Solar cover plate and display device

Abstract

The utility model discloses a solar energy cover plate, comprising a transparent cover plate, a PV pattern layer and a transparent medium layer, the PV pattern layer comprises a transparent front electrode layer arranged on the transparent cover plate; the PV photovoltaic layer is arranged on the transparent front electrode layer; the metal back electrode layer is arranged on the PV photovoltaic layer; the transparent dielectric layer is arranged on the metal back electrode layer, and the transparent dielectric layer is a thin film with a light trapping microstructure and is used for reducing the surface reflectivity of the metal back electrode layer, so that the reflectivity of the surface of one side of the back electrode of the solar cover plate to visible light is lower than 30%. According to the solar cover plate, the transparent dielectric layer is arranged on the metal back electrode layer, and the surface reflectivity of the metal back electrode layer is reduced through the transparent dielectric layer, so that the color cast problem of a display screen after the solar cover plate is carried is solved. The utility model further discloses a display device which comprises the solar cover plate.

Description

Technical Field

[0001] The utility model relates to solar cell technology, in particular to a solar cover plate and a display device. Background Art

[0002] As consumers become more and more dependent on various types of wearable, portable, and handheld electronic devices, the problem of battery capacity has become increasingly prominent. Technical solutions such as high capacity of electronic device batteries have attracted more and more attention from R&D personnel. In order to better implement the above technical solutions, R&D personnel have realized that it is necessary to equip electronic devices with sustainable power generation devices, and solar cells for photoelectric power generation are a better choice.

[0003] In the early scheme, in order not to affect the display effect of electronic devices, solar cells were generally made in the peripheral area of ​​electronic devices, surrounding the display area of ​​electronic devices; later, in order to further improve the power generation efficiency, solar cells began to be made in the display area of ​​electronic devices with extremely fine line width PV grid patterns. How to reduce the impact of PV grid patterns on display screens has always been an urgent problem to be solved in this industry.

[0004] A Chinese patent with patent number 201380046612.8 discloses a device for improving the quality of an image covered by a semi-transparent photovoltaic film, which includes an image on the one hand and a photovoltaic panel arranged between the image and an observer on the other hand, the photovoltaic panel consisting of a luminous transparent area and an area covered by a photovoltaic unit, one of the two faces of the photovoltaic unit facing the image, and the face of the photovoltaic unit turned toward the image is reflective so that a portion of the light emitted by the image is reflected toward the image and its luminosity seen by the observer through the transparent area is increased so as to compensate for the shading effect caused by the photovoltaic unit.

[0005] The above patent increases the reflectivity of the PV grid pattern to reflect the light emitted by the display back to the display. Although it can improve the brightness of the display, the line width design specification of the PV grid pattern (opaque) in the solar cell is generally 5~30μm, preferably 10~15μm, while the width of a pixel (including R, G, B three-color sub-pixels) of color displays such as LCD or OLED is about 100~150μm, of which the single design width of the R / G / B sub-pixel is generally 30~50μm, preferably 40~45μm, and the spacing between adjacent sub-pixels is generally only 3~5μm. In this case, Figure 1As shown, when a PV grid pattern is set on the solar cell above the display, if the PV grid pattern is located just above a sub-pixel, the metal back electrode in the PV grid pattern will reflect the light of the sub-pixel below it to other adjacent sub-pixels, causing interference between the light of the sub-pixel and the light of other adjacent sub-pixels, resulting in color deviation problems. Utility Model Content

[0006] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a solar cover, which arranges a transparent medium layer on the metal back electrode layer, and utilizes the transparent medium layer to reduce the surface reflectivity of the metal back electrode layer, so as to improve the color deviation problem of the display screen after being equipped with the solar cover.

[0007] The utility model also provides a display device, comprising the above-mentioned solar cover plate.

