Solar powered electronic price tag, solar powered electronic display device and method of manufacturing the same

Abstract

The application discloses a solar electronic price tag, a solar electronic display device and a preparation method thereof. The solar electronic price tag comprises a substrate with a first surface; a solar cell layer located on the first surface; an electronic price tag layer located on the first surface, the electronic price tag layer and the solar cell layer form a current loop, the vertical projection of the electronic price tag layer on the substrate and the vertical projection of the solar cell layer on the substrate do not overlap; and a cover plate, the cover plate cooperates with the substrate to seal the solar cell layer and the electronic price tag layer to realize the common encapsulation of the solar cell layer and the electronic price tag layer, and the incident light can be incident on the solar cell layer through the cover plate. The application realizes the common encapsulation of the solar cell layer and the electronic price tag layer or the electronic display layer in the solar cell manufacturing, and the solar electronic price tag or the solar electronic display device is completed at the same time when the solar cell manufacturing is completed, the structure is simple, and the packaging cost and the thickness of the solar electronic price tag can be reduced.

Description

Technical Field

[0001] This invention relates to the field of packaging technology, and in particular to a solar electronic price tag, a solar electronic display device, and a method for preparing the same. Background Technology

[0002] Currently, electronic shelf labels are typically powered by button batteries or lithium batteries. Button batteries are generally disposable and require frequent replacements, which increases costs. Rechargeable batteries such as lithium batteries also require frequent charging or replacement of the electronic shelf labels, thus increasing labor maintenance costs. Furthermore, since these batteries have a certain thickness, using them as a power source increases the overall thickness of the electronic shelf labels. Summary of the Invention

[0003] This invention provides a solar electronic price tag, a solar electronic display device, and a method for manufacturing the same, so as to achieve co-encapsulation of the solar cell layer and the electronic price tag layer, and incident light can be incident on the solar cell layer through the cover plate. The structure is simple and can reduce the encapsulation cost and the thickness of the solar electronic price tag.

[0004] According to one aspect of the present invention, a solar-powered electronic shelf label is provided, comprising: The substrate has a first surface; The solar cell layer is located on the first surface; An electronic price tag layer is located on the first surface. The electronic price tag layer and the solar cell layer form a current loop. The vertical projection of the electronic price tag layer on the substrate and the vertical projection of the solar cell layer on the substrate do not overlap. A cover plate is provided, which cooperates with the substrate to seal the solar cell layer and the electronic price tag layer, thereby achieving co-encapsulation of the solar cell layer and the electronic price tag layer. Incident light can be incident on the solar cell layer through the cover plate.

[0005] Optionally, the electronic price tag layer and the solar cell layer can be installed on the same layer. Along the first direction, the electronic price tag layer is located on one side of the solar cell layer; or, the solar cell layer is arranged around the electronic price tag layer. The first direction is perpendicular to the second direction in which the substrate points to the cover plate.

[0006] Optionally, the solar cell layer includes at least a first conductive layer, a functional layer, and a second conductive layer stacked sequentially; the second conductive layer is located on the side of the first conductive layer away from the substrate; the functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, the second buffer layer being located on the side of the first buffer layer away from the first conductive layer; the solar cell layer also includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the functional layer, and a second conductive layer is disposed within the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

[0007] Optionally, the solar cell layer is a perovskite solar cell layer, and the solar cell layer includes at least a first conductive layer, a perovskite functional layer and a second conductive layer stacked in sequence; the second conductive layer is located on the side of the first conductive layer away from the substrate; the perovskite functional layer includes a first buffer layer, a perovskite light-absorbing layer and a second buffer layer stacked in sequence, and the second buffer layer is located on the side of the first buffer layer away from the first conductive layer. The perovskite solar cell layer also includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the perovskite functional layer, and a second conductive layer is disposed in the second groove and connected to the first conductive layer; the third groove penetrates at least the second conductive layer.

[0008] Optionally, the functional layer covers part of the first conductive layer, and the second conductive layer covers the functional layer; The solar-powered electronic price tag also includes a conductive structure; the conductive structure is located in the area of ​​the first conductive layer that is not covered by the functional layer; the conductive structure is used to couple the solar cell layer and the electronic price tag layer to form a current loop.

[0009] Optionally, the electronic price tag layer includes a circuit board and an electronic screen; the electronic screen is mounted on the circuit board; the circuit board is located on the side of the electronic screen away from the substrate; A first electrode and a second electrode are provided on the circuit board. The first electrode on the circuit board is electrically connected to the first electrode of the solar cell layer through a conductive structure, and the second electrode on the circuit board is electrically connected to the second electrode of the solar cell layer through a conductive structure.

[0010] Optionally, the material of the conductive structure includes any one of conductive tape, aluminum strip, aluminum bar, and conductive film, and / or the material of the substrate and cover plate includes glass made of silicon oxide.

[0011] According to another aspect of the present invention, a method for preparing a solar-powered electronic shelf label is provided, comprising: A substrate is provided, the substrate having a first surface; A solar cell layer and an electronic price tag layer are formed on the first surface of the substrate. The electronic price tag layer and the solar cell layer form a current loop. The vertical projection of the electronic price tag layer on the substrate does not overlap with the vertical projection of the solar cell layer on the substrate. A cover plate is formed, which cooperates with the substrate to seal the solar cell layer and the electronic label layer, so that the solar cell layer and the electronic label layer are jointly encapsulated, and incident light can be incident on the solar cell layer through the cover plate.

[0012] Optionally, a solar cell layer and an electronic price tag layer are formed on the first surface of the substrate, including: A solar cell transition layer is formed on the first surface of the substrate; Remove the preset area of ​​the solar cell transition layer to form a solar cell layer, wherein the preset area and the vertical projection of the solar cell layer on the first surface do not overlap; An electronic price tag layer is formed within a preset area, which then becomes electrically connected to the solar cell layer.

[0013] Optionally, a solar cell transition layer is formed on the first surface of the substrate, including: A first conductive material layer is formed on one side of the substrate, and the first conductive material layer covers the substrate; A first groove is formed on a first conductive material layer, and the first groove penetrates the first conductive material layer; A functional material layer is formed on the side of the first conductive material layer away from the substrate, and the functional material layer covers the first conductive material layer and the first groove. A second groove is formed on the functional material layer, and the second groove penetrates the functional material layer; A second conductive material layer is formed on the side of the functional material layer away from the substrate, and the second conductive material layer covers the functional material layer and fills the second groove. A third groove is formed on the second conductive material layer, and the third groove at least penetrates the second conductive material layer; Removing a predetermined area of ​​the solar cell transition layer to form a solar cell layer includes: The first conductive material layer, the functional material layer, and the second conductive material layer are processed to expose a portion of the substrate, forming a first conductive layer, a functional material sublayer, and a second conductive material sublayer; the functional material sublayer and the second conductive material sublayer are processed to form a functional layer and a second conductive layer, forming a solar cell layer. The functional layer covers a portion of the first conductive layer, and the second conductive layer covers the functional layer. The functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, with the second buffer layer located on the side of the first buffer layer away from the first conductive layer; or... The functional material layer and the second conductive material layer are processed to form a functional layer and a second conductive layer; the first conductive material layer is processed to form a first conductive layer, forming a solar cell layer. The functional layer covers part of the first conductive layer, and the second conductive layer covers the functional layer. The functional layer includes a first buffer layer, a light-absorbing layer and a second buffer layer stacked sequentially. The second buffer layer is located on the side of the first buffer layer away from the first conductive layer.

