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

Abstract

The application provides a display panel, a manufacturing method of the display panel and a display device. The display panel comprises a substrate, a first electrode layer, a pixel definition layer, an isolation structure and a light-emitting layer. The first electrode layer comprises a first electrode. The pixel definition layer comprises a pixel limiting part, a first pixel opening and a second pixel opening. The pixel limiting part has a first side wall facing the first pixel opening and a second side wall facing the second pixel opening. The isolation structure is arranged on one side of the pixel limiting part. The light-emitting layer comprises a first carrier layer in the first pixel opening and a second carrier layer in the second pixel opening. The first carrier layer and the second carrier layer are both arranged in contact with the isolation structure. The sheet resistance of the first carrier layer is smaller than that of the second carrier layer. The distance between the first end of the first side wall on the side of the first electrode and the isolation structure is greater than the distance between the second end of the second side wall on the side of the first electrode and the isolation structure, thereby reducing the leakage between the first electrode and the isolation structure.

Description

Technical Field

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

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] 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 mask-less technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance characteristics, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe relevant content regarding fine metal mask-less technology and are provided for reference.

[0004] However, the performance of current display products needs to be improved. Summary of the Invention

[0005] This application provides a display panel, a method for manufacturing the display panel, and a display device, aiming to improve the performance of the display panel.

[0006] An embodiment of the first aspect of this application provides a display panel, including: a substrate, a first electrode layer, a pixel definition layer, an isolation structure, and a light-emitting layer; the first electrode layer is disposed on one side of the substrate and includes a plurality of spaced-apart first electrodes; the pixel definition layer is disposed on one side of the substrate, the pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion, at least a portion of the structure of each first electrode is exposed through the pixel opening, the pixel opening includes a first pixel opening and a second pixel opening, the pixel defining portion has a first sidewall facing the first pixel opening and a second sidewall facing the second pixel opening; the isolation structure is disposed on the side of the pixel defining portion away from the substrate, the isolation structure forms a plurality of isolation openings, the isolation openings are connected to the pixel openings; the light-emitting layer includes a plurality of light-emitting units, the plurality of light-emitting units including a first light-emitting unit located in the first pixel opening and a second light-emitting unit. The second light-emitting unit is located in the second pixel opening. The first light-emitting unit includes a first light-emitting structure and a first carrier layer disposed between the first light-emitting structure and the corresponding first electrode. The first carrier layer is in contact with the isolation structure. The second light-emitting unit includes a second light-emitting structure and a second carrier layer disposed between the second light-emitting structure and the corresponding first electrode. The second carrier layer is in contact with the isolation structure. The sheet resistance of the first carrier layer is less than that of the second carrier layer. The first sidewall has a first end facing the corresponding first electrode, and the second sidewall has a second end facing the corresponding first electrode. Along the thickness direction perpendicular to the display panel, the minimum distance between the first end and the isolation structure facing the substrate is a first distance, and the minimum distance between the second end and the isolation structure facing the substrate is a second distance. The first distance is greater than the second distance.

[0007] According to an embodiment of this application, the first carrier layer includes a first hole injection layer and a first hole transport layer stacked along the direction away from the substrate, the first hole transport layer being in contact with the isolation structure, the second carrier layer includes a second hole injection layer and a second hole transport layer stacked along the direction away from the substrate, the second hole transport layer being in contact with the isolation structure, and the sheet resistance of the first hole transport layer being less than the sheet resistance of the second hole transport layer.

[0008] According to the embodiments of this application, the isolation structure includes a first sub-layer, a second sub-layer, and a third sub-layer. The third sub-layer is disposed between the first sub-layer and the pixel defining portion. The second sub-layer is disposed on the side of the first sub-layer away from the substrate. Along the thickness direction perpendicular to the display panel, the minimum distance between the first end and the third sub-layer is greater than the minimum distance between the second end and the third sub-layer.

[0009] According to embodiments of this application, the first hole transport layer is in contact with the third sublayer, and / or the second hole transport layer is in contact with the third sublayer.

[0010] According to embodiments of this application, the material of the third sublayer includes molybdenum.

[0011] According to embodiments of this application, the material of the first sublayer includes aluminum.

[0012] According to embodiments of this application, the material of the second sublayer includes titanium.

[0013] According to an embodiment of this application, the orthographic projection of the first sublayer on the substrate lies within the orthographic projection of the second sublayer on the substrate.

[0014] According to an embodiment of this application, the orthographic projection of the first sublayer on the substrate lies within the orthographic projection of the third sublayer on the substrate.

[0015] According to the embodiments of this application, the first light-emitting unit is used to emit red light, and the second light-emitting unit is used to emit green light or blue light.

[0016] According to embodiments of this application, the first spacing is 6 micrometers to 11.5 micrometers.

[0017] According to an embodiment of this application, the second light-emitting unit is used to emit green light, and the second spacing is 4.5 micrometers to 9 micrometers.

[0018] According to an embodiment of this application, the second light-emitting unit is used to emit blue light, and the second spacing is 3 micrometers to 6 micrometers.

[0019] According to the embodiments of this application, the first light-emitting unit is used to emit green light, and the second light-emitting unit is used to emit blue light.

[0020] According to embodiments of this application, the first spacing is 4.5 micrometers to 9 micrometers.

[0021] According to embodiments of this application, the second spacing is 3 micrometers to 6 micrometers.

[0022] According to an embodiment of this application, the pixel opening further includes a third pixel opening, the pixel limiting portion has a third sidewall facing the third pixel opening, and the plurality of light-emitting units further includes a third light-emitting unit located in the third pixel opening. The third light-emitting unit includes a third light-emitting structure and a third carrier layer disposed between the third light-emitting structure and the corresponding first electrode. The third carrier layer is in contact with the isolation structure. The sheet resistance of the third carrier layer is greater than that of the second carrier layer. The third sidewall has a third end facing the corresponding first electrode. Along the thickness direction perpendicular to the display panel, the minimum distance between the third end and the isolation structure facing the substrate is the third distance, which is smaller than the second distance.

