Packaging structure and solar cell module

Abstract

This application relates to the field of photovoltaic module technology, and more particularly to an encapsulation structure and a solar cell module. The encapsulation structure includes a first substrate and a second substrate; the first and second substrates are sealed together by a sealing structure to form a closed chamber, which is used to house the solar cell; a first lead-fixing adhesive film layer is disposed between the first substrate and the solar cell, and this first lead-fixing adhesive film layer is used to fix leaked lead ions. By incorporating the first lead-fixing adhesive film layer in the encapsulation structure, this application enables the first lead-fixing adhesive film layer to fix lead ions leaking or permeating from the perovskite light-absorbing layer through adsorption or chelation after the module ruptures, thereby effectively controlling lead ion leakage from the lead-containing solar cell. This reduces the environmental pollution and human health hazards caused by lead leakage, facilitating the industrial production of battery modules and environmental protection.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module technology, and in particular to an encapsulation structure and a solar cell module. Background Technology

[0002] The principle by which solar cells convert light energy into electrical energy is called the photovoltaic effect. The photovoltaic effect, existing in liquids, was first discovered in 1839. Since then, researchers have systematically analyzed and summarized these findings, making theoretical improvements, and the theoretical framework of solar cells was formally established. In 1954, Bell Labs increased the efficiency of monocrystalline silicon solar cells to 6%. Since then, solar cells have developed rapidly, opening up new horizons in the research field. Currently, solar cells are widely used in various fields, including home lighting, transportation, aerospace, petroleum, and marine applications. Therefore, solar cells have a very broad application prospect.

[0003] In perovskite solar cells, the ABX3 type perovskite material typically uses monovalent cations at the A-site, divalent metal ions at the B-site, and Br- or I- at the X-site. The defect states in the cell structure are mainly uncoordinated lead ions. A problem with this type of cell is that uncoordinated lead ions can easily lead to lead leakage, posing a significant challenge to environmental protection and posing a serious threat to human health. It should be noted that lead has strong accumulative properties and a long biological half-life (the half-life of lead in adult blood is about 28 days, and it can remain in bones for decades). A lead concentration of 0.5 mg / kg in soil can inhibit plant root development, and a lead concentration of 0.01 mg / L in aquatic environments can also inhibit lead growth. 2+ It can cause malformations in over 90% of fish embryos. The lead leachate from broken perovskite components can pollute the soil within a radius of up to 5 meters, and it can take several years to mitigate or eliminate its effects.

[0004] Therefore, in order to reduce environmental pollution and harm to human health, "locking" lead ions and inhibiting lead leakage is a feasible technical approach.

[0005] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Utility Model Content

[0006] This application provides a packaging structure and a solar cell module to solve or alleviate one or more of the technical problems mentioned above.

[0007] As a first aspect of the present application, the present application provides a packaging structure including a first substrate and a second substrate; the first substrate and the second substrate are sealed by a sealing structure to form a closed cavity between the first substrate and the second substrate, the closed cavity being used to house a solar cell; A first lead-fixing adhesive film layer is disposed between the first substrate and the solar cell, and the first lead-fixing adhesive film layer is used to fix the leaked lead ions.

[0008] Optionally, the first lead-fixing adhesive film layer includes a first adhesive film and a lead adsorbent mixed with the first adhesive film; The first film includes one or two of POE and EVA, and the lead adsorbent has a particle size of 0.1~10μm.

[0009] Optionally, the lead adsorbent includes one or more of zeolite molecular sieves, attapulgite, clay, vermiculite, ion exchange resins, and activated carbon.

[0010] Optionally, the mass fraction of the lead adsorbent in the first lead-fixed adhesive film layer is 0.1-3%.

[0011] Optionally, the thickness of the first lead-fixing adhesive film layer is 0.2~0.8 mm.

[0012] Optionally, it also includes a second lead-fixed adhesive film layer, which is disposed between the solar cell and the second substrate; The material of the first lead-fixing adhesive film layer may be the same as or different from the material of the second lead-fixing adhesive film layer.

[0013] Optionally, the second lead-fixing adhesive film layer includes a second adhesive film; the surface of the second adhesive film is provided with a coating layer formed by two-fluid spraying of a lead chelating agent, the coating layer containing ligands that have a chelating effect with lead ions.

[0014] Optionally, the lead chelating agent includes one or more of dithiosuccinic acid solution and disodium calcium edetate solution; The lead chelating agent has a mass fraction of 0.1-5%.