[0014] Optionally, after forming the solar cell layer, the following may also be included: A conductive structure is formed on the side of the first conductive layer away from the substrate. The conductive structure is located in the part of the first conductive layer that is not covered by the functional layer. The conductive structure is used to couple the solar cell layer and the electronic tag layer to form a current loop.

[0015] Optionally, after forming the cover plate, it includes: The substrate and cover are packaged using laser packaging technology, film packaging technology, or sealing material packaging technology.

[0016] According to another aspect of the present invention, a solar-powered electronic display device is provided, comprising: A substrate has a first surface, the first surface having a first region and a second region, the first region and the second region being different; A solar cell layer, located in a first region of the first surface; An electronic display layer is located in the second region of the first surface, and the electronic display layer and the solar cell layer form a current loop; A cover plate is provided, which cooperates with the substrate to seal the solar cell layer and the electronic display layer so as to achieve co-encapsulation of the solar cell layer and the electronic display layer, and incident light can be incident on the solar cell layer through the cover plate.

[0017] Optionally, the electronic display layer and the solar cell layer are disposed on the same layer; the first region and the second region are non-overlapping regions of the first surface; Along the first direction, the electronic display layer is located on one side of the solar cell layer; or, the solar cell layer is arranged around the electronic display layer. The first direction is perpendicular to the second direction in which the substrate points to the cover plate.

[0018] Optionally, the solar cell layer includes at least a first conductive layer, a functional layer, and a second conductive layer stacked sequentially; the second conductive layer is located on the side of the first conductive layer away from the substrate; the functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, the second buffer layer being located on the side of the first buffer layer away from the first conductive layer; the solar cell layer also includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the functional layer, and a second conductive layer is disposed within the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

[0019] Optionally, the solar cell layer is a perovskite solar cell layer, and the solar cell layer includes at least a first conductive layer, a perovskite functional layer and a second conductive layer stacked in sequence; the second conductive layer is located on the side of the first conductive layer away from the substrate; the perovskite functional layer includes a first buffer layer, a perovskite light-absorbing layer and a second buffer layer stacked in sequence, and the second buffer layer is located on the side of the first buffer layer away from the first conductive layer. The perovskite solar cell layer also includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the perovskite functional layer, and a second conductive layer is disposed in the second groove and connected to the first conductive layer; the third groove penetrates at least the second conductive layer.

[0020] Optionally, the functional layer covers part of the first conductive layer, and the second conductive layer covers the functional layer; The solar electronic display also includes a conductive structure; the conductive structure is located in the part of the first conductive layer that is not covered by the functional layer; the conductive structure is used to couple the solar cell layer and the electronic display layer to form a current loop.

[0021] Optionally, the electronic display layer includes a circuit board and an electronic screen; the electronic screen is disposed on the circuit board; the circuit board is located on the side of the electronic screen away from the substrate; A first electrode and a second electrode are provided on the circuit board. The first electrode on the circuit board is electrically connected to the first electrode of the solar cell layer through a conductive structure, and the second electrode on the circuit board is electrically connected to the second electrode of the solar cell layer through a conductive structure.

[0022] Optionally, the material of the conductive structure includes any one of conductive tape, aluminum strip, aluminum bar, and conductive film, and / or the material of the substrate and cover plate includes glass made of silicon oxide.

[0023] According to another aspect of the present invention, a method for fabricating a solar-powered electronic display device is provided, comprising: A substrate is provided, the substrate having a first surface; the first surface having a first region and a second region, the first region and the second region being different; A solar cell layer and an electronic display layer are formed on the first surface of a substrate. The solar cell layer is located in a first region of the first surface, and the electronic display layer is located in a second region of the first surface. The electronic display layer and the solar cell layer form a current loop. A cover plate is formed, which cooperates with the substrate to seal the solar cell layer and the electronic display layer, thereby achieving co-encapsulation of the solar cell layer and the electronic display layer, and incident light can be incident on the solar cell layer through the cover plate.

[0024] Optionally, a solar cell layer and an electronic display layer are formed on the first surface of the substrate, including: A solar cell layer is formed in a first region of a substrate, exposing a second region of the first surface; the first region and the second region are non-overlapping regions of the first surface; An electronic display layer is formed in the second region, which is then electrically connected to the solar cell layer.

[0025] The solar-powered electronic price tag provided by this invention includes: a substrate having a first surface; a solar cell layer located on the first surface; an electronic price tag layer located on the first surface, the electronic price tag layer and the solar cell layer forming a current loop, the vertical projection of the electronic price tag layer on the substrate and the vertical projection of the solar cell layer on the substrate not overlapping; and a cover plate, which cooperates with the substrate to encapsulate the solar cell layer and the electronic price tag layer together, and incident light can be incident on the solar cell layer through the cover plate. In this invention, it is not necessary to encapsulate the solar cell layer separately. The solar cell layer and the electronic price tag layer are encapsulated together by the substrate and the cover plate, thereby realizing the co-encapsulation of the solar cell layer and the electronic price tag layer during the solar cell manufacturing process. At the same time, the cover plate provides incident light to the solar cell layer, and the solar cell layer further performs photoelectric conversion on the incident light to provide power to the electronic price tag layer. Moreover, since the solar cell layer and the electronic price tag layer are set on the same layer, the structure is simple, and the encapsulation cost and the thickness of the solar-powered electronic price tag can be reduced.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a solar-powered electronic price tag provided in an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of another type of solar-powered electronic price tag provided in an embodiment of the present invention.

[0030] Figure 3 yes Figure 2 A schematic diagram of the cross-section along section line A1A2.

[0031] Figure 4 This is a flowchart of a method for preparing a solar-powered electronic price tag according to an embodiment of the present invention.

[0032] Figure 5 yes Figure 4 S120 includes a detailed flowchart.

[0033] Figures 6-11 This is a schematic diagram of the intermediate structure of a solar-powered electronic price tag provided in an embodiment of the present invention.

[0034] Figure 12 This is a schematic diagram of the structure of a solar-powered electronic display device provided by the present invention. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] This invention provides a solar-powered electronic price tag. Figure 1This is a schematic diagram of the structure of a solar-powered electronic price tag provided in an embodiment of the present invention. (Refer to...) Figure 1 The solar-powered electronic shelf label includes: a substrate 10 having a first surface M1; a solar cell layer 20 located on the first surface M1; an electronic shelf label layer 30 located on the first surface M1, the electronic shelf label layer 30 and the solar cell layer 20 forming a current loop, the vertical projection of the electronic shelf label layer 30 on the substrate 10 and the vertical projection of the solar cell layer 20 on the substrate 10 not overlapping; and a cover plate 40, which cooperates with the substrate 10 to seal the solar cell layer 20 and the electronic shelf label layer 30. At the same time, incident light can be provided to the solar cell layer 20 through the cover plate 40, and the solar cell layer 20 further performs photoelectric conversion on the incident light to provide power to the electronic shelf label layer 30.

