Display panel, manufacturing method thereof and display device

Abstract

The invention discloses a display panel and a manufacturing method thereof and a display device.The display panel comprises a substrate, a pixel definition layer and a plurality of light-emitting units, and the light-emitting units are arranged on the substrate and located in opening areas respectively; the display panel further comprises a conductive partition structure, the conductive partition structure is located in the non-opening area and arranged on the pixel definition layer, and the conductive partition structure is used for partitioning two adjacent light-emitting units. Each light-emitting unit comprises a first organic light-emitting unit and a second organic light-emitting unit, and the first organic light-emitting unit and the second organic light-emitting unit are stacked in parallel. When the first organic light-emitting unit and the second organic light-emitting unit which are stacked and arranged in parallel are formed by using the conductive partition structure, the driving voltage of the stacked light-emitting units is reduced, and the light-emitting efficiency of the light-emitting units is improved.

Description

Technical Field

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

[0002] OLED (Organic Light Emitting Diode) display devices are widely used in various fields because of their light weight, wide viewing angle, fast response, low-temperature resistance, high luminous efficiency, and the ability to prepare curved flexible display screens. Due to the increasingly mature mass production technology, OLED display panels have gradually become the mainstream display panels.

[0003] With the continuous increase of user requirements and application scenarios, such as the application of medium and large sizes, the requirements for efficiency and lifespan are getting higher and higher. The efficiency of a single-layer OLED device can no longer meet the requirements. Therefore, in the industry, a tandem OLED device structure is adopted to improve the efficiency, that is, two OLED organic light-emitting units are stacked together at each light-emitting unit position, and a charge generation layer is used to transfer the carriers (electrons and holes) in the device to the upper and lower two light-emitting layers and recombine and emit light in the two light-emitting layers respectively. However, this tandem structure has problems of low luminous efficiency and high required luminous voltage. Summary of the Invention

[0004] The purpose of the present application is to provide a display panel, a manufacturing method thereof, and a display device. When the present application uses a conductive partition structure to form a parallel stacked first organic light-emitting unit and second organic light-emitting unit, the driving voltage of the stacked light-emitting units is reduced, and the luminous efficiency of the light-emitting units is improved.

[0005] The present application discloses a display panel, including a substrate, a pixel definition layer, and a plurality of light-emitting units. The pixel definition layer is disposed on the substrate and is provided with a plurality of opening regions. The plurality of light-emitting units are disposed on the substrate and are respectively located in the opening regions. The display panel further includes a conductive partition structure, which is located in a non-opening region and is disposed on the pixel definition layer. The conductive partition structure is used to partition two adjacent light-emitting units. Each light-emitting unit includes a first organic light-emitting unit and a second organic light-emitting unit, and the first organic light-emitting unit and the second organic light-emitting unit are formed by parallel stacking.

[0006] Optionally, the first organic light-emitting unit is disposed on a side of the second organic light-emitting unit close to the substrate; the first organic light-emitting unit includes a first bottom electrode, a first light-emitting functional layer, and a first top electrode that are sequentially disposed away from the substrate; the second organic light-emitting unit includes a second bottom electrode, a second light-emitting functional layer, and a second top electrode that are sequentially disposed away from the substrate; the second bottom electrode and the first top electrode share a transparent common electrode, and the first organic light-emitting unit and the second organic light-emitting unit are connected in parallel through the transparent common electrode.

[0007] Optionally, the first light-emitting functional layer includes a first hole transport layer, a first light-emitting layer, and a first electron transport layer, and the second light-emitting functional layer includes a second hole transport layer, a second light-emitting layer, and a second electron transport layer; the first hole transport layer is disposed on the first bottom electrode, the first light-emitting layer is disposed on the first hole transport layer, the first electron transport layer is disposed on the first light-emitting layer, the second electron transport layer is disposed on the second bottom electrode, the second light-emitting layer is disposed on the second electron transport layer, the second hole transport layer is disposed on the second light-emitting layer, the first bottom electrode and the second top electrode are anodes, and the first top electrode and the second bottom electrode are cathodes; or the first electron transport layer is disposed on the first bottom electrode, the first light-emitting layer is disposed on the first electron transport layer, the first hole transport layer is disposed on the first light-emitting layer, the second hole transport layer is disposed on the second bottom electrode, the second light-emitting layer is disposed on the second hole transport layer, the second electron transport layer is disposed on the second light-emitting layer, the first bottom electrode and the second top electrode are cathodes, and the first top electrode and the second bottom electrode are anodes.

[0008] Optionally, one of the first bottom electrode and the second top electrode is a reflective electrode, and the other is a transmissive electrode; when the display panel is a bottom-emitting display panel, the first bottom electrode is a transmissive electrode, formed of one or more of magnesium material, silver material or transmissive metal oxide, and the second top electrode is a reflective electrode, formed of one or two of magnesium material and silver material; wherein, the thickness of the first bottom electrode is less than that of the second top electrode; when the display panel is a top-emitting display panel, the first bottom electrode is a reflective electrode, formed of one or two of magnesium material and silver material, and the second top electrode is a transmissive electrode, formed of one or more of magnesium material, silver material or transmissive metal oxide; wherein, the thickness of the first bottom electrode is greater than that of the second top electrode; within each of the light-emitting units, the first bottom electrode is connected to the second top electrode; the conductive partition structure includes a first conductive partition structure and a second partition structure arranged vertically, and the first conductive partition structure and the second conductive partition structure are insulated from each other; the first conductive partition structure is used to connect the common transmissive electrodes in two adjacent light-emitting units; the second conductive partition structure is used to connect the first bottom electrode and the second top electrode.

[0009] Optionally, the first conductive partition structure includes a first conductive portion and a first partition portion, the first partition portion is arranged on the first conductive portion, and the radial width of the first partition portion is greater than that of the first conductive portion; the first conductive partition structure is used to partition the common transmissive electrode shared by the first bottom electrode, the first light-emitting functional layer, the first top electrode and the second bottom electrode, and the second light-emitting functional layer; the first conductive portion is used to electrically connect the common transmissive electrodes in two adjacent light-emitting units, and the second top electrode and the conductive portion are separated by the second light-emitting functional layer; the second conductive partition structure includes a second conductive portion and a second partition portion, the second partition portion is arranged on the second conductive portion, and the radial width of the second partition portion is greater than that of the second conductive portion; the second conductive portion is connected to the second top electrode, and the second conductive portion passes through the pixel definition layer and is connected to the first bottom electrode.

