Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises a substrate and a plurality of light-emitting devices, and the plurality of light-emitting devices comprise a first light-emitting device, a second light-emitting device and a third light-emitting device which are different in light-emitting color. The light-emitting device comprises a first electrode, a first light-emitting layer, a second light-emitting layer and a first charge generation layer, the first light-emitting layer is located on the side, away from the substrate, of the first electrode, the second light-emitting layer is located on the side, away from the first electrode, of the first light-emitting layer, and the first charge generation layer is located between the first light-emitting layer and the second light-emitting layer. Wherein at least part of the first charge generation layer included in the first light-emitting device is not connected with the first charge generation layers included in the second light-emitting device and the third light-emitting device, and the first charge generation layer included in the second light-emitting device and the first charge generation layer included in the third light-emitting device are of a complete integrated structure. According to the scheme, the preparation difficulty and cost can be reduced on the premise of weakening the leakage current received by the first light-emitting device.

Description

Technical Field

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

[0002] In existing display panels, part of the film layer in the light-emitting device is usually a complete integrated structure with part of the film layer in other light-emitting devices, and the above-mentioned part of the film layer can be a common layer in the display panel (such as a charge generation layer). It should be noted that light-emitting devices with different luminous colors require different start-up voltages when emitting light. If the charge generation layers corresponding to the two light-emitting devices with different luminous colors are complete integrated structures, when the light-emitting device with a higher start-up voltage emits light, there is a risk that the other light-emitting device will be illuminated secretly. Summary of the invention

[0003] In view of this, the present application provides a display panel and a display device.

[0004] In a first aspect, the present application provides a display panel, comprising a substrate and a plurality of light-emitting devices, wherein the light-emitting devices are located on one side of the substrate; the plurality of light-emitting devices include a first light-emitting device, a second light-emitting device, and a third light-emitting device, each emitting light of different colors; The light emitting device includes: A first electrode, located on one side of the substrate; A first light-emitting layer is located on a side of the first electrode away from the substrate; A second light-emitting layer is located on a side of the first light-emitting layer away from the first electrode; A first charge generation layer is located between the first light-emitting layer and the second light-emitting layer; Among them, at least part of the first charge generation layer included in the first light-emitting device is not connected to the first charge generation layer included in the second light-emitting device and the third light-emitting device, and the first charge generation layer included in the second light-emitting device and the first charge generation layer included in the third light-emitting device are a complete integrated structure.

[0005] In a second aspect, based on the same inventive concept, the present application provides a display device, comprising a display panel provided in the first aspect.

[0006] In the embodiment of the present application, only the portion of the first charge generation layer corresponding to the first light-emitting device is patterned, and the portions of the first charge generation layer corresponding to the second light-emitting device and the third light-emitting device respectively remain a complete integrated structure. This solution can solve the problems of complex process and high manufacturing cost caused by the large number of patterned areas of the first charge generation layer, while achieving the premise of reducing or eliminating the leakage current transmitted to the first light-emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0008] Figure 1 It is a schematic diagram of the structure of a part of the film layer of a display panel related to the present application; Figure 2 A schematic top view of a portion of a film layer of a display panel provided in the present application; Figure 3 for Figure 2 The cross-sectional schematic diagram of the display panel along AA' is shown; Figure 4 Another schematic top view of a part of the film layer of a display panel provided by the present application; Figure 5 A schematic diagram of the structure of a part of the film layer of a display panel provided in the present application; Figure 6 A schematic top view of a portion of a film layer of a display panel provided in the present application; Figure 7 for Figure 6 The cross-sectional schematic diagram of the display panel along BB' is shown; Figure 8 A schematic diagram of the structure of a part of the film layer of a display panel provided in the present application; Fig. 9 A schematic diagram of the structure of a part of the film layer of a display panel provided in the present application; Fig.10 A schematic diagram of the structure of a part of the film layer of a display panel provided in the present application; Fig.11 A schematic diagram of a display device provided in the present application. DETAILED DESCRIPTION

[0009] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0010] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0011] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0012] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0013] It is obvious to those skilled in the art that various modifications and changes can be made in this application without departing from the spirit or scope of this application. Therefore, this application is intended to cover modifications and changes of this application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0014] Figure 1 It is a schematic diagram of the structure of a partial film layer of a display panel related to the present application.