[0023] According to an embodiment of this application, the third sub-carrier layer includes a third hole injection layer and a third hole transport layer stacked along the direction away from the substrate. The third hole transport layer is disposed in contact with the isolation structure, and the sheet resistance of the third hole transport layer is greater than that of the second hole transport layer.

[0024] According to an embodiment of this application, along the thickness direction perpendicular to the display panel, the minimum spacing between the third end and the third sub-layer is less than the minimum spacing between the second end and the third sub-layer.

[0025] According to an embodiment of this application, the third hole transport layer is in contact with the third sublayer.

[0026] According to the embodiments of this application, the first light-emitting unit is used to emit red light, the second light-emitting unit is used to emit green light, and the third light-emitting unit is used to emit blue light.

[0027] According to embodiments of this application, along the thickness direction perpendicular to the display panel, the minimum spacing between the first end and the third sub-layer is 6 micrometers to 11.5 micrometers; and / or, the minimum spacing between the second end and the third sub-layer is 4.5 micrometers to 9 micrometers; and / or, the minimum spacing between the third end and the third sub-layer is 3 micrometers to 6 micrometers.

[0028] According to an embodiment of this application, the display panel further includes a second electrode layer, the second electrode layer including a second electrode at least partially located in each pixel opening, the second electrode being disposed on the side of the light-emitting unit away from the substrate, and the second electrode being in contact with the isolation structure.

[0029] A second aspect of this application provides a method for manufacturing a display panel, comprising:

[0030] Multiple spaced first electrodes are formed on one side of the substrate;

[0031] A pixel definition material layer is formed on one side of the substrate. The pixel definition material layer is patterned to form a pixel limiting portion and a pixel opening formed by the pixel limiting portion. At least a portion of the structure of each first electrode is exposed through the pixel opening. The pixel opening includes a first pixel opening and a second pixel opening. The pixel limiting portion has a first sidewall facing the first pixel opening and a second sidewall facing the second pixel opening. The first sidewall has a first end facing the first electrode and the second sidewall has a second end facing the first electrode.

[0032] An isolation structure is formed on the side of the pixel limiting portion away from the substrate. The isolation structure encloses and forms a plurality of isolation openings. The isolation openings are connected to the pixel openings. Along the thickness direction perpendicular to the display panel, the minimum distance between the first end and the side of the isolation structure facing the substrate is the first distance, and the minimum distance between the second end and the side of the isolation structure facing the substrate is the second distance. The first distance is greater than the second distance.

[0033] A first light-emitting unit is formed in a first pixel opening, and a second light-emitting unit is formed in a second pixel opening. The first light-emitting unit includes a first light-emitting structure and a first carrier layer disposed between the first light-emitting structure and a first electrode. The first carrier layer is in contact with an isolation structure. The second light-emitting unit includes a second light-emitting structure and a second carrier layer disposed between the second light-emitting structure and the first electrode. The second carrier layer is in contact with an isolation structure. The sheet resistance of the first carrier layer is less than the sheet resistance of the second carrier layer.

[0034] According to an embodiment of this application, the pixel opening further includes a third pixel opening, and the pixel limiting portion further has a third sidewall facing the third pixel opening side, the third sidewall having a third end facing the first electrode side;

[0035] In the step of forming an isolation structure on the side of the pixel limiting portion away from the substrate, the method further includes: along the thickness direction perpendicular to the display panel, the minimum distance between the third end and the side of the isolation structure facing the substrate is a third distance, and the third distance is smaller than the second distance.

[0036] The steps of forming a first light-emitting unit in a first pixel opening and forming a second light-emitting unit in a second pixel opening further include: a third light-emitting unit in a third pixel opening, the third light-emitting unit including a third light-emitting structure and a third carrier layer disposed between the third light-emitting structure and the first electrode, the third carrier layer being in contact with an isolation structure, and the sheet resistance of the third carrier layer being greater than the sheet resistance of the second carrier layer.

[0037] An embodiment of the third aspect of this application also provides a display device, including the display panel in any of the embodiments of the first aspect above, or a display panel prepared by a manufacturing method including the display panel in any of the embodiments of the second aspect above.

[0038] In the embodiments of this application, a first sub-layer is in contact with an isolation structure surrounding the first pixel opening. A first electrode extends from its first end to the isolation structure via a current transmission path between the first sub-layer and the isolation structure. A second sub-layer is in contact with an isolation structure surrounding the second pixel opening. The first electrode extends from its second end to the isolation structure via a current transmission path between the second sub-layer and the isolation structure. The sheet resistance of the first sub-layer is less than that of the second sub-layer, making the risk of leakage from the first electrode to the isolation structure through the first sub-layer greater than that through the second sub-layer. Along a direction perpendicular to the thickness of the display panel, the minimum distance between the first end and the isolation structure surrounding the first pixel opening towards the substrate is a first distance, and the minimum distance between the second end and the isolation structure surrounding the second pixel opening towards the substrate is a second distance. The first distance is greater than the second distance, resulting in a longer current transmission path between the first electrode at the first pixel opening and the isolation structure, thereby reducing leakage between the first electrode exposed at the first pixel opening and the isolation structure. Attached Figure Description

[0039] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0040] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0041] Figure 2 yes Figure 1 Cross-sectional view at point AA;

[0042] Figure 3 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0044] Figure 5 This is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application;

[0045] Figures 6 to 8 This is a schematic diagram of a manufacturing process for a display panel provided in an embodiment of this application.

