Display substrate and display device

Abstract

A display substrate, comprising a substrate, and an organic isolation structure and a plurality of light-emitting elements arranged on the substrate. The organic isolation structure comprises a plurality of first organic isolation pillars, wherein at least one first organic isolation pillar is located in a gap between light-emitting areas of at least two adjacent light-emitting elements that emit light of different colors. Each first organic isolation pillar comprises a first isolation layer and a second isolation layer which are stacked. The first isolation layer comprises a first bottom surface and a first top surface, the second isolation layer comprises a second bottom surface and a second top surface, and the second bottom surface is in contact with the first top surface. The orthographic projection of the first bottom surface on the substrate comprises the orthographic projection of the first top surface on the substrate, the orthographic projection of the first top surface on the substrate covers the orthographic projection of the second bottom surface on the substrate, and the orthographic projection of the second bottom surface on the substrate comprises the orthographic projection of the second top surface on the substrate.

Description

Display substrate and display device

[0001] This application claims priority to the Chinese patent application filed on January 30, 2024, with application number 202410132178.5 and invention name “Display Substrate and Display Device”, the contents of which should be understood as incorporated into this application by reference. Technical Field

[0002] This article relates to but is not limited to the field of display technology, and in particular to a display substrate and a display device. Background Art

[0003] Organic Light Emitting Diodes (OLEDs) are active light-emitting display devices with advantages such as self-luminescence, wide viewing angles, high contrast, low power consumption, and extremely fast response times. With the continuous advancement of display technology, display devices using OLEDs as light-emitting devices and thin-film transistors (TFTs) for signal control have become mainstream products in the display field. Summary of the Invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] Embodiments of the present application provide a display substrate and a display device.

[0006] In one aspect, this embodiment provides a display substrate comprising: a substrate, an organic isolation structure disposed on the substrate, and a plurality of light-emitting elements. The organic isolation structure comprises: a plurality of first organic spacer pillars, at least one of which is located between the light-emitting regions of at least two adjacent light-emitting elements emitting light of different colors. The at least one first organic spacer pillar comprises: a stacked first isolation layer and a second isolation layer, the second isolation layer being located on a side of the first isolation layer away from the substrate, the orthographic projection of the first isolation layer on the substrate overlapping the orthographic projection of the second isolation layer on the substrate. The first isolation layer comprises: a first bottom surface and a first top surface, the first bottom surface being located on a side of the first top surface closer to the substrate; the second isolation layer comprises: a second bottom surface and a second top surface, the second bottom surface being located on a side of the second top surface closer to the substrate, and the second bottom surface contacting the first top surface. The orthographic projection of the first bottom surface on the substrate includes the orthographic projection of the first top surface on the substrate, the orthographic projection of the first top surface on the substrate overlaps the orthographic projection of the second bottom surface on the substrate, and the orthographic projection of the second bottom surface on the substrate includes the orthographic projection of the second top surface on the substrate.

[0007] In some exemplary embodiments, the light-emitting element includes: a light-emitting functional layer, the light-emitting functional layer including at least: two light-emitting layers, and at least one charge generation layer located between the two light-emitting layers; the light-emitting functional layer is located on the side of the organic isolation structure away from the substrate, and the orthographic projection of the light-emitting functional layer on the substrate at least partially overlaps with the orthographic projection of the organic isolation structure on the substrate.

[0008] In some exemplary embodiments, an orthographic projection of the at least one charge generation layer on the substrate covers an orthographic projection of the plurality of light emitting elements on the substrate.

[0009] In some exemplary embodiments, the at least one charge generation layer includes: a first portion located in the light emitting region of the light emitting element, and a second portion overlapping the organic isolation structure; the thickness of the first portion is greater than that of the second portion.

[0010] In some exemplary embodiments, the light-emitting functional layer includes: a first hole transport layer, a first light-emitting layer, a first hole blocking layer, a first charge generating layer, a second charge generating layer, a second hole transport layer, a second light-emitting layer, a second hole blocking layer and an electron transport layer stacked in sequence.

[0011] In some exemplary embodiments, the first isolation layer and the second isolation layer of the at least one first organic spacer are an integral structure connected to each other.

[0012] In some exemplary embodiments, the thickness of the first isolation layer is in a range of 0.2 micrometers to 1.1 micrometers, and the thickness of the second isolation layer is in a range of 1.2 micrometers to 1.6 micrometers.

[0013] In some exemplary embodiments, at least two adjacent first organic spacers extending in the same direction are disposed between the light emitting regions of at least two adjacent light emitting elements emitting light of different colors.

[0014] In some exemplary embodiments, the organic isolation structure further includes at least one second organic spacer pillar, the second organic spacer pillar being located between two adjacent first organic spacers extending in the same direction. The second organic spacer pillar includes a third bottom surface and a third top surface, the third bottom surface being located on a side of the third top surface closer to the substrate; and an orthographic projection of the third top surface on the substrate including an orthographic projection of the third bottom surface on the substrate.

[0015] In some exemplary embodiments, a thickness of the second organic spacer is less than or equal to a thickness of the first organic spacer.

[0016] In some exemplary embodiments, a material of the second organic spacer is different from a material of the first organic spacer.

[0017] In some exemplary embodiments, the light-emitting element includes: a stacked first electrode, a light-emitting functional layer, and a second electrode, the first electrode being located on a side of the second electrode closer to the substrate. The display substrate further includes: a pixel definition layer located on a side of the first electrode of the light-emitting element farther from the substrate, the pixel definition layer being provided with a pixel opening, the light-emitting functional layer being in contact with the first electrode through the pixel opening; the organic isolation structure being located on a side of the pixel definition layer farther from the substrate; the orthographic projection of the pixel definition layer on the substrate overlapping the orthographic projection of the organic isolation structure on the substrate.

[0018] In some exemplary embodiments, the light-emitting element includes: a stacked first electrode, a light-emitting functional layer, and a second electrode, wherein the first electrode is located on a side of the second electrode closer to the substrate. The display substrate further includes: a pixel definition layer located on a side of the first electrode of the light-emitting element farther from the substrate, the pixel definition layer being provided with a pixel opening, and the light-emitting functional layer being in contact with the first electrode through the pixel opening. The orthographic projection of the pixel definition layer on the substrate does not overlap with the orthographic projection of the organic isolation structure on the substrate, or the orthographic projection of the pixel definition layer on the substrate partially overlaps with the orthographic projection of the organic isolation structure on the substrate.

[0019] In some exemplary embodiments, the pixel definition layer is provided with at least one first isolation groove, and the at least one first organic isolation column of the organic isolation structure is provided in the at least one first isolation groove; the orthographic projection of the first isolation groove on the substrate does not overlap with the orthographic projection of the first electrode of the light-emitting element on the substrate.

[0020] In some exemplary embodiments, the display substrate further includes: a plurality of support columns, at least one of the plurality of support columns being located between light-emitting regions of two adjacent light-emitting elements that emit light of the same color; and a maximum height of the first organic isolation column being less than or equal to a minimum height of the support column.

[0021] In some exemplary embodiments, the plurality of light-emitting elements include: a plurality of first light-emitting elements emitting a first color of light, a plurality of second light-emitting elements emitting a second color of light, and a plurality of third light-emitting elements emitting a third color of light; the plurality of first light-emitting elements and the plurality of second light-emitting elements are arranged in a row along a first direction, and the plurality of third light-emitting elements are arranged in a row along the first direction, wherein a row of first and second light-emitting elements and a row of third light-emitting elements are arranged in a second direction, and the first direction intersects the second direction. The organic isolation structure includes: a plurality of first organic spacer columns extending along the first direction and a plurality of first organic spacer columns extending along the second direction; at least one first organic spacer column extending along the second direction is provided between adjacent first and second light-emitting elements; and at least one first organic spacer column extending along the first direction is provided between adjacent third light-emitting elements and the first and second light-emitting elements.

[0022] On the other hand, this embodiment provides a display device including the display substrate as described above.

[0023] On the other hand, this embodiment provides a method for preparing a display substrate, comprising: providing a substrate; forming an organic isolation structure and a plurality of light-emitting elements on the substrate. The organic isolation structure comprises: a plurality of first organic spacer columns, at least one of the plurality of first organic spacer columns being located between light-emitting regions of at least two adjacent light-emitting elements emitting light of different colors; the at least one first organic spacer column comprising: a stacked first isolation layer and a second isolation layer, the second isolation layer being located on a side of the first isolation layer away from the substrate, the orthographic projection of the first isolation layer on the substrate covering the orthographic projection of the second isolation layer on the substrate; the first isolation layer comprising: a first bottom surface and a first top surface, the first bottom surface being located on a side of the first top surface close to the substrate; the second isolation layer comprising: a second bottom surface and a second top surface, the second bottom surface being located on a side of the second top surface close to the substrate, and the second bottom surface contacting the first top surface; the orthographic projection of the first bottom surface on the substrate including the orthographic projection of the first top surface on the substrate, the orthographic projection of the first top surface on the substrate covering the orthographic projection of the second bottom surface on the substrate, and the orthographic projection of the second bottom surface on the substrate including the orthographic projection of the second top surface on the substrate.

[0024] In some exemplary embodiments, forming the organic isolation structure on the substrate includes: forming the first organic spacer using a half-tone mask, wherein the first isolation layer and the second isolation layer of the first organic spacer are an interconnected integral structure.

[0025] In some exemplary embodiments, forming the organic isolation structure on the substrate includes: forming a first isolation layer of the first organic spacer using a first mask, and forming a second isolation layer of the first organic spacer using a second mask.

[0026] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. Other advantages of the present application can be realized and obtained by the solutions described in the description and the drawings.

[0027] Summary of the Figures

[0028] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0029] FIG1 is a schematic diagram of a display substrate according to at least one embodiment of the present disclosure;

[0030] FIG2 is a partial enlarged schematic diagram of area A1 in FIG1 ;

[0031] FIG3 is a partial enlarged schematic diagram of area A2 in FIG2 ;

[0032] FIG4 is a schematic plan view of the anode layer in FIG3 ;

[0033] FIG5 is a schematic partial cross-sectional view along the Q1-Q1' direction in FIG3;

[0034] FIG6A is a partial enlarged schematic diagram of area A3 in FIG5 ;

[0035] FIG6B is a partial enlarged schematic diagram of area A4 in FIG5 ;

[0036] FIG7 is a schematic diagram of preparing an organic isolation structure according to at least one embodiment of the present disclosure;

[0037] FIG8 is another schematic diagram of preparing an organic isolation structure according to at least one embodiment of the present disclosure;

[0038] FIG9 is another partial cross-sectional schematic diagram along the Q1-Q1' direction in FIG3;

[0039] FIG10 is another schematic diagram of preparing an organic isolation structure according to at least one embodiment of the present disclosure;

[0040] FIG11 is another partial cross-sectional schematic diagram along the Q1-Q1' direction in FIG3;

[0041] FIG12 is another partially enlarged schematic diagram of area A1 in FIG1 ;

[0042] FIG13 is a partial enlarged schematic diagram of area A5 in FIG12 ;

[0043] FIG14 is a schematic partial cross-sectional view along the Q2-Q2' direction in FIG13;

[0044] FIG15 is another partial cross-sectional schematic diagram along the Q2-Q2' direction in FIG13;

[0045] FIG16 is another partially enlarged schematic diagram of area A1 in FIG1 ;

[0046] FIG17 is a partial enlarged schematic diagram of area A6 in FIG16 ;

[0047] FIG18 is a schematic partial cross-sectional view along the Q3-Q3' direction in FIG17;

[0048] FIG19 is another partially enlarged schematic diagram of area A1 in FIG1 ;

[0049] FIG20 is another partially enlarged schematic diagram of area A1 in FIG1 ;

[0050] FIG21 is another partially enlarged schematic diagram of area A1 in FIG1 ;

[0051] FIG22 is another partially enlarged schematic diagram of area A1 in FIG1 ;

[0052] FIG23 is another partially enlarged schematic diagram of area A1 in FIG1 ;

[0053] FIG24 is another partially enlarged schematic diagram of area A1 in FIG1 ;

[0054] FIG. 25 is a schematic diagram of a display device according to at least one embodiment of the present disclosure.

[0055] Details

[0056] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments can be implemented in a variety of different forms. A person skilled in the art can easily understand that the method and content can be transformed into one or more forms without departing from the purpose and scope of the present application. Therefore, the present application should not be interpreted as being limited to the contents described in the following embodiments. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other in any way.

[0057] In the drawings, the size of one or more components, layer thicknesses, or regions may be exaggerated for clarity. Therefore, one embodiment of the present application is not necessarily limited to these dimensions, and the shapes and sizes of various components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate idealized examples, and one embodiment of the present application is not limited to the shapes or values ​​shown in the drawings.

[0058] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, a feature defined as "first," "second," etc., may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means at least two, such as two, three, etc., unless expressly limited otherwise.