[0015] In related technologies, such as Figure 1 As shown, the display panel 10' generally includes a plurality of light-emitting devices 01', and the plurality of light-emitting devices 01' may include a first light-emitting device 01a', a second light-emitting device 01b' and a third light-emitting device 01c', wherein the first light-emitting device 01a', the second light-emitting device 01b' and the third light-emitting device 01c' each have a different light-emitting color. Part of the film layer in the first light-emitting device 01a', part of the film layer in the second light-emitting device 01b' and part of the film layer in the third light-emitting device 01c' may be a complete integrated structure (i.e., there is no physical partition between adjacent parts), and the partial film layer may include a charge generation layer 02'. Therefore, carriers may be transferred between the first light-emitting device 01a', the second light-emitting device 01b' and the third light-emitting device 01c' through the charge generation layer 02', that is, the charge generation layer 02' may serve as a transmission channel for leakage current.

[0016] In addition, the light emitting device 01' may also include a first light emitting layer 03', a second light emitting layer 04', an electron transport layer 05', a hole transport layer 06', a hole injection layer 07', a first electrode 08', a second electrode 09' and a hole blocking layer 010'. The above film layer structure is as follows: Figure 1 As shown in , no further description is given here.

[0017] It should be noted that the start-up voltages corresponding to two light-emitting devices with different luminous colors are often different. For example, the start-up voltage of a light-emitting device with a blue luminous color may be V1, the start-up voltage of a light-emitting device with a green luminous color may be V2, and the start-up voltage of a light-emitting device with a red luminous color may be V3. Under the same luminous area and other factors, V1>V2>V3 exists. If the luminous color of the first light-emitting device 01a' is red and the luminous color of the second light-emitting device 01b' is blue, when the second light-emitting device 01b' emits light, the portion of the charge generation layer 02' corresponding to the second light-emitting device 01b' can generate a large number of carriers to meet the start-up requirements of the second light-emitting device 01b' (the larger the start-up voltage of the light-emitting device 01', the more carriers the charge generation layer needs to generate). At this time, the carriers can be transferred to the first light-emitting device 01a' through the charge generation layer 02'. Since the turn-on voltage of the first light-emitting device 01a' is relatively small, the number of carriers transferred from the second light-emitting device 01b' can easily meet the turn-on requirement of the first light-emitting device 01a', resulting in the phenomenon that the first light-emitting device 01a' is turned on secretly, reducing the display effect. Correspondingly, the light color of the third light-emitting device 01c' can be green, so when the third light-emitting device 01c' emits light, it is also easy to cause the first light-emitting device 01a' to be turned on secretly.

[0018] Figure 2 This is a schematic top view of a portion of a film layer of a display panel provided in the present application. Figure 3 for Figure 2 The cross-sectional view of the display panel along AA' is shown.

[0019] In view of the above problems, combined with Figure 2 and Figure 3 The present application provides a display panel 10 , which includes a substrate 01 and a plurality of light-emitting devices 02 , wherein the light-emitting devices 02 are located on one side of the substrate 01 .

[0020] The plurality of light-emitting devices 02 include a first light-emitting device 02a, a second light-emitting device 02b, and a third light-emitting device 02c, each of which emits light of different colors. The first light-emitting device 02a, the second light-emitting device 02b, and the third light-emitting device 02c may have different start-up voltages. For example, the start-up voltage of the first light-emitting device 02a may be Va, the start-up voltage of the second light-emitting device 02b may be Vb, and the start-up voltage of the third light-emitting device 02c may be Vc, and Vc>Vb>Va exists. Therefore, compared with the second light-emitting device 02b and the third light-emitting device 02c, the first light-emitting device 02a is more likely to be lit secretly. In addition, the first light-emitting device 02a, the second light-emitting device 02b, and the third light-emitting device 02c may be adjacent.