[0010] Optionally, the conductive partition structure is further configured to partially partition the second light-emitting functional layer; the second light-emitting functional layer includes a second hole transport layer, a second light-emitting layer, and a second electron transport layer; wherein, when the second hole transport layer is disposed on the second light-emitting layer, the conductive partition structure is configured to partition the second electron transport layer and the second light-emitting layer, the second hole transport layer is not partitioned by the conductive partition structure, and the second hole transport layer separates the second top electrode from the conductive portion; or when the second electron transport layer is disposed on the second light-emitting layer; the conductive partition structure is configured to partition the second hole transport layer and the second light-emitting layer, the second electron transport layer is not partitioned by the conductive partition structure, and the second electron transport layer separates the second top electrode from the conductive portion.

[0011] The present application also discloses a method for manufacturing a display panel, including the steps of:

[0012] Providing a substrate;

[0013] Forming a pixel definition layer on the substrate, and forming a plurality of opening regions on the pixel definition layer;

[0014] Forming a conductive partition structure on the pixel definition layer, the conductive partition structure being located in a non-opening region;

[0015] Utilizing the conductive partition structure, sequentially depositing a light-emitting unit over the entire surface in the opening region;

[0016] Wherein, each of the light-emitting units includes a first organic light-emitting unit and a second organic light-emitting unit, and the first organic light-emitting unit and the second organic light-emitting unit are formed in parallel stacking.

[0017] Optionally, the step of forming a conductive partition structure on the pixel definition layer, the conductive partition structure being located in a non-opening region includes:

[0018] Sequentially forming a conductive portion material layer and a partition portion material layer on the pixel definition layer;

[0019] Etching the partition portion material layer to form a partition portion;

[0020] Using the partition portion as a protection layer to etch the conductive portion, such that a radial width of the partition portion is greater than a radial width of the conductive portion, to form a conductive partition structure;

[0021] The step of utilizing the conductive partition structure to sequentially deposit a light-emitting unit over the entire surface in the opening region includes:

[0022] Sequentially depositing a first bottom electrode, a first light-emitting functional layer, a transmissive common electrode, a second light-emitting functional layer, and a second top electrode over the entire surface;

[0023] The first bottom electrode, the first light-emitting functional layer, the transparent common electrode, and part of the second light-emitting functional layer between two adjacent opening regions are separated by the conductive partition structure, and the second top electrode is not separated by the conductive partition structure.

[0024] Optionally, the conductive partition structure is further configured to partially separate the second light-emitting functional layer; the second light-emitting functional layer includes a second hole transport layer, a second light-emitting layer, and a second electron transport layer; wherein, when the second hole transport layer is disposed on the second light-emitting layer, the conductive partition structure is configured to separate the second electron transport layer from the second light-emitting layer, and the second hole transport layer is not separated by the conductive partition structure, and the second hole transport layer separates the second top electrode from the conductive portion; or when the second electron transport layer is disposed on the second light-emitting layer; the conductive partition structure is configured to separate the second hole transport layer from the second light-emitting layer, and the second electron transport layer is not separated by the conductive partition structure, and the second electron transport layer separates the second top electrode from the conductive portion; the second top electrode and the conductive portion are separated by the second light-emitting functional layer; the thickness of the conductive portion in the conductive partition structure is between 0.1 um and 1.5 um, and the thickness of the partition portion is between 0.03 um and 0.2 um.

[0025] The present application also discloses a display device, including a driving circuit and the above-mentioned display panel, wherein the driving circuit is configured to drive the display panel to display.

[0026] The present application forms a light-emitting unit through a conductive partition structure, and uses the conductive partition structure to partition the light-emitting unit. The light-emitting unit is formed by stacking two organic light-emitting units. The present application adopts a parallel connection method, and the two organic light-emitting units share an electrode on one side. Electrons or holes are provided for the first organic light-emitting unit and the second organic light-emitting unit on both sides through the common electrode, so that both the first organic light-emitting unit and the second organic light-emitting unit emit light, thereby improving the light-emitting brightness per unit area. The driving voltage of the light-emitting unit is also reduced by the parallel connection method. When the present application uses the conductive partition structure to form the stacked first organic light-emitting unit and second organic light-emitting unit, especially when forming the light-emitting functional layers in the first organic light-emitting unit and the second organic light-emitting unit, they can be formed in the same vacuum environment, and it is not necessary to etch each film layer, avoiding the problem of low light-emitting efficiency of the organic light-emitting unit caused by etching. Description of the Drawings

[0027] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, illustrate the implementation manners of the present application, and explain the principles of the present application together with the written description. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0028] Figure 1 is a schematic diagram of a display panel according to the first embodiment of the present application;

[0029] Figure 2 is Figure 1 a schematic cross-sectional view along the AA cutting line;

[0030] Figure 3 is a schematic diagram of a light-emitting unit of the present application;

[0031] Figure 4 is a top view schematic diagram of a display panel according to the second embodiment of the present application;

[0032] Figure 5 is Figure 4 a schematic cross-sectional view along the BB cutting line in ;

[0033] Figure 6 is Figure 4 a schematic cross-sectional view along the CC cutting line in ;

[0034] Figure 7 is a schematic diagram of a light-emitting unit of a display panel according to the second embodiment of the present application;

[0035] Figure 8 is a schematic diagram of the steps of a manufacturing method of a display panel of the present application;

[0036] Figure 9 is a schematic diagram of the manufacturing process of a display panel of the present application;

[0037] Figure 10 is a schematic diagram of a display device of the present application.

[0038] Among them, 100 is a display panel; 101 is an opening area; 102 is a non-opening area; 110 is a substrate; 120 is a pixel definition layer; 130 is a conductive partition structure; 1301 is a first conductive partition structure; 1302 is a second conductive partition structure; 131 is a conductive part; 1311 is a first conductive part; 1312 is a second conductive part; 132 is a partition part; 1321 is a first partition part; 1322 is a second partition part; 140 is a light-emitting unit; 150 is a first organic light-emitting unit; 151 is a first bottom electrode; 152 is a first light-emitting functional layer; 153 is a first hole transport layer; 154 is a first light-emitting layer; 155 is a first electron transport layer; 156 is an electron injection layer; 157 is an electron blocking layer; 158 is a hole injection layer; 159 is a hole blocking layer; 160 is a second organic light-emitting unit; 161 is a transparent common electrode; 162 is a second light-emitting functional layer; 163 is a second top electrode; 164 is a second electron transport layer; 165 is a second light-emitting layer; 166 is a second hole transport layer; 167 is an auxiliary electrode; 200 is a display device; 210 is a driving circuit. Detailed implementation manners

[0039] It should be understood that the terms, specific structures and functional details disclosed herein are only for the purpose of describing specific embodiments, which are representative, but the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments set forth herein.

