthographic projection range of the third part on the substrate. The orthographic projection of the first sub-part on the substrate is within the orthographic projection range of the second part on the substrate, and the orthographic projection of the second sub-part on the substrate is outside the orthographic projection range of the second part on the substrate. The width of the second sub-part extending outward along the edge of the second part is different in the same isolation opening and / or between different isolation openings. Multiple light-emitting devices, some of which are located in the isolation opening.

10. The display panel according to claim 9, characterized in that, The second part encloses multiple second openings. In the same second opening, along the circumferential direction of the edge of the second opening, the length of the second sub-part is 40% to 60% of the length of the edge of the second opening. Preferably, the second part includes a second part body and a passivation layer, wherein the passivation layer is located on the outer peripheral side of the second part body; Preferably, the passivation layer comprises aluminum oxide; Preferably, the material of the first part includes molybdenum, the material of the second part includes aluminum, and the material of the third part includes titanium.

11. The display panel according to claim 9, characterized in that, The first part encloses a plurality of first openings, and the second part encloses a plurality of second openings, wherein the first openings and the second openings are both provided corresponding to the isolation openings; The edge of the first opening includes at least one recessed portion, and at least one of the recessed portions includes a first recessed portion. The orthographic projection portion of the first portion surrounding the first recessed portion on the substrate is located outside the orthographic projection range of the second portion on the substrate, thus constituting the second sub-part. Preferably, the edge of the first opening includes a first straight portion and a second straight portion, the first straight portion and the second straight portion extend along a first direction, the first recess is connected to the first straight portion and extends along a second direction away from the first straight portion and toward the second straight portion, the first direction and the second direction intersect. Preferably, in the second direction, the distance between the first straight portion and the second straight portion is greater than or equal to the width of the second opening; Preferably, the edge of the first opening further includes a third straight portion, the third straight portion extending along the first direction, and the first recess connecting the first straight portion and the third straight portion; wherein: In the first direction, the distance between the end of the first straight portion away from the third straight portion and the end of the third straight portion away from the first straight portion is greater than or equal to the width of the second opening; the distance between the end of the first straight portion near the third straight portion and the end of the third straight portion near the first straight portion is less than or equal to the width of the second opening. Preferably, at least one of the recesses includes a second recess, and in the second direction, the second recess and the first recess are located at opposite ends of the first opening; Preferably, in the second direction, the distance between the end of the first recess near the second recess and the end of the second recess near the first recess is less than the width of the second opening; Preferably, the edge of the first opening further includes a fourth straight portion, the fourth straight portion extending along the first direction, and the second recessed portion connecting the second straight portion and the fourth straight portion, extending along a second direction away from the second straight portion and towards the first straight portion, wherein: In the first direction, the distance between the end of the second straight portion away from the fourth straight portion and the end of the fourth straight portion away from the second straight portion is greater than or equal to the width of the second opening; the distance between the end of the second straight portion near the fourth straight portion and the end of the fourth straight portion near the second straight portion is less than or equal to the width of the second opening. Preferably, in the first direction, adjacent first openings are connected; Preferably, the first direction and the second direction are perpendicular to each other.

12. A method for manufacturing a display panel, characterized in that, include: A second electrode layer is fabricated on one side of the substrate; An isolation structure is prepared on the side of the second electrode layer that is away from the substrate; The isolation structure encloses multiple isolation openings; The isolation structure includes a first part and a second part stacked together, the first part being located on the side of the second part closer to the substrate; the first part includes a first sub-part and a second sub-part, the orthographic projection of the first sub-part on the substrate being within the orthographic projection range of the second part on the substrate, and the orthographic projection of the second sub-part on the substrate being outside the orthographic projection range of the second part on the substrate; the width of the second sub-part extending outward along the edge of the second part is different in the same isolation opening and / or between different isolation openings; A light-emitting functional layer and a first electrode layer are sequentially fabricated in the isolation opening to obtain multiple light-emitting devices.

13. The preparation method according to claim 12, characterized in that, The step of fabricating an isolation structure on the side of the second electrode layer opposite to the substrate includes: A first isolation material layer is prepared on the side of the second electrode layer away from the substrate, and the first isolation material layer is patterned to obtain a first isolation material intermediate layer. A second isolation material layer and a third isolation material layer are sequentially prepared on the surface of the first isolation material intermediate layer that is opposite to the substrate; The third isolation material layer, the second isolation material layer, and the first isolation material intermediate layer are graphically processed to obtain the first part, the second part, and the third part stacked in sequence, thus obtaining the isolation structure.

14. The preparation method according to claim 13, characterized in that, The step of graphically processing the first insulating material layer includes: Multiple third openings are formed in the first insulating material layer, and the third openings are arranged along the first direction and spaced apart. In the second direction, the width of the third opening is greater than the width of the edge of the second part projected onto the substrate, and the first direction intersects with the second direction. Preferably, in the first direction, the width of the first insulating material layer between adjacent third openings corresponding to the same insulating opening is smaller than the width of the insulating opening projected onto the substrate.

15. The preparation method according to claim 13, characterized in that, After the step of fabricating an isolation structure on the side of the second electrode layer opposite to the substrate, and before the step of sequentially fabricating a light-emitting functional layer and a first electrode layer in the isolation opening, the method further includes: The second part is passivated. Preferably, the step of sequentially fabricating the light-emitting functional layer and the first electrode layer in the isolation opening includes: The light-emitting functional layer is deposited using a first evaporation source and under a first evaporation angle condition; The first electrode layer is deposited using a second evaporation source and under a second evaporation angle. The first evaporation source extends along a first direction, the second evaporation source extends along a first direction, and the second evaporation angle is greater than the first evaporation angle.

16. A display device, characterized in that, It includes the display panel according to any one of claims 1 to 11, or the display panel prepared by the preparation method according to any one of claims 12 to 15.

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