[0046] Explanation of reference numerals in the figures: 100, substrate; 200, first electrode; 300, isolation structure; 301, first sublayer; 302, second sublayer; 303, third sublayer; 304, isolation opening; 400, light-emitting unit; 401, hole injection layer; 402, hole transport layer; 403, light-emitting structure; 404, electron injection layer; 405, electron transport layer; 410, first light-emitting unit; 411, first carrier layer; 411a, first hole injection layer; 411b, first hole transport layer; 412, first light-emitting structure; 420, second light-emitting unit; 421, second carrier layer; 421a, second light-emitting structure. Hole injection layer; 421b, second hole transport layer; 422, second light-emitting structure; 430, third light-emitting unit; 431, third carrier layer; 431a, third hole injection layer; 431b, third hole transport layer; 432, third light-emitting structure; 500, second electrode; 600, pixel defining portion; 610, pixel opening; 611, first pixel opening; 612, second pixel opening; 613, third pixel opening; 620, first sidewall; 621, first end; 630, second sidewall; 631, second end; 640, third sidewall; 641, third end; 700, encapsulation portion; Z, thickness direction. Detailed Implementation

[0047] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] like Figure 1 and Figure 2 As shown, a display panel provided in the first aspect of this application includes: a substrate 100, a first electrode layer, a pixel definition layer, an isolation structure 300, and a light-emitting layer; the first electrode layer is disposed on one side of the substrate 100 and includes a plurality of spaced-apart first electrodes 200; the pixel definition layer is disposed on one side of the substrate 100, and the pixel definition layer includes pixel defining portions 600 and pixel openings 610 formed by the pixel defining portions 600, at least a portion of the structure of each first electrode 200 is exposed through the pixel opening 610, and the pixel opening 610 includes a first pixel opening 61. 1. A first sidewall 620 facing the first pixel opening 611 and a second sidewall 630 facing the second pixel opening 612 are provided. An isolation structure 300 is disposed on the side of the pixel limiting portion 600 away from the substrate 100, and the isolation structure 300 surrounds and forms a plurality of isolation openings 304, which are connected to the pixel opening 610. The light-emitting layer includes a plurality of light-emitting units 400, which include a first light-emitting unit 410 located in the first pixel opening 611 and a second light-emitting unit 430 located in the second pixel opening 612. The second light-emitting unit 420 in the second pixel opening 612 includes a first light-emitting structure 410 and a first carrier layer 411 disposed between the first light-emitting structure 412 and the corresponding first electrode 200. The first carrier layer 411 is in contact with the isolation structure 300. The second light-emitting unit 420 includes a second light-emitting structure 422 and a second carrier layer 421 disposed between the second light-emitting structure 422 and the corresponding first electrode 200. The second carrier layer 421 is in contact with the isolation structure 300. The sheet resistance of the carrier layer 411 is less than that of the second carrier layer 421. The first sidewall 620 has a first end 621 facing the side corresponding to the first electrode 200, and the second sidewall 630 has a second end 631 facing the side corresponding to the first electrode 200. Along the thickness direction Z perpendicular to the display panel, the minimum distance between the first end 621 and the isolation structure 300 facing the substrate 100 is the first distance a, and the minimum distance between the second end 631 and the isolation structure 300 facing the substrate 100 is the second distance b. The first distance a is greater than the second distance b.

[0051] In this embodiment, the pixel defining portion 600 of the pixel definition layer encloses and forms a pixel opening 610 to house the light-emitting unit 400, thereby enabling the light-emitting unit 400 to emit light normally. Furthermore, the pixel defining portion 600 defines the placement area of ​​each light-emitting unit 400, reducing color crosstalk between the light-emitting units 400. The orthographic projection of the first electrode 200 on the substrate 100 and the orthographic projection of the pixel opening 610 on the substrate 100 at least partially overlap, and at least a portion of the structure of each first electrode 200 is exposed through the pixel opening 610. At least a portion of the edge of the first electrode 200 extends into the pixel defining portion 600 on the side facing the substrate 100, and the first electrode 200 is used to drive the light-emitting unit 400. Pixel opening 610 includes a first pixel opening 611 and a second pixel opening 612. The first pixel opening 611 is used to set a first light-emitting unit 410, and the second pixel opening 612 is used to set a second light-emitting unit 420. A first electrode 200 exposed through the first pixel opening 611 is used to drive the first light-emitting unit 410, and a first electrode 200 exposed through the second pixel opening 612 is used to drive the second light-emitting unit 420. An isolation structure 300 is disposed on the side of the pixel limiting portion 600 away from the substrate 100. The isolation structure 300 encloses and forms an isolation opening 304 that communicates with the pixel opening 610. Each isolation opening 304 is correspondingly disposed to each pixel opening 610. When the light-emitting layer is fabricated, the fabrication material of the light-emitting layer has a large drop on the side of the isolation structure 300, and the fabrication material of the light-emitting layer breaks on the side of the isolation structure 300, thereby falling into the isolation opening 304 to form the light-emitting unit 400 located in the corresponding pixel opening 610. This eliminates the need for a precision mask, reducing the development and use of precision masks and lowering the fabrication cost.

[0052] The pixel limiting portion 600 has a first sidewall 620 facing the first pixel opening 611 and a second sidewall 630 facing the second pixel opening 612. Along the thickness direction Z of the display panel, the first sidewall 620 has a first end 621 facing the corresponding first electrode 200, and the second sidewall 630 has a second end 631 facing the corresponding first electrode 200. The first light-emitting unit 410 includes a first light-emitting structure 412 and a first carrier layer 411 disposed between the first light-emitting structure 412 and the corresponding first electrode 200. The first carrier layer 411 is in contact with the isolation structure 300 surrounding the first pixel opening 611. The first electrode 200 extends from the first end 621 to the isolation structure 300 through the current transmission path between the first carrier layer 411 and the isolation structure 300. The second light-emitting unit 420 includes a second light-emitting structure 422 and a second sub-carrier layer 421 disposed between the second light-emitting structure 422 and the corresponding first electrode 200. The second sub-carrier layer 421 is in contact with the isolation structure 300 surrounding the second pixel opening 612. The first electrode 200 extends from the second end 631 to the isolation structure 300 through the current transmission path between the second sub-carrier layer 421 and the isolation structure 300. The sheet resistance of the first sub-carrier layer 411 is less than that of the second sub-carrier layer 421. The risk of leakage from the first electrode 200 to the isolation structure 300 through the first sub-carrier layer 411 is greater than that of leakage from the first electrode 200 to the isolation structure 300 through the second sub-carrier layer 421. Along the Z-direction perpendicular to the thickness of the display panel, the minimum distance between the first end 621 and the isolation structure 300 surrounding the first pixel opening 611 on the side facing the substrate 100 is the first distance a, and the minimum distance between the second end 631 and the isolation structure 300 surrounding the second pixel opening 612 on the side facing the substrate 100 is the second distance b. The first distance a is greater than the second distance b, thereby making the current transmission path between the first electrode 200 and the isolation structure 300 located in the first pixel opening 611 longer, thus reducing leakage current between the first electrode 200 exposed in the first pixel opening 611 and the isolation structure 300. The sheet resistance of the second carrier layer 421 is greater than the sheet resistance of the first carrier layer 411. Setting the second distance b to be smaller than the first distance a is beneficial to increasing the opening area of ​​the second pixel opening 612, improving the aperture ratio of the pixel opening 610, improving the display effect of the display panel, and improving the performance of the display panel.