[0015] As a second aspect of the present application, the present application provides a solar cell module, including a solar cell and an encapsulation structure as described in any of the above.

[0016] Optionally, the solar cell is one of a single-junction perovskite solar cell, a perovskite / perovskite tandem solar cell, or a four-terminal perovskite-based tandem solar cell.

[0017] The embodiments of this application employing the above-described technical solution may have the following advantages: By setting a first lead-fixing film layer in the encapsulation structure, after the solar cell is broken and the lead-containing perovskite light-absorbing layer is exposed, the first lead-fixing film layer can fix the lead ions that leak or permeate from the perovskite light-absorbing layer through adsorption or chelation, thereby effectively controlling the leakage of lead ions in the lead-containing solar cell. This reduces the pollution of the environment and the harm to human health caused by lead leakage, and is conducive to the industrialization of battery modules and ecological environmental protection. Attached Figure Description

[0018] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0019] Figure 1 This is a schematic diagram of the packaging structure provided in Embodiment 1 of this application.

[0020] Figure 2 This is a schematic diagram of the packaging structure provided in Embodiment 2 of this application. Explanation of reference numerals in the attached figures: 1. First substrate; 2. First lead adhesive film layer; 3. Second substrate; 4. Solar cell; 5. Second lead adhesive film layer. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, 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.

[0023] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. It should be understood that these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein.

[0024] like Figures 1-2 As shown, in a first aspect, embodiments of this application may provide a packaging structure, which may include: The system includes a first substrate 1 and a second substrate 3; the first substrate 1 is ultra-clear transparent glass, and the second substrate 3 is ultra-clear rolled glass; or both the first substrate 1 and the second substrate 3 are ultra-clear rolled glass. The first substrate 1 and the second substrate 3 are sealed by a sealing structure to form a closed chamber between the first substrate 1 and the second substrate 3, and the closed chamber is used to house the solar cell 4. A first lead-fixing adhesive film layer 2 is disposed between the first substrate 1 and the solar cell 4, and the first lead-fixing adhesive film layer 2 is used to fix leaked lead ions. In the embodiments of this application, the sealing structure can be butyl rubber, or it can be the same material as the first lead-fixing adhesive film layer 2.

[0025] In this embodiment, by setting a first lead-fixing adhesive film layer 2 in the encapsulation structure, after the solar cell 4 is broken and the lead-containing perovskite light-absorbing layer is exposed, the first lead-fixing adhesive film layer 2 can fix the lead ions that leak or permeate from the perovskite light-absorbing layer by adsorption or chelation, thereby effectively controlling the leakage of lead ions in the lead-containing solar cell 4, thereby reducing the pollution of the environment and the harm to the human body caused by lead leakage, which is conducive to the industrial production expansion of battery modules and ecological environmental protection.

[0026] It should be noted that traditional technologies generally address lead leakage in battery modules using the following three methods: 1. Using batteries made from low-lead perovskite materials; 2. Inserting a passivation layer between the perovskite light-absorbing layer and the electrodes; 3. Borrowing from OLED encapsulation processes, employing composite multilayer structures of nano-oxide layers / polymers, such as silicon dioxide (SiO2) / silicon nitride (SiN). xMethods include nano-encapsulation of batteries using materials such as PMMA and PET. However, in Method 1, batteries or modules made from low-lead perovskite materials cannot eliminate the risk of lead ion leakage and also reduce the efficiency and stability of perovskite solar cells and their tandem cells. In Method 2, while adding a buffer layer to the device structure can suppress the migration and diffusion of lead ions in a short time, it loses its protection against lead ion leakage in outdoor applications, especially when the module is damaged by external forces. Similarly, in Method 3, the cost of encapsulating perovskite cells with a composite multilayer structure of nano-oxide layers / polymers is high, and the encapsulation layer is also prone to delamination or cracking under external forces, thermal cycling stress, etc., leading to lead leakage. When the module is damaged by external forces, the composite multilayer structure of nano-oxide layers / polymers loses its protection against lead ion leakage, and the leaked lead ions may seep directly into the soil, roofs, walls, and other environments through rainwater, damaging the ecosystem. In this embodiment, the first lead-fixing film layer 2 can chelate and adsorb the leaked lead ions after the component breaks and the lead-containing perovskite layer is exposed (fixing the leaked lead ions) and wait for the broken component to be recycled. Moreover, the encapsulation structure of this embodiment has strong process operability and low cost. Most importantly, it can solve the problem of lead leakage when the perovskite and stacked components break due to external force during outdoor application.