[0038] The substrate 10 can be made of glass. Since the electronic price tag layer 30 is typically used indoors in retail settings such as supermarkets and stores, silicon wafers or other thin-film solar cells would have poor low-light performance and would not provide effective power to the electronic price tag layer 30. Perovskite, as a novel type of thin-film solar cell, has advantages such as good low-light performance and high conversion efficiency, and can be used as a power source for the electronic price tag layer 30 under indoor lighting conditions. Therefore, the solar cell layer 20 can be a perovskite layer or other solar cells with good low-light performance. The solar cell layer 20 covers part of the substrate 10. As the power source for the electronic price tag layer 30, the solar cell layer 20 saves on battery maintenance and replacement costs. The electronic price tag layer 30 includes a circuit board and an electronic screen. The circuit board integrates a control unit, driver chip, circuitry, and other control systems, and is electrically connected to the electronic screen to control the display of relevant information. A cover plate 40 is located on the side of the electronic price tag layer 30 away from the substrate 10; the cover plate 40 contacts and surrounds the solar cell layer 20 and the electronic price tag layer 30. The cover plate 40 is made of materials including but not limited to silica glass such as clear glass or quartz cover glass. The substrate 10 and the cover plate 40 form a sealed vacuum space to protect the solar cell layer 20 and the electronic label layer 30. The cover plate 40 can be concave in shape, encapsulating the entire solar cell layer 20 and the electronic label layer 30. The dimensions of the concave cover plate 40 are consistent with those of the substrate 10, and the depth of the concave recess in the middle of the cover plate 40 matches the thickness of the electronic label layer 30. It is then adhered and fixed by vacuuming.

[0039] The electronic price tag layer 30 and the solar cell layer 20 are disposed on the same layer. The solar cell layer 20 can be located on either side of the electronic price tag layer 30, or the solar cell layer 20 can surround the electronic price tag layer 30. The vertical projection of the electronic price tag layer 30 on the substrate 10 does not overlap with the vertical projection of the solar cell layer 20 on the substrate 10, which can prevent the solar cell layer 20 from blocking the electronic price tag layer 30 and affecting its display. Since the electronic price tag layer 30 and the solar cell layer 20 are disposed on the same layer, the thickness of the solar cell layer 20 is smaller. Compared with the solar cell layer 20 being located on the back of the electronic price tag layer 30, the overall thickness of the solar electronic price tag can be reduced. In this embodiment of the invention, the solar cell layer 20 does not need to be separately packaged. The solar cell layer 20 and the electronic price tag layer 30 are packaged together by the substrate 10 and the cover plate 40, realizing the co-encapsulation of the solar cell layer 20 and the electronic price tag layer 30. At the same time, the incident light is incident on the solar cell layer 20 through the cover plate 40, and the solar cell layer 20 further performs photoelectric conversion on the incident light to provide power to the electronic price tag layer 30. Since the solar cell layer 20 and the electronic price tag layer 30 are set in the same layer, the structure is simple and the packaging cost and the thickness of the solar electronic price tag can be reduced.

[0040] The solar-powered electronic price tag provided by the present invention includes: a substrate 10 having a first surface M1; a solar cell layer 20 located on the first surface M1; an electronic price tag layer 30 located on the first surface M1, wherein the electronic price tag layer 30 and the solar cell layer 20 form a current loop, and the vertical projection of the electronic price tag layer 30 on the substrate 10 does not overlap with the vertical projection of the solar cell layer 20 on the substrate 10; and a cover plate 40 that cooperates with the substrate 10 to seal the solar cell layer 20 and the electronic price tag layer 30. In this embodiment of the invention, the solar cell layer 20 does not need to be separately packaged. The solar cell layer 20 and the electronic price tag layer 30 are packaged together by the substrate 10 and the cover plate 40, realizing the co-encapsulation of the solar cell layer 20 and the electronic price tag layer 30. Since the solar cell layer 20 and the electronic price tag layer 30 are set on the same layer, the incident light is incident on the solar cell layer 20 through the cover plate 40. The solar cell layer 20 further performs photoelectric conversion on the incident light to provide power to the electronic price tag layer 30, which makes the structure simple and can reduce the packaging cost and the thickness of the solar electronic price tag.

[0041] Based on the above embodiments, Figure 2 This is a schematic diagram of another type of solar-powered electronic price tag provided in an embodiment of the present invention. Figure 3 yes Figure 2 A schematic diagram of the cross-section along section line A1A2, for reference. Figure 2 and Figure 3Optionally, the electronic price tag layer 30 is disposed on the same layer as the solar cell layer 20, and the electronic price tag layer 30 is located on one side of the solar cell layer 20 along the first direction X; or, the solar cell layer 20 is disposed around the electronic price tag layer 30; wherein, the first direction X is perpendicular to the second direction Y of the substrate 10 pointing to the cover plate 40.

[0042] Along the first direction X, the electronic price tag layer 30 can be located to the left or right of the solar cell layer 20, or the solar cell layer 20 can be arranged around the electronic price tag layer 30, that is, the solar cell layer 20 is arranged in a ring and the electronic price tag layer 30 is located at the center of the ring of the solar cell layer 20. This can prevent the solar cell layer 20 from blocking the electronic price tag layer 30, and at the same time provide effective power to the electronic price tag layer 30.

[0043] Based on the above embodiments, optionally, refer to Figure 3 The solar cell layer 20 includes at least a first conductive layer 21, a functional layer 22, and a second conductive layer 23 stacked sequentially; the second conductive layer 23 is located on the side of the first conductive layer 21 away from the substrate 10; the functional layer 22 includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, the second buffer layer being located on the side of the first buffer layer away from the first conductive layer; the solar cell layer 20 also includes a first groove P1, a second groove P2, and a third groove P3; the first groove P1 penetrates the first conductive layer 21; the second groove P2 penetrates the functional layer 22, and a second conductive layer 23 is disposed in the second groove P2 and connected to the first conductive layer 21; the third groove P3 at least penetrates the second conductive layer 23.

[0044] The third groove P3 is essentially used to isolate the second conductive layer 23. The implementation includes: the third groove P3 at least penetrates the second conductive layer 23 to form multiple sub-cells 201 connected in series. For example, the third groove P3 only penetrates the second conductive layer 23; or, the third groove P3 penetrates the second conductive layer 23 and part of the functional layer 22; or, the third groove P3 penetrates the second conductive layer 23 and the functional layer 22 up to the first conductive layer 21, and the third groove P3 penetrates at most to the surface of the first conductive layer 21 without damaging the first conductive layer.

[0045] Among them, since electronic price tag layer 30 is often used in indoor retail scenarios such as supermarkets and stores, silicon wafer solar cells or other thin-film solar cells have poor low-light effect and cannot provide effective power for electronic price tag layer 30; perovskite solar cells, as a new type of thin-film solar cell, have the advantages of good low-light effect and high conversion efficiency, and can be used as the power supply for electronic price tag layer 30 in indoor lighting conditions.