[0040] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating relative importance or implicitly indicating the number of the indicated technical features. Thus, unless otherwise specified, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; the meaning of "plurality" is two or more. In addition, the terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "vertical", "horizontal", etc. are described based on the orientation or relative positional relationship shown in the drawings, and are only for the convenience of describing the present application in a simplified manner, rather than indicating that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0041] The present application will be described in detail below with reference to the accompanying drawings and optional embodiments.

[0042] Figure 1 It is a schematic diagram of the display panel according to the first embodiment of the present application. Figure 2 is Figure 1 a cross-sectional schematic diagram along the AA cutting line. See Figure 1-2As shown in the figure, the present application discloses a display panel 100, which includes a substrate substrate 110, a pixel definition layer 120, and a plurality of light-emitting units 140. The pixel definition layer 120 is disposed on the substrate substrate 110 and is provided with a plurality of opening regions 101. A plurality of the light-emitting units 140 are disposed on the substrate substrate 110 and are respectively located within the opening regions 101. The display panel 100 further includes a conductive partition structure 130, which is located in a non-opening region 102 and is disposed on the pixel definition layer 120. The conductive partition structure 130 is used to partition two adjacent light-emitting units 140. Each light-emitting unit 140 includes a first organic light-emitting unit 150 and a second organic light-emitting unit 160, and the first organic light-emitting unit 150 and the second organic light-emitting unit 160 are formed in a parallel stacked manner.

[0043] In the present application, the light-emitting unit 140 is formed by the conductive partition structure 130, and the conductive partition structure 130 is used to partition the light-emitting unit 140. The light-emitting unit 140 is formed by stacking two organic light-emitting units 140. In the present application, a parallel connection method is adopted, and the two organic light-emitting units 140 share an electrode on one side. The common electrode provides electrons or holes for the first organic light-emitting unit 150 and the second organic light-emitting unit 160 on both sides, so that both the first organic light-emitting unit 150 and the second organic light-emitting unit 160 emit light, thereby improving the light-emitting brightness per unit area. The driving voltage of the light-emitting unit 140 is also reduced by the parallel connection method. When the conductive partition structure 130 is used to form the stacked first organic light-emitting unit 150 and second organic light-emitting unit 160 in the present application, especially when forming the light-emitting functional layers in the first organic light-emitting unit 150 and the second organic light-emitting unit 160, they can be formed in the same vacuum environment, and there is no need to etch each film layer, avoiding the problem of low light-emitting efficiency of the organic light-emitting unit 140 caused by etching.

[0044] Specifically, the conductive partition structure 130 includes a conductive portion 131 and a partition portion 132. The partition portion 132 is disposed on the conductive portion 131, and the radial width of the partition portion 132 is greater than the radial width of the conductive portion 131.

[0045] The conductive partition structure 130 in this embodiment is the conductive partition structure 130 used in the maskless evaporation technology, also known as the overhang structure. The conductive partition structure 130 is disposed on the pixel definition layer 120 and is formed before the light-emitting unit 140 is formed. When forming the light-emitting unit 140, the conductive partition structure 130 is utilized to form the stacked first organic light-emitting unit 150 and second organic light-emitting unit 160 in each opening region 101. The specific process of forming the conductive partition structure 130 includes, before forming the light-emitting unit 140 and after forming the pixel definition layer 120, by forming a conductive portion 131 and a partition portion 132 in the non-opening region 102, the width of the partition portion 132 is greater than the width of the conductive portion 131. By mainly using the side etching phenomenon in etching, the conductive portion 131 below the partition portion 132 is etched more, thereby forming an overhang structure in which the width of the upper partition portion 132 is greater than the width of the lower conductive portion 131.

[0046] Figure 3 It is a schematic diagram of the light-emitting unit of the present application. Refer to Figure 3 As shown, specifically, the first organic light-emitting unit 150 is disposed on one side of the second organic light-emitting unit 160 close to the substrate 110; the first organic light-emitting unit 150 includes a first bottom electrode 151, a second light-emitting functional layer 152, and a first top electrode that are gradually arranged away from the substrate 110; the second organic light-emitting unit 160 includes a second bottom electrode, a second light-emitting functional layer 162, and a second top electrode 163 that are gradually arranged away from the substrate 110; the second bottom electrode and the first top electrode share a transparent common electrode 161.

[0047] In this embodiment, the electrodes between the first organic light-emitting unit 150 and the second organic light-emitting unit 160, such as the first top electrode and the second bottom electrode, share a transparent common electrode 161. When the specified voltage is applied to the transparent common electrode 161, the first organic light-emitting unit 150 and the second organic light-emitting unit 160 are simultaneously driven to emit light. For example, a voltage difference is generated with the first bottom electrode 151 to drive the second light-emitting functional layer 152 to emit light, and a voltage difference is generated with the second top electrode 163 to drive the second light-emitting functional layer 162 to emit light. Through the transparent common electrode 161, the first organic light-emitting unit 150 and the second organic light-emitting unit 160 are connected in parallel. Compared with the light-emitting unit 140 in which two organic light-emitting units 140 are connected in parallel, the voltage required for the parallel-connected light-emitting unit 140 is higher, and it requires twice or even higher voltage to drive the two parallel-connected organic light-emitting units 140 to emit light simultaneously. In this embodiment, the parallel connection enables the voltage required to drive the two organic light-emitting units 140 not to be twice the voltage, and it also has better luminous efficiency.

[0048] In this embodiment, the stacked light-emitting units 140 are formed by using the conductive partition structure 130. For example, the conductive partition structure 130 is used to partition the first bottom electrode 151, the second light-emitting functional layer 152, the transparent common electrode 161 shared by the first top electrode and the second bottom electrode, the second light-emitting functional layer 162, etc. In the conductive partition structure 130, the conductive portion 131 is generally formed of a metal material, and the partition portion 132 is generally formed of an insulating material. The conductive portion 131 is formed of the same metal material as that used for forming thin-film transistors, data lines, scan lines, etc. on the substrate 110, and the partition portion 132 is formed of a material such as silicon oxide, silicon nitride, or silicon oxynitride.

[0049] It is worth mentioning that the conductive portion 131 in the conductive partition structure 130 is also used to connect the common transparent electrodes in two adjacent light-emitting units 140.