[0060] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, "connected" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the meanings of the above terms in this application can be understood according to the circumstances.

[0061] In this application, "electrically connected" includes components connected together via an element having some electrical function. There are no particular limitations on the "element having some electrical function" as long as it enables the transmission of electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other components with one or more functions.

[0062] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", or "some examples" means that the features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0064] In this application, a transistor refers to an element that includes at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain electrode) and a source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. In this disclosure, the channel region refers to the region through which current primarily flows.

[0065] In this application, the first electrode may be a drain electrode and the second electrode may be a source electrode, or the first electrode may be a source electrode and the second electrode may be a drain electrode. The functions of the "source electrode" and "drain electrode" may be interchanged when using transistors with opposite polarities or when the direction of current changes during circuit operation. Therefore, in this disclosure, the terms "source electrode" and "drain electrode" may be interchanged.

[0066] In this application, "parallel" refers to a state where the angle formed by two straight lines is greater than -10° and less than 10°, and thus includes a state where the angle is greater than -5° and less than 5°. Furthermore, "perpendicular" refers to a state where the angle formed by two straight lines is greater than 80° and less than 100°, and thus includes a state where the angle is greater than 85° and less than 95°.

[0067] The terms “approximately” and “substantially” in this application refer to values ​​that are not strictly limited and allow for process and measurement errors.

[0068] In this specification, "A extends along direction B" means that A may include a main portion and a secondary portion connected to the main portion, the main portion being a line, line segment, or strip, extending along direction B, and the length of the main portion extending along direction B being greater than the length of the secondary portion extending along other directions. Throughout this specification, "A extends along direction B" means "the main portion of A extends along direction B."

[0069] As used herein, "A and B are in the same layer" or "A and B are disposed in the same layer" means that A and B are formed simultaneously through the same patterning process, or that the surfaces of A and B near the substrate are substantially the same distance from the substrate, or that the surfaces of A and B near the substrate are in direct contact with the same film layer. "Same layer" does not always mean that the thickness or height of the layer is the same in a cross-sectional view.

[0070] In this application, the "thickness" and "height" of a film layer refer to the dimensions of the film layer in a direction perpendicular to the display substrate. The "thickness" of a film layer refers to the vertical distance between the surface of the film layer facing away from the substrate and the surface of the film layer facing closer to the substrate. The "height" of a film layer refers to the vertical distance between the surface of the film layer facing away from the substrate and the substrate surface.

[0071] In this application, “the orthographic projection of A contains the orthographic projection of B” means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or the boundary of the orthographic projection of A coincides with the boundary of the orthographic projection of B. “The orthographic projection of A covers the orthographic projection of B” means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A.

[0072] The OLED light-emitting element includes: an anode (Anode), a light-emitting functional layer and a cathode (Cathode) stacked in sequence. Driven by the voltage of the anode and the cathode, the light-emitting characteristics of the organic material of the light-emitting functional layer are used to emit light according to the required grayscale. In order to reduce the process difficulty and improve the yield, some film layers in the light-emitting functional layer of the OLED light-emitting element will adopt a common layer design as the entire film layer. After research, the inventors found that when a film layer with a higher conductivity in the light-emitting functional layer is used as a common layer, it is easy to generate crosstalk between adjacent light-emitting elements. For example, a common layer with a higher conductivity (for example, a hole injection layer, etc.) can guide the leakage current of the light-emitting element that needs to emit light to the adjacent light-emitting element that does not need to emit light, causing the adjacent light-emitting element that does not need to emit light to be slightly bright, resulting in poor crosstalk. Moreover, at low grayscale, the brightness deviation caused by the crosstalk current will be more obvious, resulting in the inability to accurately display the required color, seriously affecting the color accuracy of the display product at low grayscale. For example, since the driving voltage of the blue light-emitting element is relatively large, the blue light-emitting element easily causes the red light-emitting element and the green light-emitting element to light up in a low grayscale monochrome display situation, thereby causing color mixing.

[0073] The present embodiment provides a display substrate and a display device, which can improve display defects caused by crosstalk between adjacent light-emitting elements, thereby improving display effects.

[0074] This embodiment provides a display substrate, comprising: a substrate; an organic isolation structure disposed on the substrate; and a plurality of light-emitting elements. The organic isolation structure comprises a plurality of first organic spacer pillars, at least one of which is located between the light-emitting regions of at least two adjacent light-emitting elements emitting light of different colors. The at least one first organic spacer pillar comprises a stacked first isolation layer and a second isolation layer, the second isolation layer being located on the side of the first isolation layer away from the substrate, the orthographic projection of the first isolation layer on the substrate overlapping the orthographic projection of the second isolation layer on the substrate. The first isolation layer comprises a first bottom surface and a first top surface, the first bottom surface being located on the side of the first top surface closer to the substrate; the second isolation layer comprises a second bottom surface and a second top surface, the second bottom surface being located on the side of the second top surface closer to the substrate, and the second bottom surface contacting the first top surface. The orthographic projection of the first bottom surface on the substrate includes the orthographic projection of the first top surface on the substrate, the orthographic projection of the first top surface on the substrate overlaps the orthographic projection of the second bottom surface on the substrate, and the orthographic projection of the second bottom surface on the substrate includes the orthographic projection of the second top surface on the substrate.

[0075] In some examples, the size of the first top surface of the first isolation layer may be smaller than or equal to the size of the first bottom surface. When the size of the first top surface of the first isolation layer is smaller than the size of the first bottom surface, the orthographic projection of the first bottom surface on the substrate may cover the orthographic projection of the first top surface on the substrate. For example, in a plane perpendicular to the extension direction of the first organic isolation column and perpendicular to the substrate, the cross-sectional shape of the first isolation layer may be approximately trapezoidal, such as an isosceles trapezoid. When the size of the first top surface of the first isolation layer is equal to the size of the first bottom surface, the orthographic projection of the first bottom surface on the substrate may coincide with the orthographic projection of the first top surface on the substrate. For example, in a plane perpendicular to the extension direction of the first organic isolation column and perpendicular to the substrate, the cross-sectional shape of the first isolation layer may be approximately rectangular.

[0076] In some examples, the size of the second top surface of the second isolation layer may be smaller than or equal to the size of the second bottom surface. When the size of the second top surface of the second isolation layer is smaller than the size of the second bottom surface, the orthographic projection of the second bottom surface on the substrate may cover the orthographic projection of the second top surface on the substrate. For example, in a plane perpendicular to the extension direction of the first organic isolation column and perpendicular to the substrate, the cross-sectional shape of the second isolation layer may be approximately trapezoidal, such as an isosceles trapezoid. When the size of the second top surface of the second isolation layer is equal to the size of the second bottom surface, the orthographic projection of the second bottom surface on the substrate may coincide with the orthographic projection of the second top surface on the substrate. For example, in a plane perpendicular to the extension direction of the first organic isolation column and perpendicular to the substrate, the cross-sectional shape of the second isolation layer may be approximately rectangular.

[0077] In some examples, the size of the first top surface of the first isolation layer can be larger than the size of the second bottom surface of the second isolation layer, and the orthographic projection of the first top surface on the substrate can cover the orthographic projection of the second bottom surface on the substrate. The first isolation layer and the second isolation layer can be stacked to form a stepped stacking structure. For example, in a plane perpendicular to the extension direction of the first organic isolation column and perpendicular to the substrate, the cross-sectional shape of the first organic isolation column can be a stacked shape of a smaller trapezoid stacked on a larger trapezoid; or the cross-sectional shape of the first organic isolation column can be a stacked shape of a smaller rectangle stacked on a larger rectangle; or the cross-sectional shape of the first organic isolation column can be a stacked shape of a smaller trapezoid stacked on a larger rectangle; or the cross-sectional shape of the first organic isolation column can be a stacked shape of a smaller trapezoid stacked on a larger rectangle; or the cross-sectional shape of the first organic isolation column can be a stacked shape of a smaller rectangle stacked on a larger trapezoid. This embodiment is not limited to this.

[0078] The display substrate provided in this embodiment adopts a design of a first organic isolation column including two isolation layers, which can extend the leakage current path between adjacent light-emitting elements emitting light of different colors, thereby improving the display defects caused by crosstalk between adjacent light-emitting elements emitting light of different colors and improving the display effect.

[0079] In some exemplary embodiments, a light-emitting element may include a light-emitting functional layer, the light-emitting functional layer including at least two light-emitting layers and at least one charge generation layer located between the two light-emitting layers. The light-emitting functional layer is located on the side of the organic isolation structure away from the substrate, and the orthographic projection of the light-emitting functional layer on the substrate at least partially overlaps with the orthographic projection of the organic isolation structure on the substrate. For example, the orthographic projection of the light-emitting functional layer on the substrate may cover the orthographic projection of the organic isolation structure on the substrate, or the orthographic projection of the light-emitting functional layer on the substrate may partially overlap with the orthographic projection of the organic isolation structure on the substrate. In some examples, the light-emitting functional layer may include: a first hole transport layer, a first light-emitting layer, a first hole blocking layer, a first charge generation layer, a second charge generation layer, a second hole transport layer, a second light-emitting layer, a second hole blocking layer, and an electron transport layer stacked in sequence. In this example, the light-emitting element may adopt a tandem structure design, using the charge generation layer as a heterogeneous layer and connecting the two light-emitting layers in series. This can greatly reduce the light-emitting current of the light-emitting element at the same light-emitting intensity, thereby improving the power consumption and life of the display product and meeting the brightness requirements of the user.

[0080] In some exemplary embodiments, the orthographic projection of the at least one charge generation layer on the substrate overlaps the orthographic projections of multiple light-emitting elements on the substrate. Because the charge generation layer has a high conductivity and the charge generation layers of adjacent light-emitting elements are continuous layers, crosstalk between adjacent light-emitting elements can easily occur. In this example, by providing a first organic spacer between adjacent light-emitting elements that emit light of different colors, with the light-emitting functional layer positioned on the first organic spacer, the leakage current path between adjacent light-emitting elements can be extended, thereby reducing leakage current between adjacent light-emitting elements that emit light of different colors and improving display defects caused by crosstalk.

[0081] In some exemplary embodiments, at least one charge generation layer may include a first portion located in the light-emitting region of the light-emitting element and a second portion overlapping the organic isolation structure. The first portion may be thicker than the second portion. In this example, utilizing the organic isolation structure can reduce the thickness of the second portion of the charge generation layer, increasing its resistance. This reduces leakage current between adjacent light-emitting elements emitting different colors, thereby improving display defects caused by crosstalk.

[0082] In some exemplary embodiments, the first isolation layer and the second isolation layer of at least one first organic spacer can be interconnected and integrally formed. In some examples, the first isolation layer and the second isolation layer of the first organic spacer can be formed using a single patterning process, simplifying the manufacturing steps. However, this embodiment is not limited to this. In other examples, the first isolation layer and the second isolation layer of the first organic spacer can be formed using two patterning processes.

[0083] In some exemplary embodiments, the thickness of the first isolation layer may range from 0.2 micrometers to 1.1 micrometers, and the thickness of the second isolation layer may range from 1.2 micrometers to 1.6 micrometers.

[0084] In some exemplary embodiments, at least two adjacent first organic spacers extending in the same direction may be provided between the light-emitting regions of at least two adjacent light-emitting elements emitting light of different colors. In this example, by providing at least two first organic spacers between adjacent light-emitting elements emitting light of different colors, the leakage current path between adjacent light-emitting elements can be further extended, further improving display defects caused by crosstalk between adjacent light-emitting elements emitting light of different colors, thereby enhancing the display quality.

[0085] In some exemplary embodiments, the organic isolation structure may further include at least one second organic spacer column. The second organic spacer column may be located between two adjacent first organic spacers extending in the same direction. The second organic spacer column may include a third bottom surface and a third top surface. The third bottom surface may be located on the side of the third top surface closer to the substrate. The orthographic projection of the third top surface on the substrate may include the orthographic projection of the third bottom surface on the substrate. In some examples, the size of the third bottom surface of the second organic spacer column may be smaller than or equal to the size of the third top surface. When the size of the third bottom surface of the second organic spacer column is smaller than the size of the third top surface, the orthographic projection of the third top surface on the substrate may overlap the orthographic projection of the third bottom surface on the substrate. In this way, the second organic spacer column may form an inverted trapezoidal cross-section in a plane perpendicular to the extension direction of the second organic spacer column and perpendicular to the substrate. This makes it easier for the light-emitting functional layer to be cut off at the bottom corner of the second organic spacer column during deposition, forming an "undercut" structure. This further reduces lateral leakage current between adjacent light-emitting elements emitting light of different colors, thereby reducing crosstalk between adjacent light-emitting elements emitting light of different colors. In some other examples, the size of the third bottom surface of the second organic spacer may be equal to the size of the third top surface, and the orthographic projections of the third bottom surface and the third top surface on the substrate may coincide with each other.