[0008] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0009] A solar cover plate comprises a transparent cover plate, a PV pattern layer and a transparent medium layer, wherein the PV pattern layer comprises:

[0010] A transparent front electrode layer is disposed on the transparent cover plate;

[0011] A PV photovoltaic layer, disposed on the transparent front electrode layer;

[0012] A metal back electrode layer, disposed on the PV photovoltaic layer;

[0013] The transparent medium layer is arranged on the metal back electrode layer. The transparent medium layer is a thin film with a light-trapping microstructure, which is used to reduce the surface reflectivity of the metal back electrode layer, so that the reflectivity of the back electrode side surface of the solar cover to visible light is less than 30%.

[0014] Furthermore, the transparent medium layer is an amorphous ITO film or a crystalline AZO film having a light trapping microstructure.

[0015] Furthermore, when the transparent medium layer is made of an amorphous ITO film, the thickness of the amorphous ITO film ranges from 50 nm to 300 nm.

[0016] Furthermore, when the transparent medium layer is made of a crystalline AZO film, the thickness of the crystalline AZO film ranges from 300 nm to 1200 nm.

[0017] Furthermore, the solar cover comprises a display area and a peripheral area, and the PV pattern layer is arranged at least in the display area in a PV grid pattern.

[0018] Furthermore, a light trapping microstructure is formed on the surface of the transparent front electrode layer facing the PV photovoltaic layer.

[0019] Furthermore, the thickness of the metal back electrode layer is less than 500 nm.

[0020] Furthermore, it also includes a first insulating medium layer, which is arranged between the metal back electrode layer and the transparent medium layer.

[0021] Furthermore, it also includes a second insulating medium layer, and the second insulating medium layer is arranged on the transparent medium layer.

[0022] A display device comprises a display screen and the above-mentioned solar cover plate, wherein the solar cover plate is arranged on the display side of the display screen.

[0023] The utility model has the following beneficial effects:

[0024] The solar cover of this patent arranges the transparent medium layer on the metal back electrode layer of the PV pattern layer, and uses the transparent medium layer to reduce the surface reflectivity of the metal back electrode layer. After being mounted on the display screen, when the light emitted by the display screen propagates to the surface of the transparent medium layer, due to the difference in refractive index between the transparent medium layer and the outside world (air or OCA glue), part of the light will be reflected back to the display screen by the surface of the transparent medium layer where no light trapping microstructure is formed, and part of the light will enter the transparent medium layer. When the light entering the transparent medium layer propagates to the metal back electrode layer, it will be re-reflected back into the transparent medium layer by the metal back electrode layer. When the light reflected by the metal back electrode layer propagates to the surface of the transparent medium layer, due to the difference in refractive index between the transparent medium layer and the outside world (air or OCA glue), part of the light will be re-reflected back into the transparent medium layer by the surface of the transparent medium layer, and part of the light will leave the transparent medium layer and return to the display screen, thereby affecting the color purity of adjacent sub-pixels. The utility model adopts a processing method of micro-etching the surface of the transparent medium layer, forming a light-trapping microstructure in the form of an inverted trapezoid or a multi-faceted pyramid or a groove of varying depths on the surface of the transparent medium layer, so that the light emitted from the display to the surface of the transparent medium layer will be repeatedly reflected and / or refracted back into the transparent medium layer after the light is first incident on the light-trapping microstructure, and it is difficult to be emitted from the transparent medium layer again even after being reflected by the metal back electrode layer, thereby greatly reducing the amount of light reflected back to the display screen and improving the color deviation problem of the display screen after the solar cover is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the color shift principle of existing solar cover panels.

[0026] Figure 2 A schematic diagram of stacking solar cover plates provided by the utility model.

[0027] Figure 3 This is a plan view of the solar cover provided by the utility model.

[0028] Figure 4 A schematic diagram of stacking another solar cover provided by the utility model.

[0029] Figure 5 A schematic diagram of stacking another solar cover provided by the utility model.

[0030] Figure 6 A schematic diagram of stacking another solar cover provided by the utility model.

[0031] Figure 7 A schematic diagram of stacking another solar cover provided by the utility model.

[0032] Figure 8 A schematic diagram of stacking another solar cover provided by the utility model.

[0033] Fig. 9 A schematic diagram of stacking another solar cover provided by the utility model.

[0034] Fig.10 This is a SEM picture of the light-trapping microstructure of the amorphous ITO film provided by the utility model.

