Electrode and preparation method thereof, light-emitting device, and display panel

Abstract

The present disclosure relates to an electrode and a method for preparing the same, a light-emitting device, and a display panel. The electrode includes at least one first transparent conductive film layer and at least one second transparent conductive film layer, and the first transparent conductive film layer and the second transparent conductive film layer are alternately stacked. The refractive index of the second transparent conductive film layer is less than that of the first transparent conductive film layer. By forming a high and low refractive index resonant cavity through transparent conductive film layers with different refractive indices, the overall light-emitting effect of the light-emitting device can be improved. The second transparent conductive film layer is made of the same material as the first transparent conductive film layer, and the transparent conductive films with different refractive indices are made of the same material, which can simplify the preparation process of the electrode.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular, to an electrode and a preparation method thereof, a light-emitting device, and a display panel. Background Art

[0002] Organic light-emitting display panels that use OLED devices as display materials have the advantages of self-luminescence, wide viewing angle, and high contrast. They are widely used in smart products such as mobile phones, televisions, and laptops.

[0003] At present, the structure of OLED devices is relatively complex, including multiple functional layers, which hinders light extraction when light propagates therein. The electrodes of existing light-emitting devices have high light loss and low light extraction efficiency, which affects the light-emitting effect of the light-emitting device.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems of high light loss and low light extraction efficiency of electrodes of existing light-emitting devices, and to provide an electrode and a preparation method thereof, a light-emitting device, and a display panel.

[0006] According to one aspect of the present disclosure, an electrode is provided, comprising at least one first transparent conductive film layer and at least one second transparent conductive film layer, the second transparent conductive film layer and the first transparent conductive film layer are made of the same material, the refractive index of the second transparent conductive film layer is less than the refractive index of the first transparent conductive film layer, and the first transparent conductive film layer and the second transparent conductive film layer are alternately stacked.

[0007] In one embodiment of the present disclosure, the light emitting surface of the electrode is a light scattering surface.

[0008] In one embodiment of the present disclosure, the light scattering surface is configured as an undulating structure with an uneven microstructure.

[0009] In one embodiment of the present disclosure, the refractive index of the first transparent conductive film layer is greater than 2, and the refractive index of the second transparent conductive film layer is less than 1.8.

[0010] In one embodiment of the present disclosure, the first transparent conductive film layer and the second transparent conductive film layer are both indium zinc oxide thin films.

[0011] In one embodiment of the present disclosure, the number of layers of the first transparent conductive film layer and the second transparent conductive film layer is the same.

[0012] In one embodiment of the present disclosure, the thickness of the first transparent conductive film layer and the thickness of the second transparent conductive film layer are both greater than 10 nanometers and less than 50 nanometers.

[0013] In one embodiment of the present disclosure, the electrode is a cathode.

[0014] According to another aspect of the present disclosure, there is provided a method for preparing an electrode, comprising:

[0015] forming at least one first transparent conductive film layer;

[0016] forming at least one second transparent conductive film layer, the second transparent conductive film layer is made of the same material as the first transparent conductive film layer, and the refractive index of the second transparent conductive film layer is smaller than the refractive index of the first transparent conductive film layer;

[0017] The first transparent conductive film layers and the second transparent conductive film layers are alternately stacked.

[0018] In one embodiment of the present disclosure, the method further includes: bombarding the light-emitting surface of the electrode with plasma to form a microstructure with an uneven undulating structure.

[0019] In one embodiment of the present disclosure, the plasma is an argon plasma.

[0020] In one embodiment of the present disclosure, the formation conditions of the first transparent conductive film layer are: power greater than 3kw, gas pressure less than 0.6pa, and reaction gas is Ar; the formation conditions of the second transparent conductive film layer are: power less than 0.5kw, gas pressure greater than 1pa, reaction gases are Ar and O2.

[0021] According to another aspect of the present disclosure, there is provided a light emitting device, comprising:

[0022] The electrode according to one aspect of the present disclosure is a first electrode;

[0023] a second electrode;

[0024] The light-emitting layer is arranged between the first electrode and the second electrode.

[0025] According to still another aspect of the present disclosure, a display panel is provided, comprising the light emitting device according to still another aspect of the present disclosure.