[0086] In some exemplary embodiments, the light-emitting element may include: a stacked first electrode, a light-emitting functional layer, and a second electrode, and the first electrode may be located on a side of the second electrode close to the substrate. For example, the first electrode may be an anode, and the second electrode may be a cathode. The display substrate may further include: a pixel definition layer located on a side of the first electrode of the light-emitting element away from the substrate, the pixel definition layer may be provided with a pixel opening, and the light-emitting functional layer may be in contact with the first electrode through the pixel opening. The organic isolation structure may be located on a side of the pixel definition layer away from the substrate. In some examples, the orthographic projection of the pixel definition layer on the substrate may cover the orthographic projection of the organic isolation structure on the substrate. In this example, the organic isolation structure may be provided on the pixel definition layer.

[0087] In some exemplary embodiments, the orthographic projection of the pixel definition layer on the substrate may not overlap with the orthographic projection of the organic isolation structure on the substrate, or the orthographic projection of the pixel definition layer on the substrate may partially overlap with the orthographic projection of the organic isolation structure on the substrate. In this example, the height of the organic isolation structure can be reduced by removing or thinning the pixel definition layer below the organic isolation structure, thereby avoiding scratches between the fine metal mask (FMM) and the organic isolation structure. Moreover, the leakage current path between adjacent light-emitting elements emitting light of different colors can be further increased, thereby improving the crosstalk between adjacent light-emitting elements emitting light of different colors.

[0088] In some exemplary embodiments, the display substrate may further include: a plurality of support columns, at least one of the plurality of support columns may be located between the light-emitting areas of two adjacent light-emitting elements that emit light of the same color. The maximum height of the first organic isolation column may be less than or equal to the minimum height of the support column. In some examples, the material of the support column may be different from the material of the first organic isolation column. For example, the material of the support column may be the same as the material of the pixel definition layer and different from the material of the first organic isolation column. The support column of this example is configured to support the FMM. By setting the height of the first organic isolation column to be lower than the height of the support column, it is possible to avoid scratches between the FMM and the first organic isolation column, thereby avoiding poor dark spot display caused by this.

[0089] The solution of this embodiment is illustrated below through some examples.

[0090] Figure 1 is a schematic diagram of a display substrate of at least one embodiment of the present disclosure. In some examples, as shown in Figure 1, the display substrate of this embodiment may include: a display area AA and a border area BB located around the display area AA. The border area BB may surround the display area AA, for example, including an upper border, a lower border, a left border, and a right border. The display area AA may be provided with at least a plurality of pixel units, and each pixel unit may include a plurality of sub-pixels, such as three or four sub-pixels. At least one sub-pixel may include: a light-emitting element and a pixel circuit that drives the light-emitting element to emit light. In some examples, the size of the display substrate may be a micro display size, a small or medium size, or a large size. This example does not limit the size and resolution of the display substrate.

[0091] Figure 2 is a partially enlarged schematic diagram of area A1 in Figure 1. Figure 3 is a partially enlarged schematic diagram of area A2 in Figure 2. Figure 4 is a planar schematic diagram of the anode layer in Figure 3. In some examples, as shown in Figures 2 and 3, on a plane parallel to the display substrate, the multiple sub-pixels in display area AA may include: a plurality of first sub-pixels P1 emitting a first color light, a plurality of second sub-pixels P2 emitting a second color light, and a plurality of third sub-pixels P3 emitting a third color light. The first sub-pixel P1 may include a first light-emitting element 21a emitting the first color light, the second sub-pixel P2 may include a second light-emitting element 21b emitting the second color light, and the third sub-pixel P3 may include a third light-emitting element 21c emitting the third color light.

[0092] In some examples, the first color light may be green, the second color light may be red, and the third color light may be blue. The first light emitting element 21a may be a green light emitting element, the second light emitting element 21b may be a red light emitting element, and the third light emitting element c may be a blue light emitting element. However, this embodiment is not limited to this.

[0093] In some examples, as shown in Figures 2 and 3, a pixel unit in display area AA may include: a first subpixel P1, a second subpixel P2, and a third subpixel P3. In a pixel unit, the first light-emitting element 21a of the first subpixel P1 and the second light-emitting element 21b of the second subpixel P2 may be aligned along the first direction X, and the third light-emitting element 21c of the third subpixel P3 may be located on the same side of the first light-emitting element 21a and the second light-emitting element 21b in the second direction Y. Multiple pixel units in display area AA may be arranged in an array along the first direction X and the second direction Y, such that the first light-emitting elements 21a of the first subpixels P1 and the second light-emitting elements 21b of the second subpixels P2 are arranged in a row along the first direction X, and the third light-emitting elements 21c of the third subpixels P3 are arranged in a row along the first direction X. The row of third light-emitting elements 21c and the row of light-emitting elements including the first light-emitting elements 21a and the second light-emitting elements 21b may be arranged in the second direction Y. The multiple third light-emitting elements 21c may be aligned in the second direction Y.

[0094] In some examples, as shown in Figures 2 to 4, the first light-emitting element 21a can include a first anode 211a, the second light-emitting element 21b can include a second anode 211b, and the third light-emitting element 21c can include a third anode 211c. The orthographic projections of the first anode 211a, the second anode 211b, and the third anode 211c onto the substrate can all be substantially rectangular. The first anode 211a can be integrally connected to the first anode connecting electrode 214a. The first anode connecting electrode 214a can be connected to a pixel circuit that drives the first light-emitting element 21a to emit light. The first anode connecting electrode 214a can be located on a side of the first anode 211a proximal to the third anode 211c. The second anode 211b can be integrally connected to the second anode connecting electrode 214b. The second anode connecting electrode 214b can be connected to a pixel circuit that drives the second light-emitting element 21b to emit light. The second anode connecting electrode 214b can be located on a side of the second anode 211b proximal to the third anode 211c. The third anode 211c can be connected to the third anode connecting electrode 214c as an integral structure. The third anode connecting electrode 214c can be connected to the pixel circuit that drives the third light-emitting element 21c to emit light. The third anode connecting electrode 214c can be located on one side of the third anode 211c in the first direction X and adjacent to the second anode 211b in the second direction Y. This embodiment is not limited to this.

[0095] In some examples, as shown in Figures 2 and 3, the first light-emitting element 21a may include a first light-emitting region 210a, the second light-emitting element 21b may include a second light-emitting region 210b, and the third light-emitting element 21c may include a third light-emitting region 210c. The orthographic projections of the first light-emitting region 210a, the second light-emitting region 210b, and the third light-emitting region 210c on the substrate may be substantially rectangular. The area of ​​the first light-emitting region 210a may be smaller than that of the second light-emitting region 210b, and the area of ​​the second light-emitting region 210b may be smaller than that of the third light-emitting region 210c. The orthographic projection of the first light-emitting region 210a on the substrate may be located within the orthographic projection of the first anode 211a on the substrate, the orthographic projection of the second light-emitting region 210b on the substrate may be located within the orthographic projection of the second anode 211b on the substrate, and the orthographic projection of the third light-emitting region 210c on the substrate may be located within the orthographic projection of the third anode 211c on the substrate.

[0096] In some examples, as shown in Figures 2 and 3, the display area AA may further include an organic isolation structure 31 on a plane parallel to the display substrate. The organic isolation structure 31 may include a plurality of first organic spacer columns 311a and 311b. The plurality of first organic spacer columns 311a and 311b may be independently arranged. The extension direction of the first organic spacer columns 311a and the extension direction of the first organic spacer columns 311b may intersect, for example, may be perpendicular to each other. For example, the first organic spacer columns 311a may extend along the second direction Y, and the first organic spacer columns 311b may extend along the first direction X. The orthographic projection of the first organic spacer columns 311a onto the substrate may be approximately strip-shaped extending along the second direction Y, and the orthographic projection of the first organic spacer columns 311b onto the substrate may be approximately strip-shaped extending along the first direction X. However, this embodiment is not limited to this. In other examples, the multiple first organic isolation columns 311a and 311b of the organic isolation structure 31 can be an integrated structure connected to each other, thereby forming a mesh structure in the display area AA, and the first light-emitting area of ​​each first light-emitting element, the second light-emitting area of ​​each second light-emitting element, and the third light-emitting area of ​​a row of third light-emitting elements are separated within the corresponding grid.

[0097] In some examples, as shown in Figures 2 and 3, the first organic spacer 311a can be located in the interval between the first light-emitting region 210a of the first light-emitting element 21a and the second light-emitting region 210b of the adjacent second light-emitting element 21b. For example, one first organic spacer 311a can be provided between each first light-emitting region 210a of the first light-emitting element 21a and the second light-emitting region 210b of the second light-emitting element 21b. The orthographic projection of the first organic spacer 311a on the substrate may not overlap with the orthographic projection of the first light-emitting region 210a of the first light-emitting element 21a and the second light-emitting region 210b of the second light-emitting element 21b on the substrate. The orthographic projection of the first organic spacer 311a on the substrate may not overlap with the orthographic projection of the first anode 211a of the first light-emitting element 21a and the second anode 211b of the second light-emitting element 21b on the substrate. However, this embodiment is not limited to this. For example, the orthographic projection of the first organic isolation column 311a on the substrate may overlap with the orthographic projection of the first anode 211a of the first light-emitting element 21a and the second anode 211b of the second light-emitting element 21b on the substrate, and has no overlap with the orthographic projection of the first light-emitting region 210a and the second light-emitting region 210b on the substrate.

[0098] In some examples, as shown in Figures 2 and 3, the first organic spacer column 311b can be located between the third light-emitting region 210c of the third light-emitting element 21c and the first light-emitting region 210a of the adjacent first light-emitting element 21a and the second light-emitting region 210b of the adjacent second light-emitting element 21b. The orthographic projection of the first organic spacer column 311b on the substrate does not overlap with the orthographic projections of the first light-emitting region 210a, the second light-emitting region 210b, and the third light-emitting region 210c on the substrate. The orthographic projection of the first organic spacer column 311b on the substrate may not overlap with the orthographic projection of the third anode 211c of the third light-emitting element 21c on the substrate. The orthographic projection of the first organic spacer column 311b on the substrate may partially overlap with the orthographic projections of the first anode connecting electrode 214a and the second anode connecting electrode 214b on the substrate, and does not overlap with the orthographic projection of the third anode connecting electrode 214c on the substrate. However, this embodiment is not limited to this. In some other examples, the orthographic projection of the first organic spacer 311 b on the substrate may partially overlap with the orthographic projection of the third anode connection electrode 214 c on the substrate.

[0099] In some examples, as shown in Figures 2 and 3, the length of the first organic spacer 311a along the second direction Y can be less than or equal to the length of the first anode 211a of the first light-emitting element 21a along the second direction Y. The length of the first anode 211a of the first light-emitting element 21a along the second direction Y can be approximately the same as the length of the second anode 211b of the second light-emitting element 21b along the second direction Y. The length of the first organic spacer 311b along the first direction X can be greater than the length of the third anode 211c of the third light-emitting element 21c along the first direction X. The length of the first organic spacer 311b along the first direction X can be greater than or equal to the sum of the length of the first anode 211a of the first light-emitting element 21a along the first direction X and the length of the second anode 211b of the second light-emitting element 21b along the first direction X. However, this embodiment is not limited to this.

[0100] In some examples, as shown in Figures 2 and 3, the first organic spacer 311a may include: a stacked first spacer layer 3111 and a second spacer layer 3112. The second spacer layer 3112 may be located on a side of the first spacer layer 3111 away from the substrate. The orthographic projection of the second spacer layer 3112 on the substrate may be located within the orthographic projection of the first spacer layer 3111 on the substrate. In other words, the orthographic projection of the first spacer layer 3111 on the substrate may cover the orthographic projection of the second spacer layer 3112 on the substrate. The length of the first spacer layer 3111 of the first organic spacer 311a (e.g., the length along the second direction Y) may be greater than the length of the second spacer layer 3112, and the width of the first spacer layer 3111 (e.g., the length along the first direction X) may be greater than the width of the second spacer layer 3112. The structure of the first organic spacer 311b is similar to that of the first organic spacer 311a, and therefore will not be described in detail here.

[0101] In some examples, as shown in Figures 2 and 3, on a plane parallel to the display substrate, the display area AA may further include: a plurality of support columns 41. The plurality of support columns 41 may be independently arranged. The orthographic projection of the support column 41 on the substrate may be roughly rectangular. The plurality of support columns 41 may be configured to support the FMM during the evaporation process. The support columns 41 may be arranged in the intervals between adjacent first light-emitting elements 21c. For example, in each row of third light-emitting elements 21c, one support column 41 may be provided between two third light-emitting elements 21c. Three rows of light-emitting elements (including a row of third light-emitting elements, and two rows of light-emitting elements including first light-emitting elements and second light-emitting elements) may be spaced between two adjacent support columns 41 aligned in the second direction Y. However, this embodiment does not limit the location of the support columns.