[0053] like Figure 3As shown, in some optional embodiments, the first sub-carrier layer 411 includes a first hole injection layer 411a and a first hole transport layer 411b stacked along the direction away from the substrate 100. The first hole transport layer 411b is in contact with the isolation structure 300. The second sub-carrier layer 421 includes a second hole injection layer 421a and a second hole transport layer 421b stacked along the direction away from the substrate 100. The second hole transport layer 421b is in contact with the isolation structure 300. The sheet resistance of the first hole transport layer 411b is less than the sheet resistance of the second hole transport layer 421b.

[0054] In these optional embodiments, the current in the first electrode 200 is transmitted through the first hole injection layer 411a to the first hole transport layer 411b, which is in contact with the isolation structure 300. The current transmission path between the first electrode 200 and the isolation structure 300 via the first hole transport layer 411b extends from the first end 621 to the isolation structure 300. The current in the first electrode 200 is transmitted through the second hole injection layer 421a to the second hole transport layer 421b, which is in contact with the isolation structure 300. The current transmission path between the first electrode 200 and the isolation structure 300 via the second hole transport layer 421b extends from the second end 631 to the isolation structure 300. The sheet resistance of the first hole transport layer 411b is less than that of the second hole transport layer 421b. Setting the first spacing a to be greater than the second spacing b helps reduce the risk of leakage from the first electrode 200 to the isolation structure 300.

[0055] like Figure 3 As shown, in some optional embodiments, the isolation structure 300 includes a first sub-layer 301, a second sub-layer 302, and a third sub-layer 303. The third sub-layer 303 is disposed between the first sub-layer 301 and the pixel limiting portion 600. The second sub-layer 302 is disposed on the side of the first sub-layer 301 facing away from the substrate 100. Along the thickness direction Z perpendicular to the display panel, the minimum distance between the first end 621 and the third sub-layer 303 is greater than the minimum distance between the second end 631 and the third sub-layer 303.

[0056] In these optional embodiments, the isolation structure 300 includes a third sub-layer 303, a first sub-layer 301, and a second sub-layer 302 stacked in a direction away from the substrate 100. When the first sub-layer 301 is side-etched, the third sub-layer 303 can provide protection to the film layer on the substrate 100 side. The third sub-layer 303 is the side of the isolation structure 300 facing the substrate 100. The third sub-layer 303 is used to contact the hole transport layer 402. The minimum distance between the first end 621 and the third sub-layer 303 is greater than the minimum distance between the second end 631 and the third sub-layer 303, thereby making the current transmission path between the first electrode 200 corresponding to the first pixel opening 611 and the third sub-layer 303 longer, thereby reducing leakage current between the first electrode 200 and the third sub-layer 303 through the first hole transport layer 411b.

[0057] Optional, such as Figure 3 As shown, the first hole transport layer 411b is in contact with the third sublayer 303.

[0058] Optional, such as Figure 3 As shown, the second hole transport layer 421b is in contact with the third sublayer 303.

[0059] like Figure 3 As shown, in some optional embodiments, the orthographic projection of the first sublayer 301 on the substrate 100 lies within the orthographic projection of the second sublayer 302 on the substrate 100.

[0060] In these optional embodiments, the projected area of ​​the side of the first sublayer 301 facing away from the substrate 100 on the substrate 100 is smaller than the projected area of ​​the second sublayer 302 on the substrate 100. The second sublayer 302 covers the surface of the first sublayer 301 near the second sublayer 302. In this case, the first sublayer 301 is recessed relative to the second sublayer 302 in a direction away from the isolation opening 304. During the fabrication process of the light-emitting layer, the fabrication material of the light-emitting layer has a large drop at the edge of the isolation structure 300, and the first sublayer 301 is recessed relative to the second sublayer 302. The fabrication material of the light-emitting layer is difficult to connect at the edge of the isolation structure 300, resulting in breakage. The breakage of the fabrication material of the light-emitting layer forms mutually disconnected light-emitting units 400.

[0061] Optional, such as Figure 3 As shown, the orthographic projection of the first sublayer 301 on the substrate 100 is located within the orthographic projection of the third sublayer 303 on the substrate 100. The orthographic projection area of ​​the first sublayer 301 on the substrate 100 is smaller than the orthographic projection area of ​​the third sublayer 303 on the substrate 100, thereby improving the protective effect of the third sublayer 303 on the side film layer of the substrate 100.

[0062] like Figure 3As shown, in some optional embodiments, the first light-emitting unit 410 is used to emit red light, and the second light-emitting unit 420 is used to emit green light or blue light.

[0063] In these alternative embodiments, the first light-emitting unit 410 is used to emit red light, and the second light-emitting unit 420 is used to emit green or blue light. The sheet resistance of the first hole transport layer 411b of the first light-emitting unit 410 is less than the sheet resistance of the second hole transport layer 421b of the second light-emitting unit 420.

[0064] Optionally, the first spacing 'a' can be 6 micrometers to 11.5 micrometers. The first spacing 'a' can be 6 micrometers, 6.5 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, 10 micrometers, 11 micrometers, 11.5 micrometers, etc.

