Solar cell preparation method and solar cell

Abstract

The invention discloses a solar cell preparation method and a solar cell, and belongs to the technical field of new energy batteries. The preparation method of the solar cell comprises the following steps: printing ink with the same color as the surface film of the solar cell on the front surface of the solar cell by adopting an ink-jet printing technology; and curing the ink on the solar cell to form an identification code with traceable information. According to the solar cell prepared by adopting the preparation method of the solar cell, the grid-line-free surfaces of the cell pieces can be prevented from being damaged in the metallization process, the finished product quality of the cell pieces is ensured, meanwhile, the use of isolation paper or isolation glue between two adjacent cell pieces in the stacking, transporting and using processes can be omitted, and the transportation cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of solar cell technology, specifically to a method for preparing a solar cell and a solar cell. Background Technology

[0002] A solar cell (photovoltaic system) is a clean energy system that directly converts solar energy into electrical energy using the photovoltaic effect. A back-contact solar module is a solar cell where the light-facing side of the cell has no electrodes, and both the positive and negative electrodes are located on the back-facing side of the cell. This design reduces shading of the cells by the electrodes, increases the short-circuit current, and improves the energy conversion efficiency of the cell.

[0003] Back-contact solar cells in related technologies typically suffer from the following problems;

[0004] 1) Due to the gridless structure of back-contact solar cells, in order to avoid damage to the gridless side of the finished cells, release paper or release adhesive is usually used to protect adjacent cells during stacking, transportation and use. However, this method will affect the stacking efficiency of the cells and increase the transportation cost of the cells.

[0005] 2) Electroplating metallization processes typically involve various strong acid and alkali treatments, such as the removal and decontamination of the surface oxide layer before electroplating, the acidic and peroxide environments during electroplating, and the strong alkali treatment during mask removal. However, in the back contact battery process, after metallization, the gridless surface is often protected with a mask by inkjet printing, screen printing, or dispensing, without any protective measures taken before metallization. This makes the gridless surface of the battery cell easily damaged during the metallization process, affecting the quality of the finished battery cell.

[0006] Therefore, there is an urgent need for a solar cell fabrication method and a solar cell to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a method for preparing a solar cell and a solar cell that can avoid damage to the gridless surface of the cell during the metallization process, ensuring the quality of the finished cell. At the same time, it can eliminate the need for the use of separator paper or separator adhesive between adjacent cells during stacking, transportation and use, thereby reducing transportation costs.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A method for fabricating a solar cell includes the following steps:

[0010] Inkjet printing technology is used to print ink with the same color as the surface film of the solar cell onto the front side of the solar cell;

[0011] The ink on the solar cell is cured to form an identification code with traceable information.

[0012] As a preferred embodiment of the solar cell fabrication method provided by the present invention, the method further includes the following steps before inkjet printing on the front side of the solar cell:

[0013] Test the film color information on the surface of the solar cell;

[0014] Configure the ink according to the film color information.

[0015] In a preferred embodiment of the solar cell fabrication method provided by the present invention, the ink is a UV adhesive.

[0016] In a preferred embodiment of the solar cell fabrication method provided by the present invention, the thickness of the identification code is 3μm to 20μm.

[0017] As a preferred embodiment of the solar cell preparation method provided by the present invention, an ultraviolet light curing process is used to cure the ink on the solar cell sheet.

[0018] As a preferred embodiment of the solar cell preparation method provided by the present invention, the ultraviolet light intensity during the ultraviolet curing process is 1000mj / cm2~40000mj / cm2.

[0019] And / or, the curing energy of the ink is 200 mJ / cm. 2 ~120000mj / cm 2 .

[0020] As a preferred embodiment of the solar cell preparation method provided by the present invention, the method further includes, after the ultraviolet curing process, curing the ink on the solar cell by means of thermal curing.

[0021] As a preferred embodiment of the solar cell preparation method provided by the present invention, the curing temperature during thermal curing is 60℃~300℃; and / or the curing time is 1min~360min.

[0022] As a preferred embodiment of the solar cell fabrication method provided by the present invention, the identification code is one of DM code, QR code and one-dimensional code.

[0023] In a preferred embodiment of the solar cell fabrication method provided by the present invention, the QR code is a dot-matrix QR code.

[0024] The present invention also provides a solar cell, which is prepared by the solar cell preparation method described above.