[0035] Fig.11 and Fig.12 These are all SEM images of the light trapping microstructure of the crystalline AZO film provided by the present invention. DETAILED DESCRIPTION

[0036] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Embodiment 1

[0041] like Figure 2 As shown, a solar cover comprises a transparent cover 100, a PV pattern layer 200 and a transparent medium layer 300, wherein the PV pattern layer 200 comprises:

[0042] A transparent front electrode layer 201 is disposed on the transparent cover plate 100;

[0043] PV photovoltaic layer 202, disposed on the transparent front electrode layer 201;

[0044] A metal back electrode layer 203 is disposed on the PV photovoltaic layer 202;

[0045] The transparent medium layer 300 is disposed on the metal back electrode layer 203. The transparent medium layer 300 is a thin film with a light trapping microstructure, which is used to reduce the surface reflectivity of the metal back electrode layer 203, so that the reflectivity of the back electrode side surface of the solar cover to visible light is less than 30%.

[0046] The solar cover of the present patent arranges the transparent medium layer 300 on the metal back electrode layer 203 of the PV pattern layer 200, and uses the transparent medium layer 300 to reduce the surface reflectivity of the metal back electrode layer 203. After being mounted on a display screen, when the light emitted by the display screen propagates to the surface of the transparent medium layer 300, due to the difference in refractive index between the transparent medium layer 300 and the outside world (air or OCA glue), part of the light will be reflected back to the display screen by the transparent medium layer 300, and part of the light will enter the transparent medium layer 300. When the light entering the transparent medium layer 300 propagates to the metal back electrode layer 203, it will be reflected back to the transparent medium layer 300 by the metal back electrode layer 203. When the light reflected by the metal back electrode layer 203 propagates to the surface of the transparent medium layer 300, Due to the difference in refractive index between the transparent medium layer 300 and the outside world (air or OCA glue), part of the light will be reflected back to the display screen by the surface of the transparent medium layer 300 where no light-trapping microstructure is formed, while part of the light will enter the transparent medium layer. When the light entering the transparent medium layer 300 propagates to the metal back electrode layer 203, it will be re-reflected back into the transparent medium layer 300 by the metal back electrode layer 203. When the light reflected by the metal back electrode layer 203 propagates to the surface of the transparent medium layer 300, due to the difference in refractive index between the transparent medium layer 300 and the outside world (air or OCA glue), part of the light will be re-reflected back into the transparent medium layer 300 by the surface of the transparent medium layer 300, and part of the light will leave the transparent medium layer 300 and return to the display screen, affecting the color purity of adjacent sub-pixels. The utility model adopts a method of micro-etching the surface of the transparent medium layer 300 to form a light-trapping microstructure in the form of an inverted trapezoid or a multi-faceted pyramid or a groove of varying depths on the surface of the transparent medium layer 300, so that the light emitted from the display to the surface of the transparent medium layer 300 will be repeatedly refracted and / or reflected back into the transparent medium layer 300 after the light is first incident on the light-trapping microstructure. Even if some light passes through the transparent medium layer 300 to reach the metal back electrode layer 203, the light reflected back by the metal back electrode layer 203 will hardly be emitted from the transparent medium layer 300 again, thereby greatly reducing the amount of light reflected back to the display screen and improving the color deviation problem of the display screen after the solar cover is installed.

[0047] The metal back electrode layer 203 may be, but is not limited to, a single-layer electrode structure, such as a single metal such as aluminum, molybdenum, silver, chromium, copper, titanium, or an alloy metal containing the aforementioned single metal, or a multi-layer electrode structure, such as a multi-layer electrode structure composed of a single metal such as aluminum, molybdenum, silver, chromium, copper, titanium, or an alloy metal containing the aforementioned single metal, such as aluminum-molybdenum, molybdenum-aluminum, or molybdenum-aluminum-molybdenum.