[0065] Optionally, the second light-emitting unit 420 is used to emit green light, and the second spacing b is 4.5 micrometers to 9 micrometers. The second spacing b can be 4.5 micrometers, 5 micrometers, 6 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, etc.

[0066] Optionally, the second light-emitting unit 420 is used to emit blue light, and the second spacing b is 3 micrometers to 6 micrometers. The second spacing b can be 3 micrometers, 3.5 micrometers, 4 micrometers, 5 micrometers, 5.5 micrometers, 6 micrometers, etc.

[0067] like Figure 3 As shown, in some alternative embodiments, the first light-emitting unit 410 is used to emit green light and the second light-emitting unit 420 is used to emit blue light.

[0068] In these alternative embodiments, the first light-emitting unit 410 is used to emit green light, the second light-emitting unit 420 is used to emit blue light, and the sheet resistance of the first hole transport layer 411b of the first light-emitting unit 410 is less than the sheet resistance of the second hole transport layer 421b of the second light-emitting unit 420.

[0069] Optionally, the first spacing a is 4.5 micrometers to 9 micrometers, and the first spacing a can be 4.5 micrometers, 5 micrometers, 6 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, etc.

[0070] Optionally, the second spacing b is 3 micrometers to 6 micrometers, and the second spacing b can be 3 micrometers, 3.5 micrometers, 4 micrometers, 5 micrometers, 5.5 micrometers, 6 micrometers, etc.

[0071] like Figure 1 and Figure 2As shown, in some optional embodiments, the pixel opening 610 further includes a third pixel opening 613, the pixel limiting portion 600 has a third sidewall 640 facing the third pixel opening 613, and the plurality of light-emitting units 400 further includes a third light-emitting unit 430 located in the third pixel opening 613. The third light-emitting unit 430 includes a third light-emitting structure 432 and a third carrier layer 431 disposed between the third light-emitting structure 432 and the corresponding first electrode 200. The third carrier layer 431 is in contact with the isolation structure 300. The sheet resistance of the third carrier layer 431 is greater than that of the second carrier layer 421. The third sidewall 640 has a third end 641 facing the corresponding first electrode 200. Along the thickness direction Z perpendicular to the display panel, the minimum distance between the third end 641 and the isolation structure 300 facing the substrate 100 is a third distance c, which is less than the second distance b.

[0072] In these alternative embodiments, the third pixel opening 613 is used to set the third light-emitting unit 430. The pixel limiting portion 600 has a third sidewall 640 facing the third pixel opening 613. Along the thickness direction Z of the display panel, the third sidewall 640 has a third end 641 facing the corresponding first electrode 200. The third light-emitting unit 430 includes a third light-emitting structure 432 and a third carrier layer 431 disposed between the third light-emitting structure 432 and the corresponding first electrode 200. The third carrier layer 431 is in contact with the isolation structure 300 surrounding the third pixel opening 613. The first electrode 200 extends from the third end 641 to the isolation structure 300 through the current transmission path between the third carrier layer 431 and the isolation structure 300. The sheet resistance of the third carrier layer 431 is greater than that of the second carrier layer 421. The risk of the first electrode 200 leaking current to the isolation structure 300 through the second carrier layer 421 is greater than that of the first electrode 200 leaking current to the isolation structure 300 through the third carrier layer 431. Along the thickness direction Z perpendicular to the display panel, the minimum distance between the third end 641 and the isolation structure 300 surrounding the third pixel opening 613 on the side facing the substrate 100 is the third distance c. The third distance c is smaller than the second distance b. The current transmission path between the first electrode 200 located in the second pixel opening 612 and the isolation structure 300 is longer, thereby reducing leakage between the first electrode 200 exposed in the second pixel opening 612 and the isolation structure 300 surrounding the second pixel opening 612. The sheet resistance of the third carrier layer 431 is greater than the sheet resistance of the second carrier layer 421. Setting the third distance c to be smaller than the second distance b is beneficial to increasing the opening area of ​​the third pixel opening 613, improving the aperture ratio of the pixel opening 610, improving the display effect of the display panel, and improving the performance of the display panel.

[0073] Optional, such as Figure 3As shown, the third carrier layer 431 includes a third hole injection layer 431a and a third hole transport layer 431b stacked along the direction away from the substrate 100. The third hole transport layer 431b is in contact with the isolation structure 300, and the sheet resistance of the third hole transport layer 431b is greater than that of the second hole transport layer 421b. The current in the first electrode 200 is transmitted to the third hole transport layer 431b through the third hole injection layer 431a. The third hole transport layer 431b is in contact with the isolation structure 300, and the current transmission path between the first electrode 200 and the isolation structure 300 extends from the third end 641 to the isolation structure 300. The sheet resistance of the third hole transport layer 431b is greater than that of the second hole transport layer 421b, and the second spacing b is greater than the third spacing c, which helps to reduce the risk of leakage current from the first electrode 200 to the isolation structure 300.

[0074] like Figure 3 As shown, in some optional embodiments, along the thickness direction Z perpendicular to the display panel, the minimum spacing between the third end 641 and the third sub-layer 303 is less than the minimum spacing between the second end 631 and the third sub-layer 303.

[0075] In these optional embodiments, the third sub-layer 303 is configured to contact the hole transport layer 402, and the minimum spacing between the third end 641 and the third sub-layer 303 is smaller than the minimum spacing between the second end 631 and the third sub-layer 303. This results in a longer current transmission path between the first electrode 200 corresponding to the second pixel opening 612 and the third sub-layer 303, thereby reducing leakage current between the first electrode 200 and the third sub-layer 303 through the second hole transport layer 421b.

[0076] Optional, such as Figure 3 As shown, the third hole transport layer 431b is in contact with the third sublayer 303.

[0077] like Figure 3 As shown, in some other optional embodiments, the first light-emitting unit 410 is used to emit red light, the second light-emitting unit 420 is used to emit green light, and the third light-emitting unit 430 is used to emit blue light.