[0026] The electrode disclosed in the present invention includes at least one first transparent conductive film layer and at least one second transparent conductive film layer, and the first transparent conductive film layer and the second transparent conductive film layer are alternately stacked. The refractive index of the second transparent conductive film layer is less than the refractive index of the first transparent conductive film layer. By forming a high and low refractive index resonant cavity through transparent conductive film layers with different refractive indices, the overall light emitting effect of the light emitting device can be improved. The second transparent conductive film layer is made of the same material as the first transparent conductive film layer, and the transparent conductive films with different refractive indices are made of the same material, which can simplify the preparation process of the electrode.

[0027] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the structure of an electrode involved in an embodiment of the present disclosure.

[0030] Figure 2 It is a schematic diagram of the structure of another electrode involved in an embodiment of the present disclosure.

[0031] Figure 3 The present invention is a flow chart of a method for preparing an electrode according to an embodiment of the present invention.

[0032] Figure 4 It is a schematic diagram of the structure of the light-emitting device involved in the embodiment of the present disclosure.

[0033] Figure 5 It is a schematic diagram of the structure of a display panel involved in an embodiment of the present disclosure.

[0034] Figure 6 It is a schematic diagram of the structure of another display panel involved in an embodiment of the present disclosure.

[0035] In the figure: 10-first electrode, 101-first transparent conductive film layer, 102-second transparent conductive film layer, 103-light scattering surface; 20-light-emitting layer, 201-hole injection layer, 202-hole transport layer, 203-electroluminescent layer, 204-electron transport layer, 205-electron injection layer, 21-blue light emitting area, 22-red light emitting area, 23-green light emitting area; 30-second electrode, 40-array substrate. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0037] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0038] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0039] When an electric current flows through an organic light-emitting diode (OLED), the holes generated by the positive electrode and the electrons generated by the negative electrode recombine in the light-emitting layer and release light. Depending on the excitation energy, photons of different energies can be emitted, corresponding to different colors of light. Organic light-emitting display panels that use OLED devices as display materials have the advantages of self-luminescence, wide viewing angle, and high contrast, and are widely used in smart products such as mobile phones, TVs, and laptops.

[0040] The present disclosure provides an electrode. Figure 1 and Figure 2 As shown, the electrode includes at least one first transparent conductive film layer 101 and at least one second transparent conductive film layer 102. The second transparent conductive film layer 102 is made of the same material as the first transparent conductive film layer 101. The refractive index of the second transparent conductive film layer 102 is less than that of the first transparent conductive film layer 101. The first transparent conductive film layer 101 and the second transparent conductive film layer 102 are alternately stacked.

[0041] The refractive index of the second transparent conductive film layer 102 is less than that of the first transparent conductive film layer 101. By forming a high and low refractive index resonant cavity through transparent conductive film layers with different refractive indices, the overall light emitting effect of the light emitting device can be improved. The second transparent conductive film layer 102 and the first transparent conductive film layer 101 are made of the same material. The transparent conductive films with different refractive indices have the same material, which can simplify the preparation process of the electrode.

[0042] like Figure 1As shown, the electrode includes three layers of first transparent conductive film layers 101 and three layers of second transparent conductive film layers 102, the first layer of the first transparent conductive film layer 101 is stacked on the first layer of the second transparent conductive film layer 102, the second layer of the first transparent conductive film layer 101 is stacked on the first layer of the second transparent conductive film layer 102, the second layer of the second transparent conductive film layer 102 is stacked on the second layer of the first transparent conductive film layer 101, the third layer of the first transparent conductive film layer 101 is stacked on the second layer of the second transparent conductive film layer 102, and the third layer of the second transparent conductive film layer 102 is stacked on the third layer of the first transparent conductive film layer 101, that is, the three layers of the first transparent conductive film layer 101 and the three layers of the second transparent conductive film layer 102 are alternately stacked.

[0043] The refractive index of the first transparent conductive film layer 101 is greater than that of the second transparent conductive film layer 102, the refractive index of the first transparent conductive film layer 101 is greater than 2, the refractive index of the second transparent conductive film layer 102 is less than 1.8, the ratio of the refractive index of the first transparent conductive film layer 101 to the refractive index of the second transparent conductive film layer 102 can be 6:5, specifically, the refractive index of the first transparent conductive film layer 101 can be 2.1, and the refractive index of the second transparent conductive film layer 102 can be 1.75. A high and low refractive index resonant cavity is formed by transparent conductive film layers with different refractive indices. The function of the resonant cavity is to select light with a certain frequency and consistent direction for the highest priority amplification, and suppress light of other frequencies and directions, thereby improving the light extraction efficiency of the electrode for light of a certain wavelength, thereby improving the light extraction effect of the light emitting device.