[0048] The transparent medium layer 300 may be, but is not limited to, an amorphous ITO film or a crystalline AZO film having a light trapping microstructure. Since amorphous ITO or crystalline AZO has a certain conductivity, using an amorphous ITO film or a crystalline AZO film as the transparent medium layer 300 and setting it on the metal back electrode layer 203 is equivalent to connecting the amorphous ITO film or the crystalline AZO film in parallel with the metal back electrode layer 203, which can reduce the resistance value of the metal back electrode layer 203 and the amorphous ITO film or the crystalline AZO film as a whole, thereby improving the charge collection and transmission efficiency of the PV pattern layer 200.

[0049] If the transparent dielectric layer 300 is made of an amorphous ITO film or a crystalline AZO film, the transparent dielectric layer 300 can have a pattern with the same shape as the metal back electrode layer 203, but the line width of the transparent dielectric layer 300 cannot exceed the line width of the metal back electrode layer 203 to prevent the transparent dielectric layer 300 from contacting the transparent front electrode layer 201 from the side and causing a short circuit between the metal back electrode layer 203 and the transparent front electrode layer 201.

[0050] When the transparent medium layer 300 is made of different materials, the corresponding thickness is different. When an amorphous ITO film is selected as the transparent medium layer 300, the film thickness range is set between 50nm-300nm; when a crystalline AZO film is selected as the transparent medium layer 300, the film thickness range is set between 300nm~1200nm. Both the amorphous ITO film and the crystalline AZO film can be patterned with an organic acid etching solution. After the PV grid pattern is formed, it is further micro-etched only on the surface of the amorphous ITO film or the crystalline AZO film by a low etching rate process (including but not limited to one or a combination of low concentration or low etching temperature or short etching time). Finally, a light-trapping microstructure in the form of an inverted trapezoid or a multi-faceted pyramid or a groove of varying depths is formed on the surface of the amorphous ITO film or the crystalline AZO film. An example of a light-trapping microstructure of an amorphous ITO film is shown in Fig.10 , two examples of light trapping microstructures of crystalline AZO films are shown in Fig.11 and Fig.12 The light-trapping microstructures of the two transparent materials include but are not limited to the types shown in the figure.

[0051] like Figure 3 As shown, the solar cover includes a display area 101 and a peripheral area 102 ( Figure 3 The marking numbers in the figure have been modified), the PV pattern layer 200 is arranged at least in the display area 101, and the PV pattern layer 200 arranged in the display area 101 adopts a PV grid pattern 210.

[0052] The PV grid pattern 210 includes a plurality of first grid lines 211 and a plurality of second grid lines 212. The first grid lines 211 extend along a first direction and are parallel and juxtaposed along a second direction, and the second grid lines 212 extend along a second direction and are parallel and juxtaposed along the first direction. The first grid lines 211 and the plurality of second grid lines 212 are interlaced to form a grid shape.

[0053] The line width design specification of the PV grid pattern 210 is 5-30 μm, preferably 10-15 μm.

[0054] Of course, the PV pattern layer 210 may also be arranged in the peripheral area 102 , and the PV pattern layer 210 arranged in the peripheral area 102 has no special requirements on the shape.

[0055] The transparent front electrode layer 201 may be made of, but is not limited to, TCO material, such as AZO (aluminum-doped zinc oxide).

[0056] When the thickness of the metal back electrode layer 203 is less than 500nm and the transparent medium layer 300 is made of an amorphous ITO film or a crystalline AZO film having a light-trapping microstructure on the surface, the overall reflectivity of the metal back electrode layer 203 and the transparent medium layer 300 in the visible light band (360nm-740nm) is less than 30%.

[0057] The PV photovoltaic layer of this patent includes but is not limited to solar cells made using a single-layer substrate such as amorphous silicon thin-film solar cells, gallium arsenide solar cells, cadmium sulfide CdS or cadmium telluride solar cells or CIGS, as well as devices such as OPV (organic solar cells) and PSC (perovskite solar cells) made through TFE packaging process.