[0025] The beneficial effects of this invention are as follows:

[0026] The solar cell manufacturing method provided by this invention can be applied before the electroplating metallization process. By inkjet printing an identification code on the front side of the solar cell, damage to the gridless surface of the solar cell can be avoided during the metallization process, thus ensuring the quality of the finished solar cell. Furthermore, it eliminates the need for separator paper or adhesive between adjacent solar cells during stacking, transportation, and use, reducing transportation costs. In addition, the identification code contains traceability information for the solar cell, facilitating process tracking and providing corresponding data support for intelligent quality control. By using ink of the same color as the surface film of the solar cell to form the identification code, color differences on the solar cell surface caused by the identification code can be avoided, thereby improving the overall appearance consistency and quality of the finished solar cell.

[0027] The solar cell provided by this invention, by applying the above-described solar cell preparation method, can avoid damage to the gridless surface of the solar cell during the metallization process, ensuring the overall appearance consistency and quality of the solar cell, and reducing transportation costs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention 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 the content of the embodiments of the present invention and these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the solar cell provided in Embodiment 1 of the present invention;

[0030] Figure 2 This is a cross-sectional view of the solar cell provided in Embodiment 1 of the present invention;

[0031] Figure 3 This is a flowchart of the solar cell fabrication method provided in Embodiment 2 of the present invention.

[0032] Figure label:

[0033] 100. Solar cell; 200. Identification code. Detailed Implementation

[0034] Before explaining any embodiments of the invention in detail, it should be understood that the invention is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the accompanying drawings.

[0035] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0036] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0037] In this invention, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0038] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0039] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0040] In this invention, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this invention. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0041] Example 1

[0042] Figure 1 A schematic diagram of the structure of the solar cell provided in this embodiment is shown. Figure 2 A cross-sectional structural schematic diagram of the solar cell provided in this embodiment is shown. Figures 1-2 As shown, this embodiment provides a solar cell, which includes a solar cell 100 and an identification code 200 disposed on the solar cell 100. The identification code 200 contains traceability information of the solar cell. The traceability information may include any information from the solar cell manufacturing process, such as the grade of the solar cell, information about the equipment used to manufacture the solar cell, etc. By setting the identification code 200 with traceability information on the solar cell 100, it is easy to trace the process information of the solar cell and provide corresponding data support to facilitate intelligent quality control.

[0043] Furthermore, this solar cell is a back-contact solar cell, with the identification code 200 located on the front side of the solar cell 100. This arrangement, on the one hand, prevents damage to the gridless surface of the solar cell 100 during the metallization process, thus ensuring the quality of the finished solar cell 100; on the other hand, it eliminates the need for insulating paper or adhesive between adjacent solar cells 100 during stacking, transportation, and use, thereby reducing transportation costs.

[0044] In this embodiment, the identification code 200 is formed by printing pre-configured ink onto the solar cell 100 using inkjet printing technology and then curing it. Inkjet printing technology is a digital manufacturing technology that forms a patterned functional layer by precisely spraying tiny ink droplets onto the surface of a substrate. Compared with traditional laser ablation coding technology, using inkjet printing technology to form the identification code 200 on the solar cell 100 can reduce the breakage rate and microcrack rate, thereby avoiding the impact on the appearance of the solar cell after printing, improving the code reading success rate, and ensuring the mechanical load reliability of the solar cell and the conversion efficiency of the solar cell 100.

[0045] In this embodiment, the identification code 200 formed on the solar cell 100 uses ultraviolet (UV) adhesive as the ink. UV adhesive has the advantages of fast curing, solvent-free, pollution-free, high bonding strength, and good optical performance. The UV adhesive is sprayed onto the solar cell 100 through the printhead of an inkjet printer to form a preset pattern, which can be a regular combination of dots and lines or a QR code graphic, thereby realizing the information traceability function.

[0046] Optionally, the identification code 200 can be any of the following: DM code, QR code, barcode, text, or numbers. Among these, the QR code is preferably a dot-matrix QR code. Dot-matrix QR codes have higher information density and storage capacity, stronger resistance to soiling and fault tolerance, flexible shape and size adaptability, and better concealment and anti-counterfeiting performance.

[0047] After the UV adhesive is sprayed onto the solar cell 100 to form a preset pattern, the image needs to be cured. In this embodiment, photocuring is preferred. Photocuring can form a clear and complete identification code 200 on the textured surface of the solar cell 100, while effectively preventing ink diffusion that could cause the pattern to collapse, greatly improving the success rate of subsequent code reading. Furthermore, it eliminates the need for complex damaging processing, does not introduce new stress, and does not affect the mechanical properties of the solar cell 100. In this case, the inkjet printing equipment can spray the UV adhesive layer by layer onto the solar cell 100, and then cure it layer by layer under light, ultimately forming an identification code 200 with a three-dimensional solid structure. This process does not cause mechanical damage to the solar cell 100.