[0102] FIG5 is a schematic partial cross-sectional view along the Q1-Q1' direction in FIG3. The cross-sectional structure of the first organic isolation column 311a is used as an example for explanation below. In some examples, as shown in FIG5, in a direction perpendicular to the display substrate, the display area may include: a substrate 10, and a circuit structure layer 11, a light-emitting structure layer, an organic isolation structure, and an encapsulation structure layer arranged on the substrate 10. The circuit structure layer 11 may include a plurality of pixel circuits, and the light-emitting structure layer may include a plurality of light-emitting elements. At least one pixel circuit may be connected to at least one light-emitting element. For example, a plurality of pixel circuits may be electrically connected to a plurality of light-emitting elements in a one-to-one correspondence, or a pixel circuit may be electrically connected to a plurality of light-emitting elements, or a plurality of pixel circuits may be electrically connected to the same light-emitting element. However, this embodiment is not limited to this.

[0103] In some examples, the pixel circuit may include multiple transistors and at least one storage capacitor. For example, the circuit structure layer 11 may include: a semiconductor layer, a first gate insulating layer, a first gate metal layer, a second gate insulating layer, a second gate metal layer, an interlayer insulating layer, a first source-drain metal layer, a passivation layer, a first flat layer, a second source-drain metal layer, and a second flat layer, provided on the substrate. The semiconductor layer may include: an active layer of multiple transistors of the pixel circuit, the first gate metal layer may include: gates of multiple transistors and a first electrode of the storage capacitor, the second gate metal layer may include: a second electrode of the storage capacitor, the first source-drain metal layer may include: sources and drains of multiple transistors, and the second source-drain metal layer may include: multiple connection electrodes connected to the anode layer. However, this embodiment is not limited to this. In other examples, the circuit structure layer may include: a first semiconductor layer, a first gate insulating layer, a first gate metal layer, a second gate insulating layer, a second gate metal layer, a third gate insulating layer, a second semiconductor layer, a fourth gate insulating layer, a third gate metal layer, an interlayer insulating layer, a first source-drain metal layer, a passivation layer, a first flat layer, a second source-drain metal layer, and a second flat layer, provided on the substrate. In other examples, the circuit structure layer may include: a first semiconductor layer, a first gate insulation layer, a first gate metal layer, a second gate insulation layer, a second gate metal layer, a third gate insulation layer, a second semiconductor layer, a fourth gate insulation layer, a third gate metal layer, an interlayer insulation layer, a first source-drain metal layer, a passivation layer, a first planarizing layer, a second source-drain metal layer, a second planarizing layer, a third source-drain metal layer, and a third planarizing layer arranged on a substrate.

[0104] In some examples, as shown in FIG5 , in a direction perpendicular to the display substrate, the light emitting structure layer may include: an anode layer, a pixel definition layer 24, a light emitting functional layer, and a cathode layer. The anode layer may include: anodes of multiple light emitting elements (e.g., a first anode 211a of a first light emitting element 21a, a second anode 211b of a second light emitting element 21b), and multiple anode connection electrodes (e.g., a first anode connection electrode 214a, a second anode connection electrode 214b, and a third anode connection electrode 214c shown in FIG4 ).

[0105] In some examples, as shown in FIG5 , the pixel definition layer 24 may have a plurality of pixel openings (e.g., a first pixel opening K1, a second pixel opening K2, and a third pixel opening). The pixel definition layer 24 within the first pixel opening K1 may be removed to expose a portion of the surface of the first anode 211 a. The pixel definition layer 24 within the second pixel opening K2 may be removed to expose a portion of the surface of the second anode 211 b. The pixel definition layer within the third pixel opening may be removed to expose a portion of the surface of the third anode 211 c.

[0106] In some examples, as shown in FIG5 , the light-emitting functional layer may include: a first portion located in the light-emitting region of the light-emitting element (for example, including a first portion 213a located in the light-emitting region of the first light-emitting element 21a, a first portion 213b located in the light-emitting region of the second light-emitting element 21b, and a first portion located in the light-emitting region of the third light-emitting element 21c), and a second portion located in the interval between adjacent light-emitting elements (for example, including a second portion 213d located between the first light-emitting element 21a and the second light-emitting element 21b). The light-emitting functional layer located in the light-emitting region of the light-emitting element may contact the corresponding anode of the anode layer through the pixel opening. The orthographic projection of the second portion 213d of the light-emitting functional layer on the substrate may cover the orthographic projection of the first organic isolation column 311a on the substrate.

[0107] In some examples, as shown in FIG5 , the cathode layer may include: cathodes of multiple light-emitting elements (e.g., cathode 212a of the first light-emitting element 21a, cathode 212b of the second light-emitting element 21b, and cathode of the third light-emitting element), and cathode connectors located at intervals between adjacent light-emitting elements (e.g., cathode connector 212d located between the first light-emitting element 21a and the second light-emitting element 21b). The cathode layer is located on the side of the light-emitting functional layer away from the substrate and may be in direct contact with the light-emitting functional layer. The cathodes of the multiple light-emitting elements and the cathode connectors may be interconnected integral structures. For example, the cathode 212a of the first light-emitting element 21a and the cathode 212b of the second light-emitting element 21b may be interconnected via cathode connector 212d. The orthographic projection of the cathode connector 212d of the cathode layer on the substrate may cover the orthographic projection of the first organic isolation column 311a on the substrate. In this example, the light-emitting region of a light-emitting element may refer to the overlapping region of the anode, light-emitting functional layer, and cathode of the light-emitting element corresponding to the pixel opening.

[0108] In some examples, as shown in FIG5 , the first organic spacer column 311 a can be located on a surface of the pixel definition layer 24 that is away from the substrate 10. The orthographic projection of the first organic spacer column 311 a on the substrate can be located within the orthographic projection of the pixel definition layer 24 on the substrate. In other words, the orthographic projection of the pixel definition layer 24 on the substrate can cover the orthographic projection of the first organic spacer column 311 a on the substrate. The orthographic projection of the first isolation layer 3111 of the first organic spacer column 311 a on the substrate can cover the orthographic projection of the second isolation layer 3112 on the substrate.

[0109] In some examples, as shown in FIG5 , the first isolation layer 3111 of the first organic spacer column 311a may include a first bottom surface 321, a first top surface 322, a first side surface 331 connecting the first bottom surface 321 and the first top surface 322, and a second side surface 332. The first bottom surface 321 is located on the side of the first top surface 322 closer to the substrate 10, and the first side surface 331 may face the second side surface 332. In a plane perpendicular to the extension direction of the first organic spacer column 311a and perpendicular to the substrate, the cross-sectional shape of the first isolation layer 3111 may be approximately trapezoidal, such as an isosceles trapezoid. The dimensions of the first top surface 322 may be smaller than those of the first bottom surface 321. The orthographic projection of the first bottom surface 321 on the substrate may overlap the orthographic projection of the first top surface 322 on the substrate. For example, the orthographic projections of the first top surface 322 and the first bottom surface 321 on the substrate may be rectangles of different sizes. The length of the orthographic projection of the first top surface 322 on the substrate may be smaller than the length of the orthographic projection of the first bottom surface 321 on the substrate, and the width of the orthographic projection of the first top surface 322 on the substrate may be smaller than the width of the orthographic projection of the first bottom surface 321 on the substrate.

[0110] In some examples, as shown in FIG5 , a first angle a1 may be formed between the first side surface 331 and the first bottom surface 321, and a second angle a2 may be formed between the second side surface 332 and the first bottom surface 321. The first angle a1 and the second angle a2 may be substantially the same. For example, the first angle a1 and the second angle a2 may be greater than 0 degrees and less than or equal to 80 degrees. However, this embodiment is not limited to this. In other examples, the first angle a1 may be different from the second angle a2.

[0111] In some examples, as shown in FIG5 , the second isolation layer 3112 of the first organic spacer column 311a may include a second bottom surface 323, a second top surface 324, a third side surface 333 connecting the second bottom surface 331 and the second top surface 332, and a fourth side surface 334. The second bottom surface 323 is located on the side of the second top surface 324 closer to the substrate 10, and the third side surface 333 may face the fourth side surface 334. The second bottom surface 323 is in direct contact with the first top surface 322. In a plane perpendicular to the extension direction of the first organic spacer column 311a and perpendicular to the substrate, the cross-section of the second isolation layer 3112 may be approximately trapezoidal, for example, an isosceles trapezoid. The size of the second top surface 324 may be smaller than that of the second bottom surface 323, which in turn may be smaller than that of the first top surface 322. The orthographic projection of the first top surface 322 onto the substrate may overlap the orthographic projection of the second bottom surface 323 onto the substrate, and the orthographic projection of the second bottom surface 323 onto the substrate may overlap the orthographic projection of the second top surface 324 onto the substrate. In other words, the bottom dimension of the first isolation layer 3111 can be larger than the top dimension, the bottom dimension of the second isolation layer 3112 can be larger than the top dimension, and the top dimension of the first isolation layer 3111 can be larger than the bottom dimension of the second isolation layer 3112. For example, the orthographic projections of the second top surface 324, the second bottom surface 323, and the first top surface 322 on the substrate can be rectangles of different sizes. The length of the orthographic projection of the second top surface 324 on the substrate can be smaller than the length of the orthographic projection of the second bottom surface 323 on the substrate, and the length of the orthographic projection of the second bottom surface 323 on the substrate can be smaller than the length of the orthographic projection of the first top surface 322 on the substrate; the width of the orthographic projection of the second top surface 324 on the substrate can be smaller than the width of the orthographic projection of the second bottom surface 323 on the substrate, and the width of the orthographic projection of the second bottom surface 323 on the substrate can be smaller than the width of the orthographic projection of the first top surface 322 on the substrate. A portion of the first top surface 323 of the first isolation layer 3111 that is not blocked by the second bottom surface 323 of the second isolation layer 3112 may form a stepped surface and contact the second portion 213 d of the light emitting functional layer of the light emitting element.

[0112] In some examples, as shown in Figure 5, a third angle a3 may be formed between the third side surface 333 and the second bottom surface 323, and a fourth angle a4 may be formed between the fourth side surface 334 and the second bottom surface 323. The third angle a3 and the fourth angle a4 may be substantially the same. The third angle a3 may be the same as the first angle a1, and the fourth angle a4 may be the same as the second angle a2. For example, the third angle a3 and the fourth angle a4 may be greater than 0 degrees and less than or equal to 80 degrees. However, this embodiment is not limited to this. In other examples, the third angle a3 may be different from the fourth angle a4. In other examples, the first angle a1, the second angle a2, the third angle a3, and the fourth angle a4 may be different from each other, or may be partially the same.

[0113] In some examples, the centerline of the first organic spacer column 311a along the first direction X may coincide with the centerline of the interval between the first light-emitting element 21a and the second light-emitting element 21b in the first direction X. In other words, the first organic spacer column 311a may be centered in the interval between the first light-emitting element 21a and the second light-emitting element 21b. However, this embodiment is not limited to this. In other examples, the centerline of the first organic spacer column 311a along the first direction X may be located on a side of the interval between the first light-emitting element 21a and the second light-emitting element 21b in the first direction X that is closer to the first light-emitting element 21a, or may be located on a side of the interval between the first light-emitting element 21a and the second light-emitting element 21b in the first direction X that is closer to the second light-emitting element 21b.

[0114] In some examples, the centerline of the first isolation layer 3111 of the first organic isolation column 311a along the first direction X may substantially coincide with the centerline of the second isolation layer 3112 along the first direction X. However, this embodiment is not limited to this. For example, the centerline of the first isolation layer 3111 of the first organic isolation column 311a along the first direction X may be offset from the centerline of the second isolation layer 3112 along the first direction X by a certain distance.

[0115] In some examples, as shown in FIG5 , a first distance L1 is defined between an edge of the first side surface 331 of the first isolation layer 3111 of the first organic spacer 311a and an edge of the light-emitting region 210a of the adjacent first light-emitting element 21a, and a second distance L2 is defined between an edge of the second side surface 332 of the first isolation layer 3111 and an edge of the light-emitting region 210b of the adjacent first light-emitting element 21b. For example, the first distance L1 and the second distance L2 can be the same. The first organic spacer 311a can be located between the first light-emitting element 21a and the second light-emitting element 21b. In other examples, the first distance L1 can be greater than the second distance L2. The first organic spacer 311a can be positioned adjacent to the first light-emitting element 21b. In other examples, the first distance L1 can be less than the second distance L2. The first organic spacer 311a can be positioned adjacent to the first light-emitting element 21a. This embodiment is not limited to this.

[0116] In some examples, as shown in FIG5 , the thickness h1 of the first isolation layer 3111 of the first organic spacer 311a can be less than the thickness h2 of the second isolation layer 3112. The thickness h1 of the first isolation layer 3111 can refer to the vertical distance between the first top surface 322 and the first bottom surface 321, while the thickness h2 of the second isolation layer 3112 can refer to the vertical distance between the second top surface 324 and the second bottom surface 323. For example, the thickness h1 of the first isolation layer 3111 can range from 0.2 microns to 1.1 microns, such as 0.2 microns, 0.8 microns, or 1.1 microns. The thickness h2 of the second isolation layer 3112 can range from 1.2 microns to 1.6 microns, such as 1.2 microns, 1.5 microns, or 1.6 microns.