[0050] Under the action of the conductive partition structure 130, the common transparent electrode will form independent and non-connected electrode blocks in each opening area 101. Generally, the common transparent electrodes in one light-emitting unit 140 formed by stacking two organic light-emitting units 140 are formed as a whole surface, and a preset voltage can be provided. However, since the common transparent electrode generally needs to be formed of a transparent conductive material, such as indium tin oxide or indium zinc oxide, etc., the resistance of this type of material is relatively high, and the impedance unevenness at different positions is likely to occur. Therefore, another advantage of the conductive partition structure 130 in this embodiment is that it connects the common transparent electrodes at the positions of each opening area 101. The conductive partition structure 130 is a mesh structure on the display panel 100, which is consistent with the orthographic projection of the non-opening area 102 on the substrate 110, and there are multiple conductive lines intersecting horizontally and vertically on the display panel 100. In this embodiment, the conductive performance of the conductive portion 131 in the conductive partition structure 130 is utilized. Since the conductive portion 131 has a lower impedance and higher conductivity compared with the common transparent electrode, the same voltage signal is provided for the common transparent electrode in each opening area 101, and the voltages of the common transparent electrodes at different positions are more consistent, thereby improving the impedance unevenness caused by the common transparent electrode and the phenomenon of different light-emitting brightness of different light-emitting units 140.

[0051] In this application, a light-emitting unit 140 is formed by stacking two organic light-emitting units 140. The common transparent electrode needs to provide carriers (electrons or holes) to the first organic light-emitting unit 150 and the second organic light-emitting unit 160 respectively, so that the second light-emitting functional layer 152 and the second light-emitting functional layer 162 emit light. In this embodiment, by providing the transparent common electrode 161 as the electrode of the first organic light-emitting unit 150 and the second organic unit respectively, the transparent common electrode provides electrons or holes respectively, and then transmits them into the first organic light-emitting unit and the second organic light-emitting unit. The holes or electrons injected by the first bottom electrode or the second top electrode are combined in the light-emitting layer to drive the first organic light-emitting unit 150 and the second organic light-emitting unit 160 to emit light respectively, improving the light-emitting efficiency of the first organic light-emitting unit 150 and the second organic light-emitting unit 160, and not increasing the driving voltage of the light-emitting unit 140.

[0052] In one embodiment, the second light-emitting functional layer 152 includes a first hole transport layer 153, a first light-emitting layer 154, and a first electron transport layer 155; the first hole transport layer 153 is disposed on the first bottom electrode 151, the first light-emitting layer 154 is disposed on the first hole transport layer 153, and the first electron transport layer 155 is disposed on the first light-emitting layer 154; the second light-emitting functional layer 162 includes a second hole transport layer 166, a second light-emitting layer 165, and a second electron transport layer 164; the second electron transport layer 164 is disposed on the second bottom electrode, the second light-emitting layer 165 is disposed on the second electron transport layer 164, and the second hole transport layer 166 is disposed on the second light-emitting layer 165. In this embodiment, the second light-emitting functional layer 152 and the second light-emitting functional layer 162 are respectively set in a normal scheme and an inverted scheme. Among them, the second light-emitting functional layer 152 is set in a normal manner, that is, the first hole transport layer 153 is closer to the first bottom electrode 151 side, and the second light-emitting functional layer 162 is set in an inverted manner, that is, the second hole transport layer 166 is closer to the second top electrode 163 side.

[0053] Specifically, the first bottom electrode 151 and the second top electrode 163 are anodes, and the first top electrode and the second bottom electrode are cathodes. In the second light-emitting functional layer 152 and the second light-emitting functional layer 162, in this embodiment, the electron transport layer is connected to the cathode through the electron injection layer 156, and a hole blocking layer 159 is further disposed between the electron transport layer and the light-emitting layer. The hole transport layer is connected to the anode through the hole injection layer 158, and an electron blocking layer 157 is further disposed between the hole transport layer and the light-emitting layer. Among them, the inversion of the light-emitting functional layer means that the electron transport layer is disposed on the side close to the cathode, and the hole transport layer is disposed on the side close to the anode. It is completely opposite to the light-emitting functional layer in the light-emitting unit 140 of the normal organic light-emitting display panel 100.

[0054] In this embodiment, the first bottom electrode 151 provides a driving voltage for the first hole transport layer 153, so that the hole injection layer 158 between the first bottom electrode 151 and the first hole transport layer 153 transports holes to the first light-emitting layer 154; the first top electrode provides a driving voltage for the first electron transport layer 155, so that the electron injection layer 156 between the first top electrode and the first electron transport layer 155 transports electrons to the first light-emitting layer 154. When the electrons and holes in the first light-emitting layer 154 recombine to emit light, the light emission of the first organic light-emitting unit 150 is realized. The same applies to the second organic light-emitting unit 160, but the light-emitting functional layers of the second organic light-emitting unit 160 are arranged in an inverted manner, that is, the electron transport layer is arranged below the hole transport layer. That is, in the second organic light-emitting unit 160, electrons are generated from the second bottom electrode side, and holes are generated from the second top electrode 163 side, so that the second light-emitting layer 165 emits light.

[0055] In this embodiment, one of the first bottom electrode 151 and the second top electrode 163 is a reflective electrode, and the other is a transmissive electrode. The light-emitting unit 140 of the present application can be used as the top-emitting display panel 100 or can also be applied to the bottom-emitting display panel 100.

[0056] When the display panel 100 is a top-emitting display panel 100, the first bottom electrode 151 is a reflective electrode, formed by one or both of magnesium material and silver material, and the second top electrode 163 is a transmissive electrode, formed by one or more of magnesium material, silver material or transmissive metal oxide; wherein, the thickness of the first bottom electrode 151 is greater than the thickness of the second top electrode 163. In this embodiment, the transmissive common electrode 161 corresponding to different light-emitting units 140 and the second top electrode 163 have the same voltage, and different light-emitting effects are achieved by controlling the first bottom electrode 151 in each light-emitting unit 140.

[0057] Figure 4 It is a top view schematic diagram of the display panel according to the second embodiment of the present application. Figure 5 is Figure 4 a cross-sectional schematic diagram along the BB cutting line in Figure 6 is Figure 4Cross-sectional schematic diagram along the CC cutting line; On the above basis, in this embodiment, the conductive partition structure is divided into a first conductive partition structure 1301 and a second conductive partition structure 1302, and the material compositions of the two are the same. That is, the first conductive partition structure 1301 includes a first conductive part 1311 and a first partition part 1321. The first partition part 1321 is disposed on the first conductive part 1311, and the radial width of the first partition part 1321 is greater than the radial width of the first conductive part 1311; the second conductive partition structure 1302 includes a second conductive part 1312 and a second partition part 1322. The second partition part 1322 is disposed on the second conductive part 1312, and the radial width of the second partition part 1322 is greater than the radial width of the second conductive part 1312.