[0021] The light emitting device 02 includes: a first electrode 021, a first light emitting layer 022, a second light emitting layer 023 and a first charge generating layer 024. The first electrode 021 is located on one side of the substrate 01, and the first electrode 021 can be an anode or a cathode of the light emitting device 02. The first light emitting layer 022 is located on the side of the first electrode 021 away from the substrate, and the first light emitting layer 022 can receive carriers transmitted by the first electrode 021 to emit light. The second light emitting layer 023 is located on the side of the first light emitting layer 022 away from the first electrode 021. The first charge generating layer 024 is located between the first light emitting layer 022 and the second light emitting layer 023, and the first charge generating layer 024 can be used to generate carriers, and can transmit the carriers generated by it to the first light emitting layer 022 and the second light emitting layer 023.

[0022] In addition, the light emitting device 02 may further include a second electrode 025, and the second electrode 025 may be located on a side of the second light emitting layer 023 away from the first electrode 021. One of the second electrode 025 and the first electrode 021 may be an anode and the other may be a cathode; the second electrodes 025 corresponding to different light emitting devices 02 may be a complete integrated structure and the first electrodes 021 may not be connected (corresponding to Figure 4 It is worth noting that when the light-emitting device 02 needs to emit light, there may be a potential difference between the first electrode 021 and the second electrode 025, thereby generating an electric field therebetween. Under the action of the electric field, the first charge generation layer 024 may generate carriers (such as electrons and holes) for realizing the light-emitting device 02 to emit light.

[0023] The light emitting device 02 may also include an electron transport layer, an electron injection layer, a hole transport layer, a hole injection layer, a hole blocking layer and other film layers. Figure 3 , Figure 4 Displayed in.

[0024] Among them, combined Figure 2 and Figure 3 , at least part of the first charge generation layer 024 included in the first light-emitting device 02a is not connected to the first charge generation layer 024 included in the second light-emitting device 02b and the third light-emitting device 02c, and the first charge generation layer 024 included in the second light-emitting device 02b and the first charge generation layer 024 included in the third light-emitting device 02c are a complete integrated structure (that is, there is no physical partition between adjacent parts).

[0025] Combination Figure 2 and Figure 3There may be a physical isolation region M between the first light emitting device 02a and the second light emitting device 02b and the third light emitting device 02c, and the first charge generation layer 024 may not be provided in the physical isolation region M. The physical isolation region M may partially surround the first charge generation layer 024 of the first light emitting device 02a, and the portion of the first charge generation layer 024 of the first light emitting device 02a that is not surrounded by the physical isolation region M may be connected to the first charge generation layer 024 included in the second light emitting device 02b and the third light emitting device 02c.

[0026] In addition, the physical isolation region M may also completely surround the first charge generation layer 024 of the first light-emitting device 02a. For this situation, please refer to the following implementation contents.

[0027] In the embodiment of the present application, only the portion of the first charge generation layer 024 corresponding to the first light-emitting device 02a is patterned, and the portions of the first charge generation layer 024 corresponding to the second light-emitting device 02b and the third light-emitting device 02c are still a complete integrated structure. This solution can reduce or eliminate the leakage current transmitted to the first light-emitting device 02a, while solving the problems of complex process and high manufacturing cost caused by the large number of patterned areas of the first charge generation layer 024.

[0028] Figure 4 Another schematic top view of a partial film layer of a display panel provided in the present application.

[0029] In one embodiment of the present application, Figure 4 As shown, the first charge generation layer 024 included in the first light-emitting device 02a is completely disconnected from the first charge generation layer 024 included in the second light-emitting device 02b and the third light-emitting device 02c. A physical isolation (partitioning) region M may exist between the first light-emitting device 02a and the second light-emitting device 02b and the third light-emitting device 02c, and the first charge generation layer 024 may not be disposed in the physical isolation region M. Figure 4 As shown, the physical isolation region M can completely surround the first charge generation layer 024 of the first light-emitting device 02a, and it can be regarded that the physical isolation region M completely separates the first charge generation layer 024 of the first light-emitting device 02a from the first charge generation layer 024 included in the second light-emitting device 02b and the third light-emitting device 02c. Therefore, the carriers on the first charge generation layer 024 included in the second light-emitting device 02b and the third light-emitting device 02c cannot be transferred to the first charge generation layer 024 included in the first light-emitting device 02a through the physical isolation region M.