[0058] A light-trapping microstructure is formed on the surface of the transparent front electrode layer 201 facing the PV photovoltaic layer 202. The light-trapping microstructure is a series of pyramid-like optical microstructures distributed on the surface of the transparent front electrode layer 201 facing the PV photovoltaic layer 202, which can be formed by a texturing process. After the ambient light is incident from one side of the transparent cover plate 100, it passes through the transparent cover plate 100 and enters the transparent front electrode layer 201, and then enters the PV photovoltaic layer 202. When the ambient light passes through the light-trapping microstructure, the ambient light can be reflected multiple times on the surface of the light-trapping microstructure, so that the ambient light that is not absorbed by the PV photovoltaic layer 202 is reflected back to the PV photovoltaic layer 202 for re-absorption, thereby improving the utilization rate of the ambient light.

[0059] Embodiment 2

[0060] As an optimization solution of the first embodiment, in this embodiment, if Figure 4 and 5 As shown, the solar cover further includes a first insulating medium layer 400 , and the first insulating medium layer 400 is disposed between the metal back electrode layer 203 and the transparent medium layer 300 .

[0061] In this embodiment, the first insulating dielectric layer 400 is arranged between the metal back electrode layer 203 and the transparent dielectric layer 300 to completely separate the metal back electrode layer 203 from the transparent dielectric layer 300. In addition to protecting the surface of the metal back electrode layer 203 to prevent the metal back electrode layer 203 from being oxidized and corroded by water vapor, the low reflectivity of the first insulating dielectric layer 400 can also be utilized to reduce the amount of light reflected by the metal back electrode layer 203 back into the transparent dielectric layer 300, so as to further reduce the surface reflectivity of the metal back electrode layer 203.

[0062] like Figure 4 As shown, the first insulating dielectric layer 400 can be etched to form an insulating pattern having the same shape as the metal back electrode layer 203 to ensure high transmittance in the non-power generation area, but its pattern line width must be greater than the pattern line widths of the transparent front electrode layer 201, the PV photovoltaic layer 202 and the metal back electrode layer 203, so that the first insulating dielectric layer 400 completely wraps the sides of the transparent front electrode layer 201, the PV photovoltaic layer 202 and the metal back electrode layer 203; Figure 5 As shown, the first insulating dielectric layer 400 can also be used to cover the entire display area of ​​the solar cover to avoid other poor appearance during the patterning process of the first insulating dielectric layer 400 (such as poor appearance caused by the exposure process - MURA, etc.), and effectively improve the chemical resistance and reliability of the transparent front electrode layer 201 and the metal back electrode layer 203.

[0063] The first insulating dielectric layer 400 may be an organic insulating material, such as acrylic resin, polyimide, benzocyclobutene resin, polyamide resin, epoxy resin, etc., or the first insulating dielectric layer 400 may be an inorganic insulating material, such as silicon dioxide, silicon nitride, silicon oxynitride, etc.

[0064] Embodiment 3

[0065] As an optimization solution of the first embodiment, in this embodiment, if Figure 6 and 7 As shown, the solar cover further includes a second insulating medium layer 500 , and the second insulating medium layer 500 is disposed on the transparent medium layer 300 .

[0066] In this embodiment, the second insulating dielectric layer 500 is arranged on the transparent dielectric layer 300 to completely isolate the transparent dielectric layer 300 from the outside world. In addition to protecting the surface of the transparent dielectric layer 300 to prevent the amorphous ITO film or crystalline AZO film with a light-trapping microstructure used as the transparent dielectric layer 300 from being affected by external electrical components, the low reflectivity of the second insulating dielectric layer 500 can also be used to reduce the surface reflectivity of the transparent dielectric layer 300, so as to further reduce the surface reflectivity of the metal back electrode layer 203.

[0067] like Figure 6 As shown, the second insulating dielectric layer 500 can be etched to form an insulating pattern having the same shape as the metal back electrode layer 203 to ensure high transmittance in the non-power generation area, and its pattern line width is slightly larger than the pattern line widths of the transparent front electrode layer 201, the PV photovoltaic layer 202 and the metal back electrode layer 203 to wrap and cover the sides of the transparent front electrode layer 201, the PV photovoltaic layer 202 and the metal back electrode layer 203; Figure 7 As shown, the second insulating dielectric layer 500 can also be used to cover the entire display area of ​​the solar cover to avoid other poor appearance during the patterning process of the second insulating dielectric layer 500 (such as poor appearance caused by the exposure process - MURA, etc.), and effectively improve the chemical resistance and reliability of the transparent front electrode layer 201 and the metal back electrode layer 203.