[0058] Specifically, the conductive partition structure includes a first conductive partition structure 1301 and a second partition structure arranged vertically. The first conductive partition structure 1301 is insulated from the second conductive partition structure 1302; the difference is that their uses are different. The first conductive partition structure 1301 is used to connect the common transparent electrodes in two adjacent light-emitting units; the second conductive partition structure 1302 is used to connect the first bottom electrode 151 and the second top electrode 163.

[0059] Among them, the first conductive partition structure 1301 and the second conductive partition structure 1302 are insulated from each other, and the arrangement direction of the first conductive structure is perpendicular to the arrangement direction of the second conductive structure. That is, around an opening area, on one pair of sides, two first conductive partition structures 1301 are provided, and on the other pair of sides, two second conductive partition structures 1302 are provided. The second conductive partition structures 1302 are isolated from each other and not conductively connected to other conductive partition structures, but the first conductive partition structures 1301 are sequentially connected to the first conductive partition structures 1301 in other areas, so that the common transparent electrode is a whole electrode.

[0060] The first conductive partition structure 1301 is used to partition the first bottom electrode 151, the second light-emitting functional layer 152, the common transparent electrode shared by the first top electrode and the second bottom electrode, and the second light-emitting functional layer; the first conductive part 1311 is used to electrically connect the common transparent electrodes in two adjacent light-emitting units, and the second top electrode 163 and the conductive part are separated by the second light-emitting functional layer.

[0061] The second conductive portion 1312 is connected to the second top electrode 163, and the second conductive portion 1312 passes through the pixel defining layer and is connected to the first bottom electrode 151, so that within each of the light-emitting units, the first bottom electrode 151 is connected to the second top electrode 163. Among them, the light-emitting units in two adjacent opening regions respectively use different second conductive isolation structures 1302 to connect the first bottom electrode 151 and the second top electrode 163. That is, a second conductive isolation structure 1302 connected to the first bottom electrode 151 within the opening region is provided in each opening region, and the second conductive isolation structure 1302 is also connected to the second top electrode 163 within the opening region.

[0062] When evaporating the second top electrode 163, it is necessary to adjust the evaporation angle, especially at one end close to the second conductive isolation structure 1302 connected to the first bottom electrode 151, so that during the evaporation process of the second top electrode 163, it is connected to the second conductive portion 1312 of the second conductive isolation structure 1302, thereby connecting to the first bottom electrode 151.

[0063] When the second top electrode 163 is made of magnesium material and silver material, the light transmittance also needs to be considered additionally. The transmittance of a metal is related to its lattice structure, which refers to the way metal atoms are arranged according to specific rules. When the lattice structure of the metal is tight enough and there is not enough space for photons to pass through, the metal will exhibit the characteristic of being opaque. If the thickness of the metal is reduced to a certain extent, photons may pass through the lattice structure of the metal, making the metal translucent. In addition to the light transmittance, the work function also needs to be considered. When setting the thickness considering the light transmittance, the work function also needs to be taken into account, and its thickness also affects the work function. The light-transmitting metal oxide materials include indium tin oxide (ITO) or indium zinc oxide (IZO), and the work function of the light-transmitting metal oxide materials is generally higher than that of the metal materials. Therefore, the first bottom electrode 151, the light-transmitting common electrode 161, and the second top electrode 163 can all be formed by laminating a light-transmitting metal oxide and a metal material to meet different work function requirements, and can be specifically designed in actual situations.

[0064] Figure 7 is a schematic diagram of the light-emitting unit of the display panel according to the second embodiment of the present application. Refer to Figure 7 As shown, the present application discloses a display panel 100, which includes a substrate 110, a pixel defining layer 120, a plurality of light-emitting units 140, and a conductive isolation structure 130. Each of the light-emitting units 140 includes a first organic light-emitting unit 150 and a second organic light-emitting unit 160, and the first organic light-emitting unit 150 and the second organic light-emitting unit 160 are formed in parallel stacking.

[0065] The first organic light-emitting unit 150 is disposed on a side of the second organic light-emitting unit 160 close to the substrate 110; the first organic light-emitting unit 150 includes a first bottom electrode 151, a second light-emitting functional layer 152, and a first top electrode that are arranged gradually away from the substrate 110; the second organic light-emitting unit 160 includes a second bottom electrode, a second light-emitting functional layer 162, and a second top electrode 163 that are arranged gradually away from the substrate 110; the second bottom electrode and the first top electrode share a transparent common electrode 161, and the first organic light-emitting unit 150 and the second organic light-emitting unit 160 are connected in parallel through the transparent common electrode 161.

[0066] Specifically, when the display panel 100 is a bottom-emitting display panel 100, the first bottom electrode 151 is a transparent electrode, which is formed by using one or more of magnesium material, silver material, or transparent metal oxide, and the second top electrode 163 is a reflective electrode, which is formed by using one or two of magnesium material and silver material; wherein, the thickness of the first bottom electrode 151 is less than the thickness of the second top electrode 163.

[0067] In this embodiment, the first bottom electrode 151 is the light-emitting side, and through the reflection of the second top electrode 163, all light rays are emitted from the first bottom electrode 151. The bottom-emitting display panel 100 also has the advantage that the top electrode side does not need to emit light. The thickness of the top electrode can be very large and can be formed as a whole surface. All the light-emitting units 140 share the top electrode of the whole-surface reflective metal material. Compared with the top electrode formed by indium tin oxide in the top-emitting display panel 100, the resistance drop is lower, and the components at different positions are more uniform, avoiding different voltages at different positions. Moreover, since the emitted light rays of the light-emitting unit 140 do not need to pass through the subsequent encapsulation layer after the manufacturing process of the light-emitting unit 140 is completed, therefore, the selectivity of the materials and processes for the encapsulation layer is greater, and better encapsulation of the light-emitting unit 140 can be achieved.

[0068] Among them, the second light-emitting functional layer 152 includes a first hole transport layer 153, a first light-emitting layer 154, and a first electron transport layer 155; the first electron transport layer 155 is disposed on the first bottom electrode 151, the first light-emitting layer 154 is disposed on the first electron transport layer 155, and the first hole transport layer 153 is disposed on the first light-emitting layer 154; the second light-emitting functional layer 162 includes a second hole transport layer 166, a second light-emitting layer 165, and a second electron transport layer 164; the second hole transport layer 166 is disposed on the second bottom electrode, the second light-emitting layer 165 is disposed on the second hole transport layer 166, and the second electron transport layer 164 is disposed on the second light-emitting layer 165; the first bottom electrode 151 and the second top electrode 163 are cathodes, and the first top electrode and the second bottom electrode are anodes.