[0030] The arrangement of this embodiment is conducive to completely blocking the transmission path of carriers on the first charge generation layer 024 between the first light-emitting device 02a and the second light-emitting device 02b and the third light-emitting device 02c, thereby avoiding the phenomenon of the first light-emitting device 02a shining secretly.

[0031] Figure 5 A schematic diagram of the structure of a partial film layer of a display panel provided in the present application.

[0032] In one embodiment of the present application, Figure 5 As shown, the display panel 10 further includes a second charge generation layer 026 , and the second charge generation layer 026 is located between the first light emitting layer 022 and the second light emitting layer 023 .

[0033] Similar to the first charge generation layer 024, the second charge generation layer 026 can also generate carriers (e.g., electrons, holes). When the light-emitting device 02 needs to emit light, the electric field generated by the first electrode 021 and the second electrode 025 can prompt the second charge generation layer 026 to generate carriers, and the carriers can be transferred to the first light-emitting layer 022 or the second light-emitting layer 023 to participate in the light-emitting process. In this embodiment, the first charge generation layer 024 and the second charge generation layer 026 can both serve as carrier providers to meet the light-emitting needs of the first light-emitting layer 022 and the second light-emitting layer 023.

[0034] In one embodiment of the present application, the majority carriers of the first charge generation layer 024 and the second charge generation layer 026 are electrons, and the majority carriers of the other are holes. The first charge generation layer 024 and the second charge generation layer 026 may contact each other to form a PN junction, and under the action of the electric field of the first electrode 021 and the second electrode 025, one of the first charge generation layer 024 and the second charge generation layer 026 may generate electrons and holes. Subsequently, the electrons and holes are redistributed in the first charge generation layer 024 and the second charge generation layer 026 (the above-mentioned PN junction can play a role in accelerating the redistribution of electrons and holes), resulting in the majority carriers of the first charge generation layer 024 and the second charge generation layer 026 being electrons, and the majority carriers of the other being holes. It should be noted that one of the first charge generation layer 024 and the second charge generation layer 026 can transfer carriers to the first light-emitting layer 022, and the other can transfer carriers to the second light-emitting layer 023.

[0035] In the embodiment of the present application, the majority carriers corresponding to the first charge generation layer 024 are different from the majority carriers corresponding to the second charge generation layer 026, so that different carriers can be provided to the first light-emitting layer 022 and the second light-emitting layer 023 respectively to meet the requirement that both the first light-emitting layer 022 and the second light-emitting layer 023 emit light.

[0036] In one embodiment of the present application, Figure 5 As shown, the first charge generation layer 024 is located on the side of the second charge generation layer 026 close to the first light-emitting layer 022. When the light-emitting device 02 emits light, the first light-emitting layer 022 can receive the carriers generated by the first electrode 021 and the majority carriers in the first charge generation layer 024, and one of the carriers generated by the first electrode 021 and the majority carriers in the first charge generation layer 024 is an electron, and the other is a hole; the second light-emitting layer 023 can receive the carriers generated by the second electrode 022 and the majority carriers in the second charge generation layer 026, and one of the carriers generated by the second electrode 022 and the majority carriers in the second charge generation layer 026 is an electron, and the other is a hole.

[0037] In the embodiment of the present application, the first charge generation layer 024 is closer to the first light-emitting layer 022 than the second charge generation layer 026; the second charge generation layer 026 is closer to the second light-emitting layer 023 than the first charge generation layer 024. This arrangement is conducive to improving the efficiency of the majority carriers in the first charge generation layer 024 being transferred to the first light-emitting layer 022, and is also conducive to improving the efficiency of the majority carriers in the second charge generation layer 026 being transferred to the second light-emitting layer 023.

[0038] In one embodiment of the present application, Figure 5 As shown, the second charge generation layer 026 of the first light-emitting device 02a and the second charge generation layer 026 of the second light-emitting device 02b are a complete integrated structure, and at least part of the second charge generation layer 026 of the second light-emitting device 02b is not connected to the second charge generation layer 026 of the third light-emitting device 02c.

