Display panel, preparation method of display panel and display device

Abstract

The embodiment of the invention discloses a display panel, a preparation method of the display panel and a display device. The display panel includes a driving substrate, a pixel defining structure, and a plurality of light emitting structures. The pixel limiting structure is located on one side of the driving substrate. The pixel defining structure includes a plurality of pixel opening segments and a plurality of pixel defining segments. The light-emitting structure is located on the side, away from the driving substrate, of the pixel limiting structure and at least covers the pixel opening subsections. The insulating structures are located on the sides, away from the driving substrate, of the pixel limiting subsections and located between every two adjacent light-emitting structures. The insulating structure at least penetrates through part of the light-emitting layer in the thickness direction of the display panel. In this way, transverse leakage current between every two adjacent light-emitting structures is blocked through the insulating structures penetrating through at least part of the light-emitting layers, and therefore the phenomenon of secret lighting of the display panel is improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel, a method for preparing a display panel, and a display device. Background Art

[0002] With the rapid growth of the display industry in recent years, the visual effects of display panels have become increasingly demanding. However, some organic layers with high conductivity in current display panels can easily lead to serious lateral leakage between the light-emitting elements of the display panel, causing the light-emitting elements to appear to be bright, affecting the display effect of the display panel. Summary of the invention

[0003] The present invention provides a display panel, a method for preparing the display panel and a display device, which improve the light stealing phenomenon of the display panel by blocking the lateral leakage between two adjacent light emitting structures through an insulating structure penetrating at least a part of the light emitting layer.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0005] Driver substrate;

[0006] A pixel defining structure, located on one side of the driving substrate; the pixel defining structure comprises a plurality of pixel opening sub-divisions and a plurality of pixel defining sub-divisions;

[0007] A plurality of light-emitting structures are located on a side of the pixel definition structure away from the driving substrate and at least cover the pixel opening portion; the light-emitting structure includes a light-emitting layer;

[0008] The insulating structure is located on a side of the pixel defining portion away from the driving substrate and between two adjacent light emitting structures; along the thickness direction of the display panel, the insulating structure at least penetrates a portion of the light emitting layer.

[0009] In a second aspect, an embodiment of the present invention further provides a method for preparing a display panel, which is used to prepare the display panel of any embodiment of the first aspect of the present invention.

[0010] In a third aspect, an embodiment of the present invention further provides a display device, comprising a display panel according to any embodiment of the first aspect of the present invention.

[0011] The display panel provided by the embodiment of the present invention is provided with an insulating structure in the light-emitting layer between two adjacent light-emitting structures, the insulating structure is located on the side of the pixel defining portion away from the driving substrate and along the thickness direction of the display panel, and the insulating structure penetrates at least part of the light-emitting layer. In this way, when a lateral leakage current occurs between the light-emitting layers of two adjacent light-emitting structures, the lateral leakage current can be blocked by the insulating structure to prevent the lateral leakage current from being transmitted between the light-emitting layers of the two adjacent light-emitting structures, thereby improving the light-stealing phenomenon of the display panel and enhancing the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0013] Figure 2 yes Figure 1 A schematic cross-sectional view along the A-A' direction;

[0014] Figure 3 yes Figure 1 Another schematic cross-sectional view along the A-A' direction;

[0015] Figure 4 yes Figure 1 Another schematic cross-sectional view along the A-A' direction;

[0016] Figure 5 yes Figure 1 Another cross-sectional schematic diagram along the A-A' direction;

[0017] Figure 6 yes Figure 1 Another cross-sectional schematic diagram along the A-A' direction;

[0018] Figure 7 yes Figure 1 Another cross-sectional schematic diagram along the A-A' direction;

[0019] Figure 8 is a structural schematic diagram of a light-emitting structure provided by an embodiment of the present invention;

[0020] Fig. 9 is a flow chart of a method for preparing a display panel provided by an embodiment of the present invention;

[0021] Fig.10 is a flow chart of another method for preparing a display panel provided by an embodiment of the present invention;

[0022] Fig.11 is a flow chart of another method for preparing a display panel provided by an embodiment of the present invention;

[0023] Fig.12is a flow chart of another method for preparing a display panel provided by an embodiment of the present invention;

[0024] Fig.13 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be fully described below in combination with the drawings in the embodiments of the present invention through specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work fall within the protection scope of the present invention.

[0026] Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention, Figure 2 yes Figure 1 A schematic cross-sectional view along the A-A' direction. Figure 1 and Figure 2 The display panel includes a driving substrate 10, a pixel defining structure 20, a light emitting structure 30 and an insulating structure 40. The pixel defining structure 20 is located on one side of the driving substrate 10. The pixel defining structure 20 includes a plurality of pixel opening subdivisions 210 and a plurality of pixel defining subdivisions 220. The light emitting structure 30 is located on a side of the pixel defining structure 20 away from the driving substrate 10 and at least covers the pixel opening subdivision 210. The light emitting structure 30 includes a light emitting layer 310. The insulating structure 40 is located on a side of the pixel defining subdivision 220 away from the driving substrate 10 and between two adjacent light emitting structures 30. Along the thickness direction of the display panel, the insulating structure 40 at least penetrates a portion of the light emitting layer 310.

[0027] Specifically, Figure 1 and Figure 2As shown, the display panel includes a driving substrate 10 and an anode layer 110 and a pixel defining structure 20 located on one side of the driving substrate 10. A thin film transistor T is provided in the driving substrate 10, and the anode layer 110 is located on the side of the pixel defining structure 20 close to the driving substrate 10. The thin film transistor T is electrically connected to the anode layer 110, and then a driving signal is provided to the anode layer 110 through the thin film transistor T. The pixel defining structure 20 includes a pixel opening subdivision 210 and a pixel defining subdivision 220. The pixel opening subdivision 210 runs through the pixel defining structure 20, and the pixel defining subdivision 220 surrounds at least part of the pixel opening subdivision 210. Along the thickness direction of the display panel, the pixel opening subdivision 210 at least partially overlaps with the anode layer 110, so that the pixel opening subdivision 210 exposes at least part of the anode layer 110, and then the anode layer 110 can contact the light emitting structure 30 located in the pixel opening subdivision 210. Exemplarily, the light emitting structure 30 includes a light emitting layer 310 and a cathode layer 320. Among them, the light-emitting layer 310 is located on the side of the cathode layer 320 close to the anode layer 110, that is, the light-emitting layer 310 is in contact with both the anode layer 110 and the cathode layer 320. When no voltage is applied to the anode layer 110 and the cathode layer 320, the light-emitting structure 30 does not emit light. When voltage is applied to the anode layer 110 and the cathode layer 320, the anode layer 110 injects holes into the light-emitting layer 310, and the cathode layer 320 injects electrons into the light-emitting layer 320. The holes and electrons recombine in the light-emitting layer 310 to form photoexcitons, which radiate light.