[0069] In this embodiment, the second light-emitting functional layer 152 of the first organic light-emitting unit 150 is arranged in an inverted manner, and the second light-emitting functional layer 162 of the second organic light-emitting unit 160 is arranged in a normal manner. The light-transmitting common electrode 161 corresponding to the first top electrode and the second bottom electrode is an anode, which provides holes for the first hole transport layer 153 and the second hole transport layer 166 respectively. In this embodiment, in addition to the above-mentioned conductive function and isolation function, the conductive isolation structure 130 is also used to isolate the first bottom electrode 151.

[0070] Specifically, the conductive isolation structure 130 is also used to isolate the first bottom electrodes 151 of two adjacent light-emitting units 140. Through the isolation effect of the conductive isolation structure 130, multiple independent and non-connected cathodes can be formed without etching the cathode, so that the cathodes of adjacent light-emitting units 140 are completely separated. Even if there is a redundant part of the first bottom electrode 151 formed on the isolation structure, the redundant part of the first bottom electrode 151 can also be disconnected from the first bottom electrode 151 to prevent the problem of current crosstalk. Moreover, most importantly, the process of the first bottom electrode 151 and the subsequent process of the second light-emitting functional layer 152 can be completed in the same vacuum environment, reducing the film layer problem between the bottom electrode and the light-emitting functional layer. In this embodiment, the cathode formed by the active metal material can reduce the work function of the cathode to improve the phenomenon that the hole injection and electron injection in the inverted organic light-emitting display panel 100 cannot be balanced, and solve the problem of low luminous efficiency of the current inverted organic light-emitting display panel 100.

[0071] When the first bottom electrode 151 is a cathode, the first bottom electrode 151 can be formed of one or both of a magnesium material and a silver material with a relatively thin thickness and light transmissibility. At this time, an auxiliary electrode 167 can be further provided below the first bottom electrode 151. The auxiliary electrode 167 can be formed of a light-transmissive metal oxide. In this embodiment, the function of the cathode auxiliary electrode 167 is mainly to be connected to the pixel active switch in the driving circuit layer through a via hole. It can be understood that a driving circuit layer is also provided on the substrate 110. The driving circuit layer generally includes a pixel driving circuit of the light-emitting unit 140, such as a pixel active switch (thin-film transistor), a data driving line, a scan control line, etc. The cathode of each light-emitting unit 140 is connected to the pixel active switch through the cathode auxiliary electrode 167, and the voltage of the cathode is controlled through the pixel active switch. The auxiliary electrode 167 can specifically be one or both of indium tin oxide material (ITO) and indium zinc oxide material (IZO), and the light transmittance of such materials is greater than 90% of the metal material. Adding the auxiliary electrode 167 can further improve the light-emitting efficiency of the inverted bottom-emitting display panel 100, and it is easier to achieve the work function matching between the cathode and the anode through the combination of the cathode and the auxiliary electrode 167.

[0072] Specifically, the thickness of the conductive part 131 in this embodiment is between 0.1 um and 1.5 um, and the thickness of the partition part 132 is between 0.03 um and 0.2 um. The greater the thickness of the conductive partition structure 130 in this embodiment, the stronger the partitioning ability. However, the second top electrode 163 generally only needs to be provided on the entire surface and does not need to be partitioned. Therefore, the thickness of the conductive part 131 needs to be less than or equal to 1.5 um, and the thickness of the partition part 132 is less than or equal to 0.2 um. However, considering that the smaller the thickness of the conductive partition structure 130, the thinner the film layer it partitions, so the thickness of the conductive part 131 is at least greater than or equal to 0.1 um, and the thickness of the partition part 132 is at least greater than or equal to 0.03 um.

[0073] The conductive partition structure is also used to partially partition the second light-emitting functional layer; the second light-emitting functional layer includes a second hole transport layer, a second light-emitting layer, and a second electron transport layer; wherein, when the second hole transport layer is disposed on the second light-emitting layer, the conductive partition structure is used to partition the second electron transport layer and the second light-emitting layer, and the second hole transport layer is not partitioned by the conductive partition structure, and the second hole transport layer separates the second top electrode from the conductive part; or when the second electron transport layer is disposed on the second light-emitting layer; the conductive partition structure is used to partition the second hole transport layer and the second light-emitting layer, and the second electron transport layer is not partitioned by the conductive partition structure, and the second electron transport layer separates the second top electrode from the conductive part.

[0074] In this embodiment, by setting the thicknesses of the conductive part and the partition part in the conductive partition structure, the second hole transport layer or the second electron transport layer in the second organic light-emitting unit is not completely blocked by the partition structure, so that during the formation of the second top electrode, the short circuit caused by the contact between the second top electrode and the light-transmitting common electrode can be avoided. In other words, the second top electrode and the conductive part are separated by the second light-emitting functional layer, specifically the film layer closer to the second top electrode in the second light-emitting functional layer.

[0075] Figure 8 is a schematic diagram of the steps of the manufacturing method of the display panel of the present application, Figure 9 is a schematic diagram of the manufacturing process of the display panel of the present application. Refer to Figures 8 to 9 As shown, the present application also discloses the manufacturing method of any one of the above display surfaces, including the steps:

[0076] S110: Provide a substrate;

[0077] S120: Form a pixel definition layer on the substrate, and form a plurality of opening areas on the pixel definition layer;

[0078] S130: Form a conductive partition structure on the pixel definition layer, and the conductive partition structure is located in the non-opening area;

[0079] S140: Utilize the conductive partition structure to sequentially deposit and form light-emitting units over the entire surface in the opening areas;

[0080] Wherein, each of the light-emitting units includes a first organic light-emitting unit and a second organic light-emitting unit, and the first organic light-emitting unit and the second organic light-emitting unit are formed in parallel stacking.

[0081] Before the step S120, there is also a step: forming a driving circuit layer on the substrate 110, and the driving circuit layer includes a plurality of thin-film transistors and driving lines, and the thin-film transistors and the driving lines form a driving circuit for driving a plurality of light-emitting units 140 to emit light. Wherein, during the formation of the driving circuit layer, vias are also provided for the thin-film transistors corresponding to driving the light-emitting units 140, and the vias are used to provide an auxiliary electrode 167 to be connected between the thin-film transistor and the first bottom electrode 151 of the first organic light-emitting unit 150.

[0082] In the step S120, there is also a step:

[0083] S121: Deposit an auxiliary electrode material on the substrate, and form an auxiliary electrode in the opening area after patterning;

[0084] S122: Deposit and pattern a pixel definition layer on the auxiliary electrode. The auxiliary electrodes of two adjacent light-emitting units are separated by the pixel definition layer, and a plurality of opening areas are formed, with the auxiliary electrodes exposed from the opening areas.