[0046] The fabrication steps of the solar cell layer 20 are as follows: First, a first groove P1 is etched on the first conductive layer 21. Then, a first buffer layer, an absorber layer, and a second buffer layer are fabricated on the first conductive layer 21. The absorber layer can be a perovskite layer. If the first buffer layer is an electron transport layer, then the second buffer layer is a hole transport layer; if the first buffer layer is a hole transport layer, then the second buffer layer is an electron transport layer. The first buffer layer, absorber layer, and second buffer layer are collectively referred to as the functional layer. Next, a second groove P2 is etched to the right or left of the first groove P1. Then, a second conductive layer 23 is fabricated on the functional layer. Finally, a third groove P3 is etched to the right or left of the second groove P2. The first groove P1, second groove P2, and third groove P3 are arranged sequentially to form multiple series-connected sub-cells 201. Figure 3 The red line represents the series connection structure of multiple sub-cells 201. For example, the first groove P1, the second groove P2 and the third groove P3 are arranged in sequence, and the vertical projection of the third groove P3 on the substrate 10 does not overlap with the vertical projection of the second groove P2 on the substrate 10; the vertical projection of the second groove P2 on the substrate 10 does not overlap with the vertical projection of the first groove P1 on the substrate 10.

[0047] Specifically, the first conductive layer 21 includes, but is not limited to, FTO glass and ITO glass; in this case, FTO glass is used. The preparation method for forming the first groove P1 includes, but is not limited to, any one of chemical etching, mechanical scribing, laser etching, etc.; in this embodiment of the invention, laser etching can be used. The electron transport layer includes, but is not limited to, one or more combinations of fullerene derivatives (PCBM), titanium dioxide (TiO2), tin dioxide (SnO2), zinc oxide (ZnO), niobium pentoxide (Nb2O5), fullerenes, etc.; the hole transport layer includes, but is not limited to, one or more combinations of nickel oxide (NiO), spiro-oxymethyltriphenylamine (Spiro-OMeTAD), copper gallium oxide (CuGaO2), cuprous thiocyanate (CuSCN), poly(3-hexylthiophene) (P3HT), poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) (PEDOT:PSS), self-assembled monolayers (SAM), etc. The materials selected for the perovskite layer include, but are not limited to, MAPbI3, MAPbBr3, FAPbI3, FAPbBr3, CsPbI3, CsPbBr3, FAMAPbI3, FACsPbI3, FAMACsPbI3, and FAMACsPbIBr, etc., and the solvent is one or a combination of N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), N-methylpyrrolidone (NMP), γ-butyrolactone (γ-GBL), etc. The preparation method for forming the second groove P2 includes, but is not limited to, mechanical scribing, laser etching, etc., and laser etching can be used in the embodiments of this invention. The material of the second conductive layer 23 includes, but is not limited to, metals or metal oxides, such as copper (Cu), silver (Ag), gold (Au), indium tin oxide (ITO), indium tungsten oxide (IWO), fluorine-doped tin oxide (FTO), indium zinc oxide (IZO), indium cobalt oxide (ICO), carbon paste, and one or more combinations thereof. The fabrication method of the second conductive layer 23 includes, but is not limited to, physical vapor deposition (PVD), evaporation, reactive physical vapor deposition (RPD), screen printing, atomic layer deposition (ALD), and other methods. The preparation method for forming the third groove P3 includes, but is not limited to, mechanical scribing, laser etching, and photomask. In this embodiment of the invention, laser etching can be used.

[0048] Based on the above embodiments, optionally, the solar cell layer is a perovskite solar cell layer; the solar cell layer includes at least a first conductive layer, a perovskite functional layer and a second conductive layer stacked sequentially; the second conductive layer is located on the side of the first conductive layer away from the substrate; the perovskite functional layer includes a first buffer layer, a perovskite light-absorbing layer and a second buffer layer stacked sequentially, the second buffer layer is located on the side of the first buffer layer away from the first conductive layer; the perovskite solar cell layer also includes a first groove, a second groove and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the perovskite functional layer, and a second conductive layer is disposed in the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

[0049] Based on the above embodiments, optionally, refer to Figure 3 The functional layer 22 covers a portion of the first conductive layer 21, and the second conductive layer 23 covers the functional layer 22. The solar electronic price tag also includes a conductive structure 50. The conductive structure 50 is located in the area of ​​the first conductive layer 21 that is not covered by the functional layer 22. The conductive structure 50 is used to couple the solar cell layer 20 and the electronic price tag layer 30 to form a current loop.

[0050] The material of the conductive structure 50 includes, but is not limited to, conductive tape, aluminum strip, aluminum bar, conductive film, and other materials suitable for electrode lead-out. In this embodiment of the invention, the material of the conductive structure 50 can be conductive tape. The conductive tape is attached to the positive and negative electrodes of the solar cell layer 20. The conductive structure 50 can serve as an electrical connection between the solar cell layer 20 and the electronic price tag layer 30, so that the solar cell layer 20 acts as a power source to supply power to the electronic price tag layer 30.

[0051] Based on the above embodiments, optionally, refer to Figures 1-3 The electronic price tag layer 30 includes a circuit board and an electronic screen; the electronic screen is disposed on the circuit board; the circuit board is located on the side of the electronic screen away from the substrate 10; a first electrode and a second electrode are disposed on the circuit board, the first electrode on the circuit board is electrically connected to the first electrode of the solar cell layer 20 through a conductive structure 50, and the second electrode on the circuit board is electrically connected to the second electrode of the solar cell layer 20 through a conductive structure 50.

[0052] The electronic screen of the electronic price tag layer 30 can be an electronic paper screen; the circuit board includes, but is not limited to, PCB circuit boards, flexible printed circuit boards, etc. In this embodiment of the invention, a flexible printed circuit board can be used, wherein the circuit board is electrically connected to the electronic paper screen to control the display of the electronic paper screen. The circuit board integrates control systems such as control units, driver chips, and circuits, and matches a micro voltage regulator on the circuit board so that the electronic screen can be used normally; positive and negative electrodes are integrated on the circuit board, and materials suitable for electrode lead-out, including but not limited to conductive tape, aluminum strip, aluminum bar, conductive film, etc., are used. In this case, conductive tape is used. The conductive tape is pasted on the positive and negative electrodes of the solar cell layer 20 and the circuit board so that the solar cell layer 20 acts as a power source to supply power to the electronic price tag layer 30.

[0053] Specifically, the first electrode of the solar cell layer 20 can be a positive electrode, and the second electrode of the solar cell layer 20 can be a negative electrode, as shown in the reference. Figure 3 In the solar cell layer 20, the side of the first conductive layer 21 that contacts the conductive structure 50 is the positive electrode, and the other side of the first conductive layer 21 that contacts the conductive structure 50 is the negative electrode. The conductive structure 50 connects the first electrode of the circuit board and the first electrode of the solar cell layer 20, and connects the second electrode of the circuit board and the second electrode of the solar cell layer 20, so that the solar cell layer 20 acts as a power source to supply power to the electronic price tag layer 30.