[0028] In addition, the display panel includes a plurality of light emitting structures 30 of different colors, and the plurality of light emitting structures 30 of different colors are arranged in an array. Since the excitation materials of the light emitting layers 320 in the light emitting structures 30 of different colors are different, the light emitting efficiencies of the light emitting structures 30 of different colors are different. For example, Figure 1 and Figure 2 In the illustrated embodiment, the light emitting structure 30 may include a red light emitting structure 301, a blue light emitting structure 302, and a green light emitting structure 303. The light emitting efficiency of the red light emitting structure 301 is greater than that of the blue light emitting structure 302, and the light emitting efficiency of the blue light emitting structure 302 is greater than that of the green light emitting structure 303. Since the lateral leakage current will flow to the light emitting structure 30 with higher light emitting efficiency, among the adjacent red light emitting structure 301, blue light emitting structure 302, and green light emitting structure 303, when the green light emitting structure 303 is lit, a lateral leakage current will flow to the blue light emitting structure 302 or the red light emitting structure 301, causing the blue light emitting structure 302 or the red light emitting structure 301 to be bright, thereby affecting the display effect of the display panel.

[0029] To this end, the embodiment of the present invention sets an insulating structure 40 on the side of the pixel defining subdivision 220 away from the driving substrate 10, and the insulating structure 40 is located in the light-emitting layer 310 between two adjacent light-emitting structures 30. Exemplarily, when the light-emitting layer includes a double-layer light-emitting layer (two light-emitting layers and a charge generation layer located between the two light-emitting layers), since the conductivity of the charge generation layer in the light-emitting structure is relatively large, it is necessary to set the insulating structure 40 between any two adjacent light-emitting structures 30, that is, the insulating structure 40 is set between the red light-emitting structure 301 and the blue light-emitting structure 302, between the red light-emitting structure 301 and the green light-emitting structure 303, and between the blue light-emitting structure 302 and the green light-emitting structure 303. When the light-emitting layer includes a light-emitting layer, the insulating structure 40 can be located between two light-emitting structures 30 with different light-emitting efficiencies. For example, if the light-emitting efficiency of the red light-emitting structure 301 is similar to that of the blue light-emitting structure 302, and the light-emitting efficiency of the green light-emitting structure 303 is less than that of the red light-emitting structure 301, then the insulating structure can be set only between the red light-emitting structure 301 and the green light-emitting structure 303 and between the blue light-emitting structure 302. The present invention is not limited here, and those skilled in the art can set it as needed. Since the lateral leakage current is usually transmitted in the light-emitting layer 310 of two adjacent light-emitting structures 30, and then along the thickness direction of the display panel, the insulating structure 40 is set to penetrate at least part of the light-emitting layer 310 to block the lateral leakage current through the insulating structure 40, thereby avoiding the lateral leakage current from being transmitted in the light-emitting layer 310 of two adjacent light-emitting structures 30, improving the stealing brightness phenomenon of the display panel, and improving the display effect of the display panel.

[0030] It should be noted that Figure 1 The insulating structure 40 is mainly described as being located between any two adjacent light-emitting structures 30, without limiting the light-emitting efficiency of different light-emitting structures 30, that is, Figure 1 The luminous efficiencies of different light emitting structures 30 may be different or the same.

[0031] In summary, the embodiment of the present invention sets an insulating structure on the side of the pixel defining portion away from the driving substrate. Since the lateral leakage current is usually transmitted in the light-emitting layer, the insulating structure is set in the light-emitting layer between two adjacent light-emitting structures, and along the thickness direction of the display panel, the insulating structure penetrates at least part of the light-emitting layer. In this way, the lateral leakage current between the two adjacent light-emitting structures is blocked by the insulating structure, and the lateral leakage current is prevented from being transmitted in the light-emitting layer of the two adjacent light-emitting structures 30, thereby improving the stealing brightness phenomenon of the display panel and enhancing the display effect of the display panel.

[0032] Based on the above embodiments, continue to refer to Figure 2The light emitting structure 30 further includes a cathode layer 320, which is located on a side of the light emitting layer 310 away from the driving substrate 10. The cathode layer 320 includes a first cathode surface S1 on a side away from the driving substrate 10, and the insulating structure 40 includes a first insulating surface S2 on a side away from the driving substrate 10. The first cathode surface S1 includes a first surface section S11, and along the thickness direction of the display panel, the first surface section S11 overlaps with the insulating structure 40. The light emitting layer 310 includes a charge generating layer 311. The insulating structure 40 penetrates the charge generating layer 311, and the first insulating surface S2 is located on a side of the first surface section S11 close to the driving substrate 10.

[0033] Specifically, Figure 2 In the embodiment shown, the light-emitting layer 310 includes two light-emitting layers. The light-emitting layer 310 further includes a charge generation layer 311 located between the two light-emitting layers. The charge generation layer 311 is used to generate holes and electrons. The charge generation layer 311 has a high conductivity and is prone to lateral leakage. Therefore, an insulating structure 40 is provided in the charge generation layer 311 between two adjacent light-emitting structures 30, and the insulating structure 40 penetrates the charge generation layer 311 along the thickness direction of the display panel, thereby blocking the lateral leakage from transmitting in the charge generation layer 311 between adjacent light-emitting structures 30 through the insulating structure 40, improving the light stealing phenomenon of the display panel and enhancing the display effect of the display panel. In addition, in the process of providing the insulating structure 40, if the insulating structure 40 completely penetrates the cathode layer 320, the cathode layer 320 will be discontinuous. On the one hand, the discontinuous cathode layer 320 will increase the resistance of the cathode layer 320 of each light-emitting structure 30, thereby increasing the power consumption of the light-emitting structure 30. On the other hand, the discontinuous cathode layer will cause the tip effect of the electric field to be generated at the tip position of the partition, that is, the electric field strength near the tip position will suddenly increase. Since the edge position of the light-emitting structure 30 is located at the tip position near the partition, the tip effect will cause the edge position of the light-emitting structure 30 to light up in advance, affecting the display effect of the light-emitting structure 30. For this reason, the embodiment of the present invention further provides that the insulating structure 40 includes a first insulating surface S2 away from the side of the driving substrate 10, the cathode layer 320 includes a first cathode surface S1 away from the side of the driving substrate 10, and the first cathode surface S1 includes a first surface section S11 overlapping with the insulating structure 40 along the thickness direction of the display panel. On this basis, by setting the first insulating surface S2 to be located on the side of the first surface section S11 close to the driving substrate 10, that is, the surface of the insulating structure 40 away from the driving substrate 10 is located below the surface of the cathode layer 320 away from the driving substrate 10, so that the insulating structure 40 does not completely penetrate the cathode layer 320, thereby ensuring the continuity of the cathode layer 320, and on the basis of blocking the lateral leakage, avoiding the influence of the tip effect caused by the break of the cathode layer 320, thereby improving the display effect of the display panel.