[0068] The second insulating dielectric layer 500 may be an organic insulating material, such as acrylic resin, polyimide, benzocyclobutene resin, polyamide resin, epoxy resin, etc., or the second insulating dielectric layer 500 may be an inorganic insulating material, such as silicon dioxide, silicon nitride, silicon oxynitride, etc.

[0069] Embodiment 4

[0070] As an optimization solution of the first embodiment, in this embodiment, if Figure 8 and 9 As shown, the solar cover also includes a first insulating medium layer 400 and a second insulating medium layer 500 , wherein the first insulating medium layer 400 is disposed between the metal back electrode layer 203 and the transparent medium layer 300 , and the second insulating medium layer 500 is disposed on the transparent medium layer 300 .

[0071] The specific structure, material and technical effect of the first insulating dielectric layer 400 and the second insulating dielectric layer 500 of this embodiment may refer to the second embodiment and the third embodiment.

[0072] Embodiment 5

[0073] A display device comprises a display screen and the above-mentioned solar cover, wherein the solar cover is arranged on the display side of the display screen, and the solar cover and the display screen are fully bonded by OCA glue, or the solar cover and the display screen are partially bonded by frame glue on the periphery (an air gap is left between the solar cover and the display screen).

[0074] The display screen can be an LCD screen or an OLED screen, and is not limited to transmissive, semi-transmissive and fully reflective types of displays. As long as it is a device that displays a color image in a mixed color manner through sub-pixels of different colors (including but not limited to colorization based on the principle of three primary colors or their complementary colors); the display screen and the solar cover can be fully bonded with each other using glue or film that covers the entire surface, or with glue or film in the shape of a "U" character to achieve frame bonding. After bonding, the display area of ​​the display screen overlaps with the display area of ​​the solar cover.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A solar cover plate, comprising a transparent cover plate, a PV pattern layer and a transparent medium layer, wherein the PV pattern layer comprises: A transparent front electrode layer is disposed on the transparent cover plate; A PV photovoltaic layer, disposed on the transparent front electrode layer; A metal back electrode layer, disposed on the PV photovoltaic layer; The transparent medium layer is arranged on the metal back electrode layer, and is characterized in that the transparent medium layer is a thin film with a light-trapping microstructure, which is used to reduce the surface reflectivity of the metal back electrode layer, so that the reflectivity of the surface of the back electrode side of the solar cover to visible light is less than 30%.

2. The solar cover according to claim 1, characterized in that: The transparent medium layer is an amorphous ITO film or a crystalline AZO film having a light trapping microstructure.

3. The solar cover according to claim 2, characterized in that: When the transparent medium layer is made of an amorphous ITO film, the thickness of the amorphous ITO film ranges from 50 nm to 300 nm.

4. The solar cover according to claim 2, characterized in that: When the transparent medium layer is made of a crystalline AZO film, the thickness of the crystalline AZO film ranges from 300 nm to 1200 nm.

5. The solar cover according to claim 1, characterized in that: The solar cover comprises a display area and a peripheral area, and the PV pattern layer is arranged at least in the display area in a PV grid pattern.

6. The solar cover according to claim 1, characterized in that: A light trapping microstructure is formed on the surface of the transparent front electrode layer facing the PV photovoltaic layer.

7. The solar cover according to claim 1, characterized in that: The thickness of the metal back electrode layer is less than 500 nm.

8. The solar cover according to claim 1, characterized in that: It also includes a first insulating medium layer, which is arranged between the metal back electrode layer and the transparent medium layer.

9. The solar cover according to claim 1, characterized in that: It also includes a second insulating medium layer, which is arranged on the transparent medium layer.

10. A display device, characterized in that: It comprises a display screen and the solar cover plate described in any one of claims 1 to 9, wherein the solar cover plate is arranged on the display side of the display screen.

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