[0027] In an optional embodiment, the first lead-fixing adhesive film layer 2 includes a first adhesive film and a lead adsorbent mixed with the first adhesive film; wherein, the first adhesive film includes one or both of POE and EVA, and the particle size of the lead adsorbent is 0.1~10μm, for example, the particle size of the lead adsorbent can be 0.1μm, 0.2μm, 0.5μm, 5μm, or 10μm. The lead adsorbent used in this application has a particle size of 0.5μm. The material of the first adhesive film can be either POE or EVA, or a mixture of POE and EVA. POE is a polyolefin elastomer, belonging to ethylene-octene, ethylene-butene, or ethylene-propylene copolymers, characterized by good flexibility, low water absorption, and excellent resistance to thermo-oxidative aging, used to improve the component's anti-PID performance, weather resistance, and electrical insulation. EVA is an ethylene-vinyl acetate copolymer, with advantages such as high transparency, good heat-sealing performance, and low cost. In this embodiment, the material of the first adhesive film can be POE. The POE particles and lead adsorbent are mixed and dried, then melt-extruded, followed by casting, and finally slitting and winding to complete the preparation of the first lead-fixed adhesive film layer 2.

[0028] In optional embodiments, the lead adsorbent includes one or more of zeolite molecular sieves, attapulgite, clay, vermiculite, ion exchange resins, and activated carbon. In embodiments of this application, the lead adsorbent can be selected from various mixtures of zeolite molecular sieves, ion exchange resins, and activated carbon.

[0029] In this embodiment, zeolite molecular sieves exhibit high thermal stability and good dispersibility, and possess selective exchange capacity for lead ions, enabling stable adsorption of leaked lead ions. Attapulgite clay contains numerous fine channels and has a large specific surface area, providing excellent adsorption performance for lead ions, while also offering the advantage of low cost. Clay is easily dispersed, exhibits strong interlayer adsorption capacity, and is readily blendable with POE / EVA. Vermiculite is suitable for long-term, slow-release adsorption of lead ions and demonstrates good aging resistance. Ion exchange resins exhibit strong selectivity for lead ions. Activated carbon has a large specific surface area and tunable surface functional groups, enabling rapid adsorption of initially leaked lead, and can form a gradient protection mechanism when combined with other adsorbents.

[0030] In optional embodiments, the mass fraction of the lead adsorbent in the first lead-fixed adhesive film layer 2 is 0.1% to 3%, such as 0.1%, 1.5%, or 3%. In the embodiments of this application, the mass fraction of the lead adsorbent in the first lead-fixed adhesive film layer 2 is 1.5%.

[0031] In this embodiment, when the mass fraction of lead adsorbent in the first lead-fixed adhesive film layer 2 is less than 0.1%, the lead adsorption dose is insufficient, resulting in a slow response to leaked lead ions. This means it cannot intercept lead ions in the early stages of battery damage or effectively capture leaked lead ions during long-term battery aging. When the mass fraction of lead adsorbent in the first lead-fixed adhesive film layer 2 is greater than 3%, the lead adsorbent is difficult to disperse uniformly in the first film, easily agglomerating and settling, which affects the integrity of the final first lead-fixed adhesive film layer 2. Furthermore, excessive lead adsorbent affects the flexibility, tensile strength, and adhesion properties of the first lead-fixed adhesive film layer 2, impacting the interlayer encapsulation quality. Therefore, when the mass fraction of lead adsorbent in the first lead-fixed adhesive film layer 2 is 3%, uniform dispersion of the lead adsorbent in the first lead-fixed adhesive film layer 2 can be achieved without significantly affecting the mechanical strength of the first lead-fixed adhesive film layer 2, while simultaneously achieving a good lead capture rate for leaked lead ions.

[0032] In optional embodiments, the thickness of the first lead-fixing adhesive film layer 2 is 0.2~0.8 mm. For example, the thickness of the first lead-fixing adhesive film layer 2 can be 0.2 mm, 0.6 mm, or 0.8 mm. In the embodiment of this application, the thickness of the first lead-fixing adhesive film layer 2 is 0.6 mm.

