CN116940173A - Display panel, preparation method thereof and display device - Google Patents

Abstract

The application discloses a display panel, a preparation method thereof and a display device, which are used for avoiding short circuit between a first electrode and a second electrode of a light-emitting device. The display panel provided by the embodiment of the application comprises: a substrate base; a plurality of light emitting devices; the light emitting device includes: a first electrode, a light-emitting functional layer, and a second electrode; a pixel definition layer; the pixel definition layer comprises a plurality of first opening areas; the first electrode, the light-emitting functional layer and the second electrode are arranged in a lamination manner in the first opening area, and the light-emitting functional layer covers at least part of the area of the surface of the pixel defining layer, which is far away from one side of the substrate; and a partition structure located between the pixel definition layers corresponding to the adjacent two light emitting devices; the partition structure includes: two partition grooves sequentially arranged along the arrangement direction of two adjacent light emitting devices, and a partition part positioned between the two partition grooves; the partition groove has a first side surface adjacent to the partition portion, and the first side surface has a convex portion protruding toward the partition portion.

Description

Display panel, preparation method thereof and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device.

Background

Micro organic light emitting diode (Micro Organic Light Emitting Diode, micro OLED) displays are one of the OLED technologies, and relate to the combination of OLED technology and complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) technology, and are related to the cross integration of the optoelectronic industry and the microelectronic industry, which promotes the development of new generation Micro display technology, and also promotes the research and development of organic electrons on silicon, and even molecular electrons on silicon.

Micro OLED displays have excellent display characteristics such as high resolution, high brightness, rich colors, low driving voltage, fast response speed, low power consumption, etc., and have wide development prospects.

Disclosure of Invention

The embodiment of the application provides a display panel, a preparation method thereof and a display device, which are used for avoiding short circuit between a first electrode and a second electrode of a light emitting device.

The display panel provided by the embodiment of the application comprises: a substrate base;

a plurality of light emitting devices located at one side of the substrate; the light emitting device includes: a first electrode, a light-emitting functional layer, and a second electrode;

the pixel definition layer is positioned at one side of the first electrode, which is away from the substrate; the pixel definition layer comprises a plurality of first opening areas, and the orthographic projection of the first opening areas on the substrate falls into the orthographic projection of the first electrodes on the substrate; the first electrode, the light-emitting functional layer and the second electrode are arranged in a lamination manner in the first opening area, and the light-emitting functional layer covers at least part of the area of the surface of the pixel defining layer, which is far away from one side of the substrate;

And a partition structure located between the pixel definition layers corresponding to the adjacent two light emitting devices; the partition structure includes: two partition grooves sequentially arranged along the arrangement direction of two adjacent light emitting devices, and a partition part positioned between the two partition grooves;

the partition groove has a first side surface adjacent to the partition portion, and the first side surface has a convex portion protruding toward the partition portion.

In some embodiments, the isolation trench further has a second side adjacent to the pixel defining layer;

the second side face is a plane, and an included angle between the second side face and the bottom face of the partition groove is larger than or equal to 90 degrees.

In some embodiments, the partitions are disposed on the same layer as the pixel definition layer.

In some embodiments, the pixel definition layer includes: a first pixel defining sub-layer, a second pixel defining sub-layer and a third pixel defining sub-layer which are sequentially stacked in a direction perpendicular to the substrate;

the partition portion includes: a first sub-partition portion provided at the same level as the first pixel defining sub-layer, a second sub-partition portion provided at the same level as the second pixel defining sub-layer, and a third sub-partition portion provided at the same level as the third pixel defining sub-layer;

the depth of the partition groove is greater than the total thickness of the second sub-partition and the third sub-partition in a direction perpendicular to the substrate.

In some embodiments, in the arrangement direction of the partition grooves in the partition structure, the maximum width h1 of the first sub-partition, the minimum width h2 of the second sub-partition, and the maximum width h3 of the third sub-partition satisfy: h1> h2, h3> h2.

In some embodiments, the second sub-partition has a rectangular cross-section in a direction perpendicular to the substrate and parallel to the arrangement direction of the partition grooves in the partition structure.

In some embodiments, the second sub-partition has a trapezoid shape in cross section in a direction perpendicular to the direction of the substrate and parallel to the arrangement direction of the partition grooves in the partition structure;

the width of the second sub-partition portion in the arrangement direction of the partition grooves gradually decreases in a direction away from the substrate; alternatively, the width of the second sub-partition portion in the arrangement direction of the partition grooves gradually increases in a direction away from the base substrate.

In some embodiments, the first sub-partition and the third sub-partition are rectangular in cross-section in a direction perpendicular to the substrate and parallel to the arrangement direction of the partition grooves in the partition structure.

In some embodiments, h1=h3.

In some embodiments, in the arrangement direction of the partition grooves in the partition structure, the maximum width h4 of the partition and the minimum width h5 of the partition satisfy:

h5/(h4-h5)≥2。

In some embodiments, the partition has a first axis of symmetry perpendicular to the substrate, and the partition grooves on both sides of the partition are symmetrically disposed along the first axis of symmetry.

In some embodiments, the display panel further includes: a filling portion located at a side of the first pixel defining sub-layer facing the substrate and located between adjacent first electrodes;

the first electrode includes: the first surface and the second surface are oppositely arranged, and the second surface is positioned at one side of the first surface, which is away from the substrate; the surface of the filling part, which faces away from the substrate, and the second surface are positioned on the same plane.

In some embodiments, the first electrode further comprises: a third side connecting the first surface and the second surface; the pixel defining layer covers part of the second surface, and the filling part covers the third side surface;

the second surface is positioned on one side of the first surface, which is away from the substrate, and an included angle between the third side surface and the first surface is smaller than 90 degrees;

the orthographic projection of the partition part on the substrate falls into a region between the orthographic projections of the adjacent two first electrodes on the substrate;

the orthographic projection of the isolation groove on the substrate and the orthographic projection of the third side surface on the substrate are overlapped, and the orthographic projection of the isolation groove on the substrate and the orthographic projection of the second surface on the substrate are not overlapped.

In some embodiments, the width of the pixel defining layer is greater than or equal to 0.2 microns and less than or equal to 0.375 microns in the direction of alignment of adjacent two light emitting devices.