[0048] In some embodiments, the curing energy of the UV adhesive is 200 mJ / cm² to 120,000 mJ / cm², which facilitates the rapid curing of the ink pattern layer on the solar cell 100, allowing it to quickly cure into the identification code 200 before being spread out, without introducing new stress, thus improving the mechanical properties of the solar cell. Exemplarily, the curing energy of the UV adhesive can be 200 mW / cm², 500 mW / cm², or 800 mW / cm².2 1000mw / cm 2 2000mw / cm 2 3000mw / cm 2 4000mw / cm 2 5000mw / cm 2 6000mw / cm 2 7000mw / cm 2 8000mw / cm 2 9000mw / cm 2 The curing energy of UV adhesives can range from 10,000 mw / cm², 11,000 mw / cm², to 12,000 mw / cm², etc. However, the curing energy of UV adhesives is not limited to these values ​​and can be adjusted according to the actual curing requirements of the product. More preferably, the curing energy of UV adhesives is 500 mj / cm² to 2000 mj / cm².

[0049] In some embodiments, the light intensity during photocuring is 1000 mw / cm² to 40000 mw / cm², which can further improve the curing speed of the UV adhesive and ensure the mechanical properties of the solar cell. For example, the light intensity during photocuring can be 1000 mw / cm². 2 2000mw / cm 2 3000mw / cm 2 4000mw / cm 2 5000mw / cm 2 6000mw / cm 2 7000mw / cm 2 8000mw / cm 2 9000mw / cm 2 10000mw / cm 2 Examples of light intensity values ​​include 20,000 mw / cm², 30,000 mw / cm², and 40,000 mw / cm². Of course, the light intensity during photocuring is not limited to these values ​​and can be adjusted to meet the specific curing requirements of the product.

[0050] In some embodiments, the thickness of the identification code 200 is 3μm to 20μm. Using this thickness range for the identification code 200 avoids the problem of excessive thickness affecting the curing speed, causing ink spreading and affecting the precision of the identification code 200. It also avoids the problem of insufficient thickness preventing stable support between adjacent solar cells 100 during stacking, thus protecting the grid-free surface of the solar cells 100 from damage. For example, the thickness of the identification code 200 can be 3.0μm, 4.0μm, 5.0μm, 6.0μm, 7.0μm, 8.0μm, 9.0μm, 10.0μm, 11.0μm, 12.0μm, 13.0μm, 14.0μm, 15.0μm, 16.0μm, 17.0μm, 18.0μm, 19.0μm, 20.0μm, etc. Of course, the thickness of the identification code 200 is not limited to the above values, and it can be adjusted according to actual product needs.

[0051] It should be noted that this embodiment does not limit the curing time of the light curing process, and the operator can make adaptive adjustments to the curing time according to the actual curing requirements.

[0052] To further improve the curing effect of the UV adhesive, a heat curing treatment can be performed after the photocuring process. In some embodiments, the heat curing temperature is 60℃ to 300℃. This curing temperature can ensure curing efficiency while avoiding uneven curing defects caused by localized overheating of the ink pattern layer on the solar cell 100, thereby ensuring the molding quality of the identification code 200. Exemplarily, the heat curing temperature can be 60℃, 70℃, 80℃, 90℃, 100℃, 110℃, 120℃, 130℃, 140℃, 150℃, 160℃, 170℃, 180℃, 190℃, 200℃, 210℃, 220℃, 230℃, 240℃, 250℃, 260℃, 270℃, 280℃, 290℃, or 300℃. Of course, the heat curing temperature is not limited to the above values ​​and can be adaptively adjusted according to actual curing requirements.

[0053] In some embodiments, the heat curing time is 1 min to 360 min. It should be noted that this embodiment does not limit the heat curing time; the operator can adjust the heat curing time adaptably according to the heat curing temperature. For example, when the heat curing temperature is 180°C, the heat curing time can be 20 min; when the heat curing temperature is 150°C to 250°C, the heat curing time can be 5 min to 25 min.

[0054] Continue as Figures 1-2As shown, to avoid color differences on the surface of the finished solar cell due to the difference in film color between the identification code 200 and the solar cell 100, which would affect the overall appearance consistency of the finished solar cell, in this embodiment, the film color of the UV adhesive is the same as the film color of the solar cell 100. Before spraying the UV adhesive onto the solar cell 100, the film color of the solar cell 100 can be detected using a visual measuring instrument, and then a UV adhesive with the same film color as the solar cell 100 can be prepared so that the identification code 200 can be formed by spraying the UV adhesive with the same film color as the solar cell 100 onto the solar cell 100.