[0039] In addition to the first charge generation layer 024, the second charge generation layer 026 can also be used as a channel for leakage current transmission. In the embodiment of the present application, by setting at least part of the second charge generation layer 026 of the second light-emitting device 02b to be disconnected from the second charge generation layer 026 of the third light-emitting device 02c, it is helpful to avoid the transfer of carriers between the second charge generation layer 026 of the third light-emitting device 02c and the second charge generation layer 026 of the second light-emitting device 02b. In addition, in the present embodiment, the second charge generation layer 026 of the first light-emitting device 02a and the second charge generation layer 026 of the second light-emitting device 02b are set as a complete integrated structure, which can reduce the process steps required for preparing the second charge generation layer 026, reduce the number of masks required, and reduce the preparation cost. Optionally, the second charge generation layer 026 of the first light-emitting device 02a and the second charge generation layer 026 of the second light-emitting device 02b are a complete integrated structure, and the second charge generation layer 026 of the second light-emitting device 02b is completely disconnected from the second charge generation layer 026 of the third light-emitting device 02c.

[0040] Figure 6 This is a schematic top view of a portion of a film layer of a display panel provided in the present application. Figure 7 for Figure 6 The cross-sectional view of the display panel along the line BB' is shown.

[0041] In one embodiment of the present application, Figure 6 and Figure 7 , at least part of the second charge generation layer 026 of the first light-emitting device 02a is not connected to the second charge generation layer 026 of the second light-emitting device 02b, and the second charge generation layer 026 of the second light-emitting device 02b and the second charge generation layer 026 of the third light-emitting device 02c are a complete integrated structure.

[0042] In the embodiment of the present application, the charge generation layer (including the first charge generation layer 024 and the second charge generation layer 026) of the second light-emitting device 02b and the charge generation layer of the third light-emitting device 02c are a complete integrated structure, and this arrangement helps to reduce the preparation steps when preparing the charge generation layer. If there is no connection between at least part of the charge generation layer of the first light-emitting device 02a and the charge generation layer of the second light-emitting device 02b, the leakage current blocking effect can be achieved on both the first charge generation layer 024 and the second charge generation layer 026, further reducing the probability of the first light-emitting device 02a being secretly lit. Optionally, the second charge generation layer 026 of the first light-emitting device 02a is completely unconnected to the second charge generation layer 026 of the second light-emitting device 02b, and the second charge generation layer 026 of the second light-emitting device 02b and the second charge generation layer 026 of the third light-emitting device 02c are a complete integrated structure.

[0043] In one possible implementation, combining Figure 6 and Figure 7 There is a first hollow region A1 between the first charge generation layer 024 of the first light-emitting device 02a and the first charge generation layer 024 of the second light-emitting device 02b; there is a second hollow region A2 between the second charge generation layer 026 of the first light-emitting device 02a and the second charge generation layer 026 of the second light-emitting device 02b; The first hollow area A1 and the second hollow area A2 at least partially overlap along a direction perpendicular to the plane where the display panel 10 is located. In particular, the first hollow area A1 can overlap with the second hollow area A2.

[0044] In this implementation, considering that the charge generation layer can be prepared by evaporation, since the first hollowed-out area A1 can overlap with the second hollowed-out area A2, the first charge generation layer 024 of the first light-emitting device 02a can also overlap with the second charge generation layer 026. Therefore, when preparing the charge generation layer of the first light-emitting device 02a, the first charge generation layer 024 and the second charge generation layer 026 can be prepared using the same mask, which helps to reduce the number of masks required and reduce process costs.

[0045] Figure 8 A schematic diagram of the structure of a partial film layer of a display panel provided in the present application.

[0046] In one embodiment of the present application, Figure 8 As shown, the second charge generation layer 026 respectively included in the first light-emitting device 02a, the second light-emitting device 02b, and the third light-emitting device 02c is a complete integrated structure.

[0047] In the embodiment of the present application, when the second charge generation layer 026 of different light-emitting devices 02 is a complete integrated structure, one mask plate can be used to complete the preparation of the second charge generation layer 026 of the above-mentioned different light-emitting devices 02, which helps to save preparation costs.

[0048] Fig. 9 A schematic diagram of the structure of a partial film layer of a display panel provided in the present application.