[0034] It should be noted that the first insulating surface S2 is located on the side of the first surface portion S11 close to the driving substrate 10. The insulating structure 40 may only penetrate part of the cathode layer 320, or the insulating structure 40 may not be provided in the cathode layer 320. The present invention is not limited to this, and those skilled in the art may set it as needed.

[0035] Optionally, based on the above embodiment, Figure 3 yes Figure 1 Another cross-sectional diagram along the A-A' direction is shown in FIG. Figure 3 The cathode layer 320 includes a first cathode layer 321 and a second cathode layer 322. The first cathode layer 321 is located on a side of the second cathode layer 322 close to the driving substrate 10. The insulating structure 40 penetrates the first cathode layer 321 along the thickness direction of the display panel.

[0036] For example, Figure 3 In the illustrated embodiment, the cathode layer 320 includes a first cathode layer 321 and a second cathode layer 322 which are stacked. It is understandable that the first cathode layer 321 and the second cathode layer 322 are made of the same material, but the first cathode layer 321 and the second cathode layer 322 are not prepared in the same process flow. Specifically, the first cathode layer 321 is located on the side of the second cathode layer 322 close to the drive substrate 10, and the first cathode layer 321 is prepared first during preparation. After the first cathode layer 321 is prepared, an insulating structure 40 is provided so that the insulating structure 40 passes through the charge generating layer 311 and the first cathode layer 321, and then the second cathode layer 322 is prepared on the side of the first cathode layer 321 away from the drive substrate 10. In this way, on the basis of blocking the lateral leakage current transmission between adjacent light-emitting structures 30 through the insulating structure 40, since the insulating structure 40 only penetrates the first cathode layer 321, the second cathode layer 322 is still continuous as a whole layer, and the first cathode layer 321 and the second cathode layer 322 are in contact and electrically connected. Therefore, the cathode layer 320 is guaranteed to be continuous. On the basis of blocking the lateral leakage current, the influence of the tip effect caused by the break of the cathode layer 320 is avoided, thereby improving the display effect of the display panel.

[0037] Optional, Figure 4 yes Figure 1 Another cross-sectional view along the A-A' direction. Figure 4 The light-emitting layer 310 further includes a first light-emitting layer 312 and a second light-emitting layer 313. The first light-emitting layer 312 is located on a side of the charge generation layer 311 close to the drive substrate 10, and the second light-emitting layer 313 is located on a side of the charge generation layer 311 close to the cathode layer 320. Along the thickness direction of the display panel, the insulating structure 40 penetrates the first light-emitting layer 312, the charge generation layer 311, the second light-emitting layer 313 and the first cathode layer 321.

[0038] Specifically, Figure 4 In the illustrated embodiment, the light-emitting layer 310 includes a first light-emitting layer 312, a second light-emitting layer 313, and a charge generation layer 311 located between the first light-emitting layer 312 and the second light-emitting layer 313. The light-emitting colors of the first light-emitting layer 312 and the second light-emitting layer 313 in the same light-emitting structure 30 are the same. In addition, the charge generation layer 311 is used to generate holes and electrons, and transmit them in opposite directions, respectively, so that the first light-emitting layer 312 and the second light-emitting layer 313 emit light. Exemplarily, the first light-emitting layer 312 is located on the side of the charge generation layer 311 close to the driving substrate 10, and the anode layer 110 is located on the side of the driving substrate 10 close to the light-emitting layer 310, that is, the first light-emitting layer 312 is located between the charge generation layer 311 and the anode layer 110. The second light-emitting layer 313 is located on the side of the charge generation layer 311 close to the cathode layer 320, that is, the second light-emitting layer 313 is located between the charge generation layer 311 and the cathode layer 320. The charge generation layer 311 injects electrons into the first light-emitting layer 312 (the electrons generated by the charge generation layer 311 move toward the direction close to the first light-emitting layer 312), and the anode layer 110 injects holes into the first light-emitting layer 312. The holes and electrons are combined to form photoexcitons in the first light-emitting layer 312, and emit light by radiation. At the same time, the charge generation layer 311 also injects holes into the second light-emitting layer 313 (the holes generated by the charge generation layer 311 move toward the direction close to the second light-emitting layer 313), and the cathode layer 320 injects electrons into the second light-emitting layer 313. The holes and electrons are combined to form photoexcitons in the second light-emitting layer 313, and emit light by radiation. In this way, the display effect of the display panel is improved by emitting light together by the first light-emitting layer 312 and the second light-emitting layer 313. On the basis of the above-mentioned embodiment, the first light-emitting layer 312 and the second light-emitting layer 313 both have a common film layer and have a high conductivity, and thus there is also lateral leakage transmission between the first light-emitting layer 312 and the second light-emitting layer 313. Therefore, in the embodiment of the present invention, an insulating structure 40 is set to penetrate the first light-emitting layer 312, the charge generation layer 311 and the second light-emitting layer 313 along the thickness direction of the display panel, and the lateral leakage transmission in the charge generation layer 311, the first light-emitting layer 312 or the second light-emitting layer 313 of the adjacent light-emitting structure 30 is blocked by the insulating structure 40, thereby improving the stealing light phenomenon of the display panel. In addition, on the basis of blocking the lateral leakage by the insulating structure 40, the insulating structure 40 is also set to penetrate the first cathode layer 321, thereby ensuring that the cathode layer 320 composed of the first cathode layer 321 and the second cathode layer 322 is continuous, avoiding the influence of the tip effect caused by the break of the cathode layer 320, and improving the display effect of the display panel.

[0039] Optionally, based on the above embodiment, continue to refer to Figure 4, the two adjacent light emitting structures 30 include a first light emitting structure 30A and a second light emitting structure 30B, and the first light emitting structure 30A and the second light emitting structure 30B have different light emitting colors. The minimum distance between the orthographic projection of the pixel opening sub-section 210 corresponding to the first light emitting structure 30A on the driving substrate 10 and the orthographic projection of the insulating structure 40 disposed adjacent thereto on the driving substrate 10 is L1, and the minimum distance between the orthographic projection of the pixel opening sub-section 210 corresponding to the second light emitting structure 30B on the driving substrate 10 and the orthographic projection of the insulating structure 40 disposed adjacent thereto on the driving substrate 10 is L2, wherein |L1-L2| / L1≤20%.