[0044] The first first transparent conductive film layer 101 and the first second transparent conductive film layer 102 constitute a first resonant cavity. The light emitted by the light emitting layer of the light emitting device will interfere with each other after refraction and reflection in the first resonant cavity, generating a microcavity resonance effect, thereby emitting light of a specific wavelength in the light emitted by the light emitting layer, narrowing the emission spectrum, and enhancing the luminous intensity of the light of the specific wavelength. The light of a specific wavelength passing through the first first transparent conductive film layer 101 enters the second first transparent conductive film layer 101, and the second first transparent conductive film layer 101 and the first second transparent conductive film layer 102 constitute a second resonant cavity. The second resonant cavity further narrows the light of a specific wavelength passing through the first first transparent conductive film layer 101, and further enhances the luminous intensity of the light of a specific wavelength.

[0045] It can be understood that the three first transparent conductive film layers 101 and the three second transparent conductive film layers 102 can form five resonant cavities, and the light of a specific wavelength can be enhanced through the five resonant cavities, thereby improving the light emitting effect of the light emitting device.

[0046] The second transparent conductive film layer 102 is made of the same material as the first transparent conductive film layer 101. For example, the second transparent conductive film layer 102 and the first transparent conductive film layer 101 are both made of indium zinc oxide (IZO) thin film. The high and low refractive index resonant cavities are formed by the same material, which simplifies the process and achieves the effect of enhanced light resonance. It should be emphasized that the thickness of the first transparent conductive film layer 101 and the thickness of the second transparent conductive film layer 102 are both greater than 10 nanometers and less than 50 nanometers.

[0047] The light emitting surface of the electrode is the light scattering surface 103. Figure 2 As shown, the microstructure of the light scattering surface 103 is an uneven undulating structure, and the undulating structure can enhance the scattering of the interface and reduce the loss of light at the interface. It can be understood that the two sides of the electrode are the first transparent conductive film layer 101 and the second transparent conductive film layer 102, respectively, and the first transparent conductive film layer 101 and the second transparent conductive film layer 102 can both be light emitting surfaces, so the light scattering surface 103 can be the first transparent conductive film layer 101 located on one side of the electrode, and can also be the surface of the second transparent conductive film layer 102 located on the other side of the electrode. In this embodiment, the light scattering surface 103 is formed on the first transparent conductive film layer 101.

[0048] It should be noted that the number of layers of the first transparent conductive film layer 101 and the second transparent conductive film layer 102 in the electrode can also be set to be different. In one case, the number of layers of the first transparent conductive film layer 101 is one more than the number of layers of the second transparent conductive film layer 102. Alternatively, the electrode can be set such that the number of layers of the second transparent conductive film layer 102 is one more than the number of layers of the first transparent conductive film layer 101.

[0049] Take the case where the number of layers of the second transparent conductive film layer 102 is one more than the number of layers of the first transparent conductive film layer 101 as an example for explanation: the first transparent conductive film layer 101 is set to three layers, and the second transparent conductive film layer 102 is set to four layers. The three layers of the first transparent conductive film layer 101 are arranged between the four layers of the second transparent conductive film layer 102, that is, both sides of the electrode are the second transparent conductive film layer 102, no matter which side of the electrode is used as the light emitting surface, the light scattering surface 103 is located on the surface of the second transparent conductive film layer 102. When the number of layers of the first transparent conductive film layer 101 is one more than the number of layers of the second transparent conductive film layer 102, the light scattering surface 103 is located on the surface of the first transparent conductive film layer 101.

[0050] The electrode may be a first electrode 10. It should be noted that the first electrode 10 here specifically refers to a cathode of the light emitting device.

[0051] The present disclosure provides a method for preparing an electrode. Figure 3 As shown, the method includes:

[0052] Step S10, forming at least one first transparent conductive film layer 101;

[0053] Step S20, forming at least one second transparent conductive film layer 102, wherein the second transparent conductive film layer 102 is made of the same material as the first transparent conductive film layer 101, and the refractive index of the second transparent conductive film layer 102 is smaller than the refractive index of the first transparent conductive film layer 101;

[0054] The first transparent conductive film layers 101 and the second transparent conductive film layers 102 are alternately stacked.