[0054] Based on the above embodiments, optionally, the material of the conductive structure includes any one of conductive tape, aluminum strip, aluminum bar, and conductive film, and / or the material of the substrate and cover plate includes glass made of silicon oxide.

[0055] The conductive materials used in this system are all employed to achieve electrical connections, and are cost-effective with mature manufacturing processes. The substrate and cover are made of transparent materials, allowing for unobstructed views of the solar cell layer, improving the photoelectric conversion efficiency of the solar cells, and displaying the content of the electronic price tag layer.

[0056] Based on the above embodiments, this invention also provides a method for preparing a solar-powered electronic shelf label. Figure 4 This is a flowchart of a method for preparing a solar-powered electronic shelf label according to an embodiment of the present invention, see reference. Figure 4 The methods for preparing solar-powered electronic price tags include: S110, A substrate is provided, the substrate having a first surface.

[0057] S120. A solar cell layer and an electronic price tag layer are formed on the first surface of the substrate. The electronic price tag layer and the solar cell layer form a current loop. The vertical projection of the electronic price tag layer on the substrate does not overlap with the vertical projection of the solar cell layer on the substrate.

[0058] S130. A cover plate is formed, which cooperates with the substrate to seal the solar cell layer and the electronic label layer, thereby achieving co-encapsulation of the solar cell layer and the electronic label layer. Incident light is incident on the solar cell layer through the cover plate.

[0059] In this embodiment of the invention, the solar cell layer 20 does not need to be separately packaged. The solar cell layer 20 and the electronic price tag layer 30 are packaged together by the substrate 10 and the cover plate 40, realizing the co-encapsulation of the solar cell layer 20 and the electronic price tag layer 30. Since the solar cell layer 20 and the electronic price tag layer 30 are set on the same layer, and the cover plate 40 provides incident light to the solar cell layer 20, the solar cell layer 20 further performs photoelectric conversion on the incident light to provide power to the electronic price tag layer 30. This simplifies the structure and reduces the packaging cost and the thickness of the solar electronic price tag.

[0060] Based on the above embodiments, optionally, Figure 5 yes Figure 4 S120 includes a detailed flowchart, Figures 6-11 This is a schematic diagram of the intermediate structure of a solar-powered electronic price tag provided in an embodiment of the present invention. (Refer to...) Figure 5 The process of forming a solar cell layer and an electronic price tag layer on one side of the substrate in S120 is further refined to include: S1201. A solar cell transition layer is formed on the first surface of the substrate.

[0061] S1202. Remove the preset area of ​​the solar cell transition layer to form a solar cell layer, wherein the preset area does not overlap with the vertical projection of the solar cell layer on the first surface.

[0062] S1203. An electronic price tag layer is formed in a preset area, so that the electronic price tag layer is electrically connected to the solar cell layer.

[0063] S1201 is further refined, specifically including: S121. A first conductive material layer is formed on one side of the substrate.

[0064] The first conductive material layer covers the substrate. (Reference) Figure 6 and Figure 7 , Figure 7 yes Figure 6 The cross-sectional diagram along the middle section line A3A4 shows that the first conductive material layer 01 includes, but is not limited to, FTO glass and ITO glass. In this case, FTO glass is used.

[0065] S122, A first groove is formed on the first conductive material layer.

[0066] The first groove penetrates the first conductive material layer. (Reference) Figure 7For example, the first conductive material layer 01 can be etched using an etching process so that the first groove P1 penetrates the first conductive material layer 01. The etching process includes, but is not limited to, any one of chemical etching, mechanical scribing, laser etching, etc. In this embodiment of the invention, the first groove P1 can be formed by laser etching.

[0067] S123. A functional material layer is formed on the side of the first conductive material layer away from the substrate.

[0068] The functional material layer covers the first conductive material layer and the first groove. The functional material layer 02 includes a first buffer layer, an absorption layer and a second buffer layer stacked sequentially. The first buffer layer and the second buffer layer are different transport layers, specifically a hole transport layer or an electron transport layer.

[0069] S124. A second groove is formed on the functional material layer.

[0070] The second groove penetrates the functional material layer. (Reference) Figure 7 For example, the second groove P2 can be formed by etching the functional material layer 02 using an etching process. The etching process includes, but is not limited to, mechanical scribing, laser etching, etc. In this embodiment of the invention, laser etching can be used to form the second groove P2. The second groove P2 can be located to the left or right of the first groove P1; alternatively, the second groove P2 can be formed simultaneously with the coating of the functional material layer 02 using a chemical repulsion method; or, a photomask can be used to form the second groove P2.

[0071] S125. A second conductive material layer is formed on the side of the functional material layer away from the substrate.

[0072] The second conductive material layer covers the functional material layer and fills the second groove. The material of the second conductive material layer 03 includes, but is not limited to, metals or metal oxides, and the fabrication method of the second conductive material layer includes, but is not limited to, physical vapor deposition (PVD), vapor deposition, reactive physical vapor deposition (RPD), screen printing, atomic layer deposition (ALD), etc.

[0073] S126. A third groove is formed on the second conductive material layer.

[0074] The third groove P3 penetrates at least the second conductive material layer. The essence of the third groove P3 is to isolate the second conductive layer 23. Implementation methods include: the third groove P3 penetrating at least the second conductive layer 23 to form multiple series-connected sub-cells 201; for example, the third groove P3 only penetrates the second conductive layer 23; or, the third groove P3 penetrates the second conductive layer 23 and part of the functional layer 22; or, the third groove P3 penetrates the second conductive layer 23 and the functional layer 22 up to the first conductive layer 21, and the third groove P3 penetrates at most to the surface of the first conductive layer 21 without damaging the first conductive layer.

[0075] refer to Figure 7 The fabrication process for forming the third groove P3 includes, but is not limited to, mechanical scribing, laser etching, or a photomask. In this embodiment of the invention, laser etching can be used to form the third groove P3. The third groove P3 can be located to the left or right of the second groove P2, with the first groove P1, the second groove P2, and the third groove P3 arranged sequentially.

[0076] S1202 is further refined in the first way, specifically including: S127. Process the first conductive material layer, the functional material layer, and the second conductive material layer to expose a portion of the substrate, forming the first conductive layer, the functional material sublayer, and the second conductive material sublayer.

[0077] Among them, reference Figures 7-9 , Figure 9 yes Figure 8 Along the cross-sectional view of section lines A5A6, a cleaning process is performed on the first conductive material layer 01, the functional material layer 02, and the second conductive material layer 03 to remove the edge areas of the first conductive material layer 01, the functional material layer 02, and the second conductive material layer 03, as well as the areas where electronic price tags will be installed later, forming the first conductive layer 21, the functional material sub-layer 04, and the second conductive material sub-layer 05. S128, The functional material sub-layer and the second conductive material sub-layer are processed to form the functional layer and the second conductive layer, thus forming the solar cell layer.