[0049] In one embodiment of the present application, Fig. 9 As shown, the first charge generation layer 024 is located on a side of the second charge generation layer 026 away from the first light emitting layer 022 .

[0050] When the light-emitting device 02 emits light, the first light-emitting layer 022 can receive the carriers generated by the first electrode 021 and the majority carriers in the second charge generation layer 026, and among the carriers generated by the first electrode 021 and the majority carriers in the second charge generation layer 026, one is electrons and the other is holes; the second light-emitting layer 023 can receive the carriers generated by the second electrode 022 and the majority carriers in the first charge generation layer 024, and among the carriers generated by the second electrode 022 and the majority carriers in the first charge generation layer 024, one is electrons and the other is holes.

[0051] In the embodiment of the present application, the first charge generation layer 024 is closer to the second light-emitting layer 023 than the second charge generation layer 026; the second charge generation layer 026 is closer to the first light-emitting layer 022 than the first charge generation layer 024. This arrangement is conducive to improving the efficiency of the majority carriers in the second charge generation layer 026 being transferred to the first light-emitting layer 022, and is also conducive to improving the efficiency of the majority carriers in the first charge generation layer 024 being transferred to the second light-emitting layer 023.

[0052] In one implementation of this embodiment, Fig. 9 As shown, the second charge generation layer 026 of the first light-emitting device 02a and the second charge generation layer 026 of the second light-emitting device 02b are a complete integrated structure, and there is no connection between the second charge generation layer 026 of the second light-emitting device 02b and the second charge generation layer 026 of the third light-emitting device 02c.

[0053] The arrangement scheme in this implementation helps to avoid the transfer of carriers between the second charge generation layer 026 of the third light-emitting device 02c and the second charge generation layer 026 of the second light-emitting device 02b. The arrangement scheme of arranging the second charge generation layer 026 of the first light-emitting device 02a and the second charge generation layer 026 of the second light-emitting device 02b as a complete integrated structure can reduce the process steps required for preparing the second charge generation layer 026, reduce the number of required masks, and reduce the preparation cost.

[0054] Fig.10 A schematic diagram of the structure of a partial film layer of a display panel provided in the present application.

[0055] In one implementation of this embodiment, Fig.10 As shown, the second charge generation layer 026 included in the first light emitting device 02a, the second light emitting device 02b, and the third light emitting device 02c is a complete integrated structure. This implementation can use one mask to complete the preparation of the second charge generation layer 026 of the above different light emitting devices 02, which helps to save preparation costs.

[0056] In addition, compared with the first light-emitting layer 022, the second light-emitting layer 023 is closer to the light-emitting surface of the display panel 10, so the second light-emitting layer 023 emits more obvious light than the first light-emitting layer 022. This is because, compared with the light generated by the first light-emitting layer 022, the light generated by the second light-emitting layer 023 needs to pass through fewer film layers in the process of emitting from the display panel 10, so the light emission of the second light-emitting layer 023 is more obvious. Therefore, compared with the phenomenon of stealing light generated by the first light-emitting layer 022 of the first light-emitting device 02a receiving leakage current, the phenomenon of stealing light generated by the second light-emitting layer 023 of the first light-emitting device 02a receiving leakage current is more obvious. Considering that the first charge generation layer 024 in this embodiment can provide carriers to the second light-emitting layer 023, it is more necessary to pattern the first charge generation layer 024 of the first light-emitting device 02a. That is, the arrangement of this embodiment can reduce the degree of stealing light of the first light-emitting device 02a as much as possible under the premise of reducing the preparation steps of the charge generation layer.

[0057] In one embodiment of the present application, the light emitting color of the first light emitting device 02a is any one of red, green and blue.

[0058] In the embodiment of the present application, the film layer setting method provided in the present application can be implemented according to actual needs to reduce the number of carriers transmitted to the first light-emitting device 02a through the first charge generation layer 024. For example, when leakage protection is required for the light-emitting device 02 with a red light-emitting color (which can be called a red light-emitting device), the red light-emitting device can be used as the first light-emitting device 02a to achieve no connection between the first charge generation layer 024 of the red light-emitting device and the first charge generation layer 024 respectively included in the blue light-emitting device (the light-emitting device 02 with a blue light-emitting color) and the green light-emitting device (the light-emitting device 02 with a green light-emitting color).