The preparation method of the display panel provided by the embodiment of the application comprises the following steps:

providing a substrate;

forming a plurality of light emitting devices, a pixel defining layer and a partition structure on one side of a substrate; wherein the light emitting device includes: a first electrode, a light-emitting functional layer, and a second electrode; the pixel definition layer comprises a plurality of first opening areas, and the orthographic projection of the first opening areas on the substrate falls into the orthographic projection of the first electrodes on the substrate; the first electrode, the light-emitting functional layer and the second electrode are arranged in a lamination manner in the first opening area, and the light-emitting functional layer covers at least part of the area of the surface of the pixel defining layer, which is far away from one side of the substrate; the partition structure is positioned between the pixel definition layers corresponding to the two adjacent light emitting devices; the partition structure includes: two partition grooves sequentially arranged along the arrangement direction of two adjacent light emitting devices, and a partition part positioned between the two partition grooves; the partition groove has a first side surface adjacent to the partition portion, and the first side surface has a convex portion protruding toward the partition portion.

In some embodiments, forming a plurality of light emitting devices, a pixel defining layer, and a blocking structure on one side of a substrate specifically includes:

forming a plurality of first electrodes on one side of a substrate;

forming a pixel definition layer on one side of the plurality of first electrodes, which is away from the substrate;

patterning the pixel definition layer to form a separation groove and a separation part;

forming a light-emitting functional layer on one side of the pixel definition layer, which is away from the substrate;

a second electrode is formed on one side of the light-emitting function layer substrate.

In some embodiments, the first electrode comprises: the first surface and the second surface are oppositely arranged, and the second surface is positioned at one side of the first surface, which is away from the substrate; before forming the pixel defining layer on the side of the plurality of first electrodes away from the substrate, the method further comprises:

forming a pattern of the filling portion; the surface of the filling part, which faces away from the substrate, and the second surface are positioned on the same plane.

The display device provided by the embodiment of the application comprises the display panel provided by the embodiment of the application.

According to the display panel, the manufacturing method thereof and the display device provided by the embodiment of the application, the first side surface of the partition groove adjacent to the partition part is provided with the convex part protruding towards the partition part, namely the partition part is provided with the concave area, so that the partition groove can be disconnected at the convex part when the whole surface of the luminous functional layer is evaporated, and the color cross problem among luminous devices can be avoided. In addition, the protruding part is arranged on the first side surface adjacent to the partition part, rather than the side surface adjacent to the pixel definition layer, namely, compared with the prior art, the disconnection position of the functional layer is farther away from the first electrode, so that even if the second electrode leaks in the area corresponding to the protruding part, the second electrode and the first electrode are not short-circuited due to the fact that the leakage path is far away from the first electrode.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a display panel according to the related art;

fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a first electrode according to an embodiment of the present application;

fig. 8 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present application;

fig. 9 is a flow chart of another method for manufacturing a display panel according to an embodiment of the application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. And embodiments of the application and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present application fall within the protection scope of the present application.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

It should be noted that the dimensions and shapes of the figures in the drawings do not reflect true proportions, and are intended to illustrate the present application only. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

In the related art, the Micro OLED panel has the following basic structure: first electrode + luminescence function layer + second electrode. The conventional OLED device is formed by evaporating different functional layers using a Fine Metal Mask (FMM) so as to form corresponding patterns in different pixel regions. However, FMM accuracy is limited and high image resolution cannot be achieved, so that Micro OLED technology adopts a process of evaporating a functional layer over the whole surface. However, the functional layer includes, for example, a carrier injection layer, a light emitting layer, a charge generation layer, and the like. The functional layer is usually a film layer of an organic material including a metal element, for example, a heavily doped material including a metal ion or a metal element, and generates a mobile charge under a voltage, thereby causing electric leakage between sub-pixels in a lateral direction and further causing a cross color problem. In order to avoid the cross color problem, as shown in fig. 1, a partition groove 302 needs to be provided between the sub-pixels to partition the functional layer. The related art barrier groove design as shown in fig. 1, a barrier groove 303 is formed on the pixel defining layer 5 covering the first electrode 201, and the side of the barrier groove 302 has a convex portion a facing the first electrode 201, so that the functional layer can be blocked. However, the convex portion a is very close to the first electrode, and there is a problem that the second electrode, the functional layer, and the anode are likely to leak, that is, the first electrode and the second electrode are short-circuited, at the portion where the functional layer is separated.

An embodiment of the present application provides a display panel, as shown in fig. 2, including: a substrate 1;

a plurality of light emitting devices 2 located on the side of the substrate 1;

the light emitting device 2 includes: a first electrode 201, a light-emitting functional layer 203, and a second electrode 202, which are stacked on the substrate 1 side;

a pixel defining layer 5 on a side of the first electrode 201 facing away from the substrate 1; the pixel defining layer 5 includes a plurality of first opening regions 505, and the front projection of the first opening regions 505 on the substrate 1 falls within the front projection of the first electrodes 201 on the substrate 1; the first electrode 201, the light-emitting functional layer 203, and the second electrode 202 are stacked in the first opening region 505, and the light-emitting functional layer 203 covers at least a partial region of the surface of the pixel defining layer 5 on the side away from the substrate 1;

and a plurality of partition structures 3 located between the pixel definition layers 5 corresponding to the adjacent two light emitting devices 2;

the partition structure 3 includes: two partition grooves 302 sequentially arranged in the arrangement direction of the adjacent two light emitting devices 2, and a partition portion 301 between the two partition grooves;

the partition groove 302 has a first side 3021 adjacent to the partition 301, and the first side 3021 has a convex portion B convex toward the partition 301.

According to the display panel provided by the embodiment of the application, the first side surface of the separation groove adjacent to the separation part is provided with the convex part protruding towards the separation part, namely the separation part is provided with the concave area, so that the separation part can be disconnected when the whole surface of the luminous functional layer is evaporated, and the problem of color cross between luminous devices can be avoided. In addition, the convex part is arranged on the first side surface adjacent to the partition part, rather than the side surface adjacent to the pixel definition layer, namely, compared with the prior art, the light-emitting functional layer is farther away from the first electrode at the disconnection position, so that even if the second electrode leaks in the area corresponding to the convex part, the second electrode and the first electrode are not short-circuited due to the fact that the leakage path is far away from the first electrode.

In some embodiments, as shown in fig. 2, the partition structure 3 has an overlap in a region between the orthographic projection of the substrate 1 and the orthographic projections of the adjacent two first electrodes 201 on the substrate 1; the partition structure 3 serves to disconnect the light emitting function layer 203 at a region between adjacent two of the first electrodes 201.