[0040] For example, Figure 4 In the illustrated embodiment, the insulating structure 40 penetrates a portion of the cathode layer 320, that is, penetrates the first cathode layer 321. At this time, the cathode layer 320 composed of the first cathode layer 321 and the second cathode layer 322 has an insulating opening at the position of the first cathode layer 321. If the insulating opening is located close to the first light-emitting structure 30A, the cathode layer 320 of the first light-emitting structure 30A will be missing compared to the cathode layer 320 of the second light-emitting structure 30B, that is, there is a difference between the cathode resistance of the first light-emitting structure 30A and the cathode resistance of the second light-emitting structure 30B, thereby affecting the light uniformity of the first light-emitting structure 30A and the second light-emitting structure 30B. For this reason, the embodiment of the present invention sets a minimum distance L1 between the orthographic projection of the pixel opening portion 210 corresponding to the first light-emitting structure 30A on the driving substrate 10 and the orthographic projection of the insulating structure 40 arranged adjacent thereto on the driving substrate 10, which is The minimum distance L2 between the orthographic projection of the pixel opening portion 210 corresponding to the second light-emitting structure 30B on the driving substrate 10 and the orthographic projection of the insulating structure 40 arranged adjacent thereto on the driving substrate 10 satisfies |L1-L2| / L1≤20%, so that the distance between the first light-emitting structure 30A and the insulating structure 40 is approximately equal to the distance between the second light-emitting structure 30B and the insulating structure 40. In other words, the insulating structure 40 is located in the middle position between the adjacent first light-emitting structure 30A and the second light-emitting structure 30B, so as to avoid the insulating structure 40 penetrating part of the cathode layer 320 and affecting the cathode resistance of the light-emitting structure 30.

[0041] Optional, Figure 5 yes Figure 1 Another cross-sectional schematic diagram along the A-A' direction. Figure 5The light-emitting layer 310 further includes a first light-emitting layer 312 and a second light-emitting layer 313. The first light-emitting layer 312 is located on the side of the charge generation layer 311 close to the drive substrate 10, and the second light-emitting layer 313 is located on the side of the charge generation layer 311 close to the cathode layer 320. The insulating structure 40 further includes a second insulating surface S3 close to the drive substrate. The first insulating surface S2 is located at the junction of the second light-emitting layer 313 and the charge generation layer 311, or is located in the second light-emitting layer 313. The second insulating surface S3 is located at the junction of the first light-emitting layer 312 and the charge generation layer 311, or is located in the first light-emitting layer 312.

[0042] Specifically, the first insulating surface S2 is the upper surface of the insulating structure 40, and the first insulating surface S2 is located at the boundary between the second light-emitting layer 313 and the charge generation layer 311, or located in the second light-emitting layer 313. It can be understood that the upper surface of the insulating structure 40 at most penetrates part of the second light-emitting layer 313, and at least penetrates the charge generation layer 311. The second insulating surface S3 is the lower surface of the insulating structure 40, and the second insulating surface S3 is located at the boundary between the first light-emitting layer 312 and the charge generation layer 311, or located in the first light-emitting layer 312. It can be understood that the lower surface of the insulating structure 40 at most penetrates part of the first light-emitting layer 312, and at least penetrates the charge generation layer 311. In this way, the insulating structure 40 can completely penetrate the charge generation layer 311, so that the insulating structure 40 can completely block the transmission of the lateral leakage current in the charge generation layer 311, avoid the transmission of the lateral leakage current in the charge generation layer 311 between two adjacent light-emitting structures 30, improve the stealing brightness phenomenon of the display panel, and enhance the display effect of the display panel.

[0043] It is understandable that if Figure 5 In the illustrated embodiment, since the first insulating surface S2 at most penetrates a portion of the second light-emitting layer 313 and the insulating structure 40 does not contact the cathode layer 320, the cathode layer 320 itself is continuous, thereby avoiding the influence of the tip effect caused by the break of the cathode layer 320 and improving the display effect of the display panel.

[0044] Optional, Figure 6 yes Figure 1 Another cross-sectional schematic diagram along the A-A' direction. Figure 6 The light-emitting layer 310 further includes a first light-emitting layer 312 and a second light-emitting layer 313. The first light-emitting layer 312 is located on a side of the charge generation layer 311 close to the drive substrate 10, and the second light-emitting layer 313 is located on a side of the charge generation layer 311 close to the cathode layer 320. The insulating structure 40 penetrates the first light-emitting layer 312, the charge generation layer 311 and the second light-emitting layer 313.

[0045] For example, Figure 6In the illustrated embodiment, the insulating structure 40 may penetrate the first light-emitting layer 312, the charge generation layer 311, and the second light-emitting layer 313. Specifically, during preparation, the first light-emitting layer 312, the charge generation layer 311, and the second light-emitting layer 313 may be prepared on the side of the pixel defining structure 20 away from the driving substrate 10. After these organic layers are prepared, a laser drilling process is used to form insulating openings in the first light-emitting layer 312, the charge generation layer 311, and the second light-emitting layer 313, and insulating materials are filled in the insulating openings to form the insulating structure 40, so that the formed insulating structure 40 penetrates the first light-emitting layer 312, the charge generation layer 311, and the second light-emitting layer 313. In this way, on the one hand, the provision of the insulating structure 40 can prevent the lateral leakage current between adjacent light-emitting structures 30 from being transmitted in the film layer with higher conductivity (the first light-emitting layer 312, the charge generation layer 311, and the second light-emitting layer 313), thereby improving the stealing phenomenon of the display panel and improving the display effect of the display panel. On the other hand, since the insulating structure 40 is set before the cathode layer 320 is prepared, the insulating structure 40 and the cathode layer 320 are staggered along a direction parallel to the plane where the display panel is located, thereby ensuring the continuity of the cathode layer 320 and avoiding the influence of the tip effect caused by the break of the cathode layer 320, thereby further improving the display effect of the display panel.

[0046] Optional, Figure 7 yes Figure 1 Another cross-sectional schematic diagram along the A-A' direction. Figure 7 The light-emitting layer 310 includes a stacked hole injection layer (not shown in the figure), a hole transport layer (not shown in the figure), an electron blocking layer (not shown in the figure), a light-emitting functional layer 3101, a hole blocking layer (not shown in the figure), an electron transport layer (not shown in the figure) and an electron injection layer (not shown in the figure). The hole injection layer is located on the side of the hole transport layer close to the drive substrate 10. The insulating structure 40 runs through the hole injection layer, the hole transport layer, the electron blocking layer, the light-emitting functional layer 3101, the hole blocking layer, the electron transport layer and the electron injection layer.