[0033] In an optional embodiment, a second lead-fixing adhesive film layer 5 is further included, which is disposed between the solar cell 4 and the second substrate 3; wherein the material of the first lead-fixing adhesive film layer 2 is the same as or different from the material of the second lead-fixing adhesive film layer 5. The material of the second film can be either POE or EVA, or a mixture of POE and EVA. The second lead-fixing adhesive film layer 5 and the first lead-fixing adhesive film layer 2 are used together to further increase the fixation of leaked lead ions and improve the lead ion capture efficiency.

[0034] In an optional embodiment, the second lead-fixed adhesive film layer 5 includes a second adhesive film; the surface of the second adhesive film is provided with a coating layer formed by two-fluid spraying of a lead chelating agent, the coating layer containing ligands that chelate with lead ions. The chelating agent is added to deionized water or an ethanol / water mixture and stirred until completely dissolved to obtain an aqueous solution of the chelating agent. The second adhesive film is then placed on a controllable conveyor belt or a stationary platform, and the two-fluid spraying system is activated to uniformly spray the aqueous solution of the chelating agent onto both surfaces of the second adhesive film in an atomized form, forming a coating layer. That is, the coating layer is located on the upper and lower opposite surfaces of the second adhesive film. The film is then dried by compressed air at a temperature of 25°C, thereby completing the preparation of the second lead-fixed adhesive film layer 5. Furthermore, the first lead-fixed adhesive film layer 2 can be the same as the second lead-fixed adhesive film layer 5; therefore, the first lead-fixed adhesive film layer 2 can also have a coating layer formed by two-fluid spraying of a lead chelating agent on both surfaces of the first adhesive film.

[0035] In this embodiment, by forming a coating layer containing a lead chelating agent on the surface of the second adhesive film, the released lead ions can be efficiently captured and fixed when the battery module is damaged or leaks due to aging. The chelating agent can quickly react with the leaked lead ions on the surface of the second adhesive film to form a stable complex, inhibiting the migration and diffusion of lead ions and effectively preventing them from entering the environment, thereby improving the environmental performance and recyclability of the module.

[0036] In optional embodiments, the lead chelating agent includes one or more of dithiosuccinic acid solution and disodium calcium edetate solution. The lead chelating agent can be a dithiosuccinic acid solution or a disodium calcium edetate solution, or it can be a mixture of dithiosuccinic acid solution and disodium calcium edetate solution. The mass fraction of the lead chelating agent is 0.1% to 5%.

[0037] In this embodiment, the dithiosuccinic acid solution exhibits good water solubility, low toxicity, high stability, and minimal dissociation. It also demonstrates excellent selectivity for lead ions, with its thiol groups (-SH) strongly binding them. The disodium calcium edetate solution also exhibits excellent water solubility, is environmentally friendly, and has low cost. It is highly stable and highly selective for lead ions, with its carboxyl groups (-COOH) forming multi-site coordination complexes that can uniformly capture lead ion leaks over large areas, providing a large-area, uniform protection effect.

[0038] However, when the volume fraction of the lead chelating agent is less than 0.1%, the resulting coating layer has a low content, making it unable to capture large amounts of leaked lead ions in a timely manner. Furthermore, the chelation efficiency decreases, increasing the risk of secondary contamination. Conversely, when the mass fraction of the lead chelating agent is greater than 5%, the resulting solution concentration is high, leading to uneven coating thickness, difficulty in drying, and an overly dense coating that reduces water vapor exchange, affecting the permeability or lamination performance of the encapsulation material. Therefore, a lead chelating agent mass fraction of 5% can form a complete coating layer on the surface of the second adhesive film, allowing for rapid reaction and fixation of lead ions in the initial stage of release, preventing lead ion diffusion.

[0039] Secondly, embodiments of this application may provide a solar cell module, the solar cell including a solar cell 4 and an encapsulation structure as described in any of the above embodiments.

[0040] In optional embodiments, the solar cell 4 is one of a single-junction perovskite solar cell, a perovskite / perovskite tandem solar cell, or a four-terminal perovskite-based tandem solar cell. All of the above-mentioned solar cells 4 contain lead ions, and therefore all suffer from lead ion leakage. The encapsulation structure in the solar cells of this application embodiment can improve the lead leakage problem, thereby achieving effective control of lead ions in the lead-containing solar cell 4, which is beneficial for industrial production expansion and environmental protection.