[0055] In the electrode made by this method, the refractive index of the second transparent conductive film layer 102 is less than the refractive index of the first transparent conductive film layer 101. The transparent conductive film layers with different refractive indices form a high and low refractive index resonant cavity, which can improve the overall light-emitting effect of the light-emitting device. The second transparent conductive film layer 102 and the first transparent conductive film layer 101 are made of the same material, and the transparent conductive films with different refractive indices are made of the same material, which can simplify the preparation process of the electrode.

[0056] As mentioned above, the first transparent conductive film layer 101 and the second transparent conductive film layer 102 are both indium zinc oxide thin films. The first transparent conductive film layer 101 and the second transparent conductive film can be prepared by using a sputtering device. Before sputtering, the array substrate after the light-emitting layer is formed is preheated, and the array substrate after the light-emitting layer is formed is preheated to the temperature required for sputtering by a heating plate; the array substrate after the light-emitting layer is formed is sent into a sputtering chamber, and under the action of argon (Ar) introduction and condensation pump exhaust, the sputtering chamber reaches a stable working pressure, direct current is applied to the cathode, and argon (Ar) is ionized; argon ions (Ar+) are incident on the target surface, and target material particles are deposited on the light-emitting layer to alternately form indium zinc oxide thin films.

[0057] In the process of preparing the indium zinc oxide film, the refractive index of the indium zinc oxide film can be changed by adjusting the O2 content, so that the refractive index of the indium zinc oxide film varies between 1.75 and 2.1, and indium zinc oxide films with different refractive indices are alternately formed on the light-emitting layer. The refractive index of the first transparent conductive film layer 101 is greater than 2, and its formation conditions are: power greater than 3kw, gas pressure less than 0.6pa, and reaction gas is Ar; the refractive index of the second transparent conductive film layer 102 is less than 1.8, and its formation conditions are: power less than 0.5kw, gas pressure greater than 1pa, and reaction gas Ar and O2.

[0058] The light-emitting surface of the electrode is bombarded by plasma to form a microstructure with an uneven undulating structure. That is, the surface of the first transparent conductive film layer 101 or the second transparent conductive film layer 102 located on one side of the electrode is bombarded by plasma to form a microstructure with an uneven undulating structure on the surface of the first transparent conductive film layer 101 or the second transparent conductive film layer 102. In this embodiment, the light-emitting surface of the electrode can be located at the first transparent conductive film layer 101, and the plasma can be argon plasma.

[0059] The present disclosure provides a light emitting device. Figure 4 The light-emitting device includes the electrode described in any one of the above items of the present disclosure, which is a first electrode 10; the light-emitting device also includes a second electrode 40 and a light-emitting layer 20, and the light-emitting layer 20 is arranged between the first electrode 10 and the second electrode 40.

[0060] The first electrode 10 may be a cathode, and the second electrode 40 may be an anode. From the second electrode 40 to the first electrode 10, the light-emitting layer 20 includes a hole injection layer 201, a hole transport layer 202, an electroluminescent layer 203, an electron transport layer 204, and an electron injection layer 205, which are sequentially arranged. The electron injection layer 205 is arranged on the first electrode 10, and the hole injection layer 201 is arranged on the second electrode 40. The electrons generated by the first electrode 10 enter the electroluminescent layer 203 through the electron injection layer 205 and the electron transport layer 204, and the holes generated by the second electrode 40 enter the electroluminescent layer 203 through the hole injection layer 201 and the hole transport layer 202, and the electrons and holes emit light after being recombined in the electroluminescent layer 203.

[0061] In the actual manufacturing process of the light-emitting device, the second electrode 40 is formed on the array substrate by sputtering, the light-emitting layer 20 is formed on the second electrode 40 by vacuum evaporation or printing, and the first electrode 10 is formed on the light-emitting layer 20 by sputtering.

[0062] The present disclosure provides a display panel. Figure 5 and Figure 6 As shown, the display panel includes a light emitting device according to any one of the above embodiments of the present disclosure.