It should be noted that, the display panel includes a plurality of sub-pixels, and the plurality of sub-pixels are arranged in an array along a first direction and a second direction, and each sub-pixel includes a light emitting device.

It should be noted that, the partition structure has an overlap in a region between the orthographic projection of the substrate and the orthographic projection of the adjacent two first electrodes on the substrate, and if the two first electrodes are arranged along the first direction, the partition structure corresponding to the region between the two first electrodes includes two partition grooves arranged along the first direction, that is, the two partition grooves are respectively located at two sides of the partition portion in the first direction. If the two first electrodes are arranged along the second direction, the partition structure corresponding to the region between the two first electrodes includes two partition grooves arranged along the second direction, that is, the two partition grooves are respectively located at two sides of the partition portion in the second direction. The two light emitting devices 2 shown in fig. 2 are arranged in the first direction X, and the two partition grooves 302 are located on both sides of the partition 301 in the first direction X, respectively.

In some embodiments, as shown in fig. 2, the break groove 302 also has a second side 3022 adjacent to the pixel defining layer 5;

the second side 3022 is planar, and the angle between the second side 3022 and the bottom surface 3023 of the partition groove 302 is not smaller than 90 °. Therefore, the light-emitting functional layer cannot be disconnected on the second side surface, and the second electrode and the first electrode are prevented from being short-circuited due to the fact that the second side surface is closer to the first electrode than the first side surface.

In some embodiments, as shown in fig. 2, the second side 3022 is perpendicular to the bottom surface 3023 of the partition groove 302.

In some embodiments, as shown in fig. 2, the partition 301 is provided in the same layer as the pixel definition layer 5.

In other words, in the display panel provided by the embodiment of the application, the isolation grooves are formed in the pixel defining layer, and the pixel defining layer between adjacent isolation grooves is the isolation part.

In some embodiments, as shown in fig. 2, the first opening region 505 exposes a partial region of the first electrode 201. In a specific implementation, the first opening area is an opening area of the sub-pixel.

According to the display panel provided by the embodiment of the application, the partition part and the pixel definition layer are arranged on the same layer, so that the partition structure and the first opening area can be formed in the same patterning process, the process flow for manufacturing the partition structure can be saved, and the cost can be saved.

In some embodiments, as shown in fig. 2, in the arrangement direction of the partition grooves 302 in the partition structure 3 (the first direction X in fig. 2), the maximum width h4 of the partition 301 and the minimum width h5 of the partition 301 satisfy:

h5/(h4-h5)≥2。

since the first side surface has a concave region, which is a convex portion protruding toward the partition, the width of the partition in the arrangement direction of the partition grooves in the partition structure is reduced and then increased in the direction in which the substrate is directed to the light emitting device. In the direction perpendicular to the substrate, the minimum width of the partition is located in the middle area of the partition, so that the minimum width of the partition is too small to cause collapse of the partition, but if the minimum width of the partition is not greatly different from the maximum width of the partition, the partition effect of the light-emitting functional layer in the partition is affected.

The maximum width h4 of the partition part and the minimum width h5 of the partition part of the display panel provided by the embodiment of the application satisfy the following conditions: h5/(h 4-h 5) is not less than 2, thereby preventing collapse of the partition while ensuring the partition effect of the partition.

In the concrete implementation, h4 is more than or equal to 0.6 micrometer, and h5 is more than or equal to 0.1 micrometer.

In some embodiments, as shown in fig. 2, the pixel definition layer 5 includes: a first pixel defining sub-layer 501, a second pixel defining sub-layer 502, and a third pixel defining sub-layer 503, which are sequentially stacked in a direction perpendicular to the substrate 1;

the partition 301 includes: a first sub-partition 3011 provided in the same layer as the first pixel defining sub-layer 501, a second sub-partition 3012 provided in the same layer as the second pixel defining sub-layer 502, and a third sub-partition 3013 provided in the same layer as the third pixel defining sub-layer 503;

the depth of the partition groove 302 is greater than the total thickness of the second and third sub-partition 3012 and 3013 in the direction perpendicular to the base substrate 1.

In a specific implementation, the thickness of the first pixel defining sub-layer and the thickness of the third pixel defining sub-layer are smaller than the thickness of the second pixel defining sub-layer, that is, the thickness of the first sub-partition portion and the thickness of the third sub-partition portion are smaller than the thickness of the second sub-partition portion. The materials of the first pixel defining sub-layer, the first sub-partition, the third sub-partition, and the third pixel defining sub-layer include silicon oxide, and the materials of the second sub-partition and the second pixel defining sub-layer include silicon nitride.

In some embodiments, as shown in fig. 2, the depth h10 of the break groove 302 is equal to the total thickness of the first pixel defining sub-layer 501, the second pixel defining sub-layer 502, and the third pixel defining sub-layer 503. I.e. the depth h10 of the partition slot 302 is equal to the total thickness of the first, second and third sub-partition 3011, 3012, 3013.

In some embodiments, in the arrangement direction of the partition grooves in the partition structure, the maximum width h1 of the first sub-partition, the minimum width h2 of the second sub-partition, and the maximum width h3 of the third sub-partition satisfy: h1> h2, h3> h2.

According to the display panel provided by the embodiment of the application, the first sub-partition, the second sub-partition and the third sub-partition are arranged in a laminated manner, the minimum width h2 of the second sub-partition is smaller than the maximum width h1 of the first sub-partition, and the minimum width h2 of the second sub-partition is smaller than the maximum width h3 of the third sub-partition, so that the first side is provided with the protruding part facing the partition, and the light-emitting functional layer is disconnected at the partition.

In a specific implementation, the minimum width h5 of the partition 301=the minimum width h2 of the second sub-partition; if the maximum width h1 of the first sub-partition is greater than the maximum width h3 of the third sub-partition, the maximum width h4 of the partition 301 is equal to the maximum width h1 of the first sub-partition; if the maximum width h1 of the first sub-partition is smaller than the maximum width h3 of the third sub-partition, the maximum width h4 of the partition 301 is equal to the maximum width h3 of the third sub-partition; if the maximum width h1 of the first sub-partition is equal to the maximum width h3 of the third sub-partition, the maximum width h4 of the partition 301 is equal to the maximum width h1 of the first sub-partition and is equal to the maximum width h3 of the third sub-partition.

In some embodiments, h1=h3. I.e. h4=h1=h3.