[0078] In these optional embodiments, the first light-emitting unit 410 is used to emit red light, the second light-emitting unit 420 is used to emit green light, and the third light-emitting unit 430 is used to emit blue light. The sheet resistance of the first hole transport layer 411b of the first light-emitting unit 410 is less than the sheet resistance of the second hole transport layer 421b of the second light-emitting unit 420, and the sheet resistance of the second hole transport layer 421b of the second light-emitting unit 420 is less than the sheet resistance of the third hole transport layer 431b of the third light-emitting unit 430.

[0079] Optionally, the first light-emitting unit 410 is used to emit red light, and the first spacing a is 6 micrometers to 11.5 micrometers. The first spacing a can be 6 micrometers, 6.5 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, 10 micrometers, 11 micrometers, 11.5 micrometers, etc.

[0080] Optionally, the second light-emitting unit 420 is used to emit green light, and the second spacing b is 4.5 micrometers to 9 micrometers. The second spacing b can be 4.5 micrometers, 5 micrometers, 6 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, etc.

[0081] Optionally, the third light-emitting unit 430 is used to emit blue light, and the third spacing c is 3 micrometers to 6 micrometers. The third spacing c can be 3 micrometers, 3.5 micrometers, 4 micrometers, 5 micrometers, 5.5 micrometers, 6 micrometers, etc.

[0082] like Figure 3 As shown, in some optional embodiments, the display panel further includes a second electrode layer, which includes a second electrode 500 located at least partially in each pixel opening 610. The second electrode 500 is disposed on the side of the light-emitting unit 400 away from the substrate 100 and is in contact with the isolation structure 300.

[0083] In these optional embodiments, the second electrode 500 is disposed on the side of the light-emitting unit 400 away from the substrate 100. The second electrode 500 is in contact with the isolation structure 300. The isolation structure 300 separates the second electrode layer to form mutually spaced second electrodes 500. The mutually spaced second electrodes 500 are electrically connected through the isolation structure 300 to form a full-surface electrode, ensuring the normal light emission of the light-emitting unit 400.

[0084] Optional, such as Figure 3 As shown, the second electrode 500 is in contact with the third sub-layer 303. The material of the third sub-layer 303 includes molybdenum, which helps to reduce the resistivity of the third sub-layer 303 and reduce power consumption.

[0085] Optionally, the material of the first sublayer 301 may include aluminum.

[0086] Optionally, the material of the second sublayer 302 includes titanium.

[0087] Optional, such as Figure 3 As shown, the display panel also includes a packaging section 700. The packaging section 700 is disposed within each isolation opening 304 and located on the side of the second electrode 500 away from the substrate 100. The packaging section 700 is used to package the light-emitting unit 400, reducing the intrusion of water, oxygen, etc. into the light-emitting unit 400. The packaging section 700 extends from within the isolation opening 304 to the side of the isolation structure 300 away from the substrate 100, thereby increasing the packaging area of ​​the packaging section and improving the packaging effect.

[0088] Optionally, the light-emitting unit 400 includes a first light-emitting unit 410, a second light-emitting unit 420, and a third light-emitting unit 430, such as... Figure 4 As shown, each light-emitting unit 400 may include a hole injection layer 401 (HIL), a hole transport layer 402 (HTL), a light-emitting structure 403, an electron injection layer 404 (EIL), and an electron transport layer 405 (ETL) sequentially disposed along a direction away from the substrate 100. The hole injection layer 401 includes a first hole injection layer 411a of the first light-emitting unit 410, a second hole injection layer 421a of the second light-emitting unit 420, and a third hole injection layer 431a of the third light-emitting unit 430. The hole transport layer 402 includes a first hole transport layer 411b of the first light-emitting unit 410, a second hole transport layer 421b of the second light-emitting unit 420, and a third hole transport layer 431b of the third light-emitting unit 430.

[0089] The second aspect of this application also provides a method for manufacturing a display panel, such as... Figure 5 As shown, it includes the following steps:

[0090] Step S01: As Figure 6 As shown, a plurality of first electrodes 200 are formed at intervals on one side of the substrate 100.

[0091] Step S02: As Figure 7 As shown, a pixel definition material layer is formed on one side of the substrate 100. The patterned pixel definition material layer forms a pixel limiting portion 600 and a pixel opening 610 formed by the pixel limiting portion 600. At least a portion of the structure of each first electrode 200 is exposed through the pixel opening 610. The pixel opening 610 includes a first pixel opening 611 and a second pixel opening 612. The pixel limiting portion 600 has a first sidewall 620 facing the first pixel opening 611 and a second sidewall 630 facing the second pixel opening 612. The first sidewall 620 has a first end 621 facing the first electrode 200, and the second sidewall 630 has a second end 631 facing the first electrode 200.

[0092] Step S03: As Figure 8As shown, an isolation structure 300 is formed on the side of the pixel limiting portion 600 away from the substrate 100. The isolation structure 300 encloses a plurality of isolation openings 304, which are connected to the pixel openings 610. Along the thickness direction Z perpendicular to the display panel, the minimum distance between the first end 621 and the side of the isolation structure 300 facing the substrate 100 is the first distance a, and the minimum distance between the second end 631 and the side of the isolation structure 300 facing the substrate 100 is the second distance b. The first distance a is greater than the second distance b.

[0093] Step S04: As Figure 2 As shown, a first light-emitting unit 410 is formed in the first pixel opening 611, and a second light-emitting unit 420 is formed in the second pixel opening 612. The first light-emitting unit 410 includes a first light-emitting structure 412 and a first carrier layer 411 disposed between the first light-emitting structure 412 and the first electrode 200. The first carrier layer 411 is in contact with the isolation structure 300. The second light-emitting unit 420 includes a second light-emitting structure 422 and a second carrier layer 421 disposed between the second light-emitting structure 422 and the first electrode 200. The second carrier layer 421 is in contact with the isolation structure 300. The sheet resistance of the first carrier layer 411 is less than the sheet resistance of the second carrier layer 421.