[0117] In some examples, the support pillars can be disposed in the same layer as the pixel definition layer. The material of the support pillars can be the same as that of the pixel definition layer and different from that of the first organic spacer pillars. For example, the first organic spacer pillars can be made of a negative photoresist, while the support pillars and the pixel definition layer can be made of a positive photoresist.

[0118] In some examples, the minimum height of the support column can be greater than the maximum height of the first organic spacer column. The height of the support column can refer to the vertical distance between the surface of the support column away from the substrate and the surface of the substrate. The height of the first organic spacer column can refer to the vertical distance between the second top surface and the surface of the substrate. In some examples, the thickness of the support column can range from 1.5 microns to 3.0 microns, such as approximately 2.3 microns to 2.5 microns, for example, 2.3 microns or 2.5 microns. In this example, by setting the minimum height of the support column to be greater than the maximum height of the first organic spacer column, the occurrence of scratches between the FMM and the first organic spacer column can be reduced.

[0119] Figure 6A is a partially enlarged schematic diagram of area A3 in Figure 5. Figure 6B is a partially enlarged schematic diagram of area A4 in Figure 5. In some examples, as shown in Figures 6A and 6B, the light-emitting functional layer may include: a stacked first hole transport layer 2132a, a first light-emitting layer 2131a, a first hole blocking layer 2133a, a first charge generation layer 2135a, a second charge generation layer 2135b, a second hole transport layer 2132b, a second light-emitting layer 2131b, a second hole blocking layer 2133b, and an electron transport layer 2134. The first charge generation layer 2135a may be an N-type charge generation layer (N-CGL), and the second charge generation layer 2135b may be a P-type charge generation layer (P-CGL). The first charge generation layer 2135a and the second charge generation layer 2135b may have strong conductivity, so that the light-emitting functional layer has the advantages of long life, low power consumption, and high brightness. For example, compared with a light-emitting functional layer without a charge generation layer, the light-emitting brightness of the light-emitting element can be increased by nearly double by providing a charge generation layer in the light-emitting functional layer.

[0120] In some examples, the first light-emitting layer and the second light-emitting layer of the same light-emitting element can be light-emitting layers that emit the same color of light. The first light-emitting layer 2131a and the second light-emitting layer 2131b of the first light-emitting element 21a can be light-emitting layers that emit the same color of light. For example, the first light-emitting layer 2131a and the second light-emitting layer 2131b can be green light-emitting layers. The first light-emitting layer and the second light-emitting layer of the second light-emitting element 21b can both be red light-emitting layers, and the first light-emitting layer and the second light-emitting layer of the third light-emitting element can both be blue light-emitting layers. However, this embodiment is not limited to this. In other examples, the first light-emitting layer and the second light-emitting layer of the same light-emitting element can be light-emitting layers that emit different colors of light. By providing light-emitting layers that emit different colors of light in the same light-emitting element, the light emitted by the multiple light-emitting layers included in the light-emitting element can be mixed into white light. By providing a color filter layer, the color of the output light of each light-emitting element can be adjusted.

[0121] In some examples, as shown in Figures 5 to 6B , a first portion 213a of the light-emitting functional layer located in the first light-emitting region of the first light-emitting element 21a and a first portion 213b located in the second light-emitting region of the second light-emitting element 21b can be connected via a second portion 213d. The second portion 213d can be located within the gap between the first light-emitting element 21a and the second light-emitting element 21b and can contact the surface of the first organic spacer 311a facing away from the substrate. The orthographic projection of the second portion 213d of the light-emitting functional layer on the substrate can overlap the orthographic projection of the first organic spacer 311a on the substrate.

[0122] In some examples, the first light-emitting layer 2131a of the first light-emitting element 21a and the first light-emitting layer of the second light-emitting element 21b may overlap or contact each other at the interval between the first light-emitting element 21a and the second light-emitting element 21b. The second portion 213d of the light-emitting functional layer may include: the overlapping or contacting location of the first light-emitting layer 2131a of the first light-emitting element 21a and the first light-emitting layer of the second light-emitting element 21b. The orthographic projection of the overlapping or contacting location of the first light-emitting layer 2131a of the first light-emitting element 21a and the first light-emitting layer of the second light-emitting element 21b on the substrate may overlap with the orthographic projection of the first organic spacer 311a on the substrate. For example, the orthographic projection of the first organic spacer 311a on the substrate may cover the orthographic projection of the overlapping or contacting location of the first light-emitting layer 2131a of the first light-emitting element 21a and the first light-emitting layer of the second light-emitting element 21b on the substrate. However, this embodiment is not limited to this. In other examples, the overlapping or contacting position of the first light-emitting layer 2131a of the first light-emitting element 21a and the first light-emitting layer of the second light-emitting element 21b may not overlap with the orthographic projection of the first organic spacer 311a on the substrate. For example, the overlapping or contacting position may be located on a side of the first organic spacer 311a closer to the first light-emitting element 21a or the second light-emitting element 21b. In other examples, the first light-emitting layer 2131a of the first light-emitting element 21a and the first light-emitting layer of the second light-emitting element 21b may not be in contact with each other. For example, the orthographic projection of the first light-emitting layer of the first light-emitting element 21a and the second light-emitting element 21b on the substrate may not overlap with the orthographic projection of the first organic spacer on the substrate.

[0123] In some examples, the second light-emitting layer 2131b of the first light-emitting element 21a and the second light-emitting layer of the second light-emitting element 21b may overlap or contact each other at the interval between the first light-emitting element 21a and the second light-emitting element 21b. The second portion 213d of the light-emitting functional layer may include: the overlapping or contacting location of the second light-emitting layer 2131b of the first light-emitting element 21a and the second light-emitting layer of the second light-emitting element 21b. The orthographic projection of the overlapping or contacting location of the second light-emitting layer 2131b of the first light-emitting element 21a and the second light-emitting layer of the second light-emitting element 21b on the substrate may overlap with the orthographic projection of the first organic spacer 311a on the substrate. For example, the orthographic projection of the first organic spacer 311a on the substrate may cover the orthographic projection of the overlapping or contacting location of the second light-emitting layer 2131b of the first light-emitting element 21a and the second light-emitting layer of the second light-emitting element 21b on the substrate. However, this embodiment is not limited to this. In other examples, the overlapping or contacting position of the second light-emitting layer 2131b of the first light-emitting element 21a and the second light-emitting layer of the second light-emitting element 21b may not overlap with the orthographic projection of the first organic spacer 311a on the substrate. For example, the overlapping or contacting position may be located on a side of the first organic spacer 311a closer to the first light-emitting element 21a or the second light-emitting element 21b. In other examples, the second light-emitting layer 2131b of the first light-emitting element 21a and the second light-emitting layer of the second light-emitting element 21b may not contact each other. For example, the orthographic projection of the second light-emitting layer of the first light-emitting element 21a and the second light-emitting element 21b on the substrate may not overlap with the orthographic projection of the first organic spacer on the substrate.

[0124] In some examples, the first hole transport layer 2132a, the first hole blocking layer 2133a, the first charge generating layer 2135a, the second charge generating layer 2135b, the second hole transport layer 2132b, the second hole blocking layer 2133b and the electron transport layer 2134 can be a common layer (i.e., a common film layer) of multiple light-emitting elements. However, this embodiment is not limited to this. In other examples, only the first charge generating layer, the second charge generating layer, the first hole transport layer and the second hole transport layer can be set as a common layer; or only the first charge generating layer and the second charge generating layer can be set as a common layer.

[0125] In some examples, as shown in FIG5 , the second portion 213 d of the light-emitting functional layer located within the gap between the first light-emitting element 21 a and the second light-emitting element 21 b can be located on a side of the first organic spacer 311 a away from the substrate and in contact with the first side surface 331, the second side surface 332, the non-overlapping portion of the first top surface 322 and the second bottom surface 323, the third side surface 333, the fourth side surface 334, and the second top surface 324 of the first organic spacer 311 a. In this example, by providing the first organic spacer with a certain height, the thickness of the second portion 213 d of the light-emitting functional layer can be reduced.

[0126] In some examples, as shown in Figures 5 to 6B, taking the first charge generation layer 2135a as an example, the thickness d1 of the first charge generation layer 2135a in the first portion 213a of the light-emitting functional layer can be greater than the thickness d2 of the first charge generation layer 2135a in the second portion 213d of the light-emitting functional layer. Similarly, the thickness of the remaining film layers of the light-emitting functional layer located on the first organic spacer can be less than the thickness of the portion located in the light-emitting region. In this example, the first organic spacer can be used to thin the light-emitting functional layer (for example, including the first charge generation layer and the second charge generation layer) to increase the resistance of the light-emitting functional layer in the lateral direction between different light-emitting elements, thereby effectively improving the crosstalk problem.

[0127] In some examples, as shown in FIG5 , the encapsulation structure layer may include: a stacked first encapsulation layer 421, a second encapsulation layer, and a third encapsulation layer. The first encapsulation layer 421 may be made of an inorganic material and cover the cathode layer in the display area. The second encapsulation layer may be made of an organic material, and the third encapsulation layer may be made of an inorganic material and cover the first encapsulation layer 421 and the second encapsulation layer. However, this embodiment is not limited to this. In other examples, the encapsulation structure layer may adopt a five-layer structure of inorganic / organic / inorganic / organic / inorganic.

[0128] The light-emitting element of the display substrate of this example adopts a Tandem structure, uses a charge generation layer as a heterogeneous layer, and connects the two light-emitting layers in series, so that at the same luminous intensity, the light-emitting current of the light-emitting element can be greatly reduced, the power consumption and life of the display product can be improved, and the brightness requirements of the user can be met. When there is a crosstalk problem caused by lateral leakage current between the light-emitting elements emitting light of different colors, the first organic spacer including two isolation layers of this example is provided at the intervals between the light-emitting elements emitting light of different colors. The lateral leakage current path of the light-emitting functional layer can be extended, and the side of the first organic spacer can be used to thin the light-emitting functional layer to increase the lateral resistance within the intervals between different light-emitting elements, thereby effectively improving the crosstalk problem. The display substrate of this example does not need to reduce the conductivity of the common layer (for example, including the charge generation layer), and can ensure the power consumption of the display substrate, thereby improving the display effect. In addition, the structure of the first organic spacer in this example can ensure that the cathode layer is not isolated, which can reduce the cathode resistance and reduce the cathode cross-voltage, which is conducive to reducing the power consumption of the light-emitting element.

[0129] The organic isolation structure of the display substrate of this example is described below using an example of the preparation process of a display substrate. The "patterning process" referred to in this disclosure includes processes such as photoresist coating, mask exposure, development, etching, and photoresist stripping for metal materials, inorganic materials, or transparent conductive materials, and includes processes such as organic material coating, mask exposure, and development for organic materials. Deposition can be performed by any one or more of sputtering, evaporation, and chemical vapor deposition; coating can be performed by any one or more of spraying, spin coating, and inkjet printing; and etching can be performed by any one or more of dry etching and wet etching, which are not limited in this disclosure. A "thin film" refers to a thin film produced by depositing, coating, or other processes on a substrate using a certain material. If the "thin film" does not require a patterning process during the entire production process, the "thin film" can also be referred to as a "layer." If the "thin film" requires a patterning process during the entire production process, it is referred to as a "thin film" before the patterning process and a "layer" after the patterning process. The "layer" after the patterning process contains at least one "pattern." The shape of A can refer to the shape of the orthographic projection of A on the substrate.

[0130] FIG7 is a schematic diagram of the preparation of an organic isolation structure according to at least one embodiment of the present disclosure. In some examples, as shown in FIG7 , after forming a circuit structure layer 11 on a substrate 10, an anode film is deposited on the substrate 10 on which the circuit structure layer is formed, and the anode film is patterned by a patterning process to form an anode layer. The anode layer may be as shown in FIG4 , for example, and may include anodes of multiple light-emitting elements (including a first anode 211a of a first light-emitting element 21a, a second anode 211b of a second light-emitting element 21b, and a third anode 211c of a third light-emitting element 21c) and multiple anode connection electrodes.

[0131] Subsequently, a pixel definition film is applied, and the pixel definition film is patterned by a patterning process to form a pixel definition layer 24 and a plurality of support columns. The pixel definition layer 24 may be provided with a plurality of pixel openings (for example, including a first pixel opening K1 and a second pixel opening K2). The first pixel opening K1 may expose a portion of the surface of the first anode 211a, and the second pixel opening K2 may expose a portion of the surface of the second anode 211b. The support column may be located in the interval between adjacent light-emitting elements that emit light of the same color. The thickness of the support column may, for example, be greater than the thickness of the pixel definition layer. However, this embodiment is not limited thereto. In other examples, the support column and the pixel definition layer may be prepared by different steps. In some examples, the material of the pixel definition film may be a positive photoresist.