In some embodiments, as shown in fig. 2, in a direction perpendicular to the substrate 1 and parallel to the arrangement direction of the partition structures 3 (first direction X in fig. 2), the cross section of the first sub-partition 3011 is rectangular, and the cross section of the third sub-partition 3013 is rectangular. That is, the widths of the first sub-partitions in the arrangement direction of the partition grooves in the partition structure are equal in the direction away from the substrate, and the maximum width h1 of the first sub-partitions is the width of the rectangular cross section of the first sub-partitions; in the direction away from the substrate, the widths of the third sub-partition parts in the arrangement direction of the partition grooves in the partition structure are equal, and the maximum width h3 of the third sub-partition parts is the width of the rectangular section of the third sub-partition parts.

In some embodiments, as shown in fig. 2, in a direction perpendicular to the substrate 1 and parallel to the arrangement direction of the partition structures 3 (first direction X in fig. 2), the cross section of the second sub-partition 3012 is rectangular in shape.

That is, the widths of the second sub-partitions in the arrangement direction of the partition grooves in the partition structure are equal in the direction away from the substrate, and the minimum width h2 of the second sub-partitions is the width of the rectangular cross section of the second sub-partitions.

In some embodiments, as shown in fig. 2, the width of the first sub-partition 3011 in the first direction X and the width of the third sub-partition 3013 in the first direction X are both greater than the width of the second sub-partition 3012 in the first direction X, and the width of the first sub-partition 3011 and the width of the third sub-partition 3013 in the first direction X are both greater than the width of the third sub-partition 3013 in the first direction X; the minimum width h5 of the partition 301 in the first direction X is the width of the second sub-partition 3012 in the first direction X, and the maximum width h1 of the partition 301 in the first direction X is equal to the width of the first sub-partition 3011 in the first direction X and the width of the third sub-partition 3013 in the first direction X.

Alternatively, in the specific implementation, the cross-section of the second sub-partition may have other shapes.

In some embodiments, as shown in fig. 3 and 4, in a direction perpendicular to the substrate 1 and parallel to the arrangement direction of the partition structures 3 (first direction X in fig. 3 and 4), the cross section of the second sub-partition 3012 is trapezoidal in shape.

In some embodiments, as shown in fig. 3, the width of the second sub-partition 3012 in the arrangement direction of the partition grooves 302 (first direction X in fig. 3) gradually decreases in the direction away from the base substrate 1.

In some embodiments, as shown in fig. 3, the width of the surface of the second sub-partition 3012 on the side away from the substrate base plate 1 in the arrangement direction of the partition grooves 302 (the first direction X in fig. 3) is the minimum width h2 of the second sub-partition 3012 in the arrangement direction of the partition grooves 302 (the first direction X in fig. 3), that is, the minimum width h5 of the partition 301; the width of the surface of the second sub-partition 3012 on the side close to the substrate 1 in the arrangement direction of the partition grooves 302 (first direction X in fig. 3) is the maximum width h11 of the second sub-partition 3012 in the arrangement direction of the partition grooves 302 (first direction X in fig. 3). In specific implementations, h2=h4 < h1=h3, h11+_h1=h3. In fig. 3, h11< h1=h3 is taken as an example, and h11=h1=h3 may be used in the implementation.

Alternatively, in some embodiments, as shown in fig. 4, the width of the second sub-partition 3012 in the arrangement direction of the partition grooves 302 (first direction X in fig. 4) gradually increases in the direction away from the base substrate 1.

In some embodiments, as shown in fig. 4, the width of the surface of the second sub-partition 3012 on the side close to the substrate 1 in the arrangement direction of the partition grooves 302 (the first direction X in fig. 4) is the minimum width h2 of the second sub-partition 3012 in the arrangement direction of the partition grooves 302 (the first direction X in fig. 4), that is, the minimum width h5 of the partition 301; the width of the surface of the second sub-partition 3012 on the side away from the substrate 1 in the arrangement direction of the partition grooves 302 (first direction X in fig. 4) is the maximum width h11 of the second sub-partition 3012 in the arrangement direction of the partition grooves 302 (first direction X in fig. 4). In specific implementations, h2=h4 < h1=h3, h11+_h1=h3. In fig. 4, h11< h1=h3 is taken as an example, and h11=h1=h3 may be used in the implementation.

In some embodiments, as shown in fig. 2 to 4, the partition 301 has a first symmetry axis 6 perpendicular to the substrate 1, and partition grooves 302 located at both sides of the partition 301 are symmetrically disposed along the first symmetry axis 6.

In some embodiments, as shown in fig. 2 to 4, the display panel further includes: a filling portion 14 located on the side of the first pixel defining sub-layer 501 facing the substrate 1 and located between adjacent first electrodes 201;

the first electrode 201 includes: a first surface 2011 and a second surface 2012 disposed opposite to each other, the second surface 2012 being located on a side of the first surface 2011 facing away from the substrate 1; the surface of the filling portion 14 facing away from the substrate base plate 1 is in the same plane as the second surface 2012.

In fig. 2 to 4, the second surface 2012 and the surface of the filling portion 14 facing away from the substrate 1 are both illustrated as a plane. In a specific implementation, when the first opening region is formed, a portion of the first electrode, that is, a surface of the first electrode at a portion exposed by the first opening region, may be removed, and the surface of the first electrode covered by the pixel defining layer is not in the same plane. In fig. 2 to 4, the thickness of the isolation trench 302 is equal to the total thickness of the first pixel defining sub-layer 501, the second pixel defining sub-layer 502, and the third pixel defining sub-layer 503. In the implementation, the thickness of the isolation groove may be greater than the total thickness of the first pixel defining sub-layer, the second pixel defining sub-layer and the third pixel defining sub-layer, that is, the isolation groove may further remove a part of the filling portion, that is, the surface of the filling portion at the isolation groove and the surface of the filling portion in the rest area are located in different planes. In the embodiment of the present application, the surface of the filling portion facing away from the substrate and the second surface are located on the same plane means that: the surface of the filling part furthest from the substrate is positioned on the same plane with the second surface of the first electrode furthest from the substrate.

According to the display panel provided by the embodiment of the application, the filling part is formed in the area between the adjacent first electrodes, and then the first pixel defining sub-layer, the second pixel defining sub-layer and the third pixel defining sub-layer are sequentially formed on one side of the filling part, which is away from the substrate, so that compared with the case that the first pixel defining sub-layer, the second pixel defining sub-layer and the third pixel defining sub-layer are directly formed, the total thickness of the formed first pixel defining sub-layer, second pixel defining sub-layer and third pixel defining sub-layer can be reduced, and the cost and the thickness of the display panel are reduced.