[0078] The functional layer partially covers the first conductive layer, and the second conductive layer covers the functional layer. The functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, with the second buffer layer located on the side of the first buffer layer furthest from the first conductive layer. (Reference) Figures 10-11 , Figure 11 yes Figure 10 According to the cross-sectional diagram along section line A7A8, the functional material sublayer and the second conductive material sublayer are subjected to secondary edge cleaning to form a functional layer 22 and a second conductive layer 23, forming a solar cell layer 20. The solar cell layer 20 can be a perovskite solar cell layer. The first electrode and the second electrode of the solar cell layer 20 are led out through the first conductive layer 21. The first electrode and the second electrode of the solar cell layer 20 are the positive electrode and the negative electrode of the solar cell.

[0079] S1202 is further refined in a second way, specifically including: S127. Process the functional material layer and the second conductive material layer to form the functional layer and the second conductive layer.

[0080] S128. The first conductive material layer is processed to form a first conductive layer and a solar cell layer. A functional layer covers part of the first conductive layer, and a second conductive layer covers the functional layer. The functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked in sequence. The second buffer layer is located on the side of the first buffer layer away from the first conductive layer.

[0081] Alternatively, a portion of the functional material layer and the second conductive material layer can be removed first to form the final structure of the functional layer and the second conductive layer; then, a portion of the first conductive material layer can be removed so that the functional layer covers part of the first conductive layer and the second conductive layer covers the functional layer.

[0082] S129. Provide an electronic price tag layer so that the electronic price tag layer is electrically connected to the solar cell layer.

[0083] The electronic price tag layer 30 includes a circuit board and an electronic screen; the electronic screen is disposed on the circuit board; the circuit board is located on the side of the electronic screen away from the substrate 10; a first electrode and a second electrode are disposed on the circuit board, the first electrode on the circuit board is electrically connected to the first electrode of the solar cell layer 20, and the second electrode on the circuit board is electrically connected to the second electrode of the solar cell layer 20.

[0084] Based on the above embodiments, optionally, after forming the solar cell layer, the method further includes: A conductive structure is formed on the side of the first conductive layer away from the substrate. The conductive structure is located in the part of the first conductive layer that is not covered by the functional layer. The conductive structure is used to couple the solar cell layer and the electronic tag layer to form a current loop.

[0085] The material of the conductive structure 50 includes, but is not limited to, conductive tape, aluminum strip, aluminum bar, conductive film, and other materials suitable for electrode lead-out. In this embodiment of the invention, the material of the conductive structure 50 can be conductive tape. The conductive tape is attached to the positive and negative electrodes of the solar cell layer 20. The conductive structure 50 can serve as an electrical connection between the solar cell layer 20 and the electronic price tag layer 30, so that the solar cell layer 20 acts as a power source to supply power to the electronic price tag layer 30.

[0086] Based on the above embodiments, optionally, after forming the cover plate, the process further includes: encapsulating the substrate and the cover plate using laser encapsulation technology, film encapsulation technology, or sealing material encapsulation technology.

[0087] In this process, laser encapsulation, adhesive film encapsulation, or sealing material encapsulation can be used to seal the substrate and cover plate at the concave edges. The area where the concave portion of the cover plate contacts the circuit board in the electronic price tag layer is fixed with adhesive and placed in a vacuum chamber to remove air from the product, creating a vacuum in the unfilled area between the cover plate and the substrate. (Reference) Figure 2 , Figure 2 The three red circles in the figure are laser packaging lines. In this embodiment of the invention, laser packaging can be used to achieve product packaging without consuming additional consumables (such as adhesives) or adding other processes (such as adding a snap-fit ​​structure).

[0088] Specifically, subsequent products can also have a housing assembled around the base plate and cover plate for practical use. The housing of appropriate size can be selected, and the material of the housing includes, but is not limited to, plastic, metal, etc., to provide auxiliary protection for the product with an outer frame.

[0089] The method for preparing the solar-powered electronic shelf label in this embodiment of the invention belongs to the same inventive concept as the solar-powered electronic shelf label described in any of the above embodiments of the invention, and has the same beneficial effects.

[0090] Based on the above embodiments, this invention also provides a solar-powered electronic display device. Figure 12 This is a schematic diagram of the structure of a solar-powered electronic display device provided by the present invention, for reference. Figure 12 The system includes: a substrate 10 having a first surface, the first surface having a first region 11 and a second region 12, the first region 11 and the second region 12 being different; a solar cell layer 20 located in the first region 11 of the first surface; an electronic display layer 100 located in the second region 12 of the first surface, the electronic display layer 100 and the solar cell layer 20 forming a current loop; and a cover plate 40, which cooperates with the substrate 10 to seal the solar cell layer 20 and the electronic display layer 100, thereby achieving co-encapsulation of the solar cell layer 20 and the electronic display layer 100, and incident light is incident on the solar cell layer 20 through the cover plate 40.

[0091] The solar electronic display device provided in the embodiments of the present invention and the solar electronic price tag described in any embodiment of the present invention belong to the same inventive concept, and the same reference numerals and structure have the same effect.

[0092] The difference lies in that the electronic display layer 100 in the solar electronic display device provided in this embodiment of the invention may include an electronic price tag layer, or some other display units. Furthermore, the first region 11 and the second region 12 in this embodiment of the invention are different regions of the first surface and do not overlap.

[0093] Optionally, the electronic display layer and the solar cell layer are disposed on the same layer; the first region and the second region are non-overlapping regions of the first surface; along the first direction, the electronic display layer is located on one side of the solar cell layer; or, the solar cell layer is disposed around the electronic display layer; wherein, the first direction is perpendicular to the second direction of the substrate pointing to the cover plate.

[0094] Optionally, the solar cell layer includes at least a first conductive layer, a functional layer, and a second conductive layer stacked sequentially; the second conductive layer is located on the side of the first conductive layer away from the substrate; the functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, the second buffer layer being located on the side of the first buffer layer away from the first conductive layer; the solar cell layer also includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the functional layer, and a second conductive layer is disposed within the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

[0095] Optionally, the solar cell layer is a perovskite solar cell layer, which includes at least a first conductive layer, a perovskite functional layer, and a second conductive layer stacked sequentially; the second conductive layer is located on the side of the first conductive layer away from the substrate; the perovskite functional layer includes a first buffer layer, a perovskite light-absorbing layer, and a second buffer layer stacked sequentially, with the second buffer layer located on the side of the first buffer layer away from the first conductive layer; the perovskite solar cell layer also includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the perovskite functional layer, and a second conductive layer is disposed within the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

[0096] Optionally, the functional layer covers a portion of the first conductive layer, and the second conductive layer covers the functional layer; the solar electronic display also includes a conductive structure; the conductive structure is located in the portion of the first conductive layer not covered by the functional layer; the conductive structure is used to couple the solar cell layer and the electronic display layer to form a current loop.

[0097] Optionally, the electronic display layer includes a circuit board and an electronic screen; the electronic screen is disposed on the circuit board; the circuit board is located on the side of the electronic screen away from the substrate; A first electrode and a second electrode are provided on the circuit board. The first electrode on the circuit board is electrically connected to the first electrode of the solar cell layer through a conductive structure, and the second electrode on the circuit board is electrically connected to the second electrode of the solar cell layer through a conductive structure.