[0132] Subsequently, a first photoresist is applied to form a first photoresist layer, and a halftone mask (HTM) is used to expose and develop the first photoresist layer to form a first organic isolation column. The halftone mask may include a first light-transmitting area, a second light-transmitting area, and a light-shielding area. The transmittance of the first light-transmitting area may be greater than the transmittance of the second light-transmitting area. For example, the transmittance of the first light-transmitting area may be 100%, the transmittance of the second light-transmitting area may be less than 50%, and the transmittance of the light-shielding area may be 0. The first photoresist layer is exposed through the halftone mask, so that the exposed first photoresist layer forms a first exposure area corresponding to the first transparent area, a second exposure area corresponding to the second light-transmitting area, and a non-exposed area corresponding to the light-shielding area. The exposed first photoresist layer is developed to remove the first photoresist layer in the first exposed area, thereby forming a first sub-pattern S2 (including the non-overlapping portion of the first isolation layer 3111 and the second isolation layer 3112) in the second exposed area, and forming a second sub-pattern S1 (including the overlapping portion of the first isolation layer 3111 and the second isolation layer 3112) in the non-exposed area. In some examples, the first photoresist can be a negative photoresist.

[0133] In this example, a first organic isolation column can be prepared by a one-time patterning process using a half-tone mask to form a stacking structure of a first isolation layer and a second isolation layer, which can simplify the preparation steps.

[0134] FIG8 is another schematic diagram of fabricating an organic isolation structure according to at least one embodiment of the present disclosure. In some examples, as shown in FIG8 , after fabricating the pixel definition layer 24 , a first isolation layer 3111 and a second isolation layer 3112 of the first organic isolation column 311a can be sequentially formed through two patterning processes.

[0135] In some examples, a second photoresist is applied to the substrate 10 on which the pixel definition layer 24 is formed to form a second photoresist layer, and the second photoresist layer is patterned using a first mask to form a first isolation layer 3111. Subsequently, a third photoresist is applied to form a third photoresist layer, and the third photoresist layer is patterned using a second mask to form a second isolation layer 3112. In some examples, the second and third photoresists may be positive photoresists. The remaining preparation steps of this example can be referred to the description of the previous embodiment, and thus will not be repeated here.

[0136] Figure 9 is another schematic partial cross-sectional view taken along the Q1-Q1' direction in Figure 3. In some examples, as shown in Figure 9, the pixel definition layer 24 may be provided with multiple pixel openings (e.g., including a first pixel opening K1 and a second pixel opening K2) and multiple first isolation grooves V1. The first isolation grooves V1 may be located in the gaps between adjacent light-emitting elements emitting light of different colors. The pixel definition layer 24 within the first isolation grooves V1 may be removed, exposing the surface of the circuit structure layer 11 facing away from the substrate 10, for example, exposing the surface of the second planar layer facing away from the substrate. The orthographic projection of the first isolation grooves V1 on the substrate may not overlap with the orthographic projection of the anode layer on the substrate. The first organic spacer 311a may be located within the first isolation grooves V1. The orthographic projection of the first organic spacer 311a on the substrate may not overlap with the orthographic projection of the pixel definition layer 24 on the substrate. The dimensions of the first isolation grooves V1 may be larger than the dimensions of the first bottom surface of the first organic spacer 311a. For example, the edge of the first bottom surface of the first organic spacer 311a may not contact the edge of the first isolation grooves V1.

[0137] In some examples, the light-emitting functional layer can be formed on the first organic spacer column in the space between the first light-emitting element 21a and the second light-emitting element 21b, and on the bottom and sidewalls of the first isolation groove V1 on both sides of the first organic spacer column. The light-emitting functional layer can be formed in the first isolation groove V1 at a position not covered by the first organic spacer column 311a.

[0138] In some examples, multiple first isolation grooves V1 can be independently provided. A first organic isolation column 311a or 311b can be provided in each first isolation groove V1. However, this embodiment is not limited thereto. In other examples, multiple first isolation grooves can be interconnected to form a network structure of first isolation grooves, within which multiple independently provided first organic isolation columns can be provided, or multiple interconnected first organic isolation columns can be provided.

[0139] This example forms a first isolation groove in the pixel definition layer and arranges the first organic isolation column in the first isolation groove. This can reduce the height of the first organic isolation column relative to the support column used to support the FMM, thereby reducing the risk of the FMM and the first organic isolation column rubbing against each other to form dark spots. Moreover, the light-emitting functional layer can be formed on the first organic isolation column in the first isolation groove and on the bottom surface and sidewalls of the first isolation groove that are not covered by the first organic isolation column. This can further extend the lateral leakage current path of the light-emitting functional layer and further improve the crosstalk between light-emitting elements emitting light of different colors. The remaining structure of this example can be referred to the description of the aforementioned embodiment, so it will not be repeated here.

[0140] FIG10 is another schematic diagram of the preparation of an organic isolation structure according to at least one embodiment of the present disclosure. In some examples, as shown in FIG10 , after preparing the circuit structure layer 11 and the anode layer on the substrate 10, a pixel definition film is coated, and the pixel definition film is patterned by a patterning process to form a pixel definition layer 24. The pixel definition layer 24 may have a plurality of pixel openings and a first isolation groove V1 located in the interval between adjacent light-emitting elements emitting light of different colors. Subsequently, a first organic isolation column may be formed in the first isolation groove V1 using a halftone mask. The method for forming the first organic isolation column can refer to the description of the aforementioned embodiment, so it will not be repeated here.

[0141] Figure 11 is another partial cross-sectional schematic diagram along the Q1-Q1' direction in Figure 3. In some examples, as shown in Figure 11, the pixel definition layer 24 can be provided with a plurality of pixel openings and a plurality of second isolation grooves V2. The second isolation grooves V2 can be located in the interval between adjacent light-emitting elements that emit light of different colors. Part of the pixel definition layer 24 in the second isolation grooves V2 can be removed, and part of the pixel definition layer 24 can be retained. The thickness of the pixel definition layer 24 in the second isolation grooves V2 can be less than the thickness of the surrounding pixel definition layers 24. The first organic isolation column 311a can be located in the second isolation grooves V2. The orthographic projection of the pixel definition layer 24 on the substrate can cover the orthographic projection of the first organic isolation column 311a on the substrate.

[0142] In this example, by thinning the pixel definition layer to form a second isolation groove and placing the first organic isolation column in the second isolation groove, the height of the first organic isolation column relative to the support column used to support the FMM can be reduced, which can reduce the risk of the FMM and the first organic isolation column rubbing against each other to form dark spots. In addition, the light-emitting functional layer can be formed on the first organic isolation column in the second isolation groove and on the bottom surface and sidewalls of the second isolation groove not covered by the first organic isolation column, which can further extend the lateral leakage current path of the light-emitting functional layer and further improve the crosstalk between the light-emitting elements. The remaining structure of this example can be referred to the description of the previous embodiment, so it will not be repeated here.

[0143] Figure 12 is another partial enlarged schematic diagram of area A1 in Figure 1. Figure 13 is a partial enlarged schematic diagram of area A5 in Figure 12. Figure 14 is a partial cross-sectional schematic diagram along the Q2-Q2' direction in Figure 13.

[0144] In some examples, as shown in Figures 12 and 13, the organic isolation structure 31 may include a plurality of first organic spacer pillars 311a and 311b. The plurality of first organic spacer pillars 311a and 311b may be independently disposed. Two first organic spacer pillars 311a extending in the same direction may be disposed in the interval between the first light-emitting region 210a of the first light-emitting element 21a and the second light-emitting region 210b of the adjacent second light-emitting element 21b. Two first organic spacer pillars 311b extending in the same direction may be disposed in the interval between the third light-emitting region 210c of the third light-emitting element 21c and the first light-emitting region 210a of the adjacent first light-emitting element 21a and the second light-emitting region 210b of the adjacent second light-emitting element 21b. The spacing between the two first organic spacer pillars 311a and the spacing between the two first organic spacer pillars 311b may be set according to actual needs. This embodiment is not limited to this. In other examples, three or more first organic spacer pillars extending in the same direction may be disposed in the interval between adjacent light-emitting elements emitting light of different colors.

[0145] 14 , two first organic spacers 311a disposed between the first and second light emitting elements 21a and 21b may be located on the pixel definition layer 24. The two first organic spacers 311a may have substantially the same structure and shape.

[0146] This example provides two first organic spacers between adjacent light-emitting elements emitting different colors. By increasing the number of first organic spacers, the leakage current path of the light-emitting functional layer within the gap between adjacent light-emitting elements can be doubled. Furthermore, the light-emitting functional layer on the sidewalls of the first organic spacers can be thinned, doubling the resistance and achieving a good crosstalk isolation effect. The remaining description of this example can be found in the description of the previous embodiment, and will not be repeated here.

[0147] Figure 15 is another partial cross-sectional schematic diagram along the Q2-Q2' direction in Figure 13. In some examples, as shown in Figure 15, the pixel definition layer 24 can be provided with a plurality of large pixel openings and a plurality of first isolation grooves V1. The first isolation groove V1 can be located in the interval between adjacent light-emitting elements that emit light of different colors. The pixel definition layer 24 in the first isolation groove V1 can be removed to expose the surface of the circuit structure layer 11 away from the substrate 10, for example, the surface of the second flat layer away from the substrate can be exposed. However, this embodiment is not limited to this. In other examples, the pixel definition layer can be thinned to form a second isolation groove, and a first organic isolation column can be provided in the second isolation groove.

[0148] In some examples, multiple first isolation grooves V1 can be independently provided. Two first organic spacer columns 311a or two first organic spacer columns 311b can be provided in each first isolation groove V1. The edges of the two first organic spacer columns 311a do not contact the edges of the first isolation groove V1 in which they are located.

[0149] In this example, by forming a first isolation groove in the pixel definition layer and disposing the first organic isolation column in the first isolation groove, the height of the first organic isolation column relative to the support column for supporting the FMM can be reduced, and the risk of the FMM and the first organic isolation column rubbing against each other to form dark spots can be reduced. Moreover, by increasing the number of first organic isolation columns disposed in the first isolation groove, the leakage current path of the light-emitting functional layer within the interval between adjacent light-emitting elements can be doubled, and the light-emitting functional layer on the sidewall of the first organic isolation column can be thinned, which can double the resistance, thereby achieving a good crosstalk isolation effect. The remaining description of this example can refer to the description of the aforementioned embodiment, so it will not be repeated here.

[0150] Figure 16 is another partially enlarged schematic diagram of area A1 in Figure 1. Figure 17 is a partially enlarged schematic diagram of area A6 in Figure 16. Figure 18 is a partially cross-sectional schematic diagram along the Q3-Q3' direction in Figure 17.

[0151] In some examples, as shown in Figures 16 and 17, the organic isolation structure 31 may include: a plurality of first organic spacer columns 311a and 311b and a plurality of second organic spacer columns 312a and 312b. The plurality of first organic spacer columns 311a and 311b may be provided independently of each other, and the plurality of second organic spacer columns 312a and 312b may be provided independently. Two first organic spacer columns 311a and one second organic spacer column 312a extending in the same direction may be provided in the space between the first light-emitting region 210a of the first light-emitting element 21a and the second light-emitting region 210b of the adjacent second light-emitting element 21b. The second organic spacer column 312a may be located between the two first organic spacer columns 311a. Two first organic spacers 311b and one second organic spacer 312b extending in the same direction can be disposed between the third light-emitting region 210c of the third light-emitting element 21c and the first light-emitting region 210a of the adjacent first light-emitting element 21a and the second light-emitting region 210b of the adjacent second light-emitting element 21b. The second organic spacer 312b can be located between the two first organic spacers 311b. The spacing between adjacent first and second organic spacers can be adjusted based on actual needs. This embodiment does not limit this.

[0152] In some examples, as shown in FIG18 , two first organic spacers 311 a and one second organic spacer 312 a disposed within the space between the first light-emitting element 21 a and the second light-emitting element 21 b may be located on the pixel definition layer 24. The two first organic spacers 311 a may have substantially the same structure and shape. The thickness of the second organic spacer 312 a may be less than or equal to the thickness of the first organic spacer 311 a.