[0085] In this embodiment, after the above process of the driving circuit layer is completed, an auxiliary electrode 167 is formed in the opening area 101, and at the via position of the driving circuit layer, the auxiliary electrode 167 is connected to the output end of the thin-film transistor to achieve voltage control of the cathode. Of course, in the process of manufacturing the top-emission display panel 100, the auxiliary electrode 167 is the first bottom electrode 151, and in the subsequent steps of forming the light-emitting unit 140, the first bottom electrode 151 is no longer formed using the conductive isolation structure 130.

[0086] The steps in S130 include:

[0087] S131: Sequentially form a conductive part material layer and a partition part material layer on the pixel definition layer;

[0088] S132: Etch the partition part material layer to form a partition part;

[0089] S133: Use the partition part as a protective layer to etch the conductive part, so that the radial width of the partition part is greater than the radial width of the conductive part to form a conductive isolation structure;

[0090] The steps in S140 include: sequentially depositing a first bottom electrode, a second light-emitting functional layer, a light-transmitting common electrode, a second light-emitting functional layer, and a second top electrode over the entire surface; the first bottom electrode, the first light-emitting functional layer, the light-transmitting common electrode, and part of the second light-emitting functional layer in two adjacent opening areas are separated by the conductive isolation structure, and the second top electrode is not separated by the conductive isolation structure.

[0091] Specifically, deposit the material of the first bottom electrode 151 over the entire surface, and form the first bottom electrode 151 in a plurality of opening areas 101 through the conductive isolation structure 130. Deposit the material of the first hole transport layer 153 over the entire surface, and form the first hole transport layer 153 in the opening area 101. Before this, a hole injection layer 158 can be formed first, and an electron blocking layer 157 is formed after the first hole transport layer 153 is formed. Deposit the material of the first light-emitting layer 154 over the entire surface, and form the first light-emitting layer 154 in the opening area 101. Among them, before forming the first light-emitting layer 154, a prime layer can be deposited first, which is used to adjust the emission thickness of light-emitting layers of different colors and also has the effect of improving the emission performance and stability of the light-emitting layer. When forming light-emitting layers of different colors, metal mask evaporation is also required.

[0092] Evaporate the material of the first electron transport layer 155 over the entire surface to form the first electron transport layer 155 in the opening area 101. Before this, a hole blocking layer 159 can also be formed, and an electron injection layer 156 can be formed after the first electron transport layer 155 is formed.

[0093] Evaporate the material of the transparent common electrode 161 over the entire surface to form the transparent common electrode 161 in the opening area 101, and the transparent common electrode 161 is in electrical contact with the conductive portion 131.

[0094] Among them, the evaporation angle can be controlled so that the first hole transport layer 153, the first light-emitting layer 154, the first electron transport layer 155 are not in contact with the conductive portion 131, and when the transparent common electrode 161 is formed, the transparent common electrode 161 is connected to the conductive portion 131.

[0095] Repeat the above steps in sequence to form the second electron transport layer 164, the second light-emitting layer 165, the second hole transport layer 166, and the second top electrode 163 over the entire surface.

[0096] In the process of manufacturing the second organic light-emitting unit 160, the evaporation angle does not need to be controlled. When the second electron transport layer 164 is in contact with the conductive portion 131, the influence on the second organic light-emitting unit 160 is not significant.

[0097] Figure 10 It is a schematic diagram of the display device of the present application. Refer to Figure 10 As shown, the present application also discloses a display device. The display device 200 includes a driving circuit 210 and the above-mentioned display panel 100. Among them, the driving circuit 210 is used to drive the display panel 100 to display.

[0098] In the present application, the light-emitting unit 140 is formed by the conductive partition structure 130, and the light-emitting unit 140 is partitioned by the conductive partition structure 130. The light-emitting unit 140 is formed by stacking two organic light-emitting units 140. The present application adopts a parallel connection method, and the two organic light-emitting units 140 share the electrode on one side. Electrons or holes are provided for the first organic light-emitting unit 150 and the second organic light-emitting unit 160 on both sides through this common electrode, so that both the first organic light-emitting unit 150 and the second organic light-emitting unit 160 emit light, thereby improving the light-emitting brightness per unit area. When the present application uses the conductive partition structure 130 to form the stacked first organic light-emitting unit 150 and second organic light-emitting unit 160, especially when forming the light-emitting functional layers in the first organic light-emitting unit 150 and the second organic light-emitting unit 160, they can be formed in the same vacuum environment, and it is not necessary to etch each film layer, avoiding the problem of low light-emitting efficiency of the organic light-emitting unit 140 caused by etching.

[0099] It should be noted that the inventive concept of this application can form a very large number of embodiments. However, due to the limited space of the application documents, it is impossible to list them all. Therefore, on the premise of no conflict, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments. After the combination of each embodiment or technical feature, the original technical effect will be enhanced.

[0100] The above content is a further detailed description of this application in combination with specific optional implementation manners. It cannot be determined that the specific implementation of this application is only limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, without departing from the concept of this application, several simple deductions or substitutions can also be made, which should all be regarded as belonging to the protection scope of this application.

Claims

1. A display panel, comprising a substrate, a pixel definition layer, and a plurality of light-emitting units. The pixel definition layer is disposed on the substrate and is provided with a plurality of opening regions. The plurality of light-emitting units are disposed on the substrate and are respectively located in the opening regions. It is characterized in that the display panel further comprises a conductive partition structure, which is located in a non-opening region and is disposed on the pixel definition layer, and the conductive partition structure is used for partitioning two adjacent light-emitting units; each light-emitting unit comprises a first organic light-emitting unit and a second organic light-emitting unit, and the first organic light-emitting unit and the second organic light-emitting unit are formed by being stacked in parallel.

2. The display panel according to claim 1, wherein The first organic light-emitting unit is disposed on a side of the second organic light-emitting unit close to the substrate; The first organic light-emitting unit comprises a first bottom electrode, a first light-emitting functional layer, and a first top electrode that are arranged gradually away from the substrate; The second organic light-emitting unit comprises a second bottom electrode, a second light-emitting functional layer, and a second top electrode that are arranged gradually away from the substrate; The second bottom electrode and the first top electrode share a transparent common electrode, and the first organic light-emitting unit and the second organic light-emitting unit are connected in parallel through the transparent common electrode.