[0094] In this embodiment, the pixel defining portion 600 defines the setting area of ​​each light-emitting unit 400, reducing color crosstalk between the light-emitting units 400. The pixel defining portion 600 covers at least a portion of the edge of the first electrode 200, and each first electrode 200 is exposed through the pixel opening 610. Each isolation opening 304 is correspondingly provided with each pixel opening 610. When the light-emitting layer is fabricated, the fabrication material of the light-emitting layer has a large drop on the side of the isolation structure 300, and the fabrication material of the light-emitting layer breaks on the side of the isolation structure 300, thereby falling into the isolation opening 304 to form the light-emitting unit 400 located in the corresponding pixel opening 610. There is no need to use a precision mask, which can reduce the development and use of precision masks and reduce the fabrication cost. The sheet resistance of the first carrier layer 411 is less than that of the second carrier layer 421. The risk of leakage from the first electrode 200 to the isolation structure 300 through the first carrier layer 411 is greater than that of leakage from the first electrode 200 to the isolation structure 300 through the second carrier layer 421. Along the thickness direction Z perpendicular to the display panel, the minimum distance between the first end 621 and the isolation structure 300 surrounding the first pixel opening 611 and facing the substrate 100 is the first distance a, and the minimum distance between the second end 631 and the isolation structure 300 surrounding the second pixel opening 612 and facing the substrate 100 is the second distance b. The first distance a is greater than the second distance b, thereby making the current transmission path between the first electrode 200 located in the first pixel opening 611 and the isolation structure 300 longer, thereby reducing the leakage current between the first electrode 200 exposed in the first pixel opening 611 and the isolation structure 300.

[0095] In some alternative embodiments, such as Figure 7 As shown, the pixel opening 610 also includes a third pixel opening 613, and the pixel limiting portion 600 also has a third sidewall 640 facing the third pixel opening 613, and the third sidewall 640 has a third end 641 facing the first electrode 200.

[0096] In step S03, as Figure 8 As shown, it also includes: along the thickness direction Z perpendicular to the display panel, the minimum distance between the third end 641 and the side of the isolation structure 300 facing the substrate 100 is the third distance c, and the third distance c is less than the second distance b.

[0097] In step S04, as Figure 2 As shown, it also includes: a third light-emitting unit 430 in the third pixel opening 613, the third light-emitting unit 430 includes a third light-emitting structure 432 and a third carrier layer 431 disposed between the third light-emitting structure 432 and the first electrode 200, the third carrier layer 431 is in contact with the isolation structure 300, and the sheet resistance of the third carrier layer 431 is greater than the sheet resistance of the second carrier layer 421.

[0098] In these alternative embodiments, the sheet resistance of the second sub-layer 421 is less than that of the third sub-layer 431, and the risk of leakage from the first electrode 200 to the isolation structure 300 through the second sub-layer 421 is greater than that of leakage from the first electrode 200 to the isolation structure 300 through the third sub-layer 431. Along the thickness direction Z perpendicular to the display panel, the minimum distance between the third end 641 and the isolation structure 300 surrounding the third pixel opening 613 on the side facing the substrate 100 is the third distance c, and the second distance b is greater than the third distance c. This results in a longer current transmission path between the first electrode 200 located at the second pixel opening 612 and the isolation structure 300, thereby reducing leakage between the first electrode 200 exposed at the second pixel opening 612 and the isolation structure 300.

[0099] The third aspect of this application also provides a display device, including the display panel of any of the first aspects described above, or the display panel manufactured by the manufacturer of the second aspect embodiment. Since the display device provided by the third aspect of this application includes the display panel of any of the first or second aspects described above, the display device provided by the third aspect of this application has the beneficial effects of the display panel of any of the first or second aspects described above, which will not be elaborated further here.

[0100] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0101] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; A first electrode layer is disposed on one side of the substrate and includes a plurality of spaced-apart first electrodes. A pixel definition layer is disposed on one side of the substrate. The pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion. At least a portion of the structure of each first electrode is exposed through the pixel opening. The pixel opening includes a first pixel opening and a second pixel opening. The pixel defining portion has a first sidewall facing the first pixel opening and a second sidewall facing the second pixel opening. An isolation structure is disposed on the side of the pixel defining portion away from the substrate, and the isolation structure encloses and forms a plurality of isolation openings, which are connected to the pixel openings; The light-emitting layer includes a plurality of light-emitting units, wherein the plurality of light-emitting units include a first light-emitting unit located in a first pixel opening and a second light-emitting unit located in a second pixel opening. The first light-emitting unit includes a first light-emitting structure and a first charge carrier layer disposed between the first light-emitting structure and a corresponding first electrode. The first charge carrier layer is in contact with the isolation structure. The second light-emitting unit includes a second light-emitting structure and a second charge carrier layer disposed between the second light-emitting structure and a corresponding first electrode. The second charge carrier layer is in contact with the isolation structure. Wherein, the sheet resistance of the first sub-layer is less than that of the second sub-layer, the first sidewall has a first end facing the side corresponding to the first electrode, the second sidewall has a second end facing the side corresponding to the first electrode, along the thickness direction perpendicular to the display panel, the minimum distance between the first end and the isolation structure facing the substrate is a first distance, the minimum distance between the second end and the isolation structure facing the substrate is a second distance, and the first distance is greater than the second distance.

2. The display panel according to claim 1, characterized in that, The first charge carrier layer includes a first hole injection layer and a first hole transport layer stacked in a direction away from the substrate. The first hole transport layer is in contact with the isolation structure. The second charge carrier layer includes a second hole injection layer and a second hole transport layer stacked in a direction away from the substrate. The second hole transport layer is in contact with the isolation structure. The sheet resistance of the first hole transport layer is less than the sheet resistance of the second hole transport layer.