In some embodiments, the material of the filling portion is the same as the material of the first pixel defining sub-layer.

In some embodiments, as shown in fig. 2-4, the first electrode 201 further comprises: a third side 2013 connecting the first surface 2011 and the second surface 2012; the pixel defining layer 5 covers part of the second surface 2012 and the filling portion 14 covers the third side 2013;

the second surface 2012 is located on a side of the first surface 2011 facing away from the substrate 1, and an included angle between the third side 2013 and the first surface 2011 is smaller than 90 °;

the orthographic projection of the partition 301 on the substrate 1 falls into a region between the orthographic projections of the adjacent two first electrodes 201 on the substrate 1;

The orthographic projection of the isolation groove 302 on the substrate 1 and the orthographic projection of the third side 2013 on the substrate 1 are overlapped, and the orthographic projection of the isolation groove 302 on the substrate 1 and the orthographic projection of the second surface 2012 on the substrate 1 are not overlapped.

In some embodiments, as shown in fig. 2, the width h8 of the pixel defining layer 5 is greater than or equal to 0.2 micrometers and less than or equal to 0.375 micrometers in the arrangement direction of the adjacent two light emitting devices 3.

It should be noted that, in the related art, the partition groove 302 has a convex portion a on a side surface near the first electrode 201, that is, the pixel defining layer 5 has a concave portion therein, in order to avoid lateral leakage of the light emitting functional layer at the disconnection, it is generally necessary to make the convex portion a be far from the opening area of the pixel defining layer 5, as shown in fig. 1, h6 needs to be set to 0.25 micrometers or more and 0.35 micrometers or less, and h7 needs to be set to 0.3 micrometers or more and 0.4 micrometers or less. Compared with the related art, the display panel provided by the embodiment of the application has the advantages that the distance between the second side surface and the first opening area is reduced compared with the prior art because the cut-off part of the light-emitting functional layer is far away from the first opening area of the pixel definition layer, namely, the distance between the second side surface and the first opening area can be set to be h8< h6+h7, and the setting of the distance between the second side surface and the first opening area can be set to be h8 less than or equal to (h6+h7)/2, so that the size of the first opening area, namely, the opening ratio of the sub-pixel, is improved, the brightness of the display panel is improved, and the power consumption of the display panel is reduced.

In some embodiments, as shown in FIG. 2, the minimum width h8 of the partition slots 302 is greater than or equal to 0.2 microns.

In particular embodiments, the display panel provided by embodiments of the present disclosure may be a Micro organic light emitting diode (Micro OLED) display panel. Micro OLED display panels typically have dimensions of less than 100 microns, such as dimensions of less than 50 microns, etc. The driving circuit layer of the Micro OLED display panel adopts an integrated circuit comprising complementary metal oxide semiconductor transistors, and the pixel driving circuit is small in size, so that the resolution of the display panel can be improved; a resolution of greater than 3000 pixel density (PPI) of the Micro OLED display panel may be achieved. That is, the display panel provided by the embodiments of the present disclosure is a high-resolution display panel.

In a specific implementation, the substrate of the Micro OLED display panel is, for example, a silicon-based substrate; as shown in fig. 2, the display panel further includes: a driving circuit layer 10 located between the substrate base 1 and the light emitting device 2. Wherein the material of the planarization layer comprises silicon oxide, for example; the driving circuit layer is, for example, an integrated circuit, and comprises pixel driving circuits electrically connected with the light emitting devices in a one-to-one correspondence; the pixel driving circuit may include, for example, a complementary metal oxide semiconductor transistor.

In some embodiments, the light emitting device is a white light emitting device.

It should be noted that, because the resolution of the Micro OLED display panel is high, the resolution of the conventional Fine Metal Mask (FMM) can be about 800PPI at most, and it is difficult to perform evaporation of the organic light emitting layer by using the FMM in a Side by Side single color device (SBS) manner. Therefore, when the light emitting device is a white light emitting device, the whole surface evaporation process can be adopted to realize high resolution display.

In some embodiments, as shown in fig. 5, the light emitting functional layer 202 constitutes one light emitting unit 4, i.e. the light emitting device 2 comprises only one light emitting unit 4. That is, the light emitting device adopts a structure of a single organic light emitting layer to realize white light emission. The light-emitting functional layer includes, for example, an electron-transporting layer, an organic light-emitting layer, a hole-transporting layer, and the like.

Alternatively, in some embodiments, as shown in fig. 6, the light emitting functional layer 202 includes a plurality of light emitting cells 4 arranged in a stacked manner in a direction perpendicular to the substrate 1, and the charge generation layer 7 located between the light emitting cells 4.

Note that fig. 6 shows only the respective film layers of the light emitting device 2 in the first opening region.

In the case where the light emitting device includes only one light emitting unit, white light is realized by using a single organic light emitting layer, and the light emitting luminance of the light emitting device is not high in general, if a display panel including the light emitting device is used to realize high-luminance display, it is necessary to increase the power consumption of the display panel, and the life of the display panel is affected.

The display panel provided by the embodiment of the disclosure, the light emitting device comprises a plurality of light emitting units, each light emitting unit comprises an organic light emitting layer, so that light emitted by the light emitting device is an effect of overlapping the light emitting units, the brightness of the light emitting device can be improved, the power consumption of the display panel can be reduced, and the service life of the display panel can be prolonged.

In fig. 6, the light emitting device 2 is illustrated as an example including two light emitting units arranged in a stacked manner. In some embodiments, as shown in fig. 6, the light emitting device 2 includes: the first light-emitting unit 4-1 and the second light-emitting unit 4-2 positioned on the side of the first light-emitting unit 4-1 away from the substrate 1;

the first light emitting unit 4-1 includes: a red organic light emitting layer r ' and a green organic light emitting layer g ' positioned at a side of the red organic light emitting layer r ' facing away from the substrate 1;

the second light emitting unit 4-2 includes: blue organic light emitting layer b'.

In an embodiment, the charge generating layer is configured to generate electrons and holes, thereby providing electrons to the first light emitting unit and holes to the second light emitting unit.