[0055] Example 2

[0056] Figure 3 A flowchart illustrating the solar cell fabrication method provided in this embodiment is shown. Figure 3 and combined Figure 1 , Figure 2 As shown, this embodiment provides a method for preparing a solar cell, used to prepare the solar cell in Embodiment 1.

[0057] Specifically, the method for fabricating this solar cell includes the following steps:

[0058] S1. Inkjet printing technology is used to print ink with the same color as the surface film of the solar cell 100 on the front side of the solar cell 100;

[0059] S2. The ink on the solar cell 100 is cured to form an identification code 200 with traceable information.

[0060] The solar cell manufacturing method provided in this embodiment can be applied before the electroplating metallization process. By inkjet printing an identification code 200 on the front side of the solar cell 100, damage to the gridless surface of the solar cell 100 during the metallization process can be avoided, thus ensuring the quality of the finished solar cell. Furthermore, the use of separator paper or adhesive between adjacent solar cells 100 during stacking, transportation, and use can be eliminated, reducing transportation costs. In addition, the identification code 200 contains traceability information of the solar cell, facilitating the tracking of process information and providing corresponding data support, thereby achieving intelligent quality control. By using ink with the same color as the surface film of the solar cell 100 to form the identification code 200, color differences on the solar cell surface caused by the identification code 200 can be avoided, thus improving the overall appearance consistency and quality of the finished solar cell.

[0061] Furthermore, prior to inkjet printing on the front side of the solar cell 100, the following steps are also included:

[0062] Test the film color information on the surface of solar cell 100;

[0063] Configure the ink according to the above film color information.

[0064] Specifically, before spraying UV adhesive onto the solar cell 100, a visual measuring instrument can be used to detect the film color of the solar cell 100. Then, an ink with the same film color as the solar cell 100 can be prepared and sprayed onto the solar cell 100 to form an identification code 200, thereby avoiding the problem of color difference on the surface of the solar cell caused by the setting of the identification code 200.

[0065] In this embodiment, the ink is a UV adhesive. UV adhesive has the advantages of fast curing, solvent-free, pollution-free, high bonding strength, and good optical properties. The UV adhesive is sprayed onto the solar cell 100 through the printhead of an inkjet printer to form a preset pattern, which can be a regular combination of dots and lines or a QR code graphic, thereby realizing information traceability function.

[0066] Optionally, the ink on the solar cell 100 is cured using an ultraviolet (UV) light curing process. After curing, a clear and complete identification code 200 is formed on the textured surface of the solar cell 100. This effectively prevents ink diffusion and pattern collapse, significantly improving the success rate of subsequent code reading. Furthermore, it eliminates the need for complex, damaging processing, does not introduce new stress, and does not affect the mechanical properties of the solar cell 100.

[0067] In some embodiments, the curing energy of the UV adhesive is 200 mJ / cm² to 120,000 mJ / cm², which facilitates the rapid curing of the ink pattern layer on the solar cell 100, allowing it to quickly cure into the identification code 200 before being spread out, without introducing new stress, thus improving the mechanical properties of the solar cell. Exemplarily, the curing energy of the UV adhesive can be 200 mW / cm², 500 mW / cm², or 800 mW / cm². 2 1000mw / cm 2 2000mw / cm 2 3000mw / cm 2 4000mw / cm 2 5000mw / cm 2 6000mw / cm 2 7000mw / cm 2 8000mw / cm 2 9000mw / cm 2The curing energy of UV adhesives can range from 10,000 mw / cm², 11,000 mw / cm², to 12,000 mw / cm², etc. However, the curing energy of UV adhesives is not limited to these values ​​and can be adjusted according to the actual curing requirements of the product. More preferably, the curing energy of UV adhesives is 500 mj / cm² to 2000 mj / cm².

[0068] In some embodiments, the light intensity during photocuring is 1000 mw / cm² to 40000 mw / cm², which can further improve the curing speed of the UV adhesive and ensure the mechanical properties of the solar cell. For example, the light intensity during photocuring can be 1000 mw / cm². 2 2000mw / cm 2 3000mw / cm 2 4000mw / cm 2 5000mw / cm 2 6000mw / cm 2 7000mw / cm 2 8000mw / cm 2 9000mw / cm 2 10000mw / cm 2 20000mw / cm 2 30000mw / cm 2 40000mw / cm 2 Of course, the light intensity during photocuring is not limited to the values ​​mentioned above; it can be adjusted according to the actual curing requirements of the product.