[0047] For example, Figure 7In the illustrated embodiment, the light-emitting structure 30 includes only one light-emitting layer 310. The light-emitting layer 310 includes a first common film layer 3102, a second common film layer 3103, and a light-emitting functional layer 3101 located between the first common film layer 3102 and the second common film layer 3103. Among them, the first common film layer 3102 is located on the side of the light-emitting functional layer 3101 close to the pixel defining structure 20, and the first common film layer 3102 includes a hole injection layer, a hole transport layer, and an electron blocking layer arranged in a stacked manner. The second common film layer 3103 is located on the side of the light-emitting functional layer 301 away from the pixel defining structure 20. The second common film layer 3103 includes a hole blocking layer, an electron transport layer, and an electron injection layer arranged in a stacked manner. In addition, the anode layer 110 is in contact with the hole injection layer, and the cathode layer 320 is in contact with the electron injection layer structure, so that the anode layer 110 injects holes into the hole injection layer, and the cathode layer 320 injects electrons into the electron injection layer, and the electrons and holes are compounded in the light-emitting functional layer 3101 to form photoexcitons, radiating light. As described above, there is transmission of electrons and holes between the first common film layer 3102, the second common film layer 3103 and the light-emitting functional layer 3101, that is, the first common film layer 3102, the second common film layer 3103 and the light-emitting functional layer 3101 have high conductivity. Therefore, the lateral leakage current between two adjacent light-emitting structures 30 will be transmitted along the first common film layer 3102, the second common film layer 3103 and the light-emitting functional layer 30. Furthermore, in the embodiment of the present invention, an insulating structure 40 is set to penetrate the hole injection layer, the hole transport layer, the electron blocking layer, the light-emitting functional layer 3101, the hole blocking layer, the electron transport layer and the electron injection layer, and the lateral leakage current is blocked from being transmitted in the first common film layer 3102, the second common film layer 3103 and the light-emitting functional layer 3101 through the insulating structure 40, thereby improving the light-stealing phenomenon of the display panel and enhancing the display effect of the display panel.

[0048] Optional, Figure 8 is a schematic diagram of a light emitting structure provided by an embodiment of the present invention. Figure 8 The light emitting structure 30 includes a third light emitting structure 30C and a fourth light emitting structure 30D. The light emitting efficiency of the third light emitting structure 30C is greater than that of the fourth light emitting structure 30D. The insulation structure 40 surrounds at least a portion of the third light emitting structure 30C.

[0049] Specifically, Figure 8In the illustrated embodiment, the luminous efficiency of the third light-emitting structure 30C is greater than that of the fourth light-emitting structure 30D, and thus when the fourth light-emitting structure 30D is lit, a lateral leakage current will flow from the fourth light-emitting structure 30D to the third light-emitting structure 30C, causing the third light-emitting structure 30C to be brighter than before. Therefore, an insulating structure 40 is provided to surround at least a portion of the third light-emitting structure 30C, so that the insulating structure 40 blocks the lateral leakage current flowing to the third light-emitting structure 30C, thereby preventing the third light-emitting structure 30C from being brighter than before, thereby improving the display effect of the display panel.

[0050] It should be noted that Figure 8 The example in which the insulating structure 40 surrounds the entire third light emitting structure 30C is used for illustration only, but this is not limiting. In other embodiments, the insulating structure 40 may also surround a portion of the third light emitting structure 30C.

[0051] Optionally, based on the above embodiment, the insulating structure 40 can also surround any light-emitting structure 30. In other words, the insulating structure 40 can be a mesh structure, and the light-emitting structure 30 is located in the mesh of the mesh structure. Then, the mesh-structured insulating structure 40 can block the lateral leakage between any two adjacent light-emitting structures 30, thereby further improving the brightness stealing phenomenon of the display panel and enhancing the display effect of the display panel.

[0052] Optionally, based on the above embodiment, continue to refer to Figure 5 The insulating structure 40 includes a first insulating surface S2 on a side away from the driving substrate 10 and a second insulating surface S3 on a side close to the driving substrate 10. The area of ​​the first insulating surface S2 is greater than the area of ​​the second insulating surface S3. In other words, the cross section of the insulating structure 40 can be a trapezoid that is wide at the top and narrow at the bottom. In this way, when the insulating opening is formed by laser drilling, it is equivalent to reducing the area of ​​laser etching below, thereby saving laser energy and helping to reduce costs.

[0053] Based on the same inventive concept, an embodiment of the present invention further provides a method for preparing a display panel. Fig. 9 is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention. Fig. 9 , the preparation method comprises:

[0054] S110, providing a driving substrate.

[0055] Specifically, the driving substrate may include a substrate and a driving circuit layer located on one side of the substrate. The substrate substrate may be a rigid substrate substrate or a flexible substrate substrate; the rigid substrate substrate may include a glass substrate or a silicon substrate, and the flexible substrate substrate may include a polyimide substrate or a stainless steel substrate. The substrate substrate may also be other types of substrate substrates known to those skilled in the art, which is not limited in the embodiments of the present invention. The driving circuit layer is provided with a circuit structure for driving the light-emitting element to work normally, for example, it may include an integrated driving circuit, a scanning driving circuit, a pixel driving circuit or other circuit structures known to those skilled in the art, which is not limited in the embodiments of the present invention.

[0056] S120 , preparing a pixel definition structure on one side of the driving substrate.

[0057] Specifically, the pixel defining structure includes a pixel opening section and a pixel defining section. The pixel opening section runs through the pixel defining structure, and the pixel defining section surrounds at least part of the pixel opening section. In addition, before preparing the pixel defining structure, it also includes preparing an anode layer on one side of the driving substrate, and then preparing the pixel defining structure on the anode layer. Along the thickness direction of the display panel, the pixel opening section at least partially overlaps the anode layer, so that the pixel opening section exposes at least part of the anode layer to facilitate the subsequent contact between the anode layer and the light-emitting structure.

[0058] S130, preparing a plurality of light-emitting structures and a plurality of insulating structures on a side of the pixel defining structure away from the driving substrate.

[0059] Specifically, the display panel includes a plurality of light-emitting structures of different colors, and the plurality of light-emitting structures of different colors are arranged in an array. Due to the difference in the excitation materials of the light-emitting layers in the light-emitting structures of different colors, the light-emitting efficiencies of the light-emitting structures of different colors are different. Exemplarily, the light-emitting efficiency of the red light-emitting structure is greater than that of the blue light-emitting structure, and the light-emitting efficiency of the blue light-emitting structure is greater than that of the green light-emitting structure. Since the lateral leakage current will flow to the light-emitting structure with higher luminous efficiency, in the adjacent red light-emitting structure, blue light-emitting structure and green light-emitting structure, when the green light-emitting structure is lit, there will be a lateral leakage current flowing to the blue light-emitting structure or the red light-emitting structure, causing the blue light-emitting structure or the red light-emitting structure to appear to be bright, affecting the display effect of the display panel.