[0098] Optionally, the material of the conductive structure includes any one of conductive tape, aluminum strip, aluminum bar, and conductive film, and / or the material of the substrate and cover plate includes glass made of silicon oxide.

[0099] Based on the above embodiments, a method for fabricating a solar-powered electronic display device is provided, comprising: A substrate is provided, the substrate having a first surface; the first surface having a first region and a second region, the first region and the second region being different; A solar cell layer and an electronic display layer are formed on the first surface of a substrate. The solar cell layer is located in a first region of the first surface, and the electronic display layer is located in a second region of the first surface. The electronic display layer and the solar cell layer form a current loop. A cover plate is formed, which cooperates with the substrate to seal the solar cell layer and the electronic display layer, so as to achieve co-encapsulation of the solar cell layer and the electronic display layer, and incident light is incident on the solar cell layer through the cover plate.

[0100] Optionally, a solar cell layer and an electronic display layer are formed on the first surface of the substrate, including: A solar cell layer is formed in a first region of a substrate, exposing a second region of the first surface; the first region and the second region are non-overlapping regions of the first surface; An electronic display layer is formed in the second region, which is then electrically connected to the solar cell layer.

[0101] Optionally, a solar cell layer is formed on one side of the substrate, including: A first conductive material layer is formed on one side of the substrate, and the first conductive material layer covers the substrate; A first groove is formed on a first conductive material layer, and the first groove penetrates the first conductive material layer; A functional material layer is formed on the side of the first conductive material layer away from the substrate, and the functional material layer covers the first conductive material layer and the first groove. A second groove is formed on the functional material layer, and the second groove penetrates the functional material layer; A second conductive material layer is formed on the side of the functional material layer away from the substrate, and the second conductive material layer covers the functional material layer and fills the second groove. A third groove is formed on the second conductive material layer, and the third groove at least penetrates the second conductive material layer; The first conductive material layer, the functional material layer, and the second conductive material layer are processed to expose a portion of the substrate, forming a first conductive layer, a functional material sublayer, and a second conductive material sublayer; the functional material sublayer and the second conductive material sublayer are processed to form a functional layer and a second conductive layer, forming a solar cell layer. The functional layer covers a portion of the first conductive layer, and the second conductive layer covers the functional layer. The functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, with the second buffer layer located on the side of the first buffer layer away from the first conductive layer; or... The functional material layer and the second conductive material layer are processed to form a functional layer and a second conductive layer; the first conductive material layer is processed to form a first conductive layer, forming a solar cell layer. The functional layer covers part of the first conductive layer, and the second conductive layer covers the functional layer. The functional layer includes a first buffer layer, a light-absorbing layer and a second buffer layer stacked sequentially. The second buffer layer is located on the side of the first buffer layer away from the first conductive layer.

[0102] Optionally, after forming the solar cell layer, the process further includes: A conductive structure is formed on the side of the first conductive layer away from the substrate. The conductive structure is located in the part of the first conductive layer that is not covered by the functional layer. The conductive structure is used to couple the solar cell layer and the electronic display layer to form a current loop.

[0103] Optionally, after forming the cover plate, the substrate and the cover plate may be encapsulated using laser encapsulation, film encapsulation, or sealing material encapsulation.

[0104] The method for preparing the solar electronic display device provided by the technical solution of this invention has the same beneficial effects as the solar electronic display device described in any embodiment of this invention.

[0105] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0106] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for preparing a solar-powered electronic shelf label, characterized in that, include: A substrate is provided, the substrate having a first surface; A solar cell layer and an electronic price tag layer are formed on the first surface of a substrate. The electronic price tag layer and the solar cell layer form a current loop. The vertical projection of the electronic price tag layer on the substrate does not overlap with the vertical projection of the solar cell layer on the substrate. A cover plate is formed, which cooperates with the substrate to seal the solar cell layer and the electronic label layer to achieve co-encapsulation of the solar cell layer and the electronic label layer, and incident light can be incident on the solar cell layer through the cover plate; A solar cell layer and an electronic price tag layer are formed on the first surface of the substrate, including: A solar cell transition layer is formed on the first surface of the substrate; A predetermined area of ​​the solar cell transition layer is removed to form a solar cell layer, wherein the predetermined area does not overlap with the vertical projection of the solar cell layer on the first surface; An electronic price tag layer is formed within the preset area, thereby electrically connecting the electronic price tag layer to the solar cell layer.

2. The method for preparing a solar-powered electronic shelf label according to claim 1, characterized in that, A solar cell transition layer is formed on the first surface of the substrate, comprising: A first conductive material layer is formed on one side of the substrate, and the first conductive material layer covers the substrate; A first groove is formed on the first conductive material layer, and the first groove penetrates the first conductive material layer; A functional material layer is formed on the side of the first conductive material layer away from the substrate, and the functional material layer covers the first conductive material layer and the first groove. A second groove is formed on the functional material layer, and the second groove penetrates the functional material layer; A second conductive material layer is formed on the side of the functional material layer away from the substrate, the second conductive material layer covering the functional material layer and filling the second groove; A third groove is formed on the second conductive material layer, the third groove at least penetrating the second conductive material layer; Removing a predetermined region of the solar cell transition layer to form a solar cell layer includes: The first conductive material layer, the functional material layer, and the second conductive material layer are processed to expose a portion of the substrate, forming a first conductive layer, a functional material sublayer, and a second conductive material sublayer; the functional material sublayer and the second conductive material sublayer are processed to form a functional layer and a second conductive layer, forming a solar cell layer. The functional layer covers a portion of the first conductive layer, and the second conductive layer covers the functional layer. The functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, with the second buffer layer located on the side of the first buffer layer away from the first conductive layer; or... The functional material layer and the second conductive material layer are processed to form a functional layer and a second conductive layer; the first conductive material layer is processed to form a first conductive layer, forming a solar cell layer. The functional layer covers a portion of the first conductive layer, and the second conductive layer covers the functional layer. The functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially. The second buffer layer is located on the side of the first buffer layer away from the first conductive layer.

3. The method for preparing a solar-powered electronic shelf label according to claim 2, characterized in that, After forming the solar cell layer, the process also includes: A conductive structure is formed on the side of the first conductive layer away from the substrate. The conductive structure is located in a portion of the first conductive layer not covered by the functional layer. The conductive structure is used to couple the solar cell layer and the electronic tag layer to form the current loop.

4. The method for preparing a solar-powered electronic shelf label according to claim 1, characterized in that, After the cover plate is formed, it includes: The substrate and the cover plate are encapsulated using laser encapsulation, film encapsulation, or sealing material encapsulation.