[0153] In some examples, as shown in FIG18 , the second organic spacer 312a may include a third bottom surface 341, a third top surface 342, and a fifth side surface 343 and a sixth side surface 344 connecting the third bottom surface 341 and the third top surface 342. The third bottom surface 341 is located on the side of the third top surface 342 closer to the substrate. The fifth side surface 343 may face the sixth side surface 344. The dimensions of the third bottom surface 341 may be smaller than those of the third top surface 342, and the orthographic projection of the third top surface 342 onto the substrate may overlap the orthographic projection of the third bottom surface 341 onto the substrate. For example, the orthographic projections of the third bottom surface 341 and the third top surface 342 onto the substrate may be substantially rectangular, the length of the orthographic projection of the third bottom surface 341 onto the substrate may be smaller than the length of the orthographic projection of the third top surface 342 onto the substrate, and the width of the orthographic projection of the third bottom surface 341 onto the substrate may be smaller than the width of the orthographic projection of the third top surface 342 onto the substrate. In this way, a second organic spacer with an inverted trapezoidal cross-sectional structure can be formed, and the light-emitting functional layer is more easily cut off at the bottom corner position of the second organic spacer during deposition, forming an "undercut" structure, which can further isolate the lateral leakage current between adjacent light-emitting elements and improve the crosstalk between adjacent light-emitting elements. However, this embodiment is not limited to this. In other examples, the size of the third bottom surface 341 can be equal to the size of the third top surface 342, and the orthographic projection of the third top surface 342 on the substrate can coincide with the orthographic projection of the third bottom surface 341 on the substrate, thereby forming a rectangular cross-sectional structure.

[0154] In some examples, the first organic spacers 311a can be fabricated using a positive photoresist, and the second organic spacers 312a can be fabricated using a negative photoresist. For example, after fabricating the pixel definition layer, the first organic spacers and the second organic spacers can be fabricated sequentially, or the second organic spacers and the first organic spacers can be fabricated sequentially. The fabrication method for the first organic spacers can refer to the description of the preceding embodiment, and the fabrication method for the second organic spacers can refer to the fabrication method for the first organic spacers, and therefore will not be further described here.

[0155] This example, by disposing two first organic spacers and one second organic spacer between adjacent light-emitting elements emitting different colors, ensures that leakage current from the light-emitting functional layer of a light-emitting element to adjacent light-emitting elements of other colors is reduced to zero when a single low-grayscale light source is illuminated, completely eliminating crosstalk between light-emitting elements caused by the light-emitting functional layer. The remaining description of this example can be found in the previous embodiment and is therefore not repeated here.

[0156] This application describes multiple embodiments, but this description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in this application. Although many possible feature combinations are shown in the drawings and discussed in the embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0157] In other examples, two first organic spacers with the same extension direction can be set in the interval between adjacent light-emitting elements emitting light of different colors. One of the first organic spacers can be set in the first isolation groove of the pixel definition layer so as not to overlap with the orthographic projection of the pixel definition layer on the substrate, and the other first organic spacer can be located on the pixel definition layer. In other examples, at least two first organic spacers with the same extension direction can be set in the interval between adjacent light-emitting elements emitting light of different colors. The at least two first organic spacers can be set in the second isolation groove formed by thinning the pixel definition layer. In other examples, two first organic spacers and one second organic spacer can be set in the interval between adjacent light-emitting elements emitting light of different colors. The two first organic spacers and one second organic spacer can both be set in the first isolation groove or the second isolation groove of the pixel definition layer; or one or both of the two first organic spacers and one second organic spacer can be set in the first isolation groove or the second isolation groove of the pixel definition layer. This embodiment is not limited to this.

[0158] The display substrate provided in this embodiment is configured with a first organic isolation column having a positive tapered structure for light-emitting elements using a tandem design. This structure can improve crosstalk between adjacent light-emitting elements emitting light of different colors by increasing the leakage current path between them. In some examples, the organic isolation structure is disposed within a first isolation groove formed by removing the pixel definition layer or a second isolation groove formed by thinning the pixel definition layer. This reduces the height of the organic isolation structure, making it lower than the height of the support column, thereby preventing the FMM from rubbing against the organic isolation structure and causing dark spots and poor display.

[0159] Figure 19 is another partially enlarged schematic diagram of area A1 in Figure 1. In some examples, as shown in Figure 19, the multiple light-emitting elements in the display area may include: multiple first light-emitting elements 21a emitting a first color of light, multiple second light-emitting elements 21b emitting a second color of light, and multiple third light-emitting elements 21c emitting a third color of light. For example, the first color of light may be green, the second color of light may be red, and the third color of light may be blue. This embodiment is not limited to this.

[0160] In some examples, the multiple light-emitting elements in the display area can be arranged according to the following pattern: in each row, they are arranged in a repeating unit of two first light-emitting elements 21a, one second light-emitting element 21b, and one third light-emitting element 21c, with the two first light-emitting elements 21a in the repeating unit arranged in the column direction. In light-emitting elements in different rows, the spacing in the row direction between light-emitting elements emitting the same color light is approximately 1.5 times the width of the light-emitting element. In this example, the widths of the first light-emitting elements 21a, the second light-emitting elements 21b, and the third light-emitting elements 21c along the row direction can be the same. In other words, the repeating units between two adjacent rows can be offset in the row direction by 1.5 times the width of the light-emitting elements. The orthographic projections of the light-emitting areas of the two first light-emitting elements 21a onto the substrate can both be pentagons (e.g., rounded pentagons). The two first light-emitting elements 21a can be symmetrical with each other, and the axis of symmetry can be parallel to the row direction. The orthographic projections of the light-emitting areas of the second light-emitting elements 21b and the third light-emitting elements 21c onto the substrate can both be hexagons (e.g., rounded hexagons). The lengths of the second light-emitting element 21b and the third light-emitting element 21c along the column direction can be the same. The length of the first light-emitting element 21a along the column direction can be less than the length of the second light-emitting element 21b along the column direction. In this example, the row direction can be parallel to the first direction X, and the column direction can be parallel to the second direction Y.

[0161] In some examples, as shown in FIG19 , the organic isolation structure 31 may include: a plurality of independently arranged first organic isolation columns 311a and 311c. The first organic isolation columns 311a may extend along the second direction Y, and the first organic isolation columns 311c may be generally zigzag-shaped. A first organic isolation column 311a may be disposed between adjacent first and second light-emitting elements 21a and 21b, a first organic isolation column 311a may be disposed between adjacent first and third light-emitting elements 21a and 21c, and a plurality of first organic isolation columns 311c arranged sequentially along the first direction X may be disposed between adjacent rows of light-emitting elements emitting light of different colors. An organic isolation structure may not be disposed between two first light-emitting elements 21a within a repeating unit. However, this embodiment is not limited to this. In other examples, the plurality of first organic isolation columns may be interconnected to form a mesh structure, which may surround two first light-emitting elements, a single second light-emitting element, and a single third light-emitting element within corresponding meshes.

[0162] The structure of the first organic spacer and the rest of the display region in this example can refer to the description of the previous embodiment, so they are not repeated here. The structure (or method) shown in this embodiment can be appropriately combined with the structure (or method) shown in other embodiments.

[0163] Figure 20 is another partially enlarged schematic diagram of area A1 in Figure 1. In some examples, as shown in Figure 20, the multiple light-emitting elements in the display area can be arranged in the following manner: arranged in a repeating unit of a second light-emitting element 21b, a first light-emitting element 21a and a third light-emitting element 21c on each row, and in the column direction, the light-emitting elements in each column emit light of the same color. For example, the first light-emitting element 21a can be configured to emit green light, the second light-emitting element 21b can be configured to emit red light, and the third light-emitting element 21c can be configured to emit blue light. Each light-emitting element can be roughly rectangular (e.g., a rounded rectangle). The width of the light-emitting elements emitting different colors of light along the row direction can be roughly the same, and the length of the light-emitting elements emitting different colors of light in the column direction can be roughly the same.

[0164] In some examples, as shown in FIG20 , the organic isolation structure 31 may include a plurality of independently arranged first organic spacer columns 311 a extending along the second direction Y. A first organic spacer column 311 a may be provided between adjacent columns of light-emitting elements emitting light of different colors. In this example, by providing first organic spacer columns between adjacent light-emitting elements emitting light of different colors, it is possible to prevent light-emitting elements of other colors from being illuminated during monochrome display, thereby improving the display effect.

[0165] The structure of the first organic spacer columns in this example and the remaining structure of the display area can be referred to the description of the previous embodiment, and therefore will not be repeated here. The structure (or method) shown in this embodiment can be appropriately combined with the structures (or methods) shown in other embodiments. For example, two first organic spacer columns extending in the same direction can be provided between adjacent columns of light-emitting elements emitting light of different colors.

[0166] Figure 21 is another partially enlarged schematic diagram of area A1 in Figure 1. In some examples, as shown in Figure 21, the multiple light-emitting elements in the display area can be arranged in the following manner: a third light-emitting element 21c, a second light-emitting element 21b, and a first light-emitting element 21a are arranged in sequence along the row direction as a repeating unit; in adjacent rows of light-emitting elements, the spacing in the row direction between light-emitting elements emitting light of the same color is approximately equal to twice the width of the light-emitting element. The lengths of the first light-emitting element 21a, the second light-emitting element 21b, and the third light-emitting element 21c along the row direction can be approximately the same, and the lengths along the column direction can be approximately the same. For example, the first light-emitting element 21a can be configured to emit green light, the second light-emitting element 21b can be configured to emit red light, and the third light-emitting element 21c can be configured to emit blue light.

[0167] In some examples, as shown in FIG21 , the organic isolation structure 31 may include: a plurality of independently arranged first organic isolation columns 311 a extending along the second direction Y and a plurality of first organic isolation columns 311 b extending along the first direction X. The first organic isolation columns 311 a may be located between light-emitting elements that are adjacent in the first direction X and emit light of different colors, and the first organic isolation columns 311 b may be located between light-emitting elements that are adjacent in the second direction Y and emit light of different colors. However, this embodiment is not limited to this. In other examples, a plurality of first organic isolation columns may be interconnected to form a mesh structure, and the mesh structure may surround a single first light-emitting element, a single second light-emitting element, and a single third light-emitting element in corresponding meshes, respectively.

[0168] The structure of the first organic spacer and the rest of the display region in this example can refer to the description of the previous embodiment, so they are not repeated here. The structure (or method) shown in this embodiment can be appropriately combined with the structure (or method) shown in other embodiments.

[0169] Figure 22 is another partially enlarged schematic diagram of area A1 in Figure 1. In some examples, as shown in Figure 22, the multiple light-emitting elements in the display area can be arranged in the following manner: a third light-emitting element 21c, a second light-emitting element 21b, and a first light-emitting element 21a are arranged in sequence along the row direction as a repeating unit; in adjacent rows of light-emitting elements, the spacing in the row direction between light-emitting elements emitting light of the same color is approximately equal to 1.5 times the width of the light-emitting element. The lengths of the first light-emitting element 21a, the second light-emitting element 21b, and the third light-emitting element 21c along the row direction can be approximately the same, and the lengths along the column direction can be approximately the same. For example, the first light-emitting element 21a can be configured to emit green light, the second light-emitting element 21b can be configured to emit red light, and the third light-emitting element 21c can be configured to emit blue light.

[0170] In some examples, as shown in FIG22 , the organic isolation structure 31 may include: a plurality of independently arranged first organic isolation columns 311 a extending along the second direction Y and a plurality of first organic isolation columns 311 b extending along the first direction X. The first organic isolation columns 311 a may be located between adjacent light-emitting elements emitting light of different colors along the first direction X, and the first organic isolation columns 311 b may be located between adjacent rows of light-emitting elements. However, this embodiment is not limited to this. In other examples, the plurality of first organic isolation columns may be interconnected to form a mesh structure, and the mesh structure may surround a single first light-emitting element, a single second light-emitting element, and a single third light-emitting element in corresponding meshes, respectively.

[0171] The structure of the first organic spacer and the rest of the display region in this example can refer to the description of the previous embodiment, so they are not repeated here. The structure (or method) shown in this embodiment can be appropriately combined with the structure (or method) shown in other embodiments.

[0172] Figure 23 is another partially enlarged schematic diagram of area A1 in Figure 1. In some examples, as shown in Figure 23, the multiple light-emitting elements in the display area may include: multiple first light-emitting elements 21a and 21d emitting a first color of light, multiple second light-emitting elements 21b emitting a second color of light, and multiple third light-emitting elements 21c emitting a third color of light. For example, the first color of light may be green, the second color of light may be red, and the third color of light may be blue. This embodiment is not limited to this.

[0173] In some examples, the plurality of light-emitting elements in the display area can be arranged according to the following pattern: the plurality of first light-emitting elements 21a and 21d are arranged alternately along the row direction and the column direction, the plurality of second light-emitting elements 21b and the plurality of third light-emitting elements 21c are arranged alternately along the row direction and the column direction, the rows where the first light-emitting elements 21a and 21d are located are alternately arranged with the rows where the second light-emitting elements 21b and the third light-emitting elements 21c are located, and the columns where the first light-emitting elements 21a and 21d are located are alternately arranged with the columns where the second light-emitting elements 21b and the third light-emitting elements 21c are located. For example, the first light-emitting elements 21a and the second light-emitting elements 21b can be arranged along a straight line with a counterclockwise (or clockwise) angle of 45 degrees to the horizontal line, and the first light-emitting elements 21a and the third light-emitting elements 21c can be arranged along a straight line with a clockwise (or counterclockwise) angle of 45 degrees to the horizontal line.