3. The display panel according to claim 2, characterized in that, The isolation structure includes a first sub-layer, a second sub-layer, and a third sub-layer. The third sub-layer is disposed between the first sub-layer and the pixel defining portion. The second sub-layer is disposed on the side of the first sub-layer facing away from the substrate. Along the thickness direction perpendicular to the display panel, the minimum distance between the first end and the third sub-layer is greater than the minimum distance between the second end and the third sub-layer. Preferably, the first hole transport layer is in contact with the third sublayer, and / or the second hole transport layer is in contact with the third sublayer; Preferably, the material of the third sublayer includes molybdenum; Preferably, the material of the first sublayer includes aluminum; Preferably, the material of the second sublayer includes titanium.

4. The display panel according to claim 3, characterized in that, The orthographic projection of the first sublayer onto the substrate lies within the orthographic projection of the second sublayer onto the substrate; Preferably, the orthographic projection of the first sublayer on the substrate lies within the orthographic projection of the third sublayer on the substrate.

5. The display panel according to claim 1, characterized in that, The first light-emitting unit is used to emit red light, and the second light-emitting unit is used to emit green or blue light; Preferably, the first spacing is 6 micrometers to 11.5 micrometers; Preferably, the second light-emitting unit is used to emit green light, and the second spacing is 4.5 micrometers to 9 micrometers; Preferably, the second light-emitting unit is used to emit blue light, and the second spacing is 3 micrometers to 6 micrometers.

6. The display panel according to claim 1, characterized in that, The first light-emitting unit is used to emit green light, and the second light-emitting unit is used to emit blue light; Preferably, the first spacing is 4.5 micrometers to 9 micrometers; Preferably, the second spacing is 3 micrometers to 6 micrometers.

7. The display panel according to claim 3, characterized in that, The pixel opening further includes a third pixel opening, and the pixel defining portion has a third sidewall facing the third pixel opening. The plurality of light-emitting units further include a third light-emitting unit located in the third pixel opening. The third light-emitting unit includes a third light-emitting structure and a third carrier layer disposed between the third light-emitting structure and the corresponding first electrode. The third carrier layer is disposed in contact with the isolation structure. Wherein, the sheet resistance of the third sub-layer is greater than that of the second sub-layer, the third sidewall has a third end facing the side corresponding to the first electrode, along the thickness direction perpendicular to the display panel, the minimum distance between the third end and the side of the isolation structure facing the substrate is the third distance, and the third distance is less than the second distance; Preferably, the third sublayer includes a third hole injection layer and a third hole transport layer stacked in a direction away from the substrate, the third hole transport layer being in contact with the isolation structure, and the sheet resistance of the third hole transport layer being greater than that of the second hole transport layer.

8. The display panel according to claim 7, characterized in that, Along the thickness direction perpendicular to the display panel, the minimum spacing between the third end and the third sub-layer is less than the minimum spacing between the second end and the third sub-layer; Preferably, the third hole transport layer is in contact with the third sublayer.

9. The display panel according to claim 7, characterized in that, The first light-emitting unit is used to emit red light, the second light-emitting unit is used to emit green light, and the third light-emitting unit is used to emit blue light.

10. The display panel according to claim 9, characterized in that, Along the thickness direction perpendicular to the display panel, the minimum spacing between the first end and the third sub-layer is 6 micrometers to 11.5 micrometers; And / or, the minimum spacing between the second end and the third sublayer is 4.5 micrometers to 9 micrometers; And / or, the minimum spacing between the third end and the third sublayer is 3 micrometers to 6 micrometers.

11. The display panel according to claim 1, characterized in that, The display panel further includes a second electrode layer, which includes a second electrode located at least partially in each of the pixel openings. The second electrode is disposed on the side of the light-emitting unit away from the substrate and is in contact with the isolation structure.

12. A method for manufacturing a display panel, characterized in that, include: Multiple spaced first electrodes are formed on one side of the substrate; A pixel definition material layer is formed on one side of the substrate, and the pixel definition material layer is patterned to form a pixel defining portion and a pixel opening formed by the pixel defining portion. At least a portion of the structure of each first electrode is exposed through the pixel opening. The pixel opening includes a first pixel opening and a second pixel opening. The pixel defining portion has a first sidewall facing the first pixel opening and a second sidewall facing the second pixel opening. The first sidewall has a first end facing the first electrode, and the second sidewall has a second end facing the first electrode. An isolation structure is formed on the side of the pixel defining portion away from the substrate. The isolation structure encloses and forms a plurality of isolation openings. The isolation openings are connected to the pixel openings. Along the thickness direction perpendicular to the display panel, the minimum distance between the first end and the side of the isolation structure facing the substrate is a first distance, and the minimum distance between the second end and the side of the isolation structure facing the substrate is a second distance. The first distance is greater than the second distance. A first light-emitting unit is formed in the first pixel opening, and a second light-emitting unit is formed in the second pixel opening. The first light-emitting unit includes a first light-emitting structure and a first charge carrier layer disposed between the first light-emitting structure and the first electrode. The first charge carrier layer is in contact with the isolation structure. The second light-emitting unit includes a second light-emitting structure and a second charge carrier layer disposed between the second light-emitting structure and the first electrode. The second charge carrier layer is in contact with the isolation structure. The sheet resistance of the first charge carrier layer is less than the sheet resistance of the second charge carrier layer.

13. The manufacturing method according to claim 12, characterized in that, The pixel opening further includes a third pixel opening, and the pixel defining portion further has a third sidewall facing the third pixel opening, the third sidewall having a third end facing the first electrode. The step of forming an isolation structure on the side of the pixel limiting portion away from the substrate further includes: along the thickness direction perpendicular to the display panel, the minimum distance between the third end and the side of the isolation structure facing the substrate is a third distance, and the third distance is smaller than the second distance; The step of forming a first light-emitting unit in the first pixel opening and forming a second light-emitting unit in the second pixel opening further includes: a third light-emitting unit in the third pixel opening, the third light-emitting unit including a third light-emitting structure and a third carrier layer disposed between the third light-emitting structure and the first electrode, the third carrier layer being in contact with the isolation structure, and the sheet resistance of the third carrier layer being greater than the sheet resistance of the second carrier layer.

14. A display device, characterized in that, It includes the display panel according to any one of claims 1-11, or the display panel prepared by the manufacturing method according to any one of claims 12-13.

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