[0060] To this end, the embodiment of the present invention sets an insulating structure on the side of the pixel defining sub-section away from the driving substrate, and the insulating structure is located in the light-emitting layer between two adjacent light-emitting structures. Exemplarily, the insulating structure can be located between any two adjacent light-emitting structures, that is, the insulating structure is set between the red light-emitting structure and the blue light-emitting structure, between the red light-emitting structure and the green light-emitting structure, and between the blue light-emitting structure and the green light-emitting structure, but the embodiment of the present invention is not limited to this. In other embodiments, the insulating structure can also be located between two light-emitting structures with different luminous efficiencies. For example, if the luminous efficiency of the red light-emitting structure is similar to that of the blue light-emitting structure, and the luminous efficiency of the green light-emitting structure is less than that of the red light-emitting structure, then the insulating structure can be set only between the red light-emitting structure and the green light-emitting structure and between the blue light-emitting structure. Those skilled in the art can set it as needed. Since the lateral leakage current is usually transmitted in the light-emitting layer of two adjacent light-emitting structures, and then along the thickness direction of the display panel, an insulating structure is set to penetrate at least part of the light-emitting layer to block the lateral leakage current through the insulating structure, thereby avoiding the lateral leakage current from being transmitted in the light-emitting layer between the two adjacent light-emitting structures, improving the stealing light phenomenon of the display panel, and improving the display effect of the display panel.

[0061] In summary, the embodiment of the present invention prepares a plurality of light-emitting structures and a plurality of insulating structures on the side of the pixel defining structure away from the driving substrate. The insulating structure is located on the side of the pixel defining structure away from the driving substrate and between two adjacent light-emitting structures. Along the thickness direction of the display panel, the insulating structure at least penetrates a portion of the light-emitting layer. In this way, the lateral leakage current between the two adjacent light-emitting structures is blocked by the insulating structure, and the lateral leakage current is prevented from being transmitted in the light-emitting layer between the two adjacent light-emitting structures, thereby improving the light-stealing phenomenon of the display panel and enhancing the display effect of the display panel.

[0062] Optional, Fig.10 is a flow chart of another method for preparing a display panel provided by an embodiment of the present invention. Fig.10 , the preparation method comprises:

[0063] S210, providing a driving substrate.

[0064] S220 , preparing a pixel definition structure on one side of the driving substrate.

[0065] S230 , preparing a light-emitting layer and a first cathode layer respectively on a side of the pixel defining structure away from the driving substrate.

[0066] Specifically, in this embodiment, the light-emitting structure includes a light-emitting layer, and the light-emitting layer may include one light-emitting layer, or may include two light-emitting layers, which are not limited herein. The cathode layer includes a first cathode layer and a second cathode layer. In order to ensure the continuity of the cathode layer composed of the first cathode layer and the second cathode layer, the light-emitting layer is first prepared on the side of the pixel defining structure away from the driving substrate, and the first cathode layer is prepared on the light-emitting layer.

[0067] S240, in an inert gas environment, using a laser drilling process to form insulating openings in the light-emitting layer and the first cathode layer.

[0068] Specifically, after the light-emitting layer and the first cathode layer are prepared, the first cathode layer has a certain protective effect on the light-emitting layer below, so that in an inert gas environment, an insulating opening is formed in the light-emitting layer and the first cathode layer using a laser drilling process, and the insulating opening passes through the light-emitting layer and the first cathode layer along the thickness direction of the display panel.

[0069] S250 , filling the insulating opening with an insulating material to form an insulating structure, and preparing a second cathode layer on a side of the first cathode layer away from the driving substrate.

[0070] Specifically, an insulating material is filled in the insulating opening to form an insulating structure. The insulating structure penetrates the light-emitting layer along the thickness direction of the display panel, and then the lateral leakage between two adjacent light-emitting structures is blocked by the insulating structure, thereby improving the light-stealing phenomenon of the display panel. In addition, since the first cathode layer is prepared first during preparation, after the first cathode layer is prepared, an insulating structure is set so that the insulating structure penetrates the light-emitting layer and the first cathode layer, and then the second cathode layer is prepared on the side of the first cathode layer away from the driving substrate. In this way, the insulating structure only penetrates the first cathode layer, and the second cathode layer is still continuous as a whole layer, and the first cathode layer and the second cathode layer are in contact and electrically connected. Therefore, the cathode layer is guaranteed to be continuous. On the basis of blocking the lateral leakage, the influence of the tip effect caused by the break of the cathode layer is avoided, thereby improving the display effect of the display panel.

[0071] In summary, the embodiment of the present invention first prepares the light-emitting layer and the first cathode layer, then punches holes in the light-emitting layer and the first cathode layer in an inert gas environment to form an insulating structure that penetrates the light-emitting layer and the first cathode layer, and finally prepares the second cathode layer on the side of the first cathode layer away from the driving substrate. In this way, the cathode layer composed of the first cathode layer and the second cathode layer is a continuous whole layer, and on the basis of blocking the lateral leakage through the insulating structure, the influence of the tip effect caused by the cathode layer break is also avoided, thereby improving the display effect of the display panel.

[0072] Optional, Fig.11 FIG. 1 is a flow chart of another method for manufacturing a display panel provided by an embodiment of the present invention. Fig.11 , the preparation method comprises:

[0073] S310, providing a driving substrate.

[0074] S320 , preparing a pixel definition structure on one side of the driving substrate.

[0075] S330, preparing a first light-emitting layer and a charge generating layer respectively on a side of the pixel defining structure away from the driving substrate.

[0076] Specifically, in this embodiment, the light-emitting structure includes two light-emitting layers and a charge generation layer located between the two light-emitting layers. The two light-emitting layers include a first light-emitting layer and a second light-emitting layer. Since the charge generation layer is used to generate holes and electrons, and thus the electrical conductivity of the charge generation layer is relatively high, lateral leakage is prone to occur. Therefore, an insulating structure is required to block the transmission of lateral leakage in the charge generation layer. In the preparation process, the first light-emitting layer and the charge generation layer are first prepared on the side of the pixel defining structure away from the driving substrate, so as to facilitate the subsequent digging of holes in the charge generation layer.

[0077] S340, in an inert gas environment, using a laser drilling process to form an insulating opening in the charge generation layer.