5. A solar-powered electronic price tag, characterized in that, Prepared using the method described in any one of claims 1-4; Solar-powered electronic price tags include: The substrate has a first surface; A solar cell layer is located on the first surface; An electronic price tag layer is located on the first surface. The electronic price tag layer and the solar cell layer form a current loop. The vertical projection of the electronic price tag layer on the substrate and the vertical projection of the solar cell layer on the substrate do not overlap. A cover plate, which cooperates with the substrate to seal the solar cell layer and the electronic label layer, so as to achieve co-encapsulation of the solar cell layer and the electronic label layer, and incident light can be incident on the solar cell layer through the cover plate.

6. The solar-powered electronic price tag according to claim 5, characterized in that, The electronic price tag layer is disposed on the same layer as the solar cell layer; Along the first direction, the electronic price tag layer is located on one side of the solar cell layer; or, the solar cell layer is disposed around the electronic price tag layer. Wherein, the first direction is perpendicular to the second direction in which the substrate points to the cover plate.

7. The solar-powered electronic price tag according to claim 5, characterized in that, The solar cell layer includes at least a first conductive layer, a functional layer, and a second conductive layer stacked sequentially; the second conductive layer is located on the side of the first conductive layer away from the substrate; the functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, the second buffer layer being located on the side of the first buffer layer away from the first conductive layer; the solar cell layer further includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the functional layer, and a second conductive layer is disposed within the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

8. The solar-powered electronic price tag according to claim 7, characterized in that, The solar cell layer is a perovskite solar cell layer, and the solar cell layer includes at least a first conductive layer, a perovskite functional layer and a second conductive layer stacked in sequence; the second conductive layer is located on the side of the first conductive layer away from the substrate; the perovskite functional layer includes a first buffer layer, a perovskite light-absorbing layer and a second buffer layer stacked in sequence, and the second buffer layer is located on the side of the first buffer layer away from the first conductive layer. The perovskite solar cell layer further includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the perovskite functional layer, and a second conductive layer is disposed in the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

9. The solar-powered electronic price tag according to claim 7, characterized in that, The functional layer covers a portion of the first conductive layer, and the second conductive layer covers the functional layer; The solar-powered electronic price tag also includes a conductive structure; the conductive structure is located in a portion of the first conductive layer not covered by the functional layer; the conductive structure is used to couple the solar cell layer and the electronic price tag layer to form the current loop.

10. The solar-powered electronic price tag according to claim 9, characterized in that, The electronic price tag layer includes a circuit board and an electronic screen; the electronic screen is disposed on the circuit board; the circuit board is located on the side of the electronic screen away from the substrate; The circuit board is provided with a first electrode and a second electrode. The first electrode on the circuit board is electrically connected to the first electrode of the solar cell layer through the conductive structure, and the second electrode on the circuit board is electrically connected to the second electrode of the solar cell layer through the conductive structure.

11. The solar-powered electronic price tag according to claim 9, characterized in that, The conductive structure is made of any one of conductive tape, aluminum strip, aluminum bar, and conductive film, and / or the substrate and the cover plate are made of silicon oxide glass.

12. A method for fabricating a solar-powered electronic display device, characterized in that, include: A substrate is provided, the substrate having a first surface; The first surface has a first region and a second region, wherein the first region and the second region are different; A solar cell layer and an electronic display layer are formed on a first surface of a substrate. The solar cell layer is located in a first region of the first surface, and the electronic display layer is located in a second region of the first surface. The electronic display layer and the solar cell layer form a current loop. A cover plate is formed, which cooperates with the substrate to seal the solar cell layer and the electronic display layer, so as to realize the co-encapsulation of the solar cell layer and the electronic display layer, and incident light can be incident on the solar cell layer through the cover plate; A solar cell layer and an electronic display layer are formed on the first surface of the substrate, including: A solar cell layer is formed in a first region of the substrate, exposing a second region of the first surface; the first region and the second region are non-overlapping regions of the first surface. An electronic display layer is formed in the second region, such that the electronic display layer is electrically connected to the solar cell layer.

13. A solar-powered electronic display device, characterized in that, The solar electronic display device is prepared using the method described in claim 12. Solar-powered electronic display devices include: A substrate has a first surface, the first surface having a first region and a second region, the first region and the second region being different; A solar cell layer located in the first region of the first surface; An electronic display layer is located in the second region of the first surface, and the electronic display layer forms a current loop with the solar cell layer; A cover plate, which cooperates with the substrate to seal the solar cell layer and the electronic display layer, so as to achieve co-encapsulation of the solar cell layer and the electronic display layer, and incident light can be incident on the solar cell layer through the cover plate.

14. The solar-powered electronic display device according to claim 13, characterized in that, The electronic display layer and the solar cell layer are disposed on the same layer; the first region and the second region are non-overlapping regions of the first surface; Along a first direction, the electronic display layer is located on one side of the solar cell layer; or, the solar cell layer is disposed around the electronic display layer. Wherein, the first direction is perpendicular to the second direction in which the substrate points to the cover plate.

15. The solar-powered electronic display device according to claim 13, characterized in that, The solar cell layer includes at least a first conductive layer, a functional layer, and a second conductive layer stacked sequentially; the second conductive layer is located on the side of the first conductive layer away from the substrate; the functional layer includes a first buffer layer, a light-absorbing layer, and a second buffer layer stacked sequentially, the second buffer layer being located on the side of the first buffer layer away from the first conductive layer; the solar cell layer further includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the functional layer, and a second conductive layer is disposed within the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

16. The solar-powered electronic display device according to claim 15, characterized in that, The solar cell layer is a perovskite solar cell layer, and the solar cell layer includes at least a first conductive layer, a perovskite functional layer and a second conductive layer stacked in sequence; the second conductive layer is located on the side of the first conductive layer away from the substrate; the perovskite functional layer includes a first buffer layer, a perovskite light-absorbing layer and a second buffer layer stacked in sequence, and the second buffer layer is located on the side of the first buffer layer away from the first conductive layer. The perovskite solar cell layer further includes a first groove, a second groove, and a third groove; the first groove penetrates the first conductive layer; the second groove penetrates the perovskite functional layer, and a second conductive layer is disposed in the second groove and connected to the first conductive layer; the third groove at least penetrates the second conductive layer.

17. The solar-powered electronic display device according to claim 15, characterized in that, The functional layer covers a portion of the first conductive layer, and the second conductive layer covers the functional layer; The solar electronic display further includes a conductive structure; the conductive structure is located in a portion of the first conductive layer not covered by the functional layer; the conductive structure is used to couple the solar cell layer and the electronic display layer to form the current loop.

18. The solar-powered electronic display device according to claim 17, characterized in that, The electronic display layer includes a circuit board and an electronic screen; the electronic screen is disposed on the circuit board; the circuit board is located on the side of the electronic screen away from the substrate; The circuit board is provided with a first electrode and a second electrode. The first electrode on the circuit board is electrically connected to the first electrode of the solar cell layer through the conductive structure, and the second electrode on the circuit board is electrically connected to the second electrode of the solar cell layer through the conductive structure.

19. The solar-powered electronic display device according to claim 17, characterized in that, The conductive structure is made of any one of conductive tape, aluminum strip, aluminum bar, and conductive film, and / or the substrate and the cover plate are made of silicon oxide glass.

Images