[0059] In one embodiment of the present application, the light emitting color of the first light emitting device 02a is red, and the light emitting color of the second light emitting device 02b and the light emitting color of the third light emitting device 02c are blue or green, respectively.

[0060] In this embodiment, in actual situations, the light-emitting device with a red light-emitting color (which may be referred to as a red light-emitting device) has a lower start-up voltage than the light-emitting device with a blue or green light-emitting color, that is, the red light-emitting device is more likely to have a stealth phenomenon. This embodiment helps to reduce or eliminate the stealth phenomenon of the first light-emitting device 02a by patterning the first charge generation layer of the first light-emitting device 02a (red light-emitting device) in a targeted manner, thereby improving the poor display effect caused by the stealth of the red light-emitting device.

[0061] Fig.11 A schematic diagram of a display device provided in the present application.

[0062] The present application provides a display device 20, such as Fig.11 As shown, the display device 20 includes the display panel 10 provided in the above embodiment. The display device 20 may be a mobile phone. In addition, the display device 20 may also be an electronic device such as a computer or a television.

[0063] The leakage phenomenon of the display device 20 provided in the present application is greatly improved, and the manufacturing cost and process difficulty of the display device 20 are reduced.

[0064] In this specification, the same or similar parts between the various embodiments can be referred to each other. In particular, for the device embodiment and the terminal embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiment.

Claims

1. A display panel, characterized in that: It comprises a substrate and a plurality of light emitting devices, wherein the light emitting devices are located on one side of the substrate; The plurality of light emitting devices include a first light emitting device, a second light emitting device and a third light emitting device, each emitting light of different colors; The light emitting device comprises: A first electrode, located on one side of the substrate; A first light-emitting layer is located on a side of the first electrode away from the substrate; A second light-emitting layer is located on a side of the first light-emitting layer away from the first electrode; A first charge generation layer, located between the first light-emitting layer and the second light-emitting layer; Among them, at least part of the first charge generating layer included in the first light-emitting device is not connected to the second light-emitting device and the first charge generating layer included in the third light-emitting device, and the first charge generating layer included in the second light-emitting device and the first charge generating layer included in the third light-emitting device are a complete integrated structure.

2. The display panel according to claim 1, characterized in that: The invention also includes a second charge generation layer located between the first light-emitting layer and the second light-emitting layer.

3. The display panel according to claim 2, characterized in that: In the first charge generation layer and the second charge generation layer, majority carriers of one are electrons, and majority carriers of the other are holes.

4. The display panel according to claim 2, characterized in that: The first charge generation layer is located on a side of the second charge generation layer close to the first light emitting layer.

5. The display panel according to claim 2, characterized in that: The second charge generation layer of the first light-emitting device and the second charge generation layer of the second light-emitting device are a complete integrated structure, and at least part of the second charge generation layer of the second light-emitting device is not connected to the second charge generation layer of the third light-emitting device.

6. The display panel according to claim 2, characterized in that: At least part of the second charge generation layer of the first light emitting device is not connected to the second charge generation layer of the second light emitting device, and the second charge generation layer of the second light emitting device and the second charge generation layer of the third light emitting device are a complete integrated structure.

7. The display panel according to claim 6, characterized in that: The second charge generation layer of the first light emitting device is completely disconnected from the second charge generation layer of the second light emitting device.

8. The display panel according to claim 2, characterized in that: The second charge generation layer respectively included in the first light-emitting device, the second light-emitting device and the third light-emitting device is a complete integrated structure.

9. The display panel according to claim 2, characterized in that: The first charge generation layer is located on a side of the second charge generation layer away from the first light emitting layer.

10. The display panel according to claim 1, characterized in that: The first charge generation layer included in the first light emitting device is completely disconnected from the first charge generation layer included in the second light emitting device and the third light emitting device.

11. The display panel according to claim 1, characterized in that: The light emitting color of the first light emitting device is any one of red, green and blue.

12. The display panel according to claim 11, characterized in that: The light emitting color of the first light emitting device is red, and the light emitting colors of the second light emitting device and the third light emitting device are blue and green, respectively.

13. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-12.

Images