[0078] Specifically, after the charge generation layer is prepared, since in the embodiment of the present invention only the transmission of the lateral leakage current in the charge generation layer needs to be blocked, an insulating opening is formed in the charge generation layer by a laser drilling process under an inert gas environment, and the insulating opening passes through the charge generation layer along the thickness direction of the display panel.

[0079] S350, filling the insulating opening with an insulating material to form an insulating structure, and preparing a second light-emitting layer and a cathode layer on a side of the charge generating layer away from the driving substrate.

[0080] Specifically, an insulating material is filled in the insulating opening to form an insulating structure. The insulating structure penetrates the charge generation layer along the thickness direction of the display panel, and then the insulating structure is used to block the lateral leakage of the charge generation layer between two adjacent light-emitting structures, thereby improving the light-stealing phenomenon of the display panel. In addition, since the first light-emitting layer and the charge generation layer are prepared first during the preparation, after the charge generation layer is prepared, the insulating structure is set so that the insulating structure penetrates the charge generation layer, and then the second light-emitting layer and the cathode layer are prepared on the side of the charge generation layer away from the driving substrate. In this way, the insulating structure only penetrates the charge generation layer, ensuring that the cathode layer is continuous. Therefore, on the basis of blocking the lateral leakage, the influence of the tip effect caused by the break of the cathode layer is avoided, thereby improving the display effect of the display panel.

[0081] In summary, the embodiment of the present invention first prepares the first light-emitting layer and the charge generation layer, then punches holes in the charge generation layer under an inert gas environment to form an insulating structure that penetrates the charge generation layer, and finally prepares the second light-emitting layer and the cathode layer on the side of the charge generation layer away from the driving substrate. In this way, the cathode layer is continuous as a whole layer, and on the basis of blocking the lateral leakage through the insulating structure, the influence of the tip effect caused by the break of the cathode layer is also avoided, thereby improving the display effect of the display panel.

[0082] Optional, Fig.12 FIG. 1 is a flow chart of another method for manufacturing a display panel provided by an embodiment of the present invention. Fig.12 , the preparation method comprises:

[0083] S410, providing a driving substrate.

[0084] S420 , preparing a pixel definition structure on one side of the driving substrate.

[0085] S430, respectively preparing a first light-emitting layer, a charge generating layer, and a second light-emitting layer on a side of the pixel defining structure away from the driving substrate.

[0086] Specifically, the light-emitting structure includes two light-emitting layers and a charge generation layer located between the two light-emitting layers. The two light-emitting layers include a first light-emitting layer and a second light-emitting layer. In this embodiment, considering that the first light-emitting layer and the second light-emitting layer both have a common film layer and have a high electrical conductivity, and thus there is also lateral leakage transmission between the first light-emitting layer and the second light-emitting layer, an insulating structure is required to block the transmission of lateral leakage in the charge generation layer, the first light-emitting layer, and the second light-emitting layer. In the preparation process, the first light-emitting layer, the charge generation layer, and the second light-emitting layer are respectively prepared on the side of the pixel defining structure away from the driving substrate to facilitate the subsequent digging of holes in the first light-emitting layer, the charge generation layer, and the second light-emitting layer.

[0087] S340, in an inert gas environment, using a laser drilling process to form insulating openings in the first light-emitting layer, the charge generation layer, and the second light-emitting layer.

[0088] Specifically, after the second light-emitting layer is prepared, since it is necessary to block the transmission of lateral leakage current in the charge generation layer, the first light-emitting layer and the second light-emitting layer, an insulating opening is formed in the charge generation layer, the first light-emitting layer and the second light-emitting layer by a laser drilling process in an inert gas environment. Along the thickness direction of the display panel, the insulating opening passes through the charge generation layer, the first light-emitting layer and the second light-emitting layer.

[0089] S250, filling the insulating opening with an insulating material to form an insulating structure, and preparing a cathode layer on a side of the second light-emitting layer away from the driving substrate.

[0090] Specifically, an insulating material is filled in the insulating opening to form an insulating structure. Along the thickness direction of the display panel, the insulating structure penetrates the charge generation layer, the first light-emitting layer, and the second light-emitting layer, and then the insulating structure is used to block the lateral leakage of the charge generation layer, the first light-emitting layer, and the second light-emitting layer between two adjacent light-emitting structures, thereby improving the light-stealing phenomenon of the display panel. In addition, since the first light-emitting layer, the charge generation layer, and the second light-emitting layer are prepared first during preparation, after the second light-emitting layer is prepared, an insulating structure is set so that the insulating structure penetrates the first light-emitting layer, the charge generation layer, and the second light-emitting layer, and then the cathode layer is prepared on the side of the second light-emitting layer away from the driving substrate. In this way, the insulating structure only penetrates the light-emitting layer, ensuring that the cathode layer is continuous. Therefore, on the basis of blocking the lateral leakage, the influence of the tip effect caused by the break of the cathode layer is avoided, thereby improving the display effect of the display panel.

[0091] In summary, the embodiment of the present invention first prepares the first light-emitting layer, the charge generation layer and the second light-emitting layer, then punches holes in the first light-emitting layer, the charge generation layer and the second light-emitting layer in an inert gas environment to form an insulating structure that penetrates the first light-emitting layer, the charge generation layer and the second light-emitting layer, and finally prepares the cathode layer on the side of the second light-emitting layer away from the driving substrate. In this way, the cathode layer is continuous as a whole layer, and on the basis of blocking the lateral leakage through the insulating structure, the influence of the tip effect caused by the break of the cathode layer is also avoided, thereby improving the display effect of the display panel.

[0092] Based on the same inventive concept, an embodiment of the present invention further provides a display device. Fig.13 FIG. 1 is a schematic diagram of a display device provided by an embodiment of the present invention. Fig.13 As shown, the display device includes the display panel 100 in the above embodiment. The display device includes the display panel 100 of any embodiment of the present invention. Therefore, the display device provided by the embodiment of the present invention has the corresponding beneficial effects of the display panel 100 provided by the embodiment of the present invention, which will not be repeated here. Exemplarily, the display device can be an electronic device such as a mobile phone, a computer, a smart wearable device (for example, a smart watch), and a car display device, which is not limited in the embodiment of the present invention.

[0093] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include; Driver substrate; A pixel defining structure, located on one side of the driving substrate; The pixel definition structure includes a plurality of pixel opening subdivisions and a plurality of pixel definition subdivisions; A plurality of light-emitting structures are located on a side of the pixel defining structure away from the driving substrate and at least cover the pixel opening portion; The light-emitting structure comprises a light-emitting layer; The insulating structure is located on a side of the pixel defining portion away from the driving substrate and between two adjacent light emitting structures; along the thickness direction of the display panel, the insulating structure at least penetrates a portion of the light emitting layer.