[0174] In some examples, as shown in FIG23 , the organic isolation structure may include: a plurality of first groups of organic spacer columns and a plurality of second groups of organic spacer columns. The first group of organic spacer columns may include: four independently arranged first organic spacer columns 311 g, 311 h, 311 i, and 311 j. The first group of organic spacer columns may be arranged around the second light-emitting element 21 b, separating the second light-emitting element 21 b from the adjacent first light-emitting elements 21 a and 21 b and the third light-emitting element 21. The second group of organic spacer columns may include two independently arranged first organic spacer columns 311 m and 311 n. The two first organic spacer columns 311 m and 311 n may be located on either side of the first light-emitting element 21 a or 21 d, separating the first light-emitting element 21 a or 21 d from the adjacent third light-emitting element 21 c. However, this embodiment is not limited to this. For example, two adjacent organic spacer columns in the first group of organic spacer columns may be connected to each other.

[0175] The structure of the first organic isolation column in this example and the rest of the structure of the display area can refer to the description of the aforementioned embodiment, so they will not be repeated here. The structure (or method) shown in this embodiment can be appropriately combined with the structure (or method) shown in other embodiments. Figure 24 is another partially enlarged schematic diagram of area A1 in Figure 1. In some examples, as shown in Figure 24, the organic isolation structure 31 can be roughly a grid structure, which has a plurality of grids, and at least one grid can be diamond-shaped. At least one grid can surround the light-emitting area of ​​a first light-emitting element 21a, or surround the light-emitting area of ​​a first light-emitting element 21d, or surround the light-emitting area of ​​a second light-emitting element 21b, or surround the light-emitting area of ​​a third light-emitting element 21c.

[0176] The organic isolation structure and the rest of the display area structure in this example can refer to the description of the previous embodiment, so they are not repeated here. The structure (or method) shown in this embodiment can be appropriately combined with the structure (or method) shown in other embodiments.

[0177] This embodiment also provides a method for preparing a display substrate, comprising: providing a substrate; forming an organic isolation structure and a plurality of light-emitting elements on the substrate. The organic isolation structure comprises: a plurality of first organic spacers, at least one of the plurality of first organic spacers being located between the light-emitting regions of at least two adjacent light-emitting elements emitting light of different colors; at least one first organic spacer comprising: a stacked first isolation layer and a second isolation layer, the second isolation layer being located on a side of the first isolation layer away from the substrate, the orthographic projection of the first isolation layer on the substrate overlapping the orthographic projection of the second isolation layer on the substrate; the first isolation layer comprising: a first bottom surface and a first top surface, the first bottom surface being located on a side of the first top surface closer to the substrate; the second isolation layer comprising: a second bottom surface and a second top surface, the second bottom surface being located on a side of the second top surface closer to the substrate, the second bottom surface contacting the first top surface; the orthographic projection of the first bottom surface on the substrate including the orthographic projection of the first top surface on the substrate, the orthographic projection of the first top surface on the substrate overlapping the orthographic projection of the second bottom surface on the substrate, and the orthographic projection of the second bottom surface on the substrate including the orthographic projection of the second top surface on the substrate.

[0178] In some example embodiments, forming the organic isolation structure on the substrate may include: forming a first organic spacer using a half-tone mask, wherein a first isolation layer and a second isolation layer of the first organic spacer are an integrated structure connected to each other.

[0179] In some example embodiments, forming the organic isolation structure on the substrate may include: forming a first isolation layer of the first organic spacer using a first mask, and forming a second isolation layer of the first organic spacer using a second mask.

[0180] The method for preparing the display substrate of this example can be referred to the description of the aforementioned embodiment, and thus will not be described in detail here.

[0181] FIG25 is a schematic diagram of a display device according to at least one embodiment of the present disclosure. As shown in FIG25 , this embodiment provides a display device 91 comprising a display substrate 910 according to the aforementioned embodiment. In some examples, the display substrate 910 may be a flexible OLED display substrate, a QLED display substrate, a Micro-LED display substrate, or a Mini-LED display substrate. The display device 91 may be a product having an image (including a static image or a dynamic image, wherein the dynamic image may be a video) display function. For example, the display device may be any of the following products: a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a picture screen, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, an information query device (such as a business query device for e-government, a bank, a hospital, a power department, etc.), a monitor, etc. For another example, the display device may also be a microdisplay, a VR device or an AR device containing a microdisplay, etc.

[0182] The drawings in this disclosure only relate to the structures involved in this disclosure, and other structures can refer to the general design. In the absence of conflict, the embodiments of the present disclosure, that is, the features in the embodiments, can be combined with each other to obtain new embodiments. It should be noted that the above-mentioned embodiments or implementation methods are merely exemplary and not restrictive. Therefore, the present disclosure is not limited to the contents shown and described in detail herein. Various modifications, replacements or omissions can be made to the form and details of the implementation without departing from the scope of this disclosure.

Claims

1. A display substrate, comprising: A substrate, an organic isolation structure disposed on the substrate, and a plurality of light-emitting elements; The organic isolation structure includes: a plurality of first organic spacer columns, at least one of the plurality of first organic spacer columns being located between light-emitting regions of at least two adjacent light-emitting elements emitting light of different colors; The at least one first organic spacer comprises: a first spacer layer and a second spacer layer stacked together, wherein the second spacer layer is located on a side of the first spacer layer away from the substrate, and an orthographic projection of the first spacer layer on the substrate covers an orthographic projection of the second spacer layer on the substrate; The first isolation layer includes: a first bottom surface and a first top surface, wherein the first bottom surface is located on a side of the first top surface close to the substrate; the second isolation layer includes: a second bottom surface and a second top surface, wherein the second bottom surface is located on a side of the second top surface close to the substrate, and the second bottom surface is in contact with the first top surface; The orthographic projection of the first bottom surface on the substrate includes the orthographic projection of the first top surface on the substrate, the orthographic projection of the first top surface on the substrate covers the orthographic projection of the second bottom surface on the substrate, and the orthographic projection of the second bottom surface on the substrate includes the orthographic projection of the second top surface on the substrate.

2. The display substrate according to claim 1, wherein The light-emitting element includes: a light-emitting functional layer, which includes at least: two light-emitting layers and at least one charge generation layer located between the two light-emitting layers; the light-emitting functional layer is located on the side of the organic isolation structure away from the substrate, and the orthographic projection of the light-emitting functional layer on the substrate at least partially overlaps with the orthographic projection of the organic isolation structure on the substrate.

3. The display substrate according to claim 2, wherein: The orthographic projection of the at least one charge generation layer on the substrate covers the orthographic projections of the plurality of light-emitting elements on the substrate.

4. The display substrate according to claim 3, wherein: The at least one charge generation layer includes: a first portion located in the light emitting region of the light emitting element, and a second portion overlapping the organic isolation structure; a thickness of the first portion is greater than a thickness of the second portion.

5. The display substrate according to claim 2, wherein: The light-emitting functional layer includes: a first hole transport layer, a first light-emitting layer, a first hole blocking layer, a first charge generating layer, a second charge generating layer, a second hole transport layer, a second light-emitting layer, a second hole blocking layer and an electron transport layer stacked in sequence. The display substrate according to claim 1 , wherein: The first isolation layer and the second isolation layer of the at least one first organic isolation column are an integral structure connected to each other.

7. The display substrate according to any one of claims 1 to 6, wherein: The thickness of the first isolation layer ranges from 0.2 micrometers to 1.1 micrometers, and the thickness of the second isolation layer ranges from 1.2 micrometers to 1.6 micrometers.

8. The display substrate according to claim 1, wherein: At least two adjacent first organic isolation columns extending in the same direction are arranged at intervals between the light emitting regions of the at least two adjacent light emitting elements emitting light of different colors.

9. The display substrate according to claim 8, wherein: The organic isolation structure further includes: at least one second organic isolation column, wherein the second organic isolation column is located between two adjacent first organic isolation columns extending in the same direction; The second organic spacer includes a third bottom surface and a third top surface. The third bottom surface is located on a side of the third top surface close to the substrate. The orthographic projection of the third top surface on the substrate includes the orthographic projection of the third bottom surface on the substrate.

10. The display substrate according to claim 9, wherein: The thickness of the second organic spacer is less than or equal to the thickness of the first organic spacer.

11. The display substrate according to claim 9, wherein: The material of the second organic spacer is different from that of the first organic spacer.

12. The display substrate according to claim 1, wherein The light-emitting element comprises: a stacked first electrode, a light-emitting functional layer, and a second electrode, wherein the first electrode is located on a side of the second electrode close to the substrate; The display substrate further comprises: a pixel definition layer located on a side of the first electrode of the light-emitting element away from the substrate, the pixel definition layer being provided with a pixel opening, the light-emitting functional layer being in contact with the first electrode through the pixel opening; the organic isolation structure being located on a side of the pixel definition layer away from the substrate; The orthographic projection of the pixel definition layer on the substrate covers the orthographic projection of the organic isolation structure on the substrate.

13. The display substrate according to claim 1, wherein: The light-emitting element comprises: a stacked first electrode, a light-emitting functional layer, and a second electrode, wherein the first electrode is located on a side of the second electrode close to the substrate; The display substrate further comprises: a pixel definition layer located on a side of the first electrode of the light-emitting element away from the substrate, the pixel definition layer being provided with a pixel opening, and the light-emitting functional layer being in contact with the first electrode through the pixel opening; The orthographic projection of the pixel definition layer on the substrate does not overlap with the orthographic projection of the organic isolation structure on the substrate, or the orthographic projection of the pixel definition layer on the substrate partially overlaps with the orthographic projection of the organic isolation structure on the substrate.

14. The display substrate according to claim 13, wherein: The pixel definition layer is provided with at least one first isolation groove, and the at least one first organic isolation column of the organic isolation structure is arranged in the at least one first isolation groove; the orthographic projection of the first isolation groove on the substrate does not overlap with the orthographic projection of the first electrode of the light-emitting element on the substrate.

15. The display substrate according to claim 1, further comprising: a plurality of support columns, at least one of the plurality of support columns being located between light-emitting regions of two adjacent light-emitting elements emitting light of the same color; The maximum height of the first organic spacer column is less than or equal to the minimum height of the support column.

16. The display substrate according to claim 1, wherein The plurality of light-emitting elements include: a plurality of first light-emitting elements emitting a first color light, a plurality of second light-emitting elements emitting a second color light, and a plurality of third light-emitting elements emitting a third color light; the plurality of first light-emitting elements and the plurality of second light-emitting elements are arranged in a row along a first direction, the plurality of third light-emitting elements are arranged in a row along the first direction, and the row of light-emitting elements including the first light-emitting elements and the second light-emitting elements and the row of third light-emitting elements are arranged in a second direction, and the first direction intersects the second direction; The organic isolation structure includes: a plurality of first organic isolation columns extending along the first direction and a plurality of first organic isolation columns extending along the second direction; at least one first organic isolation column extending along the second direction is provided in the interval between adjacent first and second light-emitting elements; and at least one first organic isolation column extending along the first direction is provided in the interval between adjacent third light-emitting elements and the first and second light-emitting elements.

17. A display device comprising the display substrate according to any one of claims 1 to 16.

18. A method for preparing a display substrate, comprising: providing a substrate; An organic isolation structure and a plurality of light-emitting elements are formed on the substrate; wherein the organic isolation structure comprises: a plurality of first organic isolation columns, at least one of the plurality of first organic isolation columns being located between light-emitting regions of at least two adjacent light-emitting elements emitting light of different colors; the at least one first organic isolation column comprising: a stacked first isolation layer and a second isolation layer, the second isolation layer being located on a side of the first isolation layer away from the substrate, the orthographic projection of the first isolation layer on the substrate covering the orthographic projection of the second isolation layer on the substrate; the first isolation layer comprising: a first bottom surface and a first top surface, the first bottom surface being located on a side of the first top surface close to the substrate; the second isolation layer comprising: a second bottom surface and a second top surface, the second bottom surface being located on a side of the second top surface close to the substrate, and the second bottom surface being in contact with the first top surface; the orthographic projection of the first bottom surface on the substrate includes the orthographic projection of the first top surface on the substrate, the orthographic projection of the first top surface on the substrate covers the orthographic projection of the second bottom surface on the substrate, and the orthographic projection of the second bottom surface on the substrate includes the orthographic projection of the second top surface on the substrate 19. The preparation method according to claim 18, wherein Forming the organic isolation structure on the substrate includes: forming the first organic isolation column by using a half-tone mask, wherein the first isolation layer and the second isolation layer of the first organic isolation column are an integrated structure connected to each other.

20. The preparation method according to claim 18, wherein Forming the organic isolation structure on the substrate includes: forming a first isolation layer of the first organic isolation column using a first mask, and forming a second isolation layer of the first organic isolation column using a second mask.

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