3. The display panel according to claim 2, wherein The first light-emitting functional layer comprises a first hole transport layer, a first light-emitting layer, and a first electron transport layer, and the second light-emitting functional layer comprises a second hole transport layer, a second light-emitting layer, and a second electron transport layer; The first hole transport layer is disposed on the first bottom electrode, the first light-emitting layer is disposed on the first hole transport layer, the first electron transport layer is disposed on the first light-emitting layer, the second electron transport layer is disposed on the second bottom electrode, the second light-emitting layer is disposed on the second electron transport layer, the second hole transport layer is disposed on the second light-emitting layer, the first bottom electrode and the second top electrode are anodes, and the first top electrode and the second bottom electrode are cathodes; or, The first electron transport layer is disposed on the first bottom electrode, the first light-emitting layer is disposed on the first electron transport layer, the first hole transport layer is disposed on the first light-emitting layer, the second hole transport layer is disposed on the second bottom electrode, the second light-emitting layer is disposed on the second hole transport layer, the second electron transport layer is disposed on the second light-emitting layer, the first bottom electrode and the second top electrode are cathodes, and the first top electrode and the second bottom electrode are anodes.

4. The display panel according to claim 2, characterized in that One of the first bottom electrode and the second top electrode is a reflective electrode, and the other is a transparent electrode; when the display panel is a bottom-emitting display panel, the first bottom electrode is a transparent electrode, which is formed by using one or more of magnesium material, silver material, or transparent metal oxide, and the second top electrode is a reflective electrode, which is formed by using one or two of magnesium material and silver material; wherein, the thickness of the first bottom electrode is less than the thickness of the second top electrode; When the display panel is a top-emitting display panel, the first bottom electrode is a reflective electrode, formed of one or both of magnesium material and silver material, and the second top electrode is a light-transmitting electrode, formed of one or more of magnesium material, silver material or light-transmitting metal oxide; wherein, the thickness of the first bottom electrode is greater than the thickness of the second top electrode; Within each of the light-emitting units, the first bottom electrode is connected to the second top electrode; The conductive partition structure includes a first conductive partition structure and a second partition structure arranged vertically, and the first conductive partition structure is insulated from the second conductive partition structure; The first conductive partition structure is used to connect the common light-transmitting electrodes in two adjacent light-emitting units; The second conductive partition structure is used to connect the first bottom electrode and the second top electrode.

5. The display panel according to claim 4, wherein The first conductive partition structure includes a first conductive portion and a first partition portion, the first partition portion is arranged on the first conductive portion, and the radial width of the first partition portion is greater than the radial width of the first conductive portion; The first conductive partition structure is used to partition the first bottom electrode, the first light-emitting functional layer, the first top electrode, the common light-transmitting electrode shared by the second bottom electrode, and the second light-emitting functional layer; The first conductive portion is used to electrically connect the common light-transmitting electrodes in two adjacent light-emitting units, and the second top electrode and the conductive portion are separated by the second light-emitting functional layer; The second conductive partition structure includes a second conductive portion and a second partition portion, the second partition portion is arranged on the second conductive portion, and the radial width of the second partition portion is greater than the radial width of the second conductive portion; The second conductive portion is connected to the second top electrode, and the second conductive portion passes through the pixel definition layer and is connected to the first bottom electrode.

6. The display panel according to claim 5, wherein The conductive partition structure is also used to partially partition the second light-emitting functional layer; The second light-emitting functional layer includes a second hole transport layer, a second light-emitting layer and a second electron transport layer; Wherein, when the second hole transport layer is arranged on the second light-emitting layer, the conductive partition structure is used to partition the second electron transport layer and the second light-emitting layer, the second hole transport layer is not partitioned by the conductive partition structure, and the second hole transport layer separates the second top electrode and the conductive portion; Or when the second electron transport layer is arranged on the second light-emitting layer; the conductive partition structure is used to partition the second hole transport layer and the second light-emitting layer, the second electron transport layer is not partitioned by the conductive partition structure, and the second electron transport layer separates the second top electrode and the conductive portion.

7. A method for manufacturing a display panel, characterized in that, Including the steps of: Providing a substrate; Forming a pixel definition layer on the substrate, and forming a plurality of opening areas on the pixel definition layer; Forming a conductive partition structure on the pixel definition layer, and the conductive partition structure is located in the non-opening area; Utilizing the conductive partition structure, sequentially depositing and forming light-emitting units integrally within the opening areas; Wherein, each of the light-emitting units includes a first organic light-emitting unit and a second organic light-emitting unit, and the first organic light-emitting unit and the second organic light-emitting unit are formed in parallel stacking.

8. The manufacturing method of the display panel according to claim 7, characterized in that The step of forming a conductive isolation structure on the pixel definition layer, where the conductive isolation structure is located in the non-opening area, includes: Sequentially forming a conductive part material layer and an isolation part material layer on the pixel definition layer; Etching the isolation part material layer to form an isolation part; Using the isolation part as a protective layer to etch the conductive part, so that the radial width of the isolation part is greater than the radial width of the conductive part to form a conductive isolation structure; The step of sequentially depositing a light-emitting unit over the entire surface in the opening area by using the conductive isolation structure includes: Sequentially depositing a first bottom electrode, a first light-emitting functional layer, a light-transmitting common electrode, a second light-emitting functional layer, and a second top electrode over the entire surface by evaporation; The first bottom electrode, the first light-emitting functional layer, the light-transmitting common electrode, and a part of the second light-emitting functional layer in two adjacent opening areas are isolated by the conductive isolation structure, and the second top electrode is not isolated by the conductive isolation structure.

9. The method for manufacturing a display panel according to claim 8, wherein The conductive isolation structure is further configured to partially isolate the second light-emitting functional layer; the second light-emitting functional layer includes a second hole transport layer, a second light-emitting layer, and a second electron transport layer; wherein, when the second hole transport layer is disposed on the second light-emitting layer, the conductive isolation structure is configured to isolate the second electron transport layer and the second light-emitting layer, the second hole transport layer is not isolated by the conductive isolation structure, and the second hole transport layer separates the second top electrode from the conductive part; or when the second electron transport layer is disposed on the second light-emitting layer; the conductive isolation structure is configured to isolate the second hole transport layer and the second light-emitting layer, the second electron transport layer is not isolated by the conductive isolation structure, and the second electron transport layer separates the second top electrode from the conductive part; The second top electrode and the conductive part are separated by the second light-emitting functional layer; The thickness of the conductive part in the conductive isolation structure is between 0.1 um and 1.5 um, and the thickness of the isolation part is between 0.03 um and 0.2 um.

10. A display device, characterized in that, A display panel including a driving circuit and any one of claims 1-6, wherein the driving circuit is configured to drive the display panel to display.

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