In some embodiments, as shown in fig. 6, the first light emitting unit 4-1 further includes: a hole injection layer 2021 between the red organic light emitting layer r ' and the first electrode 201, a hole transport layer 2022 between the red organic light emitting layer r ' and the hole injection layer 2021, and an electron transport layer 2023 between the green organic light emitting layer g ' and the charge generation layer 7; the second light emitting unit 4-2 further includes: a hole injection layer 2021 located between the blue organic light emitting layer b 'and the charge generating layer 7, two hole transport layers 2022 located between the blue organic light emitting layer b' and the hole injection layer 2021, an electron transport layer 2023 located between the blue organic light emitting layer b 'and the second electrode 203, a hole blocking layer 2024 located between the blue organic light emitting layer b' and the electron transport layer 2023, and an electron injection layer 2025 located between the electron transport layer 2023 and the second electrode 203.

In some embodiments, as shown in fig. 5 and 6, the display panel further includes: and an encapsulation layer 11 at a side of the light emitting device 2 facing away from the substrate 1.

In a specific implementation, the encapsulation layer includes, for example, an inorganic encapsulation layer/an organic encapsulation layer/an inorganic encapsulation layer arranged in a stack.

In some embodiments, as shown in fig. 5 and 6, the light emitting device 2 is a white light emitting device; the display panel further includes: a color film 8 on the side of the light emitting device 2 facing away from the substrate, and a light shielding layer 9 (not shown in fig. 6) between adjacent color films 8.

In a specific implementation, the light shielding layer is provided with a second opening area, and the color film is positioned in the second opening area.

The display panel also comprises a color film, so that light emitted by the white light emitting device can emit light with the same color as the sub-pixels after passing through the color film, thereby realizing full-color display.

In a specific implementation, the plurality of sub-pixels includes, for example: a plurality of blue sub-pixels, a plurality of red sub-pixels, and a plurality of green sub-pixels. Correspondingly, the color film comprises: a blue color film corresponding to the blue sub-pixel, a red color film corresponding to the red sub-pixel, and a green color film corresponding to the green sub-pixel.

In some embodiments, as shown in fig. 5 and 6, the first electrode 201 includes: a reflecting portion 2011, and a cover 2012 located on a side of the reflecting portion 2011 facing away from the substrate 1; as shown in fig. 5, the cover 2012 covers the front surface and the side surface of the reflecting portion 2011 facing away from the substrate 1.

In some embodiments, as shown in fig. 5 and 6, the reflecting portion 2011 includes: a first sub-layer 20111, a reflective sub-layer 20112, and a second sub-layer 20113 are stacked. The first sub-layer 20111 and the second sub-layer 20113 are both used for protecting the reflective sub-layer 20112.

In specific implementation, as shown in fig. 7, the reflecting portion 2011 may further include: a fourth sub-layer 20114 located on a side of the first sub-layer 20111 facing the substrate 1. So as to further improve the protection effect of the reflecting sub-layer.

In a specific implementation, as shown in fig. 7, a planarization layer 12 is further included between the driving circuit layer (not shown) and the first electrode 201; the planarization layer 12 has a third surface 1201, a fourth surface 1202, and a fourth side surface 1203, the third surface 1201 and the fourth surface 1202 are both surfaces of the planarization layer 12 on a side away from the substrate 1, the fourth surface 1202 is covered by the covering portion 2012, and the third surface 1201 is covered by the reflecting portion 2011; fourth side 1203 connects third surface 1201 and fourth surface 1202; the distance from the fourth surface 1202 to the substrate 1 is smaller than the distance from the third surface 1201 to the substrate 1, and the cover 2012 covers the fourth side 1203 in addition to the fourth surface 1202. Further improving the protection effect of the covering part on the reflecting part and avoiding the corrosion of the reflecting sub-layer.

In some embodiments, the second electrode is a transparent electrode. For example, the material of the second electrode includes Indium Tin Oxide (ITO).

In some embodiments, the first sub-layer, the second sub-layer, and the third sub-layer each comprise a refractory metal material. For example, the first, second, third sub-layers comprise one or a combination of the following materials: titanium (Ti), tungsten (w), molybdenum (Mo), cobalt (Co), chromium (Cr), platinum (Pt), titanium nitride (TiN), titanium Tungsten (TiW), ITO.

In some embodiments, the material of the reflective sub-layer comprises: aluminum (Al).

It should be noted that, in the display panel provided by the embodiment of the disclosure, the first electrode includes the reflective portion in addition to the cover portion for providing the hole, and the second electrode is a transparent electrode, that is, the light emitting device is a top emission light emitting device. The light emitted from the light-emitting functional layer reaches the reflecting portion and is reflected and then emitted from the second electrode.

In a specific implementation, the first electrode is, for example, an anode of a light emitting device, and the second electrode is, for example, a cathode of the light emitting device.

Based on the same inventive concept, the embodiment of the present application further provides a method for manufacturing a display panel, as shown in fig. 8, including:

s101, providing a substrate base plate;

S102, forming a plurality of light emitting devices, a pixel definition layer and a partition structure on one side of a substrate; wherein the light emitting device includes: a first electrode, a light-emitting functional layer, and a second electrode; the pixel definition layer comprises a plurality of first opening areas, and the orthographic projection of the first opening areas on the substrate falls into the orthographic projection of the first electrodes on the substrate; the first electrode, the light-emitting functional layer and the second electrode are arranged in a lamination manner in the first opening area, and the light-emitting functional layer covers at least part of the area of the surface of the pixel defining layer, which is far away from one side of the substrate; the partition structure is positioned between the pixel definition layers corresponding to the two adjacent light emitting devices; the partition structure includes: two partition grooves sequentially arranged along the arrangement direction of two adjacent light emitting devices, and a partition part positioned between the two partition grooves; the partition groove has a first side surface adjacent to the partition portion, and the first side surface has a convex portion protruding toward the partition portion.

According to the manufacturing method of the display panel, the first side surface of the separation groove adjacent to the separation part is provided with the convex part protruding towards the separation part, namely, the separation part is provided with the concave area, so that the separation part can be disconnected when the whole surface of the luminous functional layer is evaporated, and the problem of color cross between luminous devices can be avoided. In addition, the convex part is arranged on the first side surface adjacent to the partition part, rather than the side surface adjacent to the pixel definition layer, namely, compared with the prior art, the light-emitting functional layer is farther away from the first electrode at the disconnection position, so that even if the second electrode leaks in the area corresponding to the convex part, the second electrode and the first electrode are not short-circuited due to the fact that the leakage path is far away from the first electrode.