[0063] The display panel may further include an array substrate 40, and the light-emitting device is disposed on the array substrate 40. Specifically, the second electrode 40 of the light-emitting device is disposed on the array substrate 40. The hole injection layer 201 with the light-emitting device is disposed on the side of the second electrode 40 away from the array substrate 40. In addition, the display panel may further include a touch control layer. Of course, the display panel may also be provided with other components, such as: a polarizer and a cover plate, which are not listed here one by one. The light-emitting device used in the display panel of the embodiment of the present disclosure is the same as the light-emitting device in the above-mentioned embodiment, and therefore has the same beneficial effects, which are not repeated here.

[0064] For display panels with color shift, such as Micro OLED display panels with color shift at a wide viewing angle or flexible display panels with color shift in the curved display area, the cathode of the embodiment of the present disclosure can be used to replace the existing cathode in the corresponding display area.

[0065] The light-emitting layer 20 of the light-emitting device may include a red light-emitting region 22, a green light-emitting region 23, and a blue light-emitting region 21. The red light-emitting region 22, the green light-emitting region 23, and the blue light-emitting region 21 use different light-emitting materials, and the corresponding colors of the emitted light are also different. The light-emitting regions of different colors are separated from each other by a pixel definition layer. In the actual production process, according to the color deviation, it is first necessary to determine which color of light in the RGB color block needs to be enhanced.

[0066] like Figure 5 As shown, when the corresponding display area of ​​the display panel turns blue, the light-emitting effect of the red light-emitting area 22 is poor, so the first electrode 10 of the light-emitting device on the red light-emitting area 22 adopts the electrode mentioned in any one of the above embodiments of the present disclosure. The positive projection of the electrode mentioned in any one of the above embodiments of the present disclosure on the light-emitting layer 20 covers the red light-emitting area 22, enhancing the luminous intensity of the red light emitted by the red light-emitting area 22, and only the existing electrodes need to be formed on the green light-emitting area 23 and the blue light-emitting area 21, the light-emitting effect of the light-emitting device in the red light-emitting area 22 is enhanced, and the light-emitting effect of the light-emitting device in the green light-emitting area 23 and the blue light-emitting area 21 remains unchanged. The phenomenon that the corresponding display area of ​​the display panel turns blue can be improved or eliminated.

[0067] When the corresponding display area of ​​the display panel emits purple, the luminous effect of the green light emitting area 23 is poor, so the first electrode 10 of the light emitting device on the green light emitting area 23 adopts the electrode mentioned in any one of the above embodiments of the present disclosure. The orthographic projection of the electrode mentioned in any one of the above embodiments of the present disclosure on the light emitting layer 20 covers the green light emitting area 23, enhancing the luminous intensity of the green light emitted by the green light emitting area 23, and only the existing electrodes need to be formed on the red light emitting area 22 and the blue light emitting area 21, the luminous effect of the light emitting device in the green light emitting area 23 is enhanced, while the luminous effect of the light emitting device in the red light emitting area 22 and the blue light emitting area 21 remains unchanged. The phenomenon that the corresponding display area of ​​the display panel emits purple can be improved or eliminated.

[0068] When the corresponding display area of ​​the display panel turns yellow, the luminous effect of the blue light emitting area 21 is poor, so the first electrode 10 of the light emitting device on the blue light emitting area 21 adopts the electrode mentioned in any one of the above embodiments of the present disclosure. The orthographic projection of the electrode mentioned in any one of the above embodiments of the present disclosure on the light emitting layer 20 covers the blue light emitting area 21, enhancing the luminous intensity of the blue light emitted by the blue light emitting area 21, and only the existing electrodes need to be formed on the red light emitting area 22 and the green light emitting area 23, the luminous effect of the light emitting device in the blue light emitting area 21 is enhanced, while the luminous effect of the light emitting device in the red light emitting area 22 and the green light emitting area 23 remains unchanged. The phenomenon of the corresponding display area of ​​the display panel turning yellow can be improved or eliminated.

[0069] It can be understood that when the corresponding display area of ​​the display panel emits red, the first electrode 10 of the light-emitting device on the green light-emitting area 23 and the blue light-emitting area 21 is provided with the electrode mentioned in any one of the above embodiments of the present disclosure. When the corresponding display area of ​​the display panel emits green, the first electrode 10 of the light-emitting device on the red light-emitting area 22 and the blue light-emitting area 21 is provided with the electrode mentioned in any one of the above embodiments of the present disclosure. When the corresponding display area of ​​the display panel emits blue, the first electrode 10 of the light-emitting device on the red light-emitting area 22 and the green light-emitting area 23 is provided with the electrode mentioned in any one of the above embodiments of the present disclosure.