[0069] In some embodiments, the thickness of the identification code 200 is 3μm to 20μm. Using this thickness range for the identification code 200 avoids the problem of excessive thickness affecting the curing speed, causing ink spreading and affecting the precision of the identification code 200. It also avoids the problem of insufficient thickness preventing stable support between adjacent solar cells 100 during stacking, thus protecting the grid-free surface of the solar cells 100 from damage. For example, the thickness of the identification code 200 can be 3.0μm, 4.0μm, 5.0μm, 6.0μm, 7.0μm, 8.0μm, 9.0μm, 10.0μm, 11.0μm, 12.0μm, 13.0μm, 14.0μm, 15.0μm, 16.0μm, 17.0μm, 18.0μm, 19.0μm, 20.0μm, etc. Of course, the thickness of the identification code 200 is not limited to the above values, and it can be adjusted according to actual product needs.

[0070] It should be noted that this embodiment does not limit the curing time of the light curing process, and the operator can make adaptive adjustments to the curing time according to the actual curing requirements.

[0071] To further improve the curing effect of the UV adhesive, the process includes, after the UV curing process, curing the ink protective layer on the solar cell 100 using a thermal curing method. In some embodiments, the thermal curing temperature is 60℃ to 300℃. This curing temperature can ensure curing efficiency while avoiding uneven curing defects caused by localized overheating of the ink pattern layer on the solar cell 100, thereby ensuring the molding quality of the identification code 200. Exemplarily, the thermal curing temperature can be 60℃, 70℃, 80℃, 90℃, 100℃, 110℃, 120℃, 130℃, 140℃, 150℃, 160℃, 170℃, 180℃, 190℃, 200℃, 210℃, 220℃, 230℃, 240℃, 250℃, 260℃, 270℃, 280℃, 290℃, or 300℃. Of course, the thermal curing temperature is not limited to the above values ​​and can be adjusted adaptively according to actual curing requirements.

[0072] In some embodiments, the heat curing time is 1 min to 360 min. It should be noted that this embodiment does not limit the heat curing time; the operator can adjust the heat curing time adaptably according to the heat curing temperature. For example, when the heat curing temperature is 180°C, the heat curing time can be 20 min; when the heat curing temperature is 150°C to 250°C, the heat curing time can be 5 min to 25 min.

[0073] Experimental verification shows that the solar cells prepared using the solar cell preparation method provided in this embodiment have the following advantages: 1) The identification code 200 can protect the textured surface of the solar cell 100 from physical damage during the electroplating metallization process; 2) Single-cell coding traceability of solar cells can be realized; 3) The finished solar cells have better appearance consistency and quality, and can reduce the conversion efficiency by 0.16% to 0.32%.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A method for preparing a solar cell, characterized in that, Includes the following steps: Inkjet printing technology is used to print ink with the same color as the surface film of the solar cell (100) onto the front side of the solar cell (100); The ink on the solar cell (100) is cured to form an identification code (200) with traceable information.

2. The method for preparing a solar cell according to claim 1, characterized in that, Before inkjet printing is performed on the front side of the solar cell (100), the following steps are also included: Test the film color information on the surface of the solar cell (100); Configure the ink according to the film color information.

3. The method for preparing a solar cell according to claim 1, characterized in that, The ink is a UV adhesive.

4. The method for preparing a solar cell according to claim 1, characterized in that, The thickness of the identification code (200) is 3μm to 20μm.

5. The method for preparing a solar cell according to claim 1, characterized in that, The ink on the solar cell (100) is cured using an ultraviolet light curing process.

6. The method for preparing a solar cell according to claim 5, characterized in that, When performing the ultraviolet curing process, the intensity of ultraviolet light is 1000mj / cm2~40000mj / cm2; And / or, the curing energy of the ink is 200 mJ / cm. 2 ~120000mj / cm 2 .

7. The method for preparing a solar cell according to claim 5, characterized in that, The process includes, after the ultraviolet curing process, curing the ink on the solar cell (100) by means of thermal curing.

8. The method for preparing a solar cell according to claim 7, characterized in that, During thermosetting, the curing temperature is 60℃~300℃; and / or the curing time is 1min~360min.

9. The method for preparing a solar cell according to any one of claims 1 to 8, characterized in that, The identification code (200) is one of DM code, QR code and one-dimensional code.

10. The method for preparing a solar cell according to claim 9, characterized in that, The QR code is a dotted two-dimensional code.

11. A solar cell, characterized in that, The solar cell is prepared using the solar cell preparation method as described in any one of claims 1 to 10.

Images