In some embodiments, the partition groove further has a second side surface remote from the partition portion, the second side surface being planar, and an angle between the second side surface and a bottom surface of the partition groove being not less than 90 °.

In some embodiments, forming a plurality of light emitting devices, a pixel defining layer, and a blocking structure on one side of a substrate specifically includes:

forming a plurality of first electrodes on one side of a substrate;

forming a pixel definition layer on one side of the plurality of first electrodes, which is away from the substrate;

patterning the pixel definition layer to form a separation groove and a separation part;

forming a light-emitting functional layer on one side of the pixel definition layer, which is away from the substrate;

and forming a second electrode on one side of the light-emitting functional layer, which is away from the substrate.

In some embodiments, the first electrode comprises: the first surface and the second surface are oppositely arranged, and the second surface is positioned at one side of the first surface, which is away from the substrate; before forming the pixel defining layer on the side of the plurality of first electrodes away from the substrate, the method further comprises:

forming a pattern of the filling portion; the surface of the filling part, which faces away from the substrate, and the second surface are positioned on the same plane.

In some embodiments, before forming the plurality of first electrodes on one side of the substrate base plate, further comprising:

A driving circuit layer and a planarization layer are formed on one side of a substrate.

The structure of the driving circuit layer is referred to an embodiment of the display panel of the present application, and will not be described herein.

In some embodiments, forming a plurality of first electrodes on one side of the substrate base plate specifically includes:

sequentially forming a first sub-layer, a reflecting sub-layer and a second sub-layer on one side of the planarization layer, which is away from the substrate, and performing patterning on the first sub-layer, the reflecting sub-layer and the second sub-layer to form reflecting parts of a plurality of first electrodes;

and forming a cover part film layer on one side of the second sub-layer, which is away from the substrate, and patterning the cover part film layer to form a pattern of the cover part.

Alternatively, in some embodiments, forming a plurality of first electrodes on one side of the substrate includes:

forming a third sub-layer, a first sub-layer, a reflecting sub-layer and a second sub-layer in sequence on one side of the planarization layer, which is away from the substrate, and performing patterning on the third sub-layer, the first sub-layer, the reflecting sub-layer and the second sub-layer to form reflecting parts of a plurality of first electrodes;

and forming a cover part film layer on one side of the second sub-layer, which is away from the substrate, and patterning the cover part film layer to form a pattern of the cover part.

In a specific implementation, the patterning process performed on the third sub-layer, the first sub-layer, the reflective sub-layer, the second sub-layer, and the covering part film layer includes steps such as gluing, exposure, development, etching, and the like.

In some embodiments, forming a pattern of the filling portion on a side of the plurality of first electrodes facing away from the substrate, forming a pixel defining layer, and performing a patterning process on the pixel defining layer to form a isolation groove and an isolation portion, as shown in fig. 9, specifically includes:

s201, forming a film layer of the filling part 14;

s202, patterning the film layer of the filling part 14 to form a pattern of the filling part 14;

s203, forming a first pixel defining sub-layer 501, a second pixel defining sub-layer 502, and a third pixel defining sub-layer 503 in sequence on the filling portion 14 and the side of the first electrode 201 facing away from the substrate 1; patterning the first pixel defining sub-layer 501, the second pixel defining sub-layer 502 and the third pixel defining sub-layer 503 to form patterns of a first opening area 505 and a third opening area 506;

s204, coating the photoresist layer 13 and performing an exposure and development process on the photoresist layer 13 to form a fourth opening region 1301; the orthographic projection of the fourth opening region 1301 on the substrate 1 covers a partial region of the orthographic projection of the third opening region 506 on the substrate 1 and covers a region between the adjacent third opening regions 506 on the substrate 1;

S205, performing a dry etching process on the second pixel definition sub-layer 502 positioned between the adjacent third opening areas 506, and forming a partition 301 and a partition groove 302 on the pixel definition layer 5; the first side 3021 of the partition groove 302 adjacent to the partition 301 has a convex portion B facing the partition 301;

s206, removing the photoresist layer 13.

In a specific implementation, patterning the filling part film layer includes steps such as gluing, exposing, developing, etching and the like. For example, the first pixel defining sub-layer, the second pixel defining sub-layer, and the third pixel defining sub-layer may be formed by a plasma vapor deposition process, and a patterning process for forming the patterns of the first opening region and the third opening region may include, for example, steps of gluing, exposing, developing, etching, and the like.

In fig. 9, the cross-sectional shape of the second pixel defining sub-layer formed by dry etching is rectangular, and in a specific implementation, the cross-sectional shape of the second pixel defining sub-layer may be other shapes such as trapezoid.

In some embodiments, after forming the second electrode on a side of the light emitting functional layer facing away from the substrate, the method further includes:

forming a packaging layer on one side of the second electrode, which is away from the substrate;

And forming a shading layer and a pattern of the color film on one side of the packaging layer, which is separated from the substrate.

The display device provided by the embodiment of the application comprises the display panel provided by the embodiment of the application.

The display device provided by the embodiment of the application comprises the following components: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device will be understood by those skilled in the art, and are not described herein in detail, nor should they be considered as limiting the application. The implementation of the display device can be referred to the embodiment of the display panel, and the repetition is not repeated.

In summary, in the display panel, the manufacturing method thereof and the display device provided by the embodiments of the present application, the first side surface of the isolation groove adjacent to the isolation portion has the convex portion protruding toward the isolation portion, that is, the isolation portion has the concave region, so that the isolation portion can be disconnected when the entire light-emitting functional layer is evaporated, and the cross color problem between the light-emitting devices can be avoided. In addition, the convex part is arranged on the first side surface adjacent to the partition part, rather than the side surface adjacent to the pixel definition layer, namely, compared with the prior art, the light-emitting functional layer is farther away from the first electrode at the disconnection position, so that even if the second electrode leaks in the area corresponding to the convex part, the second electrode and the first electrode are not short-circuited due to the fact that the leakage path is far away from the first electrode.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (18)

1. A display panel, the display panel comprising: a substrate base;

a plurality of light emitting devices located at one side of the substrate base plate; the light emitting device includes: a first electrode, a light-emitting functional layer, and a second electrode;

a pixel defining layer located at one side of the first electrode away from the substrate base plate; the pixel definition layer comprises a plurality of first opening areas, and the orthographic projection of the first opening areas on the substrate falls into the orthographic projection of the first electrodes on the substrate; the first electrode, the light-emitting functional layer and the second electrode are arranged in a lamination manner in the first opening area, and the light-emitting functional layer covers at least part of the area of the surface of the pixel defining layer, which is far away from one side of the substrate;

And a partition structure located between the pixel definition layers corresponding to the adjacent two light emitting devices; the partition structure includes: two partition grooves sequentially arranged along the arrangement direction of two adjacent light emitting devices, and a partition part positioned between the two partition grooves;

the partition groove has a first side adjacent to the partition portion, the first side having a convex portion protruding toward the partition portion.