2. The display panel according to claim 1, characterized in that: The light emitting structure further comprises a cathode layer, wherein the cathode layer is located on a side of the light emitting layer away from the driving substrate; The cathode layer includes a first cathode surface away from the driving substrate, and the insulating structure includes a first insulating surface away from the driving substrate; the first cathode surface includes a first surface portion, and along the thickness direction of the display panel, the first surface portion overlaps with the insulating structure; The light-emitting layer includes a charge generating layer; The insulating structure penetrates the charge generating layer, and the first insulating surface is located at a side of the first surface portion close to the driving substrate.

3. The display panel according to claim 2, characterized in that: The cathode layer includes a first cathode layer and a second cathode layer, wherein the first cathode layer is located on a side of the second cathode layer close to the drive substrate; The insulating structure penetrates the first cathode layer along a thickness direction of the display panel.

4. The display panel according to claim 3, characterized in that: The light-emitting layer further comprises a first light-emitting layer and a second light-emitting layer, wherein the first light-emitting layer is located on a side of the charge generating layer close to the driving substrate, and the second light-emitting layer is located on a side of the charge generating layer close to the cathode layer; Along the thickness direction of the display panel, the insulating structure penetrates the first light-emitting layer, the charge generating layer, the second light-emitting layer and the first cathode layer.

5. The display panel according to claim 3, characterized in that: The two adjacent light-emitting structures include a first light-emitting structure and a second light-emitting structure, and the first light-emitting structure and the second light-emitting structure have different light-emitting colors; The minimum distance between the orthographic projection of the pixel opening section corresponding to the first light-emitting structure on the driving substrate and the orthographic projection of the insulating structure adjacent to it on the driving substrate is L1, and the minimum distance between the orthographic projection of the pixel opening section corresponding to the second light-emitting structure on the driving substrate and the orthographic projection of the insulating structure adjacent to it on the driving substrate is L2, wherein |L1-L2| / L1≤20%.

6. The display panel according to claim 2, characterized in that: The light-emitting layer further comprises a first light-emitting layer and a second light-emitting layer, wherein the first light-emitting layer is located on a side of the charge generating layer close to the driving substrate, and the second light-emitting layer is located on a side of the charge generating layer close to the cathode layer; The insulating structure further comprises a second insulating surface close to one side of the driving substrate; The first insulating surface is located at the interface between the second light-emitting layer and the charge generating layer, or is located within the second light-emitting layer; The second insulating surface is located at a junction of the first light-emitting layer and the charge generating layer, or is located in the first light-emitting layer.

7. The display panel according to claim 2, characterized in that: The light-emitting layer further comprises a first light-emitting layer and a second light-emitting layer, wherein the first light-emitting layer is located on a side of the charge generating layer close to the driving substrate, and the second light-emitting layer is located on a side of the charge generating layer close to the cathode layer; The insulating structure penetrates the first light emitting layer, the charge generating layer, and the second light emitting layer.

8. The display panel according to claim 1, characterized in that: The light-emitting layer includes a stacked hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting functional layer, a hole blocking layer, an electron transport layer and an electron injection layer; the hole injection layer is located on a side of the hole transport layer close to the drive substrate; The insulating structure penetrates the hole injection layer, the hole transport layer, the electron blocking layer, the light emitting functional layer, the hole blocking layer, the electron transport layer and the electron injection layer.

9. The display panel according to claim 1, characterized in that: The light-emitting structure includes a third light-emitting structure and a fourth light-emitting structure, and the light-emitting efficiency of the third light-emitting structure is greater than the light-emitting efficiency of the fourth light-emitting structure; The insulating structure surrounds at least a portion of the third light emitting structure.

10. The display panel according to claim 9, characterized in that: The insulating structure surrounds any of the light emitting structures.

11. The display panel according to claim 1, characterized in that: The insulating structure comprises a first insulating surface away from the driving substrate and a second insulating surface close to the driving substrate; An area of ​​the first insulating surface is greater than an area of ​​the second insulating surface.

12. A method for preparing a display panel, characterized in that: include: Providing a drive substrate; Preparing a pixel definition structure on one side of the driving substrate; The pixel definition structure includes a plurality of pixel opening subdivisions and a plurality of pixel definition subdivisions; A plurality of light-emitting structures and a plurality of insulating structures are prepared on a side of the pixel defining structure away from the driving substrate; wherein the light-emitting structure at least covers the pixel opening portion, and the light-emitting structure includes a light-emitting layer; the insulating structure is located on a side of the pixel defining portion away from the driving substrate and between two adjacent light-emitting structures; along the thickness direction of the display panel, the insulating structure at least penetrates a portion of the light-emitting layer.

13. The preparation method according to claim 12, characterized in that: The method of preparing a plurality of light emitting structures and a plurality of insulating structures on a side of the pixel defining structure away from the driving substrate comprises: A light-emitting layer and a first cathode layer are respectively prepared on a side of the pixel defining structure away from the driving substrate; In an inert gas environment, using a laser drilling process to form insulating openings in the light-emitting layer and the first cathode layer; Filling the insulating opening with insulating material to form the insulating structure; along the thickness direction of the display panel, the insulating structure penetrates the light emitting layer and the first cathode layer; A second cathode layer is formed on a side of the first cathode layer away from the driving substrate.

14. The preparation method according to claim 12, characterized in that: The method of preparing a plurality of light emitting structures and a plurality of insulating structures on a side of the pixel defining structure away from the driving substrate comprises: A first light-emitting layer and a charge generating layer are respectively prepared on a side of the pixel defining structure away from the driving substrate; In an inert gas environment, an insulating opening is formed in the charge generation layer by a laser drilling process; Filling the insulating opening with an insulating material to form the insulating structure, wherein the insulating structure penetrates the charge generating layer along a thickness direction of the display panel; A second light emitting layer and a cathode layer are respectively prepared on a side of the charge generating layer away from the driving substrate.

15. The preparation method according to claim 12, characterized in that: The method of preparing a plurality of light emitting structures and a plurality of insulating structures on a side of the pixel defining structure away from the driving substrate comprises: A first light-emitting layer, a charge generation layer, and a second light-emitting layer are respectively prepared on a side of the pixel definition structure away from the drive substrate; In an inert gas environment, using a laser drilling process to form insulating openings in the first light-emitting layer, the charge generation layer, and the second light-emitting layer; Filling the insulating opening with an insulating material to form the insulating structure, wherein the insulating structure penetrates the first light-emitting layer, the charge generating layer and the second light-emitting layer along the thickness direction of the display panel; A cathode layer is prepared on a side of the second light emitting layer away from the driving substrate.

16. A display device, characterized in that: A display panel comprising any one of claims 1 to 11.

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