[0041] The following specific embodiments provide a more detailed description of this application, but should not be construed as limiting the application. Any modifications or substitutions made to the methods, steps, or conditions of this application without departing from the spirit and substance of this application are within the scope of this application.

[0042]

Example 1

[0043] A first lead-fixed adhesive film layer 2 is disposed between the first substrate 1 and the solar cell 4. The first lead-fixed adhesive film layer 2 includes a first adhesive film and a lead adsorbent mixed with the first adhesive film. The thickness of the first lead-fixed adhesive film layer 2 is 0.6 mm. The first adhesive film is POE, and the lead adsorbent is zeolite molecular sieve, ion exchange resin, and activated carbon. The sealing structure is made of the same material as the first lead-fixed adhesive film layer 2. The mass fraction of the lead adsorbent in the first lead-fixed adhesive film layer 2 is 1.5%. Because the first lead-fixed adhesive film layer 2 uses a lead adsorbent, it is not a completely transparent structure. Therefore, the first lead-fixed adhesive film layer 2 is located on the back of the solar cell 4, and the solar cell 4 is a single-cell perovskite cell. Furthermore, since the first lead-fixed adhesive film layer 2 and the second lead-fixed adhesive film layer 5 can be the same, the first lead-fixed adhesive film layer 2 can also be replaced by the second lead-fixed adhesive film layer 5. The second lead-fixed adhesive film layer 5 includes a second adhesive film; the surface of the second adhesive film is provided with a coating layer formed by two-fluid spraying of a lead chelating agent. The coating layer contains ligands that chelate with lead ions. The lead chelating agent is a dithiosuccinic acid solution with a mass fraction of 5%.

[0044]

Example 2

[0045] A first lead-fixing adhesive layer 2 is disposed between the first substrate 1 and the solar cell 4, and a second lead-fixing adhesive layer 5 is disposed between the solar cell 4 and the second substrate 3. The second lead-fixing adhesive layer 5 includes a second adhesive film; the surface of the second adhesive film is provided with a coating layer formed by two-fluid spraying of a lead chelating agent, the coating layer containing ligands that chelate with lead ions. The lead chelating agent is a dithiosuccinic acid solution with a mass fraction of 5%. The material of the sealing structure is the same as that of the first lead-fixing adhesive layer 2 or the second lead-fixing adhesive layer 5. In this embodiment, the second lead-fixing adhesive layer 5 can also be used instead of the first lead-fixing adhesive layer 2. Sunlight enters the solar cell 4 through the second lead-fixing adhesive layer 5 along the direction of the light-incident surface. The second lead-fixing adhesive layer 5 is a transparent material and does not affect the irradiation of sunlight. Therefore, the battery string can be encapsulated, and the solar cell 4 is a two-terminal crystalline silicon / perovskite tandem solar cell.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] For ease of description, directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom" generally indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the components themselves. For example, if a device in the drawings is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0048] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] Unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0051] It should also be noted that the terms "one embodiment," "another embodiment," or "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0052] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0053] It should also be noted that the above are merely preferred embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A packaging structure, characterized in that, It includes a first substrate (1) and a second substrate (3); the first substrate (1) and the second substrate (3) are sealed by a sealing structure so that a sealed chamber is formed between the first substrate (1) and the second substrate (3), and the sealed chamber is used to set up a solar cell (4); A first lead-fixing adhesive film layer (2) is provided between the first substrate (1) and the solar cell (4), and the first lead-fixing adhesive film layer (2) is used to fix the leaked lead ions.

2. The packaging structure according to claim 1, characterized in that, It also includes a second lead-fixed adhesive film layer (5), which is disposed between the solar cell (4) and the second substrate (3); The material of the first lead-fixing adhesive film layer (2) may be the same as or different from the material of the second lead-fixing adhesive film layer (5).

3. The packaging structure according to claim 2, characterized in that, The second lead-fixing adhesive film layer (5) includes a second adhesive film; the surface of the second adhesive film is provided with a coating layer formed by two-fluid spraying treatment with a lead chelating agent.

4. A solar cell module, characterized in that, It includes a solar cell (4) and an encapsulation structure as described in any one of claims 1 to 3.

5. The solar cell module according to claim 4, characterized in that, The solar cell (4) is one of the following: a single-junction perovskite solar cell, a perovskite / perovskite tandem solar cell, or a four-terminal perovskite-based tandem solar cell.

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