2. The display panel of claim 1, wherein the break groove further has a second side adjacent to the pixel defining layer;

the second side face is a plane, and an included angle between the second side face and the bottom of the partition groove is larger than or equal to 90 degrees.

3. A display panel according to claim 1 or 2, wherein the partition is arranged in the same layer as the pixel defining layer.

4. A display panel according to claim 3, wherein the pixel definition layer comprises: a first pixel defining sub-layer, a second pixel defining sub-layer and a third pixel defining sub-layer which are sequentially stacked in a direction perpendicular to the substrate;

the partition portion includes: a first sub-partition portion provided at the same level as the first pixel defining sub-layer, a second sub-partition portion provided at the same level as the second pixel defining sub-layer, and a third sub-partition portion provided at the same level as the third pixel defining sub-layer;

The depth of the partition groove is greater than the total thickness of the second sub-partition and the third sub-partition in a direction perpendicular to the substrate.

5. The display panel according to claim 4, wherein in an arrangement direction of the partition grooves in the partition structure, a maximum width h1 of the first sub-partition portion, a minimum width h2 of the second sub-partition portion, and a maximum width h3 of the third sub-partition portion satisfy: h1> h2, h3> h2.

6. The display panel according to claim 5, wherein a cross section of the second sub-partition is rectangular in shape in a direction perpendicular to the substrate base plate and parallel to an arrangement direction of the partition grooves in the partition structure.

7. The display panel according to claim 5, wherein a cross section of the second sub-partition is trapezoidal in shape in a direction perpendicular to the substrate base plate and parallel to an arrangement direction of the partition grooves in the partition structure;

the width of the second sub-partition portion in the arrangement direction of the partition grooves gradually decreases in a direction away from the substrate base plate; alternatively, the width of the second sub-partition portion in the arrangement direction of the partition grooves is gradually increased in a direction away from the base substrate.

8. The display panel according to claim 5, wherein the first sub-partition portion and the third sub-partition portion are rectangular in cross section in a direction perpendicular to the substrate and parallel to an arrangement direction of the partition grooves in the partition structure.

9. The display panel according to any one of claims 5 to 8, wherein h1=h3.

10. The display panel according to any one of claims 4 to 8, wherein a maximum width h4 of the partition portion and a minimum width h5 of the partition portion in an arrangement direction of the partition grooves in the partition structure satisfy:

h5/(h4-h5)≥2。

11. the display panel according to any one of claims 4 to 8, wherein the partition portion has a first symmetry axis perpendicular to the substrate, and the partition grooves on both sides of the partition portion are symmetrically arranged along the first symmetry axis.

12. The display panel according to any one of claims 4 to 8, further comprising: a filling portion located at a side of the first pixel defining sub-layer facing the substrate and located between adjacent first electrodes;

the first electrode includes: the first surface and the second surface are oppositely arranged, and the second surface is positioned on one side of the first surface, which is away from the substrate; the surface of the filling part, which is away from the substrate, and the second surface are positioned on the same plane.

13. The display panel of claim 12, wherein the first electrode further comprises: a third side connecting the first surface and the second surface; the pixel defining layer covers part of the second surface, and the filling part covers the third side surface;

the second surface is positioned on one side of the first surface, which is away from the substrate, and an included angle between the third side surface and the first surface is smaller than 90 degrees;

the orthographic projection of the partition part on the substrate falls into a region between the orthographic projections of two adjacent first electrodes on the substrate;

the orthographic projection of the partition groove on the substrate and the orthographic projection of the third side surface on the substrate are overlapped, and the orthographic projection of the partition groove on the substrate and the orthographic projection of the second surface on the substrate are not overlapped.

14. The display panel according to claim 12, wherein a width of the pixel defining layer is greater than or equal to 0.2 micrometers and less than or equal to 0.375 micrometers in an arrangement direction of adjacent two of the light emitting devices.

15. A method for manufacturing a display panel, the method comprising:

Providing a substrate;

forming a plurality of light emitting devices, a pixel defining layer and a partition structure on one side of the substrate; wherein the light emitting device includes: a first electrode, a light-emitting functional layer, and a second electrode; the pixel definition layer comprises a plurality of first opening areas, and the orthographic projection of the first opening areas on the substrate falls into the orthographic projection of the first electrodes on the substrate; the first electrode, the light-emitting functional layer and the second electrode are arranged in a lamination manner in the first opening area, and the light-emitting functional layer covers at least part of the area of the surface of the pixel defining layer, which is far away from one side of the substrate; the partition structure is positioned between the pixel definition layers corresponding to the two adjacent light emitting devices; the partition structure includes: two partition grooves sequentially arranged along the arrangement direction of two adjacent light emitting devices, and a partition part positioned between the two partition grooves; the partition groove has a first side adjacent to the partition portion, the first side having a convex portion protruding toward the partition portion.

16. The method of claim 15, wherein forming a plurality of light emitting devices, pixel defining layers, and barrier structures on one side of the substrate comprises:

Forming a plurality of first electrodes on one side of the substrate;

forming a pixel definition layer on one side of the plurality of first electrodes away from the substrate;

patterning the pixel definition layer to form the isolation groove and the isolation part;

forming the light-emitting functional layer on one side of the pixel definition layer, which is away from the substrate;

and forming a second electrode on one side of the light-emitting functional layer, which is away from the substrate.

17. The method of claim 16, wherein the first electrode comprises: the first surface and the second surface are oppositely arranged, and the second surface is positioned on one side of the first surface, which is away from the substrate; before forming the pixel defining layer on the side of the plurality of first electrodes away from the substrate, the pixel defining layer further comprises:

forming a pattern of the filling portion; the surface of the filling part, which is away from the substrate, and the second surface are positioned on the same plane.

18. A display device characterized in that the display device comprises a display panel according to any one of claims 1 to 14.