[0070] like Figure 6As shown, in order to simplify the process while improving the color shift, under the premise that the electrode includes indium zinc oxide films with different refractive indices, the electrode can be set to: the indium zinc oxide film included in the light-emitting area that needs to be enhanced is more than the indium zinc oxide film in the light-emitting area that does not need to be enhanced. For example, when the corresponding display area of ​​the display panel is blue, the number of layers of indium zinc oxide film included in the red light-emitting area 22 of the electrode is greater than the number of layers of indium zinc oxide film included in the green light-emitting area 23 and the blue light-emitting area 21. It can be understood that the light-emitting effect of the light-emitting device in the red light-emitting area 22 is enhanced to a higher degree, while the light-emitting effect of the light-emitting device in the green light-emitting area 23 and the blue light-emitting area 21 is enhanced to a lower degree, so the phenomenon of the corresponding display area of ​​the display panel turning blue can be improved or eliminated. As for how many more layers of indium zinc oxide film included in the red light-emitting area 22 of the electrode than the number of layers of indium zinc oxide film included in the green light-emitting area 23 and the blue light-emitting area 21, it can be adjusted according to the actual color shift situation, and no specific limitation is made here. When the corresponding display area of ​​the display panel turns purple or yellow, adaptive adjustment can be made by referring to the structural setting of the electrodes when the display panel turns blue, which will not be described in detail here.

[0071] For the case where the corresponding display area of ​​the display panel emits red, blue or green, taking red as an example, the number of layers of the indium zinc oxide thin film included in the red light emitting area 22 of the electrode can be smaller than the number of layers of the indium zinc oxide thin film included in the green light emitting area 23 and the blue light emitting area 21. For the case where the corresponding display area of ​​the display panel emits blue or green, the setting can be made with reference to the case of red, which will not be repeated here.

[0072] The embodiment of the present disclosure provides a display device, which may include the display panel described in any one of the embodiments of the present disclosure. The specific structure of the display panel has been described in detail above, so it will not be repeated here.

[0073] It should be noted that, in addition to the display panel, the display device also includes other necessary components and components, such as a housing, a circuit board, a power cord, etc. Taking the display as an example, technical personnel in this field can make corresponding supplements based on the specific usage requirements of the display device, which will not be repeated here.

[0074] The display device can be a traditional electronic device, such as a mobile phone, a computer, a television, and a camcorder, or it can be an emerging wearable device, such as a virtual reality device and an augmented reality device, which are not listed here one by one.

[0075] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A display panel, characterized in that: A light emitting device is included, wherein the light emitting device includes: An electrode, wherein the electrode comprises at least one first transparent conductive film layer and at least one second transparent conductive film layer, the second transparent conductive film layer is made of the same material as the first transparent conductive film layer, the refractive index of the second transparent conductive film layer is smaller than the refractive index of the first transparent conductive film layer, the first transparent conductive film layer and the second transparent conductive film layer are alternately stacked, and the electrode is a first electrode; a second electrode; a light-emitting layer, wherein the light-emitting layer is disposed between the first electrode and the second electrode; The first transparent conductive film layer and the second transparent conductive film layer are both indium zinc oxide films, the refractive index of the first transparent conductive film layer is greater than 2, the refractive index of the second transparent conductive film layer is less than 1.8, the thickness of the first transparent conductive film layer and the thickness of the second transparent conductive film layer are both greater than 10 nanometers and less than 50 nanometers, and the electrode is configured as follows: the indium zinc oxide film included in the light-emitting area where the light-emitting layer needs to be enhanced is greater than the indium zinc oxide film included in the light-emitting area where no enhancement is required.

2. The display panel according to claim 1, characterized in that: The light emitting surface of the electrode is a light scattering surface.

3. The display panel according to claim 2, characterized in that: The microstructure of the light scattering surface is an uneven undulating structure.

4. The display panel according to claim 1, characterized in that: The first transparent conductive film layer and the second transparent conductive film layer have the same number of layers.

5. The display panel according to claim 1, characterized in that: The